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Journal articles on the topic 'Orthodontic aligner'
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1
Gold, Binu Punnoose, Suvetha Siva, Sangeetha Duraisamy, Azmina Idaayath, and Ravi Kannan. "Properties of Orthodontic Clear Aligner Materials - A Review." Journal of Evolution of Medical and Dental Sciences 10, no. 37 (September 13, 2021): 3288–94. http://dx.doi.org/10.14260/jemds/2021/668.
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BACKGROUND Clear aligners are orthodontic devices that are transparent, a plastic used to correct malaligned teeth. Here patient wears a series of customized clear, removable aligners that gradually move the teeth to the desired position. The clear aligner system is a modern adaptation of the systems described since the middle of the 20th century, therefore there were different devices and philosophies that have led to its creation and the system has evolved a lot over the decades. Clear aligner therapy has been a part of the orthodontic practice for years, but, popularity was increased since the introduction of Invisalign appliances (Align Technology) in 1998. There are almost 27 different clear aligner products currently on offer for orthodontic treatment. Nowadays, more people prefer clear aligner treatment because it is aesthetically superior to brackets and lingual orthodontics. The superiority of clear aligners lies in their aesthetics. The optical properties of the clear aligner material play a major role in aesthetics. The rising demand among adult patients for “invisible” orthodontic treatment has led to an exponential growth in the clear aligner market. Indeed, these aligners have a low aesthetic impact, as well as being able to effectively and progressively guide the teeth into their programmed positions. They are also removable and therefore do not hamper oral hygiene maintenance, in turn reducing the risk of white spots, caries, gingivitis and periodontal disease. All the materials do not possess the same chemical composition. The properties change before and after wear. In this article, we bring out the different materials used for the manufacture of clear aligners and their various properties. KEY WORDS Clear Aligners, Optical Properties, Thermoplastic Material, Mechanical Properties
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Shah, Manan Jignesh, Ajay Kantilal Kubavat, Khyati Viral Patel, and Nikunj Harikrishna Prajapati. "Fabrication of in-house aligner- A review." Journal of Contemporary Orthodontics 6, no. 3 (September 15, 2022): 120–24. http://dx.doi.org/10.18231/j.jco.2022.022.
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As the demand for aesthetic treatments is increasing, more people are seeking alternatives to fixed orthodontic appliances. Clear aligners are aesthetically pleasing and comfortable option for orthodontic treatment and have gained immense popularity over the last decade. Moreover, with increasing demand there has been a constant attempt for cost reductions by number of aligner companies and laboratories. It will be beneficial not only to orthodontist but also to patients if aligners can be fabricated in-house itself. Thus, this review will highlight the fabrication of In-house aligners in detail.
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Налбандян, М. С., Г. Ю. Тер-Погосян, and Э. Р. Казарян. "ПЕРСПЕКТИВЫ ПРИМЕНЕНИЯ ЭЛАЙНЕРОВ В СОВРЕМЕННОЙ ОРТОДОНТИИ." MEDICINE, SCIENCE AND EDUCATION, no. 33 (May 2022): 122–24. http://dx.doi.org/10.56936/18291775-2022.33-122.
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The clear aligner treatment in the last years has been increasing its relevance and use. The use of aligners to treat malocclusion has had a remarkable surge in the last decades, a growing interest has been reported for such methods of invisible orthodontics, especially among adult patients. Clear aligners are orthodontic devices that use elastic thermoplastic material, applying pressure to the teeth to move into the aligner’s position, being an alternative to dental braces. They are esthetic, efficient, and comfortable compared to a traditional fixed appliance for mild-to-moderate malocclusion. A clinician should know strengths and weaknesses of aligners for a correct use, being guided by clinical indications. The present paper will highlight the increasing popularity of clear aligner appliances, as well as the clinical scope and the limitations of aligner therapy in general.
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Shetty, Sanjana, and Naazia Shaikh. "Clear aligner therepy – A review." Journal of Dental Specialities 9, no. 2 (December 15, 2021): 46–52. http://dx.doi.org/10.18231/j.jds.2021.013.
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Aesthetics is a major factor in Orthodontic treatment and it is a primary concern among patients seeking orthodontic treatment. To meet the growing aesthetic desire for an alternative to traditional braces, researchers have created a variety of alternatives, including ceramic or composite braces, lingual orthodontics, and transparent aligners. Clear aligner therapy is a treatment that consists of a set of clear dental appliances that are custom-made to fit the contour of a patient's teeth. Clear Aligners are an alternative to traditional braces that are used to guide teeth into appropriate alignment. Clear aligners, like braces, utilise a progressive force to regulate tooth movement, but without the need of metal wires or brackets.
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Shetty, Sharath Kumar, Cecilia Wilson, Mahesh Kumar Y, and Vijayananda K. Madhur. "Orthodontic Treatment with Clear Aligners." Scholars Journal of Dental Sciences 8, no. 7 (August 13, 2021): 230–33. http://dx.doi.org/10.36347/sjds.2021.v08i07.008.
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The paradigm shift in orthodontics arrived with the introduction of Aligner System. It allows both dental practitioner and patient to develop a visual understanding of orthodontic tooth movement. The esthetic and practical advantages of the system have extended orthodontic services to a greater population. The transparency of the clear aligners enhances its esthetic appeal for those adult patients who are averse to wearing conventional labial fixed orthodontic appliances. Although guidelines about the types of malocclusions that this technique can treat exist, few clinical studies have assessed the effectiveness of the appliance.
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Seo, Jeong-Hee, Emmanuel Eghan-Acquah, Min-Seok Kim, Jeong-Hyeon Lee, Yong-Hoon Jeong, Tae-Gon Jung, Mihee Hong, Won-Hyeon Kim, Bongju Kim, and Sung-Jae Lee. "Comparative Analysis of Stress in the Periodontal Ligament and Center of Rotation in the Tooth after Orthodontic Treatment Depending on Clear Aligner Thickness—Finite Element Analysis Study." Materials 14, no. 2 (January 9, 2021): 324. http://dx.doi.org/10.3390/ma14020324.
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Lately, in orthodontic treatments, the use of transparent aligners for the correction of malocclusions has become prominent owing to their intrinsic advantages such as esthetics, comfort, and minimal maintenance. Attempts at improving upon this technology by varying various parameters to investigate the effects on treatments have been carried out by several researchers. Here, we aimed to investigate the biomechanical and clinical effects of aligner thickness on stress distributions in the periodontal ligament and changes in the tooth’s center of rotation. Dental finite element models comprising the cortical and cancellous bones, gingiva, teeth, and nonlinear viscoelastic periodontal ligaments were constructed, validated, and used together with aligner finite element models of different aligner thicknesses to achieve the goal of this study. The finite element analyses were conducted to simulate the actual orthodontic aligner treatment process for the correction of malocclusions by generating pre-stresses in the aligner and allowing the aligner stresses to relax to induce tooth movement. The results of the analyses showed that orthodontic treatment in lingual inclination and axial rotation with a 0.75 mm-thick aligner resulted in 6% and 0.03% higher principal stresses in the periodontal ligament than the same treatment using a 0.05 mm-thick aligner, respectively. Again, for both aligner thicknesses, the tooth’s center of rotation moved lingually and towards the root direction in lingual inclination, and diagonally from the long axis of the tooth in axial rotation. Taken together, orthodontic treatment for simple malocclusions using transparent aligners of different thicknesses will produce a similar effect on the principal stresses in the periodontal ligament and similar changes in the tooth’s center of rotation, as well as sufficient tooth movement. These findings provide orthodontists and researchers clinical and biomechanical evidence about the effect of transparent aligner thickness selection and its effect on orthodontic treatment.
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Seo, Jeong-Hee, Emmanuel Eghan-Acquah, Min-Seok Kim, Jeong-Hyeon Lee, Yong-Hoon Jeong, Tae-Gon Jung, Mihee Hong, Won-Hyeon Kim, Bongju Kim, and Sung-Jae Lee. "Comparative Analysis of Stress in the Periodontal Ligament and Center of Rotation in the Tooth after Orthodontic Treatment Depending on Clear Aligner Thickness—Finite Element Analysis Study." Materials 14, no. 2 (January 9, 2021): 324. http://dx.doi.org/10.3390/ma14020324.
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Lately, in orthodontic treatments, the use of transparent aligners for the correction of malocclusions has become prominent owing to their intrinsic advantages such as esthetics, comfort, and minimal maintenance. Attempts at improving upon this technology by varying various parameters to investigate the effects on treatments have been carried out by several researchers. Here, we aimed to investigate the biomechanical and clinical effects of aligner thickness on stress distributions in the periodontal ligament and changes in the tooth’s center of rotation. Dental finite element models comprising the cortical and cancellous bones, gingiva, teeth, and nonlinear viscoelastic periodontal ligaments were constructed, validated, and used together with aligner finite element models of different aligner thicknesses to achieve the goal of this study. The finite element analyses were conducted to simulate the actual orthodontic aligner treatment process for the correction of malocclusions by generating pre-stresses in the aligner and allowing the aligner stresses to relax to induce tooth movement. The results of the analyses showed that orthodontic treatment in lingual inclination and axial rotation with a 0.75 mm-thick aligner resulted in 6% and 0.03% higher principal stresses in the periodontal ligament than the same treatment using a 0.05 mm-thick aligner, respectively. Again, for both aligner thicknesses, the tooth’s center of rotation moved lingually and towards the root direction in lingual inclination, and diagonally from the long axis of the tooth in axial rotation. Taken together, orthodontic treatment for simple malocclusions using transparent aligners of different thicknesses will produce a similar effect on the principal stresses in the periodontal ligament and similar changes in the tooth’s center of rotation, as well as sufficient tooth movement. These findings provide orthodontists and researchers clinical and biomechanical evidence about the effect of transparent aligner thickness selection and its effect on orthodontic treatment.
