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Journal articles on the topic 'Teeth Dental Devices'
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1
Uzun, Berna, Dilber Uzun Ozsahin, Hani Hamdan, Jinan Charafeddine, Gürkan Ünsal, and Deniz Özyer. "Optimization of Dental Devices and Tools Used on Teeth." BioMed Research International 2021 (August 6, 2021): 1–6. http://dx.doi.org/10.1155/2021/9913788.
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Taking decisions is important in every aspect of life. Decision-making has become a difficult problem in any situation where there are multiple criteria. The application of multicriteria decision-making methods that can bring mathematical and logical solutions to the problem from an analytical perspective has experienced considerable growth recently. It provides great benefits in solution and subsequent stages. Medical equipment selection is also a challenging, complex, and difficult problem for the decision-maker, due to the requirements of conflicting criteria, which must be taken into account simultaneously. In this context, the aim of this study implicates the principle of multicriteria decision-making theories on various types of instruments used in dentistry. Since the data used in this study are not numeric but linguistic, the Fuzzy PROMETHEE decision-making method is used. In this research, six dental tools most commonly used by professionals to perform operations on patients are compared and evaluated. Fuzzy PROMETHEE decision-making method investigations show that the dental mirror is the most effective tool among all compared tools, followed by dental suction, dental air abrasion, dental handpiece, dental laser, and dental X-ray, consequently, basing on the selected criteria and the importance weight given to each criterion. Using this technique, one can obtain more specific ranking results based on a specific preference level.
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Sołtysiak-Niedziela, M., K. Kwieciński, and J. Żmudzki. "Recent advance in appliances and materials enhancing therapy of disorders of the stomatognathic system." Archives of Materials Science and Engineering 2, no. 90 (2018): 74–84. http://dx.doi.org/10.5604/01.3001.0012.0665.
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Purpose: Dysfunctions of the stomatognathic system are treated with a lot of appliances. The aim of the work was to evaluate the current state in the field of diagnostic techniques and technological advance in appliances and materials enhancing therapy of occlusion disorders of the stomatognathic system. Design/methodology/approach: The principles of appliances functioning, manufacturing technology and materials were analysed. The analysis was made on the basis of the literature review and patent databases, conducting searches for a combination of keywords: dental material, occlusion, disorder, bruxism, clenching, grinding, appliance, therapy, tongue, oral, exerciser, trainer, mandible muscle, bite splint, dental plate. In the case of principles of functioning, devices that require insertion into the mouth are included in the tests. In technology and materials, attention has been paid to necessity of involving a dental technician or ability to perform appliance intra-orally ("chairside"), as well as mass production with possibility of custom fit. Findings: The most widespread in the treatment of disorders of the stomatognathic system are thermoformed materials and devices that are introduced between the dental arches to counteract occlusions of all teeth or selected teeth or force the position of the mandible in relation to the maxilla. Devices that function differently are those in which therapeutic effects result from toning of activity of the elevating mandibular muscles by provoking activity of the opposing muscles lowering the mandible or reducing intra-oral space, for example, by sublingual plates or tongue trainers. Appliances are mainly manufactured of: poly (ethylenevinyl acetate) or polycarbonates, as also mouldable polymers such as: acrylics, polyesters and rubbers. Research limitations/implications: Electronic devices that are not intended to therapy but used only to track mandible mobility or muscle activity during sleep were not taken into account. Practical implications: Solutions activating the action of the opposing muscles to the muscles lifting the mandible are few, and among them one device is retained on teeth without interfering in occlusion. Originality/value: Dental materials for devices for treatment of occlusion disorders are selected with no understanding the influence of elastic and frictional material properties and structure stiffness on the distribution of occlusion forces between the teeth and reactions in temporo-mandibular joints.
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Madhu, Priyanka Paul. "AN OVERVIEW: INSIGHT OF DENTAL BLEACHING AGENTS." Journal of Medical pharmaceutical and allied sciences 10, no. 4 (2021): 3182–86. http://dx.doi.org/10.22270/jmpas.v10i4.1253.
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The virtue of the "perfect smile" is an easily achievable task with a better understanding of materials and diseases as well as advances in technology. Discoloured teeth can often be completely or partially corrected by whitening as it is conservative, non-invasive, and inexpensive, it is the treatment protocol of choice for the masses. Hydrogen and carbamide peroxides have been used successfully for many years; the teeth whitening technique has changed several times over the past century, and nearly 10 years before the new millennium, the technique was finally recognized by international regulatory agencies. It is important that dentists handle peroxides with a basic knowledge as it has been shown that the results will give satisfactory results. This technique depends on correctly diagnosing the stains, handling the substrates (enamel and dentin), and sensitivity. Dentists are exposed to a wide variety of teeth whitening techniques, products, and brands, and mild peroxide activation devices have been developed over the past two decades. The art is also currently subject to change depending on the effectiveness of the various light sources inactivating peroxide and their relationship to satisfactory end results. To achieve instant whitening without risk or relapse, innovative technologies and promising products have been developed. This article is intended to keep up to date with these new trends providing insight into the current clinical challenges of vital teeth whitening. The purpose of this literature review is to explain the determining factors influencing the successful end-results of the techniques and to provide an overview in order to make an evidence-based treatment decision.
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Nirola, Ashutosh, and Shallu Bhardwat. "Immediate Implant Placement: Success or Failure?" Dental Journal of Advance Studies 01, no. 01 (2013): 046–48. http://dx.doi.org/10.1055/s-0038-1670594.
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AbstractEdentulism is most often the result of repeated tooth extraction from combined pathological process and/or dental trauma. Dental implants have emerged to be a highly successful and predictable treatment modality for replacement of missing teeth. Dental implants are the devices that are surgically inserted into the jaw bone to support a single prosthetic tooth and serve as abutments or as cosmetic replacements for missing teeth. Timing of implant placement following tooth removal may be important and this concept has challenged the original treatment protocol. This article aims to present two case reports of immediate placement of implant.
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Шемонаев, V. Shemonaev, Моторкина, et al. "The Control Unit Loads for the Preparation of the Teeth." Journal of New Medical Technologies 21, no. 3 (2014): 163–66. http://dx.doi.org/10.12737/5927.
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Work abrasive dental rotary tool is associated with tissue damage teeth. In case of non-observance of the thermal mode of preparation, it is possible the development traumatic pulpitis and violation of the local structure of hard tissues. To reduce unwanted consequences of preparation of teeth is mandatory, subject to such rules as the conduct of a stage of preparation of water-air cooling, the correct selection tool to perform certain tasks, the use of qualitative new tools, etc. One of the recommendations which aim to reduce the undesirable effects of preparation of hard tooth tissues, is to limit the load on the tool. In the available literature found research dedicated to finding the optimal values load on the tool preparation. It is believed that the load on the tool preparation to be about 20 g. At various times, the authors developed several devices designed to bring the power supply dental rotary tool to the recommended values. However, in the available literature hasn’t been met mention of using the proposed device. Thus, the problem of control load preparation remains unresolved. The authors developed a device that allows for preparation of teeth with preset effort. The article provides a technical description of the proposed device.
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Popov, SA A., and AO O. Frolov. "TREATMENT OF PATIENTS WITH OCCLUSAL CANTING USING ORTHODONTIC MINISCREW SYSTEM FOR MAXILLARY MOLAR INTRUSION." Science and Innovations in Medicine 1, no. 2 (2016): 20–23. http://dx.doi.org/10.35693/2500-1388-2016-0-2-20-23.
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Dentoalveolar vertical deformation has to be treated by intrusion with surrounding bone and tissues safety. More than 50% of orthodontic patients have lack of one or more teeth with dentoalveolar deformation. Removable orthodontic appliances are not able to intrude teeth with necessary long-lasting force, but mostly move abutment teeth inversely and extrude them. Optimal method used for upper teeth intrusion has to consist of non-invasive temporary anchorage devices and force that moves teeth fast but carefully, with periodontal tissues and surrounding bone safety. Aim - to justify the use of orthodontic miniscrews as temporary anchorage devices for occlusal canting with dentoalveolar component treatment. Materials and methods. Intrusion technique has been developed. It moves the teeth with elastic chain to two miniscrews. The volume of the surrounding bone and periodontal tissues after intrusion is the same as before the movement; the dental arch has not changed after the teeth movement; this method of intrusion is less traumatic and is done in shorter time. Conclusion. Developed intrusion method justifies the use of miniscrews and improves upper teeth intrusion making it faster, less traumatic and safer for surrounding tissues and teeth.
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Mârţu, Ioana, Ionuţ Luchian, Cătălina Dănilă, Cristian Mârțu, Eduard Bârcă, and Maria Antonela Beldiman. "The Influence of Manufacturing and Material Quality on Space Maintainers Longevity." Applied Mechanics and Materials 809-810 (November 2015): 1293–98. http://dx.doi.org/10.4028/www.scientific.net/amm.809-810.1293.
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Premature loss of temporary teeth, both the lateral and the frontal area can have unfavorable consequences on the development of permanent dentition, the support serving to maintain space for permanent teeth eruption in the dental arches. The aim of the study was assessment of different types of fixed and removable space maintainers in terms of their longevity in the dental arches that were applied as interceptive orthodontic treatment for edentulous space management transiently due to premature loss of deciduous teeth. The study followed the evolution of space maintainers properly applied to clinical cases that required these therapeutic options, and appreciated the success rate and the failure of these devices, important being the time at which the assessments were made. Findings failure rate of applied space maintainers was reported to the main causes that could lead to remove the devices: loss of space maintainers, especially those removable, fracturing both fixed and removable devices, loosening orthodontic rings and of course, taking into account the absence of some subjects at periodic reassessment meetings. The space maintainer was considered a success when it fulfill the main role for which it was applied - transitional management of edentulous space, and then being removed when the permanent succession tooth eruption occurred.
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Kaloustian, Marc Krikor, Walid Nehme, Claire El Hachem, et al. "Evaluation of Two Shaping Systems and Two Ultrasonic Irrigation Devices in Removing Root Canal Filling Material from Mesial Roots of Mandibular Molars: A Micro CT Study." Dentistry Journal 7, no. 1 (2019): 2. http://dx.doi.org/10.3390/dj7010002.
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We assessed the efficiency of two shaping file systems and two passive ultrasonic irrigation (PUI) devices for removing filling material during retreatment. The mesial canals from 44 extracted mandibular molars were prepared and obturated. The teeth were randomly divided into two groups, and then one group was retreated with Reciproc R25 (VDW, Munich, Germany) (n = 44) and the other group was retreated with 2Shape (TS, Micro Mega, Besançon, France) (n = 44). A micro-computed tomography (CT) scan was taken before and after the retreatment to assess the volume of the filling material remnants. The teeth were then randomly divided into four groups to test two different PUI devices: Irrisafe (Satelec Acteon Group, Merignac, France) and Endo Ultra (Vista Dental Products, Racine, WI, USA). The teeth in Group A were retreated with 2Shape to test the Endo Ultra (n = 22) device, the teeth in Group B were retreated with 2Shape in order to test the Irrisafe (n = 22) device, the teeth in Group C were retreated with Reciproc to test the Endo Ultra (n = 22) device, and Group D was retreated with Reciproc to test the Irrisafe (n = 22) device. A third micro-CT scan was taken after the retreatment to test the PUIs. The percentage of Gutta-Percha (GP) and sealer removed was 94.75% for TS2 (p < 0.001) and 89.3% for R25 (p < 0.001). The PUI significantly enhanced the removal of the filling material by 0.76% for Group A (p < 0.001), 1.47% for Group B (p < 0.001), 2.61% for Group C (p < 0.001), and by 1.66% for Group D (p < 0.001). 2Shape was more effective at removing the GP and sealer during retreatment (p = 0.018). The supplementary approach with PUI significantly improved filling material removal, with no statistical difference between the four groups (p = 0.106).
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Nilius, Manfred, Katrin Hess, Dominik Haim, Bernhard Weiland, and Guenter Lauer. "Multifunctional Templates for Minimized Osteotomy, Implantation, and Palatal Distraction with a Mini-Screw-Assisted Expander in Schizodontism and Maxillary Deficit." Case Reports in Dentistry 2020 (September 9, 2020): 1–13. http://dx.doi.org/10.1155/2020/8816813.
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Purpose. Schizodontism is complete separation of a dental germ. It results in a twin tooth and supernumerary teeth. The treatment of transverse constriction in combination with supernumerary dental germs and impacted central incisors can pose a challenge, especially in young patients, when the number of permanent teeth is not adequate to ensure secure anchorage. The use of navigation templates based on three-dimensional X-ray images allows for precise insertion of temporary mini-implants for the acquisition of palatal distractors. In addition, templates allow for minimally invasive biopsies and osteotomies. Methods. The treatment of schizodontism, dentitio tarda, and transverse constriction is to be assessed as an interdisciplinary method by using mini-screw-assisted devices. Minimized osteotomy of impacted supernumerary teeth or dental implantation can be carried out in a one-step-procedure based on digital preplanning and prefabrication of orthodontic devices. Results. Multifunctional templates allow for early planning, preoperative fabrication, and intraoral fixation of orthodontic appliances. In the case of an adolescent patient, a sustainable, interdisciplinary treatment concept could be demonstrated that shows age-appropriate gnathological development and stable growth conditions over a follow-up period of 10 years. Conclusion. One can likely assume that multifunctional templates allow for minimally invasive one-step surgeries as an interdisciplinary tool between orofacial surgery and modern orthodontics.
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Malkawi, Zain A., and Reem S. Tubaishat. "Knowledge, Practice and Utilization of Dental Services among Pregnant Women in the North of Jordan." Journal of Contemporary Dental Practice 15, no. 3 (2014): 345–51. http://dx.doi.org/10.5005/jp-journals-10024-1541.
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ABSTRACT Aim The aim of this study was to evaluate women's oral hygiene knowledge, practice, and use of dental services during pregnancy in the north of Jordan. Materials and methods Voluntary sample of 154 pregnant women of 18 to 40 years old were invited to participate in the study. They were asked to read a self-designated questionnaire and a cover letter which explained the purpose of the study. The questionnaire addressed self-reported demographics, knowledge, practice and use of dental services during pregnancy. Data were statistically analyzed using Chi-square test to determine statistically significant differences across knowledge, practice and use of dental services during pregnancy. Results The sample included 29.3% aged 20 to 24 years old; 33.1% having bachelor degree; and 66.9% were housewives. The majority of study sample 68.2% knew they need dental consultation during pregnancy; however, 39.5% received dental consultation during pregnancy. Majority 62.4% brushed their teeth regularly; however, 73.2% does not use auxiliary dental hygiene devices. Majority 44.5% visited dentist, when they feel pain. Statistically significant association were found between educational level and knowledge about need to dental consultation during pregnancy (p = 0.012); educational level and knowledge about link between pregnancy and periodontal diseases (p = 0.01); and economic status and use of auxiliary dental hygiene devices during pregnancy (p = 0.040). Conclusion Pregnant women brushed their teeth regularly and visited dentist occasionally. Income was significantly associated with increase use of auxiliary dental hygiene devices. Educational level was significantly associated with mothers’ knowledge about the need for consultation and possible link between pregnancy and periodontal diseases. How to cite this article Malkawi ZA, Tubaishat RS. Knowledge, Practice and Utilization of Dental Services among Pregnant Women in the North of Jordan. J Contemp Dent Pract 2014;15(3):345-351.
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Smerdina, Ju G., L. N. Smerdina, and E. A. Tyo. "Superelastic Active TiNi Elements of Removable Device in Orthodontic Treatment of Thin Periodontal Biotype." KnE Materials Science 2, no. 1 (2017): 424. http://dx.doi.org/10.18502/kms.v2i1.829.
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The article suggests using superelastic active elements of titanium niсkelid to move teeth in patients with secondary dental displacements due to periodontitis. It is emphasized that such superelastic instrument only has a sparing effect on periodontium and makes this procedure altogether nontraumatic. Devices featuring such active elements are considered indispensable for treatment of morbid thin-biotype periodontium. Presented is the original clinical case of chronical generalized periodontitis of medium severity, secondary vestibular displacement of upper front teeth, absence of upper masticatory teeth. The photographs show the patient’s condition before and after the complex treatment of the patient, thin periodontal biotype.
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Achmad, Harun, and Hendrastuti Handayani. "Ortodontik interseptif: efektivitas rapid palatal expander pada crowding gigi anterior pada anak Interceptive orthodontics: effectivity of rapid palatatal expander in children withanterior teeth crowding." Journal of Dentomaxillofacial Science 11, no. 1 (2012): 22. http://dx.doi.org/10.15562/jdmfs.v11i1.289.
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Interceptive orthodontic treatment aims to reduce and improve the causes of malocclusion in the stage of growth and development that may have a bad effect in the future. Dental crowding is a state of the disproportion betweenthe size of the teeth, jaw size and arch length. There are three conditions that facilitate the crowding, the width ofthe teeth, small jaw basal bones or a combination of both. One of the techniques of handling the case of childrenanterior crowding due to disproportion size of tooth width with a narrow arch is the rapid palatal expander device(RPE) in order to obtain the ideal space for the teeth and arch length. A boy, aged 11 years, wants to be treated histeeth with complaints teeth of front upper jaw and lower jaw experiencing crowding, thereby disrupting theappearance and mastication. Almost all the permanent teeth have erupted, and the jaw is still in its infancy. Thetreatment is carried out with a combination of fixed orthodontic devices and RPE for 4 months of treatment, showed a positive change in the profile seen in clinical oral cavity conditions of patients.
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Kobayashi, S., K. Ozeki, Y. Ohgoe, Li Gei, K. K. Hirakuri, and Hideyuki Aoki. "Biocompatibility of Diamond-Like Carbon Coated NiTi Orthodontic Wire and Acrylic Resin Teeth." Key Engineering Materials 284-286 (April 2005): 783–86. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.783.
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A variety of dental devices such as orthodontics, artificial teeth are implanted in oral cavity for long term. The implant coated with protective films, which can reduce corrosion and wear, may prevent the problems described above and extend the lifetime of implants to the benefit of the patients. Diamond-like carbon films have extreme hardness, low friction coefficients, chemical inertness, and high-corrosion resistance. Moreover, these properties make the good candidates as biocompatible coatings for dental devices. In this study, DLC films using the plasma CVD method deposited on acrylic resin and orthodontic archwires have investigated to detect the Ni release from the wires and to estimate cell growth in E-MEM immersed acrylic plates. After 6 months, the concentration of the nickel release from DLC-coated wire and Non-coated wire was 150 [ppb] and 933 [ppb], respectively. Results indicated DLC films inhibit the release of these materials, and prevent degradation of these materials in the solution.