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Elshazly, Tarek M., Ludger Keilig, Yasmine Alkabani, Ahmed Ghoneima, Moosa Abuzayda, Sameh Talaat, and Christoph P. Bourauel. "Primary Evaluation of Shape Recovery of Orthodontic Aligners Fabricated from Shape Memory Polymer (A Typodont Study)." Dentistry Journal 9, no. 3 (March 10, 2021): 31. http://dx.doi.org/10.3390/dj9030031.
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As an innovative approach to overcome the rate-limiting staging of conventional aligners, using shape memory polymers (SMPs) as aligners’ materials was investigated in this in vitro study. The ability of SMPs to shape recover and consequently move tooth, upon appropriate stimuli, was evaluated on a typodont model before clinical application. The study design was to achieve 1.9 mm correction movement of an upper central incisor by one aligner after multiple steps/activation. A custom-made aligned typodont model with a movable upper central incisor was scanned. Using an orthodontic software and a 3D printer, resin-models were generated. Seven aligners of ClearX sheets (SMPs) were fabricated by thermoforming on the resin aligned model. Each aligner was tested for repositioning of the central incisor in the typodont model. The model was scanned after each step and the corrective movement was measured through the superimposition of scans. Results showed that the total correction efficiency of the SMPs’ aligner was ≈93% (1.76 mm). The corrective movement was 0.94 ± 0.04 mm after the reforming step, 0.66 ± 0.07 mm after the first activation step, and 0.15 ± 0.10 mm after the second activation step. It was concluded that aligners made of SMPs could have a promising future-use in orthodontic aesthetic treatment.
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Grigore, Adelina, Camelia Szuhanek, Doina Onisei, and Anghel Cernescu. "A Comparative Study Regarding the Deformation Values of Orthodontic Aligners." Materiale Plastice 54, no. 3 (September 30, 2017): 572–73. http://dx.doi.org/10.37358/mp.17.3.4898.
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Orthodontic therapy using aligners is a modern treatment option among adult patients. In order to have an optimal control of the orthodontic resuslts, there is a need for knowing the deformation values that can appear in each type of aligner, the optimal thickness values of the appliances and the needed number of aligners for each case. The deformation values for a 0.2 mm repositioned lower central incisor were measured with the use of some strain gauges applied at this level, after a manual set-up was manufactured. Different orthodontic forces were applied on each aligner in order to compare the deformation value during the dental correction. The thickness values of the aligners that were used for this study were 0.625 mm, 0.75 mm and 1 mm. The 0.625 mm aligner had the lowest deformation value dueto a high elasticity of the material.
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Yaosen, Chen, A. M. Mohamed, Wang Jinbo, Zheng Ziwei, Maher Al-balaa, and Yang Yan. "Risk Factors of Composite Attachment Loss in Orthodontic Patients during Orthodontic Clear Aligner Therapy: A Prospective Study." BioMed Research International 2021 (January 23, 2021): 1–6. http://dx.doi.org/10.1155/2021/6620377.
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Background. The composite attachment loss during orthodontic clear aligner therapy is an adverse event that commonly happens in our daily practice. However, there is a lack of related statistical analysis and studies analyzing the related risk factors. Therefore, the aim of this study is to assess the incidence of attachment loss during orthodontic clear aligner therapy and to identify rick factors that may predict such event. Materials and Methods. The demographics and clinical variables of 94 patients undergoing clear aligner therapy (27 males and 67 females; average age: 27.60 ± 0.86 years ) were recorded. Both patient-related and tooth-related attachment loss was recorded. The chi-squared test and logistic regressive analysis were applied to identify the potential risk factors. SPSS for Mac (version 23.0, IBM, USA) was used for statistical analyses. P < 0.05 was considered statistically significant. Results. Our study suggested that the risk factors for attachment loss include frequent aligner removal (≥ 5 times a day) ( losing rate = 60.0 % , P = 0.005 ), aligner wear time less than 18 hours a day ( losing rate = 50.8 % , P = 0.014 ), eating without aligners inserted ( losing rate = 47.9 % , P = 0.034 ), utilizing aligner tray seaters ( losing rate = 48.2 % , P = 0.006 ), and unilateral mastication ( losing rate = 52.1 % , P = 0.002 ). The multivariable logistic regression analysis indicates that aligner wear time less than 18 hours a day ( P = 0.020 , B = 0.925 ), using aligner tray seaters ( P = 0.007 , B = 1.168 ), and unilateral mastication ( P = 0.034 , B = − 0.458 ) were considered independent factors that can predict the composite attachment loss in orthodontic clear aligner therapy. Conclusion. Wearing aligner less than 18 hours a day, using aligner tray seaters, and unilateral mastication may contribute to increased incidence of composite attachment loss during orthodontic clear aligner therapy.
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Moon, Chiho, George K. Sándor, Edward Chengchuan Ko, and Yong-Deok Kim. "Postoperative Stability of Patients Undergoing Orthognathic Surgery with Orthodontic Treatment Using Clear Aligners: A Preliminary Study." Applied Sciences 11, no. 23 (November 25, 2021): 11216. http://dx.doi.org/10.3390/app112311216.
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Backgrond: Until now, there have been many studies on the postoperative stability of orthognathic patients treated with traditional fixed orthodontic appliances. Recently, the use of clear aligners as orthodontic appliances has increased in orthodontic treatment for aesthetic and patient convenience. The aim of this preliminary study was to investigate the stability and characteristics of patients undergoing orthognathic surgery using clear aligners. Patients and Methods: This study was performed on patients who underwent orthognathic surgery by one surgeon at Pusan National University Dental Hospital from April 2017 to August 2021. A comparative study was conducted on five patients treated with clear aligners during orthodontic treatment and ten patients treated with traditional fixed appliances as a control group. Postoperative skeletal changes and recurrence were evaluated by cone beam computed tomography and lateral cephalometric radiographs taken two days postoperatively and six months postoperatively. Several measurement variables were used to confirm the presence or absence of recurrence, preoperative and postoperative orthodontic treatment period, and the number of extracted teeth. Results: Postoperative stability for six months after surgery was not significantly different between the clear aligner group and the traditional fixed appliance group. The preoperative orthodontic treatment period was also shorter in the clear aligner group, and the number of extracted premolar teeth and impacted teeth were also fewer in the clear aligner group, but there was no significant difference. Conclusions: Orthodontic treatment using clear aligners continues to develop, and it is believed that there is no limit to what can be accomplished during orthodontic surgery accompanied by clear aligners.
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Drake, Carl T., Susan P. McGorray, Calogero Dolce, Madhu Nair, and Timothy T. Wheeler. "Orthodontic Tooth Movement with Clear Aligners." ISRN Dentistry 2012 (August 14, 2012): 1–7. http://dx.doi.org/10.5402/2012/657973.
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Clear aligners provide a convenient model to measure orthodontic tooth movement (OTM). We examined the role of in vivo aligner material fatigue and subject-specific factors in tooth movement. Fifteen subjects seeking orthodontic treatment at the University of Florida were enrolled. Results were compared with data previously collected from 37 subjects enrolled in a similar protocol. Subjects were followed prospectively for eight weeks. An upper central incisor was programmed to move 0.5 mm. every two weeks using clear aligners. A duplicate aligner was provided for the second week of each cycle. Weekly polyvinyl siloxane (PVS) impressions were taken, and digital models were fabricated to measure OTM. Initial and final cone beam computed tomography (CBCT) images were obtained to characterize OTM. Results were compared to data from a similar protocol, where subjects received a new aligner biweekly. No significant difference was found in the amount of OTM between the two groups, with mean total OTM of 1.11 mm. (standard deviation (SD) 0.30) and 1.07 mm. (SD 0.33) for the weekly aligner and biweekly control groups, respectively (P=0.72). Over eight weeks, in two-week intervals, material fatigue does not play a significant role in the rate or amount of tooth movement.
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Wheeler, Timothy T. "Orthodontic clear aligner treatment." Seminars in Orthodontics 23, no. 1 (March 2017): 83–89. http://dx.doi.org/10.1053/j.sodo.2016.10.009.
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Shipley, Thomas. "Effects of High Frequency Acceleration Device on Aligner Treatment—A Pilot Study." Dentistry Journal 6, no. 3 (July 12, 2018): 32. http://dx.doi.org/10.3390/dj6030032.
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Evaluation of the effect of a high frequency acceleration device (HFA) on clear aligner exchange intervals and treatment time required to achieve prescribed tooth movements. Sixteen subjects with similar Class I malocclusions, ≤5 mm crowding, and treated with aligner orthodontic therapy (Invisalign) were divided into two groups. Group 1 (experimental; n = 8) underwent aligner treatment in conjunction with daily use of the HFA device and exchanged aligners every five days. Group 2 (controls; n = 8) underwent aligner treatment without use of the device and exchanged aligners every 14 days according to the manufacturer’s recommended interval. All subjects were treated by one investigator, and results—total number of aligners used, and number of refinements required—were evaluated by both prior to final mobile retention (Vivera) scan. A significant decrease in both treatment time and number of aligners required to complete treatment was observed by HFA subjects vs. controls. In addition, no refinements were required by HFA subjects, whereas six of eight control subjects required one or more refinements. The results of the present preliminary report showed that the use of the HFA device in conjunction with aligner orthodontic treatment resulted in a significant decrease in the length of treatment. Moreover, the number of patients requiring refining treatment was significantly lower.
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Mantovani, Edoardo, Simone Parrini, Emanuele Coda, Giovanni Cugliari, Nicola Scotti, Damiano Pasqualini, Andrea Deregibus, and Tommaso Castroflorio. "Micro computed tomography evaluation of Invisalign aligner thickness homogeneity." Angle Orthodontist 91, no. 3 (January 21, 2021): 343–48. http://dx.doi.org/10.2319/040820-265.1.
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ABSTRACT Objectives To measure the thickness homogeneity of Invisalign (Align Technology Inc, San José, Calif) aligners with micro-computed tomography (micro-CT) scans. Materials and Methods Starting from micro-CT scanning of 20 different aligners, multiplanar reconstructions were obtained. An orthodontist blinded about the study measured aligner thickness in different regions (molar, canine, incisor) and in different sites (gingival–buccal, buccal, occlusal, lingual, and gingival–lingual). To assess various thicknesses in different aligner sites and regions, the sample was stratified into subgroups and linear regression analysis was performed. Results Descriptive analysis showed that mean thickness of aligners in the incisor region ranged from 0.582 mm to 0.639 mm, in the canine region from 0.569 mm to 0.644 mm, and in the molar region from 0.566 mm to 0.634 mm. Student's t-tests showed no significant differences in the aligner thickness of different regions when data were stratified by different sites. Student's t-tests showed significant differences in thickness homogeneity for the molar region when the data were stratified by tooth (mean difference = 0.068 mm; 95% confidence interval, 0.009–0.126 mm; P = .024). Conclusions Invisalign aligner thickness is characterized by small differences. The only significant difference was revealed in the molar region where thickness of the gingival–lingual edge is significantly thinner than that measured at the occlusal aspect. From a clinical perspective, the results of the present study could be considered to explain the reduced predictability of several orthodontic tooth movements in the molar region.
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Saypeeva, M. M., E. V. Brusnitsyna, E. S. Bimbas, I. V. Gavrilov, T. V. Zakirov, and V. A. Trubina. "Orthodontic treatment with clear aligners and enamel remineralization in adolescents." Pediatric dentistry and dental profilaxis 21, no. 2 (July 17, 2021): 95–102. http://dx.doi.org/10.33925/1683-3031-2021-21-2-95-102.
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Relevance. The effectiveness of the new remineralizing agent PRESIDENT®PROFI REM "MINERALS GEL" was assessed at different stages of clear aligner orthodontic treatment in adolescents with reduced enamel resistance.Materials and methods. PRESIDENT®PROFI REM "MINERALS GEL" was evaluated in a one-month open, single center, non-comparative study where 20 adolescents took part (mean age 14.9 ± 1.1 years).Results. OHI-S decreased by 24.75%, PMA and ERT reduced by 44.33% and 17.11% respectively, after one month of the orthodontic treatment with clear aligners and simultaneous use of the remineralizing gel. The pH in the mixed saliva increased from 6.97 ± 0.16 to 7.69 ± 0.11, calcium went up by 48.5%, and the total antioxidant activity decreased by 29.36% (according to the mixed saliva biochemical parameters). The OHIP-14 questionnaire revealed that the quality of life decreased in 75% of adolescent patients during the orthodontic treatment with aligners due to "communication problems". The quality of life was significantly higher during the aligner treatment with simultaneous remineralizing therapy than during the conventional treatment with fixed appliances (4.25 ± 0.86 points in the aligner group versus 7.05 ± 1.16 points – the brackets group).Conclusions. The remineralizing gel PRESIDENT®PROFI REM "MINERALS GEL" has an anti-plaque and mineralizing effect. The quality of life is significantly higher during the clear aligner treatment with simultaneous remineralizing therapy than during the conventional treatment with fixed appliances.
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Nemec, Michael, Hans Magnus Bartholomaeus, Christian Wehner, Christian Behm, Hassan Ali Shokoohi-Tabrizi, Xiaohui Rausch-Fan, Oleh Andrukhov, and Erwin Jonke. "Behavior of Primary Human Oral Keratinocytes Grown on Invisalign® SmartTrack® Material." Applied Sciences 11, no. 6 (March 22, 2021): 2826. http://dx.doi.org/10.3390/app11062826.
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Orthodontic clear aligner treatment is gaining tremendous popularity. The world market leader is Align Technology® and its product Invisalign®. Although numerous patients are treated with Invisalign® aligners, only little is known about the cellular effects of aligner material on oral epithelial cells. In the present study, we aimed to investigate the effects of SmartTrack® clear aligner material on directly cultured primary human oral keratinocytes (HOKs). Cell morphology and behavior were investigated by scanning electron microscopy and bright field microscopy. Aligner effects on viability were detected by cell-counting-kit (CCK)-8 and live/dead staining. Gene expression of several inflammatory and barrier proteins was assessed by qPCR. Cells cultured on tissue culture plastic served as control. Cell proliferation/viability was significantly lower in cells cultured on aligner material (p < 0.05) in comparison to control. Live/dead staining did not reveal an increase in the number of dead cells on aligner surfaces. After two and seven days of incubation, interleukin (IL)-6 expression decreased, and IL-8 expression increased in HOKs cultured on aligner surfaces. The expression of intercellular adhesion molecule 1 (ICAM-1) significantly decreased after seven days. Gene expression of epithelial barrier markers showed that integrin (ITG)-α6 significantly decreased after two and seven days. A significant decrease in ITG-β4 and E-cadherin expression levels compared to control could only be seen after seven days. We did not find any cytotoxic effect, but alterations in the cell’s barrier functions and inflammatory reaction were obvious. Clinical studies are required to give further insights into clinical reactions on the underlying aligner material of this quickly expanding orthodontic appliance.
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Abay, Feridun, S. Kutalmış Buyuk, and Yasemin Nur Korkmaz. "Prevalence of white spot lesions during clear aligner therapy: a systematic review." Australasian Orthodontic Journal 38, no. 2 (January 1, 2022): 368–79. http://dx.doi.org/10.2478/aoj-2022-0035.
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Abstract Objectives: To determine if an association exists between the prevalence of white spot lesions (WSLs) and orthodontic treatment using clear aligners. Methods: Electronic databases were searched with no restrictions on year. Article selection criteria included human clear aligner studies conducted during the permanent dentition and with a full description of the applied technique and oral hygiene status. Results: The search strategy resulted in a total of 4177 articles. After title and abstract screening, 156 relevant articles were identified from which five remained after the application of the exclusion criteria. The articles were mostly classified as having a low risk of bias. Conclusions: Clear aligner therapy induces a lower development rate of new WSLs than orthodontic treatment by fixed appliances. In patients who have poor oral hygiene and/or existing WSLs, clear aligner treatment could be recommended.
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Adel, Samar, Abbas Zaher, Nadia El Harouni, Adith Venugopal, Pratik Premjani, and Nikhilesh Vaid. "Robotic Applications in Orthodontics: Changing the Face of Contemporary Clinical Care." BioMed Research International 2021 (June 16, 2021): 1–16. http://dx.doi.org/10.1155/2021/9954615.
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The last decade (2010-2021) has witnessed the evolution of robotic applications in orthodontics. This review scopes and analyzes published orthodontic literature in eight different domains: (1) robotic dental assistants; (2) robotics in diagnosis and simulation of orthodontic problems; (3) robotics in orthodontic patient education, teaching, and training; (4) wire bending and customized appliance robotics; (5) nanorobots/microrobots for acceleration of tooth movement and for remote monitoring; (6) robotics in maxillofacial surgeries and implant placement; (7) automated aligner production robotics; and (8) TMD rehabilitative robotics. A total of 1,150 records were searched, of which 124 potentially relevant articles were retrieved in full. 87 studies met the selection criteria following screening and were included in the scoping review. The review found that studies pertaining to arch wire bending and customized appliance robots, simulative robots for diagnosis, and surgical robots have been important areas of research in the last decade (32%, 22%, and 16%). Rehabilitative robots and nanorobots are quite promising and have been considerably reported in the orthodontic literature (13%, 9%). On the other hand, assistive robots, automated aligner production robots, and patient robots need more scientific data to be gathered in the future (1%, 1%, and 6%). Technological readiness of different robotic applications in orthodontics was further assessed. The presented eight domains of robotic technologies were assigned to an estimated technological readiness level according to the information given in the publications. Wire bending robots, TMD robots, nanorobots, and aligner production robots have reached the highest levels of technological readiness: 9; diagnostic robots and patient robots reached level 7, whereas surgical robots and assistive robots reached lower levels of readiness: 4 and 3, respectively.
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Bicakci, Ali Altug, Fatih Çelebi, and Melike Duran. "Comparison of pain perception caused by aligner and conventional fixed orthodontic treatments." IP Indian Journal of Orthodontics and Dentofacial Research 8, no. 4 (December 15, 2022): 231–36. http://dx.doi.org/10.18231/j.ijodr.2022.040.