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Kim, Minah, Byungyeon Kim, Byungjun Park, et al. "A Digital Shade-Matching Device for Dental Color Determination Using the Support Vector Machine Algorithm." Sensors 18, no. 9 (2018): 3051. http://dx.doi.org/10.3390/s18093051.
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In this study, we developed a digital shade-matching device for dental color determination using the support vector machine (SVM) algorithm. Shade-matching was performed using shade tabs. For the hardware, the typically used intraoral camera was modified to apply the cross-polarization scheme and block the light from outside, which can lead to shade-matching errors. For reliable experiments, a precise robot arm with ±0.1 mm position repeatability and a specially designed jig to fix the position of the VITA 3D-master (3D) shade tabs were used. For consistent color performance, color calibration was performed with five standard colors having color values as the mean color values of the five shade tabs of the 3D. By using the SVM algorithm, hyperplanes and support vectors for 3D shade tabs were obtained with a database organized using five developed devices. Subsequently, shade matching was performed by measuring 3D shade tabs, as opposed to real teeth, with three additional devices. On average, more than 90% matching accuracy and a less than 1% failure rate were achieved with all devices for 10 measurements. In addition, we compared the classification algorithm with other classification algorithms, such as logistic regression, random forest, and k-nearest neighbors, using the leave-pair-out cross-validation method to verify the classification performance of the SVM algorithm. Our proposed scheme can be an optimum solution for the quantitative measurement of tooth color with high accuracy.
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Mahiroglu, Muhammed Bedir, Erkut Kahramanoglu, Mustafa Ay, Leyla Kuru, and Omer Birkan Agrali. "Comparison of Root Surface Wear and Roughness Resulted from Different Ultrasonic Scalers and Polishing Devices Applied on Human Teeth: An In-Vitro Study." Healthcare 8, no. 1 (2020): 55. http://dx.doi.org/10.3390/healthcare8010055.
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The aim of the present study was to compare the root surface wear and roughness, resulted from the professional dental hygiene instruments, including ultrasonic dental scalers, rubber prophy cups, and nylon bristle brushes, on the extracted human mandibular incisor teeth. Teeth (n = 80) were randomly assigned into eight groups according to the applied scaler type (Ma = Magnetostrictive, Pi = Piezoelectric), degree of power (M = Medium, F = Full), and angulation (0° and 45°). In the second stage, the specimens (n = 40) were further divided into two groups according to the applied polishing device (nylon bristle brush or rubber prophy cup). Laser scanner and contact profilometer devices were used for the surface analysis. Both ultrasonic instruments tested in our study produced rougher surfaces when full power was used at a 0° angle (p < 0.01). The highest wear (0.82 ± 0.07 mm3) and roughness values (0.30 ± 0.01 µm) were detected in the PiF0 group. Polishing performed with a rubber prophy cup resulted in almost twice the wear as well as a smoother surface when compared to polishing performed with a nylon bristle brush (p < 0.001). Variations in the application parameters of ultrasonic scalers and the type of polishing instrument might lead to significantly different root-surface characteristics.
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Gagneja, Monisha, Prashant Gagneja, Robert Steelman, Robin Shaughnessy, and Phyllis Winter Johannes. "Oral Surgery in a Child with a Prosthetic Aortic Valve and Pulmonary Artery Stent at Risk for Thromboembolism." Journal of Clinical Pediatric Dentistry 32, no. 2 (2007): 151–53. http://dx.doi.org/10.17796/jcpd.32.2.y8n7r425302u3vp8.
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Children with prosthetic cardiac valves and other invasive mechanical devices that direct blood flow require anticoagulant medication for prevention of thrombosis. Dental surgery for these children has historically consisted of decreasing and/or discontinuing the oral anticoagulant and instituting heparin therapy prior to the planned dental procedure, which can result in thromboembolism and increased morbidity and mortality. This case report demonstrates that oral anticoagulation need not be decreased or discontinued prior to extraction of multiple carious primary teeth in a child at risk for thromboembolism.
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Vassar, Jason William, Anastasios Karydis, Terry Trojan, and Jack Fisher. "Dentoskeletal effects of a temporary skeletal anchorage device–supported rapid maxillary expansion appliance (TSADRME): A pilot study." Angle Orthodontist 86, no. 2 (2015): 241–49. http://dx.doi.org/10.2319/013015-76.1.
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ABSTRACT Objective: To quantitatively evaluate maxillary skeletal expansion using cone-beam computed tomography (CBCT) images and propose a novel way to quantify the dental tipping effects of temporary skeletal anchorage device–supported rapid maxillary expansion appliance (TSADRME). Materials and Methods: Images from 25 patients receiving rapid maxillary expansion with incorporated temporary skeletal anchorage devices (TSADs) before activation (T1) and after removal (T2) were analyzed to detect dentoskeletal changes. Results: A significant increase from T1 to T2 was found for all linear measurements except buccal maxillary width at the canines. The greatest buccal expansion was at the first molar, decreasing anteriorly. However, the greatest palatal expansion was at the first premolar. All younger subjects (8–16 years old) exhibited less dental tipping and greater expansion overall compared with the older subjects. There was great variability in dental tipping of first molars (mean = 4.31°), with some subjects demonstrating mild uprighting of these teeth. Conclusions: The TSADRME appliance is an effective, clinically useful device that results in mild molar tipping and may positively affect expansion in the area of TSAD placement.
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Schmalz, Gerhard, Christian Binner, Mirjam Eisner, et al. "Oral health-related quality of life in patients with heart failure and left ventricular assist devices—results of a cross-sectional study." Clinical Oral Investigations 25, no. 10 (2021): 5879–87. http://dx.doi.org/10.1007/s00784-021-03893-w.
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Abstract Objectives The aim of this cross-sectional study was to compare oral health-related quality of life (OHRQoL) of patients with left ventricular assist device (LVAD) and heart failure (HF). Material and methods Seventy-four patients with LVAD were recruited from University Department for Cardiac Surgery, Leipzig Heart Center, Germany. A group of 72 patients with HF was composed by matching (age, gender, smoking). The German short form of oral health impact profile (OHIP G14) was applied. Health-related quality of life (HRQoL) was measured by short form 36 survey (SF-36). Dental conditions (decayed-, missing- and filled-teeth [DMF-T]), remaining teeth and periodontal findings were assessed. Statistics: t-test, Mann-Whitney U test, Kruskal-Wallis test, chi-square or Fisher test, linear regression. Results Age, gender, smoking, underlying disease, co-morbidities and oral findings were comparable between groups (p > 0.05). OHIP G14 sum score was 3.53 ± 6.82 (LVAD) and 2.92 ± 5.35 (HF; p = 0.70), respectively. The scales SF-36 physical functioning (p = 0.05) and SF-36 social functioning (p < 0.01) were worse in LVAD. In the LVAD group, the DMF-T and remaining teeth negatively correlated with OHIP G14 sum score (p < 0.01). In HF patients, positive correlations were found between OHIP G14 and D-T (p < 0.01) and remaining teeth (p = 0.04). Moreover, DMF-T (p = 0.03) and remaining molars/premolars (p = 0.02) were negatively correlated with SF-36 scales in HF. Conclusions Oral health and OHRQoL was comparable between LVAD and HF; thereby, OHRQoL reflected the clinical oral status. Clinical relevance Dental care, with beginning in early stage of HF, should be fostered to preserve teeth and support quality of life before and after LVAD implantation.
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Wychowański, Piotr, Anna Starzyńska, Paulina Adamska, et al. "Methods of Topical Administration of Drugs and Biological Active Substances for Dental Implants—A Narrative Review." Antibiotics 10, no. 8 (2021): 919. http://dx.doi.org/10.3390/antibiotics10080919.
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Dental implants are, nowadays, established surgical devices for the restoration of lost teeth. Considered as an alternative for traditional prosthetic appliances, dental implants surpass them in reliability and patient feedback. Local drug delivery around the implants promotes osseointegration and reduces peri-implantitis. However, there are currently no methods of a multiple, precise topical administration of drugs to the implant area. Engineering coatings on the implants, drug application on carriers during implantation, or gingival pockets do not meet all requirements of dental surgeons. Therefore, there is a need to create porous implants and other medical devices that will allow a multiple drug delivery at a controlled dose and release profile without traumatic treatment. Due to the growing demand for the use of biologically active agents to support dental implant treatment at its various stages (implant placement, long-term use of dental superstructures, treatment of the peri-implant conditions) and due to the proven effectiveness of the topical application of pharmacological biologically active agents to the implant area, the authors would like to present a review and show the methods and devices that can be used by clinicians for local drug administration to facilitate dental implant treatment. Our review concludes that there is a need for research in the field of inventions such as new medical devices or implants with gradient solid–porous structures. These devices, in the future, will enable to perform repeatable, controllable, atraumatic, and repeatable injections of active factors that may affect the improvement of osteointegration and the longer survival of implants, as well as the treatment of peri-implantitis.
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Briso, AL, TC Fagundes, MO Gallinari, et al. "An In Situ Study of the Influence of Staining Beverages on Color Alteration of Bleached Teeth." Operative Dentistry 41, no. 6 (2016): 627–33. http://dx.doi.org/10.2341/15-306-l.