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The aim of this study was to compare the pain perceived in fixed orthodontic and aligner treatments during the first seven days of treatment. Forty patients who had 3–6 mm maxillary dental crowding and a non-extraction treatment plan were included in this study. The subjects were randomly divided into two groups: the fixed orthodontic group and the aligner group, with ten females and ten males in each. In the fixed orthodontic group, treatment was started with 0.014-inch round nickel-titanium archwire, and a 0.018×0.025-inch preadjusted edgewise appliance was used. In the aligner group, treatment was started with a polyurethane aligner. Throughout the study, teeth in the upper jaw were treated in both groups. The pain scores of the subjects were measured with the visual analog scale at the second and sixth hours and on the first, second, third, and seventh days of treatment. The pain scores of the fixed orthodontic group were significantly higher than those of the aligner group at the sixth hour, on the first, second, and third day. The differences at the second hour and on the seventh day were not statistically significant. According to the study outcomes, less pain was felt during the aligner treatment compared to the fixed orthodontic treatment. However, it should be considered that the force activation interval is shorter in the aligner treatment, and the cumulative pain score may be higher.
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Machado, Ricardo Martins. "Space closure using aligners." Dental Press Journal of Orthodontics 25, no. 4 (August 2020): 85–100. http://dx.doi.org/10.1590/2177-6709.25.4.085-100.sar.
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ABSTRACT Introduction: Due to the search for more aesthetic and comfortable alternatives to perform orthodontic treatments and to the great technological development, orthodontic aligners have assumed great importance. More and more complex treatments have been carried out with these appliances without, however, having all aspects involved in their use being studied in depth. Its biomechanical planning requires different approaches than those used in fixed orthodontics, as the force systems involved in movements, responses and side effects are distinct, and the professional must be prepared when opting for the technique. Objective: The objective of this article is to perform an evaluation of the force systems created on the space closure with aligners, its characteristics, and problems, as well as make some suggestions to overcome the difficulties inherent to its use. Conclusion: Space closure with aligners is possible, but depends on the correct selection of the patient, in addition to requiring the proper planning of the applied forces. The use of auxiliary resources and overcorrections to address the deficiencies of the aligner systems should always be considered. Digital planning should be used as a map of the force systems that will be applied, and not just as a marketing tool, keeping in mind that determining the objectives and the way to achieve them is the responsibility of the orthodontist, and that treatment plans must be individualized for each situation, following appropriate biomechanical precepts.
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Kilaru, Kalpana. "A critique on Materials for Orthodontic Aligners through sustainable Manufacturing." E3S Web of Conferences 309 (2021): 01035. http://dx.doi.org/10.1051/e3sconf/202130901035.
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Materials will play an important role in any manufacturing sector. Additive manufacturing is the one of the most Emerging Manufacturing technology which is adding a sustainable dimension to Human life by using bio medical dental aligners in orthodontics. The new presentation of Sustainable manufacturing is upsetting endodontist, furthermore, it is in any event, it is applied to dental treatment of poor alignment of teeth and jaws. Exact, customized, Detachable aligners are an appropriate option in contrast to ordinary orthodontic machines, offering a more agreeable furthermore, and productive answer for patients Simultaneously, Detachable Clips are created by a thermoset’s interaction utilizing different sorts of thermoset elements. The Elastomer system modifies the Characteristics of the element, and the intra oral climate moreover changes the characteristic of an unmistakable clip, influencing execution of the element. The current audit recommends the appropriateness of Additive manufactured aligners is better than that of thermoset made aligners due to earlier expanded precision, load obstruction, and lower twisting. It is a general steadier approach to produce an aligner where sub millimetre developments can have an effect in treatment result. Direct 3D printing addresses an intricate strategy to command the density of the aligner and in this manner has superior capacity to command the power angle that are utilized to create teeth development. There is presently no other endorsed material available that can make this.
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Borda, Alissa F., Judah S. Garfinkle, David A. Covell, Mansen Wang, Larry Doyle, and Christine M. Sedgley. "Outcome assessment of orthodontic clear aligner vs fixed appliance treatment in a teenage population with mild malocclusions." Angle Orthodontist 90, no. 4 (April 28, 2020): 485–90. http://dx.doi.org/10.2319/122919-844.1.
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ABSTRACT Objective To assess the efficacy and efficiency of treatment in adolescents presenting with mild malocclusions, comparing outcomes using clear aligners to fixed appliances. Materials and Methods Patients identified retrospectively and consecutively from one private practice had been treated with either clear aligners (Invisalign, Align Technology, Santa Clara, Calif) or fixed appliances (0.022 Damon, Ormco, Orange, Calif; n = 26/group). Assessments of occlusion were made using the American Board of Orthodontics Discrepancy Index (DI) for initial records and Cast-Radiograph Evaluation (CRE) for final records. Number of appointments, number of emergency visits, and overall treatment time were determined from chart reviews. Data were analyzed using Pearson's correlation, Wilcoxon rank tests, unpaired t-tests, and Chi-square tests, with significance set to P ≤ .05. Results Pretreatment, the aligner and fixed groups showed no significant difference in overall severity (DI: 11.9 ± 5.3 vs 11.6 ± 4.8) or in any individual DI category. Posttreatment scores showed finishes for the aligner group had fewer discrepancies from ideal relative to the fixed appliance group (CRE: 30.1 ± 8.3 vs 37.0 ± 9.3; P < .01). Patients treated with aligners had fewer appointments (13.7 ± 4.4 vs 19.3 ± 3.6; P < .0001), fewer emergency visits (0.8 ± 1.0 vs 3.6 ± 2.5; P < .0001), and shorter overall treatment time (16.9 ± 5.7 vs 23.4 ± 4.4 months; P < .0001). Conclusions Outcomes for treatment of mild malocclusions in adolescents showed equivalent effectiveness of clear aligners compared to fixed appliances, with significantly improved results for clear aligner treatment in terms of tooth alignment, occlusal relations, and overjet. Assessment of the number of appointments, number of emergency visits, and overall treatment time showed better outcomes for treatment with clear aligners.
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Juneja, Mamta, Prashant Jindal, Divya Bajaj, Ishan Madhav, and Rakesh Tuli. "Methodology for Stress Measurement by Transparent Dental Aligners using Strain Gauge." World Journal of Dentistry 9, no. 1 (2018): 13–18. http://dx.doi.org/10.5005/jp-journals-10015-1499.
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ABSTRACT Aim Orthodontic tooth movement is a pressing issue nowadays. An increased esthetic demand during orthodontic treatment has resulted in several alternative treatments. However, the need to avoid conventional fixed orthodontic prosthesis has led to the usage of computer-aided scanning, imaging, and printing technology along with the emergence of transparent dental aligners. The motive of this study is to present methodology of measurement of the stress applied by transparent dental aligners on human teeth using a strain gauge-based measurement device. Materials and methods Three dimensional (3D) scanner, 3D printer, thermoforming machine, strain gauge, data acquisition device, 3Shape Ortho Analyzer software were used. Results For a full-bridge Wheatstone bridge data acquisition system (DAQ), a standard aligner can strain a constantan-based strain gauge by nearly 2.5 × 10—4. This is based on the strain gauge factor of 2, input voltage 5 V for which a change in voltage of 2.5 mV was detected. Young's modulus for constantan strain gauge is given as 17.5 MPa; hence, this produced a stress of nearly 4.38 × 10—3 MPa. Conclusion This article describes an effective and convenient methodology for orthodontic treatment design for patients with crowding problem using computer-aided design (CAD) and computer-aided manufacturing (CAM) software and, thereafter, printing different stages of maxilla and mandible using fused deposition modeling (FDM) rapid prototyping technique. A transparent aligner is fabricated using thermoforming process, and the applied stresses on manipulated teeth by aligner can be evaluated using a strain gauge-based DAQ. Clinical significance This approach is expected to understand the efficacy of the thermoformed aligners for teeth movements by calculating applied forces and stresses. How to cite this article Bajaj D, Madhav I, Juneja M, Tuli R, Jindal P. Methodology for Stress Measurement by Transparent Dental Aligners using Strain Gauge. World J Dent 2018;9(1):13-18.
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Tartaglia, Gianluca M., Andrea Mapelli, Cinzia Maspero, Tommaso Santaniello, Marco Serafin, Marco Farronato, and Alberto Caprioglio. "Direct 3D Printing of Clear Orthodontic Aligners: Current State and Future Possibilities." Materials 14, no. 7 (April 5, 2021): 1799. http://dx.doi.org/10.3390/ma14071799.
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The recent introduction of three-dimensional (3D) printing is revolutionizing dentistry and is even being applied to orthodontic treatment of malocclusion. Clear, personalized, removable aligners are a suitable alternative to conventional orthodontic appliances, offering a more comfortable and efficient solution for patients. Including improved oral hygiene and aesthetics during treatment. Contemporarily, clear aligners are produced by a thermoforming process using various types of thermoplastic materials. The thermoforming procedure alters the properties of the material, and the intraoral environment further modifies the properties of a clear aligner, affecting overall performance of the material. Direct 3D printing offers the creation of highly precise clear aligners with soft edges, digitally designed and identically reproduced for an entire set of treatment aligners; offering a better fit, higher efficacy, and reproducibility. Despite the known benefits of 3D printing and the popularity of its dental applications, very limited technical and clinical data are available in the literature about directly printed clear aligners. The present article discusses the advantages of 3D printed aligners in comparison to thermoformed ones, describes the current state of the art, including a discussion of the possible road blocks that exist such as a current lack of approved and marketed materials and limited existence of aligner specific software. The present review suggests the suitability of 3D direct printed aligners is superior to that of thermoformed manufactured aligners because of the prior’s increased accuracy, load resistance, and lower deformation. It is an overall more stable way to produce an aligner where submillimeter movements can make a difference in treatment outcome. Direct 3D printing represents a complex method to control the thickness of the aligner and therefore has a better ability to control the force vectors that are used to produce tooth movement. There is currently no other approved material on the market that can do this. The conclusion of this article is that we encourage further in vitro and in vivo studies to test these new technologies and materials.