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SUMMARY The aim of this study was to evaluate overall color change in bovine tooth fragments submitted to dental bleaching treatment performed simultaneously with the ingestion of beverages containing dyes. For this purpose, tooth fragments assembled into intraoral devices were submitted to at-home dental bleaching using 10% carbamide peroxide (CP) for 14 days and to immersion in staining beverages for 10 minutes daily. The specimens were divided into the following study groups according to bleaching treatment and staining substance (n=12): G I (negative control): no bleaching + distilled water; G II (positive control): bleaching + distilled water; G III: bleaching + coffee; and G IV: bleaching + grape juice. Twelve volunteers used the device continually, except during meals, oral hygiene, dental bleaching, and pigment challenge. Color readings were performed using a spectrophotometer both before the bleaching treatment and after each treatment week. The results were submitted to the normality test. The data obtained were submitted to analysis of variance and the Tukey or Kruskal-Wallis and Dunn tests (α=0.05). All bleached groups showed similar ΔE results at the end of treatment. Staining beverages generated negative ΔL mean values, and the lowest result was obtained in the treatment with coffee after 14 days. The Δa values in the groups that received treatment with staining beverages were higher when compared to the control groups. Dental bleaching associated with the consumption of staining substances may not affect overall tooth color change by the end of the treatment, although the consumption of staining substances did influence the different color dimensions.
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Soares, Carlos Jose, Paulo César de Freitas Santos Filho, Paulo Sérgio Quagliatto, and Paulo Cézar Simamoto. "Dental Trauma: Restorative Procedures Using Composite Resin and Mouthguards for Prevention." Journal of Contemporary Dental Practice 8, no. 6 (2007): 89–95. http://dx.doi.org/10.5005/jcdp-8-6-89.
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Abstract Aim The aim of this article is to describe a step-by-step protocol for emergency care of a patient with a dentoalveolar injury in the anterior region of the mouth as well as the fabrication of a mouthguard to prevent future trauma. Background Dental trauma is one of the most serious oral health problems in active children and adolescents. Care of traumatized patients requires immediate initial emergency treatment followed by integrated procedures to restore damaged oral structures along with a subsequent trauma prevention strategy. Dentoalveolar injuries in the anterior region of the mouth are often characterized by tooth avulsion and coronal fracture. They are managed using procedures such as dental splinting, endodontic therapy with its unique characteristics, and restorative techniques to re-establish function and esthetics as well as protective mouthguards. Report A 16-year-old male presented with avulsion of his maxillary central incisors as a result of a direct, unintentional impact with an opponent during a basketball game. The teeth had been stored in physiological serum immediately following the injury and the patient received immediate care. On clinical examination, the right central incisor was fractured at the incisal third of the crown but no bone fractures were found. The teeth were reimplanted and splinted. The fractured right central incisor was restored following endodontic treatment and a mouthguard was fabricated for the patient. Summary The dentist must be knowledgeable about the most efficient and suitable treatment for each traumatic scenario in order to provide appropriate care for dental injuries. Coordinated multi-disciplinary action is fundamental in the successful treatment of these injuries. The dental mouthguard is an effective device for protecting the teeth and supportive structures during physical activities and must be part of the protective equipment used by athletes. It is the responsibility of the dental professional to make parents, trainers, and athletic associations aware of the risks associated with physical activities without orofacial protection; this should encourage the proper use of all protective devices to prevent dentoalveolar injuries that compromise oral functions, esthetics, and increase the cost of healthcare. Citation Santos Filho PCF, Quagliatto PS, Simamoto PC Jr., Soares CJ. Dental Trauma: Restorative Procedures Using Composite Resin and Mouthguards for Prevention. J Contemp Dent Pract 2007 September; (8)6:089-095.
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Zhang, Zhong Pu, Zhi Peng Liao, Nobuhiro Yoda, et al. "XFEM Fracture Modelling for Implant-Supported Fixed Partial Dentures." Applied Mechanics and Materials 846 (July 2016): 488–93. http://dx.doi.org/10.4028/www.scientific.net/amm.846.488.
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The dental implants have been increasingly used for replacing missing teeth over the past three decades. However, its mechanical strength remains a major concern to dental clinicians and patients. To investigate failure modes and fracture loads of implant-supported fixed partial bridge, eXtended Finite Element Method (XFEM) was employed in this study. The 3D finite element (FE) models simulating full mandibular teeth and implant-supported three-unit fixed partial denture (FPD) were developed to determine the crack initiation and propagation in the dental prostheses. The failure modes and fracture loads are compared for three typical treatment scenarios: namely three-unit FPD supported by two implants at left second premolar and first molar (named as cantilever Model-IIP), second premolar and second molar (bridge Model-IPI), and first and second molars (cantilever Model-PII). The XFEM analyses show that the bridge Model-IPI exhibited considerably high fracture resistance than the other two configurations. Model-IIP displays the worst fracture strength of these three case scenarios. The results provide a basis for clinical assessment of mechanical strength for implant-supported FPD or other restorative devices.
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Constantinovici, Andrei, Mihaela Păuna, Oana Cella Andrei, et al. "Comparative study regarding the chromatic distribution among anterior maxillary denture teeth in relation to color variation among natural anterior maxillary teeth." Romanian Journal of Stomatology 61, no. 4 (2015): 261–66. http://dx.doi.org/10.37897/rjs.2015.4.1.
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Objective. The aim of this study was to check whether the ways in which the color of anterior maxillary teeth varies in artificial dental sets matches the way in which color varies in the anterior maxillary natural dentition. Material and method. One examiner, free of any visual color deficiencies, experienced in the use of intraoral shade matching devices, has studied the chromatic behavior within the maxillary anterior dental group (13-23) for 8 types of artificial denture teeth sets. Four of these sets are made out of acrylic resin: Star Lux (Ruthinium Grup, Italia), Vita MTF (Vita, North America), Spofadent Plus (SpofaDent s.a, Cehia) and Acry Rock (Ruthinium Grup, Italia), 2 sets are made of composite resin: Ivoclar Ivostar (Ivoclar Vivadent, Lichtenstein) and Pigeon Summit (Pigeon Dental, China) and 2 of them are ceramic sets of denture teeth: Vita Lumin Vacuum (Vita Zahnfabrik, Germania) and Enta Ceram (Enta B.V., Olanda). With the help of the Vita Easy Shade (Vita Zahnfabrik – Germany), CIEL*a*b* chromatic parameters have been recorded for each tooth. 5 distinct measurements were carried out for every tooth. The results were later compared to the values obtained when measuring color variation in natural anterior maxillary teeth. When calculating the relative color difference between two teeth, the following formula has been used: (1) For each set of denture teeth, the variation of color between every two adjacent teeth was noted and compared to the color variation between the correspondent natural teeth. The mean difference between these two results was compared to the ADA limit value for human eye perceptibility of color difference (2 units). Results. The following aspects have been noted: some sets of denture teeth, for certain groups of teeth, show a similar chromatic behavior to natural teeth whereas other doesn’t. For the pair of teeth 13/12, only 4 of the studied sets of denture teeth showed an unperceivable difference in color variation when compared to natural dentition (Spofadent Plus, Star Lux, Vita Lumin Vacuum, and Ivoclar Ivostar). 5 is the number of matching sets of denture teeth for the 12/11 pair (Star Lux, Spofadent Plus, Vita MTF, Pigeon Summit, and Vita Lumin Vacuum), 5 sets also matched for the 11/21 pair (Vita Lumin Vacuum, Acry Rock, Ivoclar Ivostar, Star Lux, and Spofadent Plus). For the pair 21/22 5 matching sets were found (Spofadent Plus, Ivoclar Ivostar, Vita MTF, Acry Rock, Star Lux) and no matching sets were found for the 22/23 pair of teeth. Within the limits of this study we can affirm that using the Spofadent Plus set of denture teeth would lead to prosthetic results that show a variation of color within the anterior maxillary dental group most similar to natural teeth. Conclusions. Despite the fact that they bare the same name code, different sets of denture teeth produced by different brands have different colors, irrespective of the material they are made of. Chromatic behaviour, from one tooth to the next also differs from one make to another. The field of color in artificial denture teeth requires supplementary attention. The conclusions of this study set a general direction that can be followed in future studies.
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Olesov, E. E., T. N. Novozemtseva, V. E. Tikhonov, V. N. Olesova, and O. S. Kaganova. "Ceramic crown inlays as alternative to substitute defects of side teeth with light-conforming composites." Journal of Clinical Practice 9, no. 1 (2018): 23–27. http://dx.doi.org/10.17816/clinpract09123-27.
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A clinical and functional examination of the maxillofacial area was performed in 280 patients with the defects of the lateral teeth being replaced with ceramic crown inlays or light-cured composites three years ago. Computer methods were used to assess the articulation, occlusion and tone of the masticatory muscles on the T-Scan III and Bio EMG III devices. In a third of the lateral teeth, an unreasonable increase in indications to composite fillings has been established – when more than 50.0% of the occlusal surface is destroyed. Indicators of dental status are significantly better when using ceram- ic inlays compared with fillings made of composite material in the long term after treatment of multiple caries. Ceramic crown inlays prevent occlusal-articulatory disorders and dysfunction of the masticatory apparatus, characteristic in long-term periods for patients with multiple caries when replacement of lateral teeth defects with fillings made of composite.
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Sîmpălean, DS, Ghiga Dana, M. Petrişor, M. Măruşteri, V. Bacârea, and Băţagă Simona. "The frequency of dental caries in adult patients with gastroesophageal reflux disease." Acta Medica Marisiensis 61, no. 2 (2015): 124–27. http://dx.doi.org/10.1515/amma-2015-0036.