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Kafle, Dashrath, Ravi Kumar Mahato, Abhisek Giri, Sanjiv Luintel, and Arjun Karki. "Treatment of generalized spacing with clear aligner therapy: Report of a case." Orthodontic Journal of Nepal 11, no. 2 (December 31, 2021): 67–71. http://dx.doi.org/10.3126/ojn.v11i2.43281.
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Clear Aligners are becoming popular among patients in recent years because of its invisible nature , comfort to wear, less orthodontic emergencies and better hygiene control. However proper case selection is vital for the success. With the better understanding of aligner biomechanics and improvement in aligner materials and attachment design, more complex teeth movement is also possible with clear aligners. As there is always controversy on whether aligners cause tipping or bodily tooth movement, In this case report, a skeletal class I patient with generalized spacing in maxilla and mandible is presented which is treated effectively by bodily movement of incisors.
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Warnecki, Maciej, Michał Sarul, Marcin Kozakiewicz, Anna Zięty, Bartosz Babiarczuk, Beata Kawala, and Kamil Jurczyszyn. "Surface Evaluation of Aligners after Immersion in Coca-Cola and Orange Juice." Materials 15, no. 18 (September 13, 2022): 6341. http://dx.doi.org/10.3390/ma15186341.
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Orthodontic removable appliances made of transparent thermoplastic materials—aligners—are becoming increasingly popular in contemporary orthodontic practice. It is important for the clinician to fully understand the mechanical properties and behavior of the appliance used. Because of that, the aim of our study was to investigate the changes in aligner surface after immersion in Coca-Cola and orange juice. For surface evaluation, fractal analysis, texture analysis, and wetting angle measurement were performed. Statistically significant changes were found between some of the groups in the fractal dimension analysis. In texture analysis, all but one intergroup comparison showed statistically significant differences. For wetting angle assessment, statistically significant differences were found. These were, however, more numerous when assessing glycol droplets, rather than water droplets. Fractal dimension analysis confirmed a correlation between the intensity of changes in the aligner surface with immersion time in the liquids assessed. Texture analysis showed a high sensitivity to the changes in aligner surface. It failed, however, to reveal changes relative to immersion time. Wetting angle analysis revealed aligner surface degradation for Coca-Cola. It did not, however, prove the dependence of the intensity of this degradation as a function of time. Both Coca-Cola and orange juice can cause aligner surface degradation.
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Bichu, Yashodhan M., Abdulraheem Alwafi, Xiaomo Liu, James Andrews, Björn Ludwig, Aditi Y. Bichu, and Bingshuang Zou. "Advances in orthodontic clear aligner materials." Bioactive Materials 22 (April 2023): 384–403. http://dx.doi.org/10.1016/j.bioactmat.2022.10.006.
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Mampieri, Gianluca, Roberta Condò, Giovanni Di Caccamo, Paola Pirelli, and Aldo Giancotti. "Clear Aligner Treatments in Orthoperio Patients." Case Reports in Dentistry 2022 (February 14, 2022): 1–17. http://dx.doi.org/10.1155/2022/8932770.
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Introduction. Orthodontic treatment is a recognized approach to support specific periodontal issues thanks to its capability to manipulate periodontal tissues. This concept is certainly not new, but the use of aligners in certain clinical conditions can be considered as being innovative when a multidisciplinary treatment is necessary. Moreover, aligners enable to plan 3D tooth movements, root placement, staging, and range of dental movements, alongside the improvement of oral hygiene. Thus, aligners can be suitable for the treatment of periodontal issues. In this article, the authors present two clinical cases with different periodontal issues: one with superficial periodontal problems and the other with a deep one. Both cases were successfully treated with aligners, highlighting how this invisible and comfortable tool can simplify the management of complex adult treatments. Conclusion. Digital workflow is the key for success in the aligner technique. The possibility to design a virtual plan of treatment and to transfer it in the real clinical world represents a way to limit errors and to reduce the time of orthodontic therapy.
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Caruso, Silvia, Atanaz Darvizeh, Stefano Zema, Roberto Gatto, and Alessandro Nota. "Management of a Facilitated Aesthetic Orthodontic Treatment with Clear Aligners and Minimally Invasive Corticotomy." Dentistry Journal 8, no. 1 (February 15, 2020): 19. http://dx.doi.org/10.3390/dj8010019.
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Accelerating orthodontic tooth movement has become a topical issue and the corticotomy seems to be the only effective and safe technique reported in the literature. Simultaneously, aesthetic orthodontic treatment with removable clear aligners has become commonly requested. The aim of this paper is to illustrate the management of facilitated aesthetic orthodontic treatment, a combined approach including piezocision corticotomy and clear aligners for orthodontic treatment. Orthodontic planning for traditional clear aligners should be modified to take advantage of the corticotomy technique in order to facilitate the most difficult orthodontic movements needed to achieve treatment completion, where each aligner will be used for four days rather than 15 days for a total time of four months. A corticotomy with a modified minimally invasive flapless piezocision technique should be performed in both jaws at the same time, before the time window of the orthodontic treatment, where the most difficult orthodontic movements are planned. Treatment planning where difficult orthodontic movements, such as anterior open-bite closure and extraction space closure, are easily managed with clear aligners and are presented as examples of facilitated aesthetic orthodontic treatment application. The combination between aesthetic treatment with clear aligners and modified piezocision corticotomy, if carefully planned, seems to represent a synergy that achieves the current goals of orthodontic treatment. The primary objectives of this combination should be facilitating difficult orthodontic movements and reducing treatment duration.
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Collins, Megan, Darwin Luc, Ersan Karadeniz, Peter Petocz, Carlos Flores-Mir, and Carmen Karadeniz. "The appeal of ‘Do It Yourself’ orthodontic aligners: A YouTube analysis." Australasian Orthodontic Journal 37, no. 2 (January 1, 2021): 321–32. http://dx.doi.org/10.21307/aoj-2021.036.
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Abstract Objective: The present study aimed to determine how the popularity of ‘Do It Yourself’ (DIY) aligner videos available on YouTube relates to authorship, video content, quality and reliability, and to determine why DIY aligners appeal to consumers. Methods: The Google Trends website was interrogated to identify the most frequently used search terms regarding DIY aligners which were subsequently applied to a search of the YouTube website. One hundred twenty-three videos were assessed for completeness of content, reliability (using a modified version of the DISCERN tool) and quality using the Global Quality Score (GQS). The relationship between the variables and authorship, popularity, financial interest, and recommendations were assessed using Pearson Correlation Coefficients. Results: Laypeople produced the majority of the videos (73%). Dentists/Orthodontists uploaded only 4% of the videos, and dental professional bodies uploaded none. Most videos (86%) were content poor, unreliable (average DISCERN score of 1) and of low quality (average GQS of 2). The more popular, reliable and superior the quality of the video, the greater the number of views, likes and viewing rate (p < 0.05). Conversely, authors with a financial interest and lower quality and less reliable videos were more likely to recommend DIY aligners. Consumers sought DIY aligner treatment due to a reduced cost. Conclusions: YouTube should not be considered as a viable nor reliable source of DIY aligner information for patients or the public. Dentists/Orthodontists should be encouraged to publish comprehensive and more informative YouTube content related to DIY aligners.
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Chami, Vitória de Oliveira, Livia Nunes, and Jonas Capelli Júnior. "Expression of cytokines in gingival crevicular fluid associated with tooth movement induced by aligners: a pilot study." Dental Press Journal of Orthodontics 23, no. 5 (October 2018): 41–46. http://dx.doi.org/10.1590/2177-6709.23.5.041-046.oar.
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ABSTRACT Introduction: The search for more aesthetic and comfortable orthodontic devices has led to an increase in the use of clear aligners. Objective: To increase knowledge on biological mechanisms of orthodontic tooth movement using Invisalign aligners. Methods: This study included 11 patients with a mean age of 23.6 ± 4.8 years. Cases planning included alignment and leveling of lower incisors using Invisalign aligners. Gingival crevicular fluid samples were collected from the lower incisors on the day of delivery of aligner number 1 (T0) and after 1 (T24h), 7 (T7d), and 21 (T21d) days. During the observation period of the study, the patients used only the aligner number 1. Levels of nine cytokines were quantified using Luminex’s multi-analysis technology. Non-parametric tests were used for comparisons between cytokine expression levels over time. Results: Cytokine expression levels remained constant after 21 days of orthodontic activation, except those of MIP-1β, which presented a statistical difference between T24h and T21d with a decrease in the concentration levels. IL-8, GM-CSF, IL-1β, MIP-1β, and TNF-α showed the highest concentrations over time. Conclusions: The different behavior in the levels of the investigated cytokines indicates a role of these biomarkers in the tissue remodeling induced by Invisalign.
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Khan, Mahamad Irfanulla, Laxmikanth SM, Tarika Gopal, and Praveen Kumar Neela. "Artificial intelligence and 3D printing technology in orthodontics: future and scope." AIMS Biophysics 9, no. 3 (2022): 182–97. http://dx.doi.org/10.3934/biophy.2022016.
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<abstract> <p>New digital technologies, like in other fields, have revolutionized the health care field and orthodontic practice in the 21<sup>st</sup> century. They can assist the health care professionals in working more efficiently by saving time and improving patient care. Recent advances in artificial intelligence (AI) and 3D printing technology are useful for improving diagnosis and treatment planning, creating algorithms and manufacturing customized orthodontic appliances. AI accomplishes the task of human beings with the help of machines and technology. In orthodontics, AI-based models have been used for diagnosis, treatment planning, clinical decision-making and prognosis prediction. It minimizes the required workforce and speeds up the diagnosis and treatment procedure. In addition, the 3D printing technology is used to fabricate study models, clear aligner models, surgical guides for inserting mini-implants, clear aligners, lingual appliances, wires components for removable appliances and occlusal splints. This paper is a review of the future and scope of AI and 3D printing technology in orthodontics.</p> </abstract>
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Ash, Simon. "A chrome cobalt mandibular advancement appliance for snoring and obstructive sleep apnoea used during active aligner orthodontic treatment." Journal of Orthodontics 47, no. 2 (April 27, 2020): 181–84. http://dx.doi.org/10.1177/1465312520914300.
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Adult orthodontics is now mainstream, made all the more acceptable by the advent of removable aligners. These patients may also coincidentally suffer from snoring and obstructive sleep apnoea (OSA), for which the indefinite wearing of a mandibular advancement device (MAD) during sleep may be required. Indefinite removable nocturnal orthodontic retention is now established practice. This case report describes a cast chrome cobalt MAD and its application in the management of a patient who, having very successfully managed his snoring and mild OSA with a removable cast chrome cobalt MAD, wished to continue this management while undergoing active orthodontic treatment using removable aligners. He also wished to wear a chrome cobalt MAD to incorporate orthodontic retention and inter occlusal splinting as part of his MAD on completion of his active orthodontic treatment.
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Cooper-Kazaz, Rena, Inbal Ivgi, Laura Canetti, Eytan Bachar, Boaz Tsur, Stella Chaushu, and Miriam Shalish. "The impact of personality on adult patients' adjustability to orthodontic appliances." Angle Orthodontist 83, no. 1 (May 11, 2012): 76–82. http://dx.doi.org/10.2319/010312-6.1.
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Abstract Objective: To evaluate the impact of psychological traits on patients' choice of orthodontic appliances and their adjustability to orthodontic treatment. Materials and Methods: The sample consisted of 68 adult patients divided into three groups (28 buccal, 19 lingual, and 21 clear aligners). Prior to treatment participants filled out the Brief Symptom Inventory to assess symptoms of mental distress and the Narcissistic Vulnerability Scale to assess narcissistic personality traits. During the first week after appliance delivery and on day 14, patients completed a Health-Related Quality of Life questionnaire to assess their perception of pain and four areas of dysfunction. The correlation between personality traits and patients' reaction to treatment was evaluated. Results: Somatization was the only trait that affected the choice of lingual and clear aligner appliance. Reduced self-esteem regulation was associated with increased pain in all patients, while exploitation was associated with pain in lingual patients. Narcissistic vulnerability slightly influenced patients' adaptability to orthodontic appliances. Although adjustability to lingual appliances was the most difficult, only two parameters were affected by personality features. In the buccal group, adjustability was affected by numerous parameters. Adaptation to the clear aligner appliance was relatively uneventful and least affected by psychological features. Conclusion: Anxious individuals tend to prefer lingual and clear aligner appliances. The selection of lingual and clear aligner appliances governs the patient's response and recovery process, leaving little room for the effect of psychological features. On the other hand, the buccal appliance allows for greater impact of personality traits on adjustability.
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Tao, Tianjin, Hengyan Liang, Xinyu Yan, Qi Fan, Qingsong Jiang, Fan Jian, Hu Long, and Wenli Lai. "Comparison of Root Parallelism in Extraction Cases Treated with Clear Aligners vs. Fixed Appliances." Applied Sciences 12, no. 22 (November 18, 2022): 11756. http://dx.doi.org/10.3390/app122211756.
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In the process of orthodontic treatment, root parallelism is related to the relapse of extraction spaces, black triangles, and periodontal health. However, there are few studies on root parallelism in extraction cases with different types of appliances. The objective was to compare the root parallelism in extraction cases treated with clear aligners vs. those treated with fixed appliances by measuring the differences per extraction site and to access the root-movement control capacity of both orthodontic appliances. A retrospective study was conducted on cases in which the first premolars were extracted, treated by clear aligner appliance (“Invisalign” system, 28 patients) or fixed appliance (30 patients). The angulations of the tooth axis (canines, the second premolars, the first molars, and the second molars) were measured to analyze and compare the difference in root parallelism between the two orthodontic appliances. The percentage of root parallelism between the canine and second premolar in both groups had no significant difference. However, judging from the average angle difference value, the fixed appliance might have a greater range in root angulation adjustment than the aligner. In the angulation categories, the aligner mainly showed root apical divergence, while the fixed appliance mainly showed root apical convergence. The dental crown of the molars was mainly non-tipping in both groups, but it could be observed that the dental crown of the maxillary molars had a tendency toward mesial inclination. In conclusion, the same root parallelism and root inclination were obtained in tooth extraction cases whether treated by clear aligners or fixed appliances. This study provides clinicians with more information on the performance of clear aligners and fixed appliances.
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Cortona, Andrea, Gabriele Rossini, Simone Parrini, Andrea Deregibus, and Tommaso Castroflorio. "Clear aligner orthodontic therapy of rotated mandibular round-shaped teeth: A finite element study." Angle Orthodontist 90, no. 2 (August 30, 2019): 247–54. http://dx.doi.org/10.2319/020719-86.1.
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ABSTRACT Objective: To evaluate, using the finite element method, the orthodontic rotational movement of a lower second premolar obtained with clear aligners, analyzing different staging and attachment configurations. Materials and Methods: A CAD model including a complete lower dental arch (with element 4.5 mesially rotated 30°) and the corresponding periodontal ligaments, attachments, and aligner was designed and imported to finite element software. Starting from the CAD model, six projects were created to simulate the following therapeutic combinations for correcting element 4.5 position: (1) without attachments, (2) single attachment placed on the buccal surface of element 4.5, (3) three attachments placed on the buccal surfaces of teeth 4.4 to 4.6. For each project, both 1.2° and 3° of aligner activation were considered. Results: All the analyzed configurations revealed a clockwise rotation movement of element 4.5 on the horizontal plane. Models with attachments showed a greater tooth displacement pattern than models without attachments. Simulations with attachments and 3° of aligner activation exhibited the best performance concerning tooth movement but registered high stresses in the periodontal ligaments, far from the ideal stress levels able to produce tooth rotational movement. Conclusions: The model with a single attachment and 1.2° of aligner activation was the most efficient, followed by the three attachment model with the same degree of activation. Aligner activation should not exceed 1.2° to achieve better control of movement and reasonable stress in periodontal structures.
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Nguyen, Minh Truong, Tien Thuy Vu, and Quang Ngoc Nguyen. "Advanced Digital 3D Technology in the Combined Surgery-First Orthognathic and Clear Aligner Orthodontic Therapy for Dentofacial Deformity Treatment." Processes 9, no. 9 (September 8, 2021): 1609. http://dx.doi.org/10.3390/pr9091609.
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Orthognathic surgery and orthodontic treatment are required for patients with dentofacial deformities to obtain an ideal facial esthetic with good functioning. Recently, characterized by the surgery-first approach, an integrated orthodontic–surgical treatment has been introduced as an emerging solution to dentofacial deformity treatment. The surgery-first approach is regarded to have less treatment time and quicker enhancement of a facial profile than the conventional orthodontic–surgical treatment. Moreover, the recent advances in computing and imaging have allowed the adoption of 3-dimensional (3D) virtual planning protocols in orthognathic surgery as well as digital orthodontic treatment, which enables a paradigm shift when realizing virtual planning properly. These techniques then allow the surgeon and orthodontist to collaborate, plan, and simulate the dentofacial deformity treatment before performing the whole procedure. Along this line, in this research article, we present an integrated treatment method for the realization of an effective deformity treatment. Specifically, we implemented the integrated 3D technique by combining it with the surgery-first orthognathic approach (SFOA) as a novel treatment method for the patients. The outcomes from the combined treatments of the patients with dentofacial deformity, in practice, have demonstrated that our proposed 3D technique in orthognathics and orthodontics using clear aligner therapy (e.g., Invisalign) can enhance the satisfactory level of the patient since the start of treatment then improve their quality of life. As a result, the combined techniques realize the novel integrated treatment method using 3D technology with the use of 3D imaging and modeling as a promising development trend of dentistry, which fits into the context of Dentistry 4.0 as a key enabler to the concept of sustainable dentistry development.
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Kirlys, Robertas, Rugilė Nedzinskaitė, Roberto Rongo, Marco Severino, Algirdas Puisys, and Vincenzo D’Antò. "Digital Planning Technique for Surgical Guides for Prosthetic Implants before Orthodontic Treatment." Applied Sciences 12, no. 11 (May 30, 2022): 5566. http://dx.doi.org/10.3390/app12115566.