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Abstract Introduction. The aim of the study was to evaluate the frequency of dental caries in adults patients with gastroesophageal reflux disease. Material and method. A cross-sectional study was performed between November 2013 and October 2014. All subjects who agreed to participate to the study were asked to complete a questionnaire regarding personal information, oral hygiene and dental evaluation. The individuals with complete false teeth (superior and inferior removable prosthetic devices) were excluded from the study. The study included 134 people divided in two groups, based on upper gastrointestinal endoscopy: a group with gastroesophageal reflux disease (71), and a control group (63). Dental evaluation was performed by a dentist blind to the diagnosis of the subjects. Dental caries were evaluated by applying the decayed, missing, and filled teeth index (DMFT index). The statistical significance was defined as p<0.05. Results. From 71 subjects included in GERD group, 33 (46.48%) were males and 38 females (53.52%) with a mean age of 44.99±11.19 (42, 59.15% from urban area and 29, 40.85%, from rural area). In the control group we included 28 (44.44%) males and 35 (55.56%) females (mean age 43.84±9.48) and 29 (46.03%) subjects were from urban area and 34 (53.97%) from rural area. DMFT index in GERD group was 19.49±4.28 and in control group 18.16±4.54 (p<0.05). Conclusions. The present study showed that there is no difference between GERD and control group, regarding the frequency of dental caries.
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Ruxandra, Bartok, B. Dimitriu, C. Varlan, et al. "Microscopic evaluation regarding time behavior of orthodontic cements used for disjunctor cementing." ARS Medica Tomitana 21, no. 4 (2015): 191–95. http://dx.doi.org/10.1515/arsm-2015-0044.
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Abstract In order to fulfill their function, orthodontic devices must be cemented on teeth using orthodontic rings. The retention of the orthodontic ring is influenced mainly by the type of dental-ring adhesion. This study was initiated to determine possible microleakage events while using zinc phosphate cement Adhesor (Spofa Dental), conventional glass ionomer Ketac Cem (3M ESPE) and Fuji Ortho (GC) and a compomer Transbond Plus (3M Unitek). The results of the study are consistent with those reported in the literature reference, the compomer is the preferred adhesive material for cementing the orthodontic rings, compared to conventional glass ionomer cements and zinc-phosphate cement.
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Mendez, Paul Brian S., and Rizalie N. E. Mibato. "Viability of the Digitalization of Dental Laboratory in Bacolod City." Philippine Social Science Journal 3, no. 2 (2020): 31–32. http://dx.doi.org/10.52006/main.v3i2.143.
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Dentistry has evolved from its origin to the present day, becoming almost entirely digitized and supervised. The digitalized dental laboratory saves time due to computer-aided design and computer-aided manufacture (CAD/CAM) technology, which will capture and display clients' tooth or teeth and gums on a 3D image on a computer screen sent to the lab. It enables a dental lab technician to work faster and get the perfect design of the digital dental restoration. The main advantage of digitalization includes faster and improved efficiency on the turn-around time of devices, like crowns and bridges, and improved accuracy of procedures and manufactured gadgets. Digitalization Dental Laboratory (DDL) is the first to offer a digital dental lab in the city of Bacolod. The service allows laboratories to design the prosthesis digitally from in-house CAD software and email the design data provider or download the data file into a proprietary web host or server. The lab will cater to the digital needs of dental patients of the Multi-Specialty Dental Center (a sister company of DDL) and other dental clients.
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Pajevic, Tina, Jovana Juloski, and Marija Zivkovic. "Class II Division 1 malocclusion treatment using TADs: Case report." Serbian Dental Journal 67, no. 3 (2020): 159–64. http://dx.doi.org/10.2298/sgs2003159p.
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Introduction. Orthodontic treatment of Class II Division 1 (II/1) malocclusions in adults can be challenging since skeletal effects are limited. Possible treatment options are orthodontic camouflage or orthognatic surgery, in severe cases. The aim of this paper was to present a successful management of Class II malocclusion in an adult patient using temporary anchorage devices (TADs). Case report. After detailed clinical examination, study models and cephalometric analysis, a 26 years old patient was diagnosed with Class II malocclusion, an overjet of 12 mm, congenitally missing tooth 41 and midline shifted to the right in upper dental arch. In prior orthodontic treatment, patient had upper premolars extracted. Posterior teeth in upper left quadrant were shifted mesially. The camouflage treatment was considered, using temporary anchorage devices (TADs) to distalize posterior teeth on the left side, and gain space for incisor retraction and midline correction in upper dental arch. Results. Using TADs as additional anchorage in anterior region and coil spring for molar distalization, the space was made for tooth 23, midline correction and incisor retraction. After 40 months, a satisfactory result was achieved, overjet and midline correction, class I canines occlusion and class II molar occlusion. Conclusion. Class II/1 malocclusion in adults can be successfully treated using TADs. The success depends on the severity of malocclusion and patient cooperation.
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Tassery, Hervé, and Stephen Koubi. "Minimally Invasive Dentistry Using Sonic and Ultra-sonic Devices in Ultraconservative Class 2 Restorations." Journal of Contemporary Dental Practice 9, no. 2 (2008): 155–65. http://dx.doi.org/10.5005/jcdp-9-2-155.
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Abstract Aim Within the context of minimally invasive dentistry this article describes the sonic and ultrasonic cavity preparation techniques and assesses their advantages and disadvantages, clinical difficulties of their use, and offers a statement about these devices. Background Ultra-conservative Class 2 restorative techniques require the use of devices such as sonic and the new ultrasonic preparation systems. These systems, featuring a series of sonic and new ultra-sonic inserts, allow for the fabrication of preventive preparations on proximal surfaces without injuring the adjacent proximal surface or damaging the marginal ridge. Review An ultraconservative approach to the restoration of teeth with proximal caries that lack frank occlusal cavitation is facilitated by the use of slot-style cavity preparations created with sonic and ultrasonic instrumentation, and esthetic restorative materials. Summary New restorative procedures appear suitable for use in ultraconservative restorative dentistry. More frequent use of these procedures by dental practitioners could prevent the traditional breakdown of the marginal ridge when preparing a Class 2 dental restoration. When cautiously used, these two ultraconservative devices provide alternative operative procedures to treat carious lesions without frank occlusal cavitation and to promote another aspect of preventive dentistry. Clinical Significance New restorative procedures appear suitable for use in ultraconservative restorative dentistry. More frequent use of these procedures by dental practitioners could prevent the traditional breakdown of the marginal ridge when preparing a Class 2 dental restoration. Citation Koubi S, Tassery H. Minimally Invasive Dentistry Using Sonic and Ultra-sonic Devices in Ultraconservative Class 2 Restorations. J Contemp Dent Pract 2008 February;(9)2:155-165.
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Praskalo, Jovica, Adnan Beganović, Jovana Milanović, and Koviljka Stanković. "INTRAORAL DENTAL X-RAY RADIOGRAPHY IN BOSNIA AND HERZEGOVINA: STUDY FOR REVISING DIAGNOSTIC REFERENCE LEVEL VALUE." Radiation Protection Dosimetry 190, no. 1 (2020): 90–99. http://dx.doi.org/10.1093/rpd/ncaa081.
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Abstract This paper presents the study that would allow a revision of the currently valid diagnostic reference level in intraoral dental X-ray radiography in Bosnia and Herzegovina. The study was conducted for six procedures that are used to capture incisor, premolar and molar teeth, of both maxilla and mandible, in adults. Measurements were performed on 41 intraoral X-ray devices, 20 of which were systems with digital image receptor and 21 film-based X-ray systems. In this study, incident air kerma (Ki) and air kerma-area product (PKA) were used as patient dose descriptors. The third quartile (Q3) of the measured incident air-kerma values was used to compare with the current national diagnostic reference level (DRL) for intraoral dental procedures. The obtained results of Q3 for both types of devices, with film-based and digital image receptors, have shown that the third quartile values are lower (3.5 and 1.2 mGy, respectively) than the current national DRL (7.0 mGy). Hence, new data can be used to re-establish the diagnostic reference levels in intraoral dental X-ray examinations in Bosnia and Herzegovina.
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Shatskiy, I. G. "Dose assessment of medical exposure of radiographic dental studies." Radiatsionnaya Gygiena = Radiation Hygiene 12, no. 3 (2019): 69–77. http://dx.doi.org/10.21514/1998-426x-2019-12-3-69-77.