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Background: The use of digitalization allows clinicians to plan the position of dental implants in orthodontic patients treated with aligners in the beginning of their orthodontic treatment, instead of waiting until the end of orthodontic treatment, integrating implant restorations with orthodontic biomechanics. Aim: The aim of this case report is to describe a digital workflow for aligner treatment supported by implants, in which implants are placed at the beginning of the treatment and support the orthodontic treatment. Materials and Methods: Digital planning for orthodontic treatment with clear aligners and the preparation of surgical guides for implant surgery before orthodontic treatment are used to solve two multidisciplinary cases. Cone-beam computed tomography (CBCT) and virtual dental impressions are used for the virtual planning. Successively, a surgical guide for implant placement and aligners are used in the treatment plan. Results: The digital orthodontic setup with the integration of the root position allows the clinician to plan the position of dental implants on the final occlusion. The placement of the implant before the start of the orthodontic treatment allows the implants to be used as skeletal anchorage, thereby helping the orthodontic biomechanics. Conclusions: This study describes how to perform a digital workflow with orthodontic virtual planning and the design of surgical guides for implant placement. This technique is potentially promising for complex orthodontic cases.
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Inoue, Sayuri, Satoshi Yamaguchi, Hiroshi Uyama, Takashi Yamashiro, and Satoshi Imazato. "Orthodontic Aligner Incorporating Eucommia ulmoides Exerts Low Continuous Force: In Vitro Study." Materials 13, no. 18 (September 14, 2020): 4085. http://dx.doi.org/10.3390/ma13184085.
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The aim of this study was to investigate the orthodontic force exerted by thermoplastic orthodontic appliances incorporating Eucommiaulmoides in terms of usefulness as the aligner-type orthodontic device. Erkodur, Essix C+®, Eucommia elastomer, and edgewise brackets were used (n = 3, each; thickness = 1.0 mm, each). The orthodontic force on the upper right incisor was measured every 24 h for two weeks using a custom-made measuring device. The force of the Eucommia elastomer (4.25 ± 0.274 N) and multi bracket system (5.32 ± 0.338 N) did not change from the beginning to the end (p > 0.01). The orthodontic force exerted by the Eucommia elastomer was lower than that of the multi-bracket orthodontic appliance from the beginning to the end. The force of Erkodur significantly decreased from the beginning to 24 h (6.47 ± 1.40 N) and 48 h (3.30 ± 0.536 N) (p < 0.01). The force of Essix C+® significantly decreased from the beginning (13.2 ± 0.845 N) to 24 h (8.77 ± 0.231 N) (p < 0.01). The thermoplastic orthodontic appliance made of Eucommia elastomer continuously exerted a constant orthodontic force for two weeks under water immersion conditions. The orthodontic force of Eucommia elastomer was found to be similar to the orthodontic force exerted by the multi-bracket orthodontic appliance with 0.019 × 0.025 in nickel–titanium wire. These results suggest that the Eucommia elastomer has possibly become one of the more useful materials to form thermoplastic orthodontic appliance exerting low continues orthodontic force.
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Lombardo, Luca, Elisa Martines, Valentina Mazzanti, Angela Arreghini, Francesco Mollica, and Giuseppe Siciliani. "Stress relaxation properties of four orthodontic aligner materials: A 24-hour in vitro study." Angle Orthodontist 87, no. 1 (January 1, 2016): 11–18. http://dx.doi.org/10.2319/113015-813.1.
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ABSTRACT Objective: To investigate the stress release properties of four thermoplastic materials used to make orthodontic aligners when subjected to 24 consecutive hours of deflection. Materials and Methods: Four types of aligner materials (two single and two double layered) were selected. After initial yield strength testing to characterize the materials, each sample was subjected to a constant load for 24 hours in a moist, temperature-regulated environment, and the stress release over time was measured. The test was performed three times on each type of material. Results: All polymers analyzed released a significant amount of stress during the 24-hour period. Stress release was greater during the first 8 hours, reaching a plateau that generally remained constant. The single-layer materials, F22 Aligner polyurethane (Sweden & Martina, Due Carrare, Padova, Italy) and Duran polyethylene terephthalate glycol-modified (SCHEU, Iserlohn, Germany), exhibited the greatest values for both absolute stress and stress decay speed. The double-layer materials, Erkoloc-Pro (Erkodent, Pfalzgrafenweiler, Germany) and Durasoft (SCHEU), exhibited very constant stress release, but at absolute values up to four times lower than the single-layer samples tested. Conclusions: Orthodontic aligner performance is strongly influenced by the material of their construction. Stress release, which may exceed 50% of the initial stress value in the early hours of wear, may cause significant changes in the behavior of the polymers at 24 hours from the application of orthodontic loads, which may influence programmed tooth movement.
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Grünheid, Thorsten, Sara Gaalaas, Hani Hamdan, and Brent E. Larson. "Effect of clear aligner therapy on the buccolingual inclination of mandibular canines and the intercanine distance." Angle Orthodontist 86, no. 1 (May 22, 2015): 10–16. http://dx.doi.org/10.2319/012615-59.1.
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ABSTRACT Objective: To compare the changes in buccolinugal inclination of mandibular canines and intercanine distance in patients treated with clear aligners to those treated with preadjusted edgewise appliances. Materials and Methods: The buccolingual inclination of mandibular canines and the intercanine distance were measured on pre- and posttreatment cone-beam computed tomograms of 30 patients who had been treated with clear aligners and 30 patients who had been treated with fixed preadjusted edgewise appliances. Differences between the aligner and fixed appliance groups and between pre- and posttreatment measurements were tested for statistical significance. Results: In both groups, most of the mandibular canines had positive buccolingual inclinations (ie, their crowns were positioned lateral to their roots) both before and after treatment. While there was no difference between the groups pretreatment, the posttreatment buccolingual inclination was significantly greater in the aligner group. In the fixed appliance group, the canines became more upright with treatment, while the buccolingual inclination did not change significantly in the clear aligner group. The intercanine distance did not differ between the groups either before or after treatment. However, it increased significantly over the course of treatment in the aligner group, whereas it did not change significantly in the fixed appliance group. Conclusions: Orthodontic treatment with clear aligners tends to increase the mandibular intercanine distance with little change in inclination in contrast to treatment with fixed appliances, which leaves the intercanine distance unchanged but leads to more upright mandibular canines.
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Retrouvey, Jean-Marc. "The role of AI and machine learning in contemporary orthodontics." APOS Trends in Orthodontics 11 (April 10, 2021): 74–80. http://dx.doi.org/10.25259/apos_148_2020.
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In the past 20 years, the orthodontic profession has adopted digital technologies such as computer-assisted tooth movement, automated staged dental aligner production, and 3D simulations. Until recently, the use of artificial intelligence (AI) was limited to narrow intelligence and supervised “learning” such as automated cephalometric point recognition, segmentation of teeth from 3D files, and staging of orthodontic treatment. The next step will be to create neural networks based on general intelligence (the human intelligence is considered general intelligence), where the network using powerful computers and complex algorithms will “learn” orthodontic diagnosis and treatment planning to suggest the most appropriate treatment plan for optimized treatments and more predictable outcomes. The objectives of this paper are to describe the state of the art in AI and orthodontics and explore potential avenues for future developments and applications.
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Meto, Aida, Bruna Colombari, Anna Castagnoli, Mario Sarti, Lucia Denti, and Elisabetta Blasi. "Efficacy of a Copper–Calcium–Hydroxide Solution in Reducing Microbial Plaque on Orthodontic Clear Aligners: A Case Report." European Journal of Dentistry 13, no. 03 (July 2019): 478–84. http://dx.doi.org/10.1055/s-0039-1695653.
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AbstractThe aim of this study was to investigate the ability of a copper–calcium–hydroxide-based compound to remove microbial plaque naturally produced onto orthodontic clear aligners. A commercially available dental paste, named Cupral, based on copper–calcium–hydroxide, was used. A healthy volunteer (female, 32 years old), undergoing orthodontic treatment with thermoplastic clear aligners was enrolled. By conventional/confocal microscopy and colony-forming unit (CFU) assay, 2-week used aligners were examined for microbial plaque, prior and following exposure to Cupral. Confocal microscopy revealed abundant plaque irregularly distributed onto the aligner surface. Following Cupral treatment, a drastic decrease occurred in plaque thickness and matrix presence. As assessed by the CFU assay, total microbial load approached 109 CFUs/aligner, with slight differences in aerobiosis and anaerobiosis culture conditions; six macroscopically different types of colonies were detected and identified by matrix-assisted laser desorption ionization-time of flight mass spectrometry. Following Cupral treatment, microbial load dropped to undetectable levels, irrespectively of the conditions considered. Exposure of clear aligners to Cupral results in the elimination of contaminating microorganisms; the antimicrobial activity is retained up to 1.25% concentration. Overall, our data describe a novel use of Cupral, a copper–calcium–hydroxide-based compound, in daily hygiene practices with promising results.
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Agrawal, Miral, Shefali Sharma, and Parmeshwari Rathod. "Periodontally Accelerated Osteogenic Orthodontics (PAOO) vs Osteoperforations (A Review on Periodontal Reactions to Orthodontic Tooth Movement)." Academic Journal of Research and Scientific Publishing 3, no. 32 (December 5, 2021): 36–51. http://dx.doi.org/10.52132/ajrsp.e.2021.32.2.