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The purpose of the study is to evaluate the effective doses of patients for the most common radiographic dental studies, comparing the obtained data with the literature and reference values given in the guidelines “Filling in the forms of the federal state statistical observation No. 3-DOZ” and are still often used for form filling instead of measured values. In the framework of this work in 2016-2018, 44 X-ray units were examined at 37 dental medical facilities in St. Petersburg and the Leningrad Region. Seven radiographic studies were included: radiographs of three groups of teeth (incisors, premolars, and molars) for the upper and lower jaw and bite radiography. Physical-technical and geometrical parameters were collected for selected types of the standard patient studies: X-ray tube voltages, total filtration, radiation output, combination of the time and the current of exposure or the exposure, area of the study, size of the irradiation field; the focal length. Further, the input (surface) dose was calculated from the radiation output of the device. Then, based on the initial information about the parameters of the procedures and the input dose, the absorbed doses and the effective dose were calculated using the PCXMC program. For most devices, the dose values are in the range of 0.5 to 10.7 µSv, which is significantly lower than the values used to fill in the 3-DOS form. The results of evaluating the effective dose for these devices are fairly homogeneous, but on one device, there were doses exceeding not only the values of doses on other devices, but also the values from the recommendations for 3-DOS for devices with digital receivers, as well as those approaching similar values for film devices. An almost linear dependence of the effective dose on the exposure time was established, while a similar dependence on the voltage on the X-ray tube was not found. The median value of the effective dose for the units with films detectors was 3.2 µSv for the maxillary incisors, 3.8 µSv for the maxillary premolars, 6.8 µSv for the maxillary molars, and for the mandibular incisors, premolars and molars – 3.2, 3.4 and 5.8 µSv, and for bitewing – 6.7 µSv. For the unit with digital detectors, effective doses were 1 µSv, 1,2 µSv, 2,2 µSv for maxilla, 1 µSv, 1,3 µSv, 2 µSv for mandibula and 2,8 µSv for bitewing. Attention is drawn to the substantial width of the ranges without emissions for the examination of premolars of the upper jaw, molars of both jaws and occlusion, which is the reason for the possible enhancement of optimization measures in these studies. When comparing with published data, it was found that the effective doses in St. Petersburg and the regional institutions are lower than the values obtained using standard round collimator and medium and high sensitivity films (class D and F, respectively), as well as lower dose levels in the European Commission Guidelines. In addition, the dose values deduced in this study are significantly lower than the values given in the guidelines “Filling in the forms of federal state statistical observation No. 3-DOZ” and which are still often used to fill in the form instead of the measured values. This indicates an overestimation of estimates of patient doses when using reference values from the 3-DOZ manual and the need to use individual patient doses, obtained on the basis of measurements. However, the effective doses in St. Petersburg and the Leningrad Region are higher than those obtained using a square collimator and high-sensitivity films. The above results suggest that it is necessary and possible to carry out optimization in X-ray dental studies in St. Petersburg and the Leningrad Region. Analysis of similar studies on other X-ray diagnostic techniques allows to extrapolate this statement to other regions of Russia.
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Pagella, P., A. Cordiale, GD Marconi, O. Trubiani, M. Rasponi, and TA Mitsiadis. "Bioengineered tooth emulation systems for regenerative and pharmacological purposes." European Cells and Materials 41 (May 10, 2021): 502–16. http://dx.doi.org/10.22203/ecm.v041a32.
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Genetic conditions, traumatic injuries, carious lesions and periodontal diseases are all responsible for dental pathologies. The current clinical approaches are based on the substitution of damaged dental tissues with inert materials, which, however, do not ensure full physiological recovery of the teeth. Different populations of dental mesenchymal stem cells have been isolated from dental tissues and several attempts have already been made at using these stem cells for the regeneration of human dental tissues. Despite encouraging progresses, dental regenerative therapies are very far from any clinical applications. This is tightly connected with the absence of proper platforms that would model and faithfully mimic human dental tissues in their complexity. Therefore, in the last decades, many efforts have been dedicated for the development of innovative systems capable of emulating human tooth physiology in vitro. This review focuses on the use of in vitro culture systems, such as bioreactors and “organ-on-a-chip” microfluidic devices, for the modelling of human dental tissues and their potential use for dental regeneration and drug testing.
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Prados-Privado, María, Javier García Villalón, Antonio Blázquez Torres, Carlos Hugo Martínez-Martínez, and Carlos Ivorra. "A Validation Employing Convolutional Neural Network for the Radiographic Detection of Absence or Presence of Teeth." Journal of Clinical Medicine 10, no. 6 (2021): 1186. http://dx.doi.org/10.3390/jcm10061186.
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Dental radiography plays an important role in clinical diagnosis, treatment and making decisions. In recent years, efforts have been made on developing techniques to detect objects in images. The aim of this study was to detect the absence or presence of teeth using an effective convolutional neural network, which reduces calculation times and has success rates greater than 95%. A total of 8000 dental panoramic images were collected. Each image and each tooth was categorized, independently and manually, by two experts with more than three years of experience in general dentistry. The neural network used consists of two main layers: object detection and classification, which is the support of the previous one. A Matterport Mask RCNN was employed in the object detection. A ResNet (Atrous Convolution) was employed in the classification layer. The neural model achieved a total loss of 0.76% (accuracy of 99.24%). The architecture used in the present study returned an almost perfect accuracy in detecting teeth on images from different devices and different pathologies and ages.
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Gebert, Tarcisio Jacinto, Vinícius Canavarros Palma, Alvaro Henrique Borges, and Luiz Evaristo Ricci Volpato. "Dental transposition of canine and lateral incisor and impacted central incisor treatment: A case report." Dental Press Journal of Orthodontics 19, no. 1 (2014): 106–12. http://dx.doi.org/10.1590/2176-9451.19.1.106-112.oar.
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INTRODUCTION: Dental transposition and impaction are disorders related to ectopic eruption or failure in tooth eruption, which can affect child physical, mental and social development and may be difficult to be clinically solved. METHODS: We describe a case of transposition between the upper left canine and lateral incisor associated with impaction of the central incisor on the same side, in a 12-year-old patient. Conservative treatment involving surgical-orthodontic correction of transposed teeth and traction of the central incisor was conducted. CONCLUSION: The option of correcting transposition and orthodontic traction by means of the segmented arch technique with devices such as cantilever and TMA rectangular wire loops, although a complex alternative, was proved to be esthetically and functionally effective.
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Sarcev, Ivan, Branislava Petronijevic, Dubravka Markovic, and Srecko Selakovic. "Mechanical resistance of restored teeth with extensive crown damage." Serbian Dental Journal 56, no. 2 (2009): 72–77. http://dx.doi.org/10.2298/sgs0902072s.
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Introduction. Extensively damaged teeth can be restored by different core build-up materials. The aim of this study was to examine the mechanical properties of the restored maxillary premolars with composite resin, dental amalgam and glass ionomer cement (GIC) using compressive strength test. Materials and methods. Forty extracted intact human maxillary premolars were used in this study. Artificial defect in dentin was prepared using diamond bur up to the half of the anatomic crown of the tooth. After core build-up procedure, each tooth specimen was mounted in auto polymerizing acrylic resin blocks 2 mm below cement enamel junction and they were kept in distilled water at 37?C one day before testing. Then, they were placed in specially adapted devices at the angle of 183? to the longitudinal axis and subjected to a controlled load of 1 mm per minute. Results. Results showed that the best mechanical properties had samples restored with resin composite (492.5 N), then with amalgam (341.2 N) and glass ionomer cement (171.8 N). Comparing the fracture force using ANOVA, there was statistic significance between these groups (p<0.01). There were significant differences among control group and restored teeth with composite resin, amalgam and GIC. There was no significant difference in values of fracture forces between groups with composite resin and amalgam. The fracture force corresponding to the teeth restored with the GICs was significantly lower compared to the control group and the group with composite resin and amalgam. Conclusion. Satisfactory mechanical properties of restored premolars were obtained using composite resin and dental amalgam as a core build-up material.
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Llena, Carmen, Esther Lozano, Jose Amengual, and Leopoldo Forner. "Reliability of Two Color Selection Devices in Matching and Measuring Tooth Color." Journal of Contemporary Dental Practice 12, no. 1 (2011): 19–23. http://dx.doi.org/10.5005/jp-journals-10024-1004.
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ABSTRACT Objective The objective of this study was to investigate the intra and interdevice reliability of two tooth color measurement devices: EasyShade (ES) and SpectroShade Micro (SSM). Materials and methods Tooth color was measured in six maxillary and mandibular. L*, a* and b* values and shade matches to VITA Classical and Vitapan 3D-Master shade guide systems were determined for all teeth. ÄE was assessed. Paired t-test and correlation coefficient (ICC) were used. Results Intradevices no significant differences (p > 0.05) were found between L*, a*, b*. Interdevice L* and b* were significantly higher for ES (p < 0.05), while a* was significantly higher for SSM (p < 0.05). ÄE showed no significant interdevice difference (p > 0.05). Intradevices ICC values were higher for ES but not significant (p > 0.05). Discussion The null hypotheses that they present no differences in their color measuring within devices or shade systems is accepted, but the results allow to reject the null hypotheses that they present no differences in their color measuring or shade systems between devices. Conclusion Both EasyShade (ES) and SpectroShade Micro (SSM) show excellent repeatability and so they can be used in office to evaluate tooth color or to assess color changes after treatment. Clinical significance Dental color can be diagnosed using dental spectrophotometers, allowing to detect in an objective way therapeutic dental color changes. How to cite this article Llena C, Lozano E, Amengual J Forner L. Reliability of Two Color Selection Devices in Matching and Measuring Tooth Color. J Contemp Dent Pract 2011; 12(1):19-23.
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Kim, Kyung A., Hyeon-Shik Hwang, Kyu-Rhim Chung, Seong-Hun Kim, and Gerald Nelson. "Recovery of multiple impacted maxillary teeth in a hyperdivergent Class I patient using Temporary Skeletal Anchorage Devices and augmented corticotomy." Angle Orthodontist 88, no. 1 (2017): 107–21. http://dx.doi.org/10.2319/071117-464.1.
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ABSTRACT Treatment of multiple impacted teeth is challenging. Three-dimensional treatment planning can help in delivering a better outcome. This case report presents a patient with an incomplete dental transposition between the canine and lateral incisor of the maxillary right side associated with the impaction of a dilacerated right central incisor. Using a two-stage surgical exposure and augmented corticotomy, the patient's occlusion and smile esthetics were significantly improved, and Class I occlusal relationships with optimal overjet and overbite were achieved after 50 months of orthodontic treatment. Thirty-month posttreatment records revealed a stable result.
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Ryu, Ji-In, Seoung-Won Cho, So-Hee Oh, et al. "A Novel Approach Using Customized Miniplates as Skeletal Anchorage Devices in Growing Class III Patients: A Case Report." Applied Sciences 10, no. 12 (2020): 4067. http://dx.doi.org/10.3390/app10124067.
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Facemasks using tooth-borne anchorages have been used primarily for the treatment of Class III malocclusion with maxillary undergrowth. However, when using a tooth as an anchorage, if the stability of the tooth used as an anchor is weak, the anchoring function may fail as the tooth tilts. Meanwhile, the use of skeletal anchorages such as implants, mini-implants, and mini-plates has been claimed to minimize the side effects of using dental anchorage. This case report describes the treatment of a six-year-old male patient with Class III malocclusion, presenting maxillary undergrowth and mandibular prognathism. Due to the mobility of the anchoring primary teeth, a device using dental anchorage was replaced with that using customized skeletal anchorage for the treatment. Customized guides and miniplates for the surgery were fabricated in advance through a computer-assisted system, in order to avoid possible damage to the adjacent tooth buds. The customized plates were accurately and passively placed on the intended part, showing the desired outcome.
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Bittar, Daniela Gonçalves, Christiana Murakami, Daniela Hesse, José Carlos Pettorossi Imparato, and Fausto Medeiros Mendes. "Efficacy of Two Methods for Restorative Materials’ Removal in Primary Teeth." Journal of Contemporary Dental Practice 12, no. 5 (2011): 372–78. http://dx.doi.org/10.5005/jp-journals-10024-1062.
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ABSTRACT Aim This in vitro study aimed to compare the time required for removal, the presence of residues of restorative material, tooth structure loss and dental surface morphology after removal of composite resin and amalgam restorations from occlusal cavities in primary molars using conventional high-speed bur and CVDentus® ultrasonic diamond tips. Materials and methods A total of 37 primary molars were allocated into four groups: Group 1 (n=9)—amalgam restorations removed using high-speed bur; Group 2 (n=10)—amalgam restorations removed using ultrasonic tip; Group 3 (n=8)— composite resin restorations removed using high-speed bur; Group 4 (n=10)—composite resin restorations removed using ultrasonic tip. After being restored, teeth were sectioned and analyzed through stereoscopic microscope images before and after restoration removal. The structural loss was analyzed by software of image analysis, and an examiner assessed for the presence of residues. Scanning electron microscopy was used to evaluate the morphology. Time and structural loss values were compared using ANOVA, and the percentages of samples with residues using Fisher test. Results There was no statistically significant difference in the tooth structure loss among different methods and restorative materials, as well as in the presence of residues of restorative material. However, diamond burs were faster than the ultrasonic method for both materials. Differences in dental morphology were observed between the methods of restoration removal, but not related to the restorative material. Conclusion Both conventional high-speed bur and ultrasonic diamond tip methods remove similar amounts of tooth structure, but the removal performed with diamond tips in ultrasonic devices is slower. Clinical significance This study shows that both ultrasonic and conventional high-speed bur methods for removing restorations generate similar loss of sound dental tissue, but the former is slower. How to cite this article Bittar DG, Murakami C, Hesse D, Imparato JCP, Mendes FM. Efficacy of Two Methods for Restorative Materials’ Removal in Primary Teeth. J Contemp Dent Pract 2011;12(5):372-378.
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Hlaing, Ei Ei Hsu, Yoshihito Ishihara, Atsuro Fujisawa, Takashi Yamashiro, and Hiroshi Kamioka. "Orthodontic management of a non-syndromic patient with concomitant bimaxillary hypohyperdontia: a case report." Dental Press Journal of Orthodontics 25, no. 1 (2020): 36–46. http://dx.doi.org/10.1590/2177-6709.25.1.036-046.oar.
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ABSTRACT Introduction: Tooth agenesis is one of the most common dental anomalies; however, the concomitant occurrence of opposite dental numerical variation of hypohyperdontia is extremely rare. Objective: To report the successful orthodontic management of a patient with non-syndromic concomitant bilateral agenesis of mandibular canines and two midline inverted supernumerary maxillary teeth. Case report: 21-year-old female patient with a chief complaint of protrusive right maxillary central incisor. The patient was diagnosed with a mild Class II skeletal base, Angle Class III molar relationship and increased overjet associated with hypohyperdontia. Anterior open bite accompanied with tongue-thrusting habit were also observed. Two temporary anchorage devices (TADs) were implanted at the buccal side of the maxillary molar region to control vertical height. Anterior teeth retraction was done after extraction of the maxillary first premolars, to improve the excessive overjet. The treatment mechanics involved lingual brackets system for the maxillary arch and transpalatal arch for anchorage control. Results: The total active treatment period was 35 months. Acceptable occlusion with increased bite force and contact area as well as functional excursion were established without interference, following complex orthodontic treatment with premolar substitution. The resultant occlusion and a satisfactory facial profile were maintained after 29 months of retention. Conclusion: The present case report provides implications regarding the orthodontic treatment of hypohyperdontia-associated substitution for missing teeth as an effective option for improving aesthetic and functional aspects.
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Guarnieri, Fabrício Daniel Finotti, André Luiz Fraga Briso, Fernanda de Souza e. Silva Ramos, et al. "Use of auxiliary devices during retreatment of direct resin composite veneers." PLOS ONE 16, no. 6 (2021): e0252171. http://dx.doi.org/10.1371/journal.pone.0252171.
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The removal of direct composite veneers, when the retreatment is necessary, represents a challenge to the clinician, since the healthy dental structure must be preserved. Thus, the aim of this study was to compare the accuracy provided by different auxiliary devices during retreatment of direct composite veneers. Seventy-five bovine teeth were prepared for direct composite veneers, scanned (T1), and restored. Specimens were divided into 5 groups for retreatment: conventional high-speed handpiece without auxiliary device (WD); high-speed handpiece with a white LED (WL); high-speed handpiece with an UV light (UL); electric motor and multiplier 1/5 handpiece (EM); and conventional high-speed handpiece using magnifying loupe (ML). After retreatments, other scanning was performed (T2). Changes on dental wear or composite residues areas, as well as, the average between wear and presence of residues were measured. Data were submitted to Kruskal-Wallis and Dunn’s post-test (p≤ 0.05). There were greater areas of wear for ML, being statistically superior to WD and EM groups. The ML presented smaller residues areas, being statistically lower than the WD and EM groups. Regarding the average between wear and the presence of resin residues, additional wear occurred after re-preparation, regardless of the group. Magnifying loupe promoted greater areas of wear and smaller areas of resin residues than conventional high-speed handpiece and electric motor. Both techniques using light accessories did not differ from other ones.
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Meto, Aida, Enrico Conserva, Francesco Liccardi, Bruna Colombari, Ugo Consolo, and Elisabetta Blasi. "Differential Efficacy of Two Dental Implant Decontamination Techniques in Reducing Microbial Biofilm and Re-Growth onto Titanium Disks In Vitro." Applied Sciences 9, no. 15 (2019): 3191. http://dx.doi.org/10.3390/app9153191.
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Dental implants are crucial therapeutic devices for successful substitution of missing teeth. Failure cases are mainly pathogen-associated events, allowing clinical progression toward peri-mucositis or peri-implantitis. The aim of this study was to compare the performance of two mechanical decontamination systems, Nickel-Titanium brush (Brush) and Air-Polishing system with 40 µm bicarbonate powder (BIC-40), by means of a novel bioluminescence-based model that measures microbial load in real time. Briefly, 30 disks were contaminated using the bioluminescent Pseudomonas aeruginosa strain (BLI-P. aeruginosa), treated with Brush (30 s rounds, for 90 s) or BIC-40 (30 s, at 5 mm distance) procedure, and then assessed for microbial load, particularly, biofilm removal and re-growth. Our results showed that Brush and BIC-40 treatment reduced microbial load of about 1 and more than 3 logs, respectively. Furthermore, microbial re-growth onto Brush-treated disks rapidly occurred, while BIC-40-treated disks were slowly recolonized, reaching levels of microbial load consistently below those observed with the controls. In conclusion, we provide evidence on the good performance of BIC-40 as titanium device-decontamination system, the clinical implication for such findings will be discussed.
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Лайва, O. Layva, Кондрашин, et al. "Odontoceridae by the Method of Dr. Karl-Peter Meschke (Wuppertal, Germany) and the Use of Device of Control and Correction of Angular Devia-tions of Dental Instrument." Journal of New Medical Technologies 21, no. 2 (2014): 94–97. http://dx.doi.org/10.12737/5009.
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The paper is devoted to the experiment, the purpose of which is to learn how random angular misalignments of the hands of a doctor during the odontoceridae affect on the quality of the side surface of the resulting stump. The experiment is considering two cases: first – odontoceridae by the method without the use of special means of preventing accidental angular deviations of the hands of the doctor, the second – odontoceridae using devices of control and correction of angular deviations of dental tool. The experiment was conducted on phantom models of the lower jaw contains a set of teeth frasaco. At the end of the experiment, to analyze the quality of the resulting surfaces, two phantom models were placed in the optical scanner and received two 3D scan. Comparison of angular deviations of the walls teeth relative to the reference pin was carried out. The quality of the surface of the lateral walls of the prepared teeth was shown the color field to the side wall of the stubs. Minimum angular deviation segment of the wall was marked with the same color as the wall of the reference pin. With increasing convergence of a segment of the wall color it becomes different from the color of the pin. Mechanical stabilization of the hands of doctors improves the quality of the surface of the side wall of the stump.