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A high number of adult patients are undertaking orthodontic treatment now because of the newer methods, technology, and innovations available in the market. Orthodontic profession is continually looking for new ways to perform treatment effectively for such patients, as there are many differences in the biology, motivation, and treatment objectives between adults and children. Aligner therapy and mini-implants are some of the ways of managing orthodontic treatment for adult patients. Treatment time is a concern for adult patients and methods to accelerate the orthodontic tooth movement have been a focus in the orthodontic field. Periodontal accelerated osteogenic orthodontics (PAOO) is a surgical procedure that is performed with a combination of alveolar corticotomy, bone grafting, followed by orthodontic treatment. This procedure uses the principle of regional acceleratory phenomenon (RAP). Another procedure commonly used for accelerated orthodontic tooth movement is osteoperforations. This is a minimally invasive procedure, which does not include a flap surgery. The purpose of this article is to describe the differences between adult and children periodontal tissues, the use of different appliances for adult treatment, how orthodontic treatment has been modified for adult patients, and the detailed explanation of procedures for accelerating orthodontic tooth movement such as PAOO and osteoperforations and the potential complications
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Hong, Kyungjae, Won-Hyeon Kim, Emmanuel Eghan-Acquah, Jong-Ho Lee, Bu-Kyu Lee, and Bongju Kim. "Efficient Design of a Clear Aligner Attachment to Induce Bodily Tooth Movement in Orthodontic Treatment Using Finite Element Analysis." Materials 14, no. 17 (August 30, 2021): 4926. http://dx.doi.org/10.3390/ma14174926.
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Clear aligner technology has become the preferred choice of orthodontic treatment for malocclusions for most adult patients due to their esthetic appeal and comfortability. However, limitations exist for aligner technology, such as corrections involving complex force systems. Composite attachments on the tooth surface are intended to enable active control of tooth movements. However, unintended tooth movements still occur. In this study, we present an effective attachment design of an attachment that can efficiently induce tooth movement by comparing and analyzing the movement and rotation of teeth between a general attachment and an overhanging attachment. The 3D finite element modes were constructed from CBCT data and used to analyze the distal displacement of the central incisor using 0.5- and 0.75-mm-thick aligners without an attachment, and with general and overhanging attachments. The results show that the aligner with the overhanging attachment can effectively reduce crown tipping and prevent axial rotation for an intended distal displacement of the central incisor. In all models, an aligner with or without attachments was not capable of preventing the lingual inclination of the tooth.
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Guo, Runzhi, Yunfei Zheng, Hao Liu, Xiaobei Li, Lingfei Jia, and Weiran Li. "Profiling of subgingival plaque biofilm microbiota in female adult patients with clear aligners: a three-month prospective study." PeerJ 6 (January 2, 2018): e4207. http://dx.doi.org/10.7717/peerj.4207.
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Background Clear aligners are well known for facilitating oral hygiene maintenance and decreasing susceptibility to periodontal diseases as compared to conventional fixed appliances. However, few research studies focus on the subgingival microbial community during clear aligner treatment (CAT). Hence, this study investigates changes of the subgingival microbial community and its association with clinical characteristics during the first three months of CAT. Methods Ten female patients with clear aligners were enrolled in this study. Subgingival plaque samples were obtained at three time points: before orthodontic treatment (T0), one month after orthodontic treatment (T1) and three months after orthodontic treatment (T2). DNA was then extracted from plaque samples and analyzed by 16S rRNA gene sequencing. Periodontal examinations, including plaque index (PI) and gingival bleeding index (GBI) measurements were also recorded. Results The plaque indices (PIs) and gingival bleeding indices (GBIs) were slightly increased at T1 and T2, but no statistically significant difference was found. The alpha diversity indices, including the ACE, Chao1, Shannon indices, all showed a declining trend without significance, and a rising trend in the Simpson diversity index was observed. The weighted UniFrac distance was significantly higher at T1 and T2 compared with T0. Principal Coordinates Analysis (PCoA) demonstrated that the communities at T0 tended to cluster apart from the communities at T1 and T2. The relative abundance of the phylum Firmicutes and genus Mycoplasma was significantly increased at T0 compared with T2. There was no significant difference in the relative abundance of periodontal pathogens at the genus and species levels or core microorganisms at the genus level. Conclusion A slightly decreasing microbial diversity with a significant change of microbial structure was found during the first three-month clear aligner treatment (CAT). However, subjects receiving clear aligner treatment were free from periodontal diseases with relatively stable levels of periodontal microorganisms and core microorganisms. Thus, our preliminary findings indicated that clear aligners induced nonpathogenic changes of the subgingival microbiome in the first three-month treatment.
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White, David W., Katie C. Julien, Helder Jacob, Phillip M. Campbell, and Peter H. Buschang. "Discomfort associated with Invisalign and traditional brackets: A randomized, prospective trial." Angle Orthodontist 87, no. 6 (July 28, 2017): 801–8. http://dx.doi.org/10.2319/091416-687.1.
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ABSTRACT Objective: To evaluate differences in discomfort levels between patients treated with aligners and traditional fixed orthodontic appliances. Materials and Methods: This blinded, prospective, randomized equivalence two-arm parallel trial allocated 41 adult Class I nonextraction patients to either traditional fixed appliance (6 males and 12 females) or aligner (11 males and 12 females) treatment. Patients completed daily discomfort diaries following their initial treatment appointment, after 1 month and after 2 months. They recorded their levels of discomfort at rest, while chewing, and while biting, as well as their analgesic consumption and sleep disturbances. Results: Both treatment modalities demonstrated similar levels of initial discomfort. There were no significant sex differences. Patients in the traditional fixed appliances group reported significantly (P < .05) greater discomfort than patients in the aligner group during the first week of active treatment. There was significantly more discomfort while chewing than when at rest. Traditional patients also reported significantly more discomfort than aligner patients after the first and second monthly adjustment appointments. Discomfort after the subsequent adjustments was consistently lower than after the initial bonding or aligner delivery appointments. A higher percentage of patients in the fixed-appliance group reported taking analgesics during the first week for dental pain, but only the difference on day 2 was statistically significant. Conclusions: Patients treated with traditional fixed appliances reported greater discomfort and consumed more analgesics than patients treated with aligners. This trial was not registered.
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Sycińska-Dziarnowska, Magdalena, Liliana Szyszka-Sommerfeld, Krzysztof Woźniak, Steven J. Lindauer, and Gianrico Spagnuolo. "Predicting Interest in Orthodontic Aligners: A Google Trends Data Analysis." International Journal of Environmental Research and Public Health 19, no. 5 (March 6, 2022): 3105. http://dx.doi.org/10.3390/ijerph19053105.
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Aligners are an example of how advances in dentistry can develop from innovative combinations of 3D technologies in imaging, planning and printing to provide new treatment modalities. With increasing demand for esthetic orthodontic treatment, aligners have grown in popularity because they are esthetically more pleasing and less obstructive to oral hygiene and other oral functions compared to fixed orthodontic appliances. To observe and estimate aligner treatment interest among Google Search users, Google Trends data were obtained and analyzed for the search term, “Invisalign”. A prediction of interest for the year 2022 for three European Union countries with the highest GDP was developed. “Invisalign” was chosen to represent all orthodontic aligners as the most searched term in Google Trends for aligners. This is the first study to predict interest in the query “Invisalign” in a Google search engine. The Prophet algorithm, which depends on advanced statistical analysis methods, positions itself as an automatic prediction procedure and was used to predict Google Trends data. Seasonality modeling was based on the standard Fourier series to provide a flexible model of periodic effects. The results predict an increase in “Invisalign” in Google Trends queries in the coming year, increasing by around 6%, 9% and 13% by the end of 2022 compared to 2021 for France, Italy and Germany, respectively. Forecasting allows practitioners to plan for growing demand for particular treatments, consider taking continuing education, specifically, aligner certification courses, or introduce modern scanning technology into offices. The oral health community can use similar prediction tools and methods to remain alert to future changes in patient demand to improve the responses of professional organizations as a whole, work more effectively with governments if needed, and provide better coordination of care for patients.
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Akram, Sana, Muhammad Zeeshan, Mariyam Masood, Daud Anthoney, Nadia Irshad, and Mahrukh Anwar. "The Impact of Orthodontic fixed appliance and clear plastic aligner in periodontal health; A comparative clinical study." Pakistan Journal of Medical and Health Sciences 16, no. 4 (April 26, 2022): 305–7. http://dx.doi.org/10.53350/pjmhs22164305.
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Objective: To find out the periodontal health of patients with fixed orthodontic and clear aligner treatment with a follow-up of three months supportive periodontal therapy. Study Setting: After receiving approval from the hospital's ethical committee the study was conducted at Department of Dentistry Faryal Dental College, Sheikhupura from September 2021 to February 2022. Material and Methods: For this study 40 individuals were selected and divided them into 2 different groups regarding age and mode of treatment. In Group E, 20 individuals were of age in between 15-30 years and they used multi-bracket fixed therapy while in Group F, 20 individuals of age in between 15- 30 years were used treatment with clear aligners. Results: Results of current study were significant (P < 0.05) regarding logistic regression model of descriptive statistics of dependent variables measured for periodontal therapy after 3 month follow-up respectively. Percentage standard mean deviation (Mean±SD) levels of recovery rate, patient compliance, probing depth, plaque index, bleeding on probing and gingival recession for fixed appliance brackets and clear aligners were (56.21± 11.11, 31.14± 11.11, 13.04± 10.01, 26.10± 3.10, 15.21± 10.12, 01.12± 13.11),( 59.22± 1.01, 43.11± 01.10, 14.01± 11.21, 22.10± 3.10, 6.11± 10.11, 06.12± 14.11) noted respectively. Conclusion: The results of current study were significant (P < 0.05) regarding logistic regression model of descriptive statistics of dependent variables measured for periodontal therapy after 3 month follow-up respectively. Patient compliance with clear aligner treatment was higher than fixed appliance brackets. Key words: Fixed orthodontic appliance, clear aligner, periodontal diseases