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Kecik, Defne. "Comparison of temporary anchorage devices and transpalatal arch-mediated anchorage reinforcement during canine retraction." European Journal of Dentistry 10, no. 04 (2016): 512–16. http://dx.doi.org/10.4103/1305-7456.195163.
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ABSTRACT Objective: The purpose of this study was to compare the dental and skeletal effects of canine retraction using conventional anchorage reinforcement systems and comparing them with the usage of TADs. Materials and Methods: The sample consisted of 50 patients having Class I malocclusions with bimaxillary protrusion indicated for first premolar extraction, and allocated into two groups. The first group consisted of 25 patients with a mean age of 18,7 years (min:14, max:22 years, 16 girls and 9 boys) that TADs were applied as an anchorage mechanic between attached gingiva of upper second premolar and first molar teeth. The second group consisted of 25 patients with a mean age of 19,4 years (min:15, max:23 years, 14 girls and 11 boys) that conventional molar anchorage with Transpalatal arch (TPA) was applied for the anchorage mechanics against canine retraction. Results: The results showed that mean mesial movement and the tipping of the first molars in TAD group between T0 - T1 were insignificant (P > 0,05), however in the TPA group were significant (P<0,01). Vertical movement of the molars were not significant when two groups were compared (P>0,05). Conclusion: Although TPA is a useful appliance, it doesn't provide an effective anchorage control on anteroposterior movement maxillary first molar teeth concerning first premolar extraction treatment. TADs are more convenient to provide absolute anchorage during maxillary canine retraction in contrast to transpalatal arch.
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Vitor, Luciana Lourenço Ribeiro, Tatiana Yuriko Kobayashi, Cleide Felicio Carvalho Carrara, et al. "Do technology-based devices improve carious lesion detection?" Brazilian Dental Science 19, no. 4 (2016): 24. http://dx.doi.org/10.14295/bds.2016.v19i4.1289.
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<p><strong>Objective:</strong> To compare the visual-tactile examination with the technology-based caries detection examinations in children. <strong>Methods: </strong>We assessed the teeth next to the cleft area of 95 children aged 6 to 12 years with oral clefts but without the presence of any associated syndrome or craniofacial anomaly, according to the following detection methods: visual-tactile examination (Method 1), visual-tactile examination through operating microscope (Method 2), visual examination through LED-based fluorescence device (Method 3), using ICDAS-II scores. The caries detection methods were compared by Friedman test (P&lt;0.05). <strong>Results:</strong> The efficacy of carious lesion detection methods were statistically similar (P=0.786). <strong>Conclusions:</strong> Technology-based devices did not improve caries diagnosis in children because their results were similar to those of visual-tactile clinical examination. From a clinical point of view, we recommended the dentists to be cautious in using these additional diagnostic measures to avoid false positive errors mainly in tooth surfaces difficult to be examined.</p><p><strong>Keywords:</strong> Dental Caries. Lenses. Fluorescence. Cleft lip. Cleft palate.</p>
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Anbarasi, K., and Kasim Mohamed. "Integration of medical device design training in clinical teaching - A case study." Asia Pacific Scholar 6, no. 2 (2021): 91–93. http://dx.doi.org/10.29060/taps.2021-6-2/cs2263.
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Dental practitioners often encounter situations that require customising the prosthesis to satisfy the needs of patients. Artificial devices called dental appliances or prosthesis is custom fabricated for the functional, aesthetic, and psychological wellbeing of patients (Chu et al. 2013). The patient’s complaints may vary from missing natural teeth to extensive maxillofacial defects, and there is no single best rehabilitative therapy for these conditions. Designing our product is the choice, and this demands adaptive expertise, i.e., the ability to generate potential solutions (Mylopoulos et al. 2018). Maxillofacial Prosthodontics applies a variety of learning methods like systematic simulation laboratory exercises, See One, Do One, Teach One (SODOTO method), and supervised clinical practice to train the routine technical skills and clinical practice. To maximise the outcomes in the complex prosthetic treatment, the course specialists designed an “Interdisciplinary Device Development program (IDDP)”—a value-added course for the postgraduates in collaboration with the Biomedical Instrumentation Engineering Faculty of our Institution. IDDP is the first of its kind challenge-based learning model in Dentistry that uses innovations to deal with rehabilitation care beyond routine practice. This paper aims to present our IDDP model and programme outcomes.
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Dwisaptarini, AP, S. Suebnukarn, P. Rhienmora, P. Haddawy, and S. Koontongkaew. "Effectiveness of the Multilayered Caries Model and Visuo-tactile Virtual Reality Simulator for Minimally Invasive Caries Removal: A Randomized Controlled Trial." Operative Dentistry 43, no. 3 (2018): E110—E118. http://dx.doi.org/10.2341/17-083-c.
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SUMMARYThis work presents the multilayered caries model with a visuo-tactile virtual reality simulator and a randomized controlled trial protocol to determine the effectiveness of the simulator in training for minimally invasive caries removal. A three-dimensional, multilayered caries model was reconstructed from 10 micro-computed tomography (CT) images of deeply carious extracted human teeth before and after caries removal. The full grey scale 0-255 yielded a median grey scale value of 0-9, 10-18, 19-25, 26-52, and 53-80 regarding dental pulp, infected carious dentin, affected carious dentin, normal dentin, and normal enamel, respectively. The simulator was connected to two haptic devices for a handpiece and mouth mirror. The visuo-tactile feedback during the operation varied depending on the grey scale. Sixth-year dental students underwent a pretraining assessment of caries removal on extracted teeth. The students were then randomly assigned to train on either the simulator (n=16) or conventional extracted teeth (n=16) for 3 days, after which the assessment was repeated. The posttraining performance of caries removal improved compared with pretraining in both groups (Wilcoxon, p&lt;0.05). The equivalence test for proportional differences (two 1-sided t-tests) with a 0.2 margin confirmed that the participants in both groups had identical posttraining performance scores (95% CI=0.92, 1; p=0.00). In conclusion, training on the micro-CT multilayered caries model with the visuo-tactile virtual reality simulator and conventional extracted tooth had equivalent effects on improving performance of minimally invasive caries removal.
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Kushkhov, Tembulat A., Diana A. Makhieva, Larisa V. Kardanova, Marina T. Tkhazaplizheva, and Adalbi Z. Khashukoev. "The Use of Polymeric Materials in Modern Dentistry." Key Engineering Materials 899 (September 8, 2021): 613–18. http://dx.doi.org/10.4028/www.scientific.net/kem.899.613.
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The achievements and discoveries of chemical science have firmly established themselves in all branches of humanity. One of the most significant chemistry possibilities is the polymerization and polycondensation of compounds, which, in turn, are methods for producing polymers. Polymers are high molecular weight compounds consisting of many units (monomers) linked by chemical bonds. Unique polymer compounds are the basis of plastics, chemical fibers, rubber, paints, and varnishes, adhesives [8]. Polymers are used for the manufacture of removable prostheses, materials for fillings and inlays, orthodontic appliances, artificial teeth, dental implants, as well as in the creation of artificial heart valves, artificial kidney devices, artificial circulation, artificial heart [6].
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Vasudeva, Gaurav, and Pawah Salil. "Dentistry in the 21st Century: A Look into the Future." Journal of Oral Health and Community Dentistry 3, no. 1 (2009): 9–14. http://dx.doi.org/10.5005/johcd-3-1-9.
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ABSTRACT Modern dentistry and research will make possible the maintenance of comprehensive oral health by involving the use of nanomaterials, biotechnology including tissue engineering and, ultimately, dental nanorobotics (nanomedicine). Within 10 to 20 years, these devices will allow precisely controlled oral analgesia, dentition replacement therapy using biologically autologous whole replacement teeth manufactured during a single office visit, and rapid nanometer-scale precision restorative dentistry. Tissue engineering is a novel and highly exciting field of research that aims to repair damaged tissues as well as create replacement (bioartificial) organs. A general review of the principles underlying key tissue engineering strategies are described. PRACTICE IMPLICATIONS Tissue engineering will have a considerable effect on dental practice during the next 25 years. The greatest effects will likely be related to the repair and replacement of mineralized tissues, the promotion of oral wound healing and the use of gene transfer adjunctively
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Kumar, A., V. Kumar, M. Goel, R. Mehta, T. Arora, and S. Pande. "Shade Selection: Blending of Conventional and Digital Methods - An Updated Review." Journal of Oral Health and Community Dentistry 8, no. 2 (2014): 109–12. http://dx.doi.org/10.5005/johcd-8-2-109.
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ABSTRACT Major challenges in cosmetic dentistry are to accomplish appropriate and satisfactory reproduction of natural shade of teeth. The procedure of choosing a shade can be performed using visual method or by an instrument. The kind of shade guide, individual ability to choose shades and conditions the choice is made under, all have influence on reliability and accuracy of the procedure. Therefore, it is necessary to introduce instrumental color determination in everyday work. They include RGB devices, colorimeters, spectrophotometers. The impact of the color science can be seen on various restorative materials ranging from ceramics to maxillofacial prosthetic materials. Good communication between the dental team of all these details is paramount to a successful aesthetic result.