Academic literature on the topic 'Implant-prosthesis complex'
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Journal articles on the topic "Implant-prosthesis complex"
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Queiroz, Salomão Israel Monteiro Lourenço, Anderson Nicolly Fernandes-Costa, Bruno Cesar de Vasconcelos Gurgel, Carla Martins de Carvalho, Rodrigo Fromer, and Saulo Hilton Botelho Batista. "Complex rehabilitation of atrophic mandible with implant-supported prosthesis." Revista clínica de periodoncia, implantología y rehabilitación oral 11, no. 1 (April 2018): 47–48. http://dx.doi.org/10.4067/s0719-01072018000100047.
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Marian Anand Bennis and Deepak Nallaswamy V. "Full mouth rehabilitation with maxillary equator® attachment over denture and mandibular hybrid denture - A case report." International Journal of Research in Pharmaceutical Sciences 12, no. 1 (January 13, 2021): 388–91. http://dx.doi.org/10.26452/ijrps.v12i1.4165.
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Implant-supported prosthodontic rehabilitation of total edentulism remains the most complex restorative challenges. The main reason being the number of variables that affect both the aesthetic and functional aspects of the prosthesis. A hybrid denture or the ‘Toronto prosthesis’ is one that is fabricated over a metal framework and retained by screws threaded into implants. This article presents the fabrication of implant-retained maxillary Equator® attachment overdenture opposing mandibular implant-retained hybrid prosthesis. A total of four implants (Equinox® Myriad plus) were placed the maxillary arch and six implants (Equinox® Myriad plus) in the mandibular arch. The patient's occlusal vertical dimension, centric relation, aesthetics and phonetics were determined and maintained throughout the restorative process. This case report describes the management of a completely edentulous patient with a mandibular implant-supported fixed prosthesis and maxillary implant-retained overdenture with Equator® attachment.
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Savabi, Omid, Ebrahim Ataei, and Niloufar Khodaeian. "Fabricating a Soft Liner-Retained Implant-Supported Palatal Lift Prosthesis for an Edentulous Patient: A Case Report." Case Reports in Dentistry 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/203547.
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This case report describes fabrication of a palatal lift prosthesis for a quadriplegic edentulous 30-year-old male with past head traumatic injury. We constructed an implant supported bar and used a soft-lining material for the maxillary palatal lift prosthesis to minimize the possibility of implant overloading and also provide a less complex and less expensive procedure for this patient.
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Wang, Wei Ping, Singare Sekou, Ya Xiong Liu, Di Chen Li, Bing Heng Lu, and Jue Wang. "Study on Integrated Method of Medical Implant Manufacture Based on Rapid Prototyping Technology." Key Engineering Materials 375-376 (March 2008): 353–57. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.353.
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The traditional method to manufacture the medical implant or prosthesis is based on sculpting and on the tissue site,or takes impressions of the entire face about human. The accuracy and efficiency of medical implant or prosthesis produced by conventional method is heavily relied on the skill and experience of both designer and manufacturer. In this paper, an integrated method of medical implant manufacture is approached. This integrated strategy was to establish a system that allows fabrication of facial prosthesis from digital information, and integrates the rapid prototyping with modeling technology of complex three-dimensional geometry from high-resolution non-invasive imaging, reverse engineering and computer aided design. The research results have shown that the integrated method can produce more exact-fit medical implant, that is, the physical model of the implant is more exactly fitted on the skull model. The advantages of this method are that the surgeon can plan and rehearse the surgery in advance, and a less invasive surgical procedure, and less time-consuming reconstructive, and an adequate esthetic can result.
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Felice, Pietro, Angelica Bertacci, Lorenzo Bonifazi, Maryia Karaban, Luigi Canullo, Roberto Pistilli, Pasquale Sammartino, Roberta Gasparro, and Carlo Barausse. "A Proposed Protocol for Ordinary and Extraordinary Hygienic Maintenance in Different Implant Prosthetic Scenarios." Applied Sciences 11, no. 7 (March 25, 2021): 2957. http://dx.doi.org/10.3390/app11072957.
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Prevention of peri-implantitis involves the early diagnosis of peri-implant mucositis. This article presents a protocol of hygienic maintenance in different implant prosthetic scenarios: single crown, fixed partial prosthesis, fixed full-arch, and overdentures. Others clinical conditions have to be taken into consideration: patient compliance; history of periodontitis; implants placed in augmented bone; short, zygomatic, pterygoid, and tilted implants; and complex prosthesis with false gingiva. Two levels of implant maintenance are described: ordinary, performed by dental hygienist, and extraordinary, carried out by both dentist and hygienist. Extraordinary maintenance also involves the removal and decontamination of the prosthetic structure. To obtain an effective prevention of peri-implantitis, one must plan ordinary and extraordinary hygiene in relation to the type of rehabilitation and clinical parameters.
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WANG, D., A. QU, H. ZHOU, and M. WANG. "BIOMECHANICAL ANALYSIS OF THE APPLICATION OF ZYGOMA IMPLANTS FOR PROSTHESIS IN UNILATERAL MAXILLARY DEFECT." Journal of Mechanics in Medicine and Biology 16, no. 08 (November 25, 2016): 1640030. http://dx.doi.org/10.1142/s0219519416400303.
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The objective of this research is to evaluate the biomechanical effect of zygomatic implant-supported obturator prostheses in unilateral maxillary defect. Based on CT data, four 3D numerical models were built. One model was a normal craniofacial complex (model 1) and other three models were structures with unilateral maxilla defect reconstructed using clasp-retained obturator prosthesis (model 2), one zygomatic implant-supported and clasp-retained prosthesis (model 3), two zygomatic implant-supported and clasp-retained prosthesis (model 4). Bilateral vertical loads of 300[Formula: see text]N were imposed and the stress and displacement distribution were calculated, analyzed and compared. The bilateral occlusal forces dispersed along the three-mechanical-pillar of the maxillofacial region and the displacement distributed symmetrically in model 1. Because of mechanical pillars break on the affected side, all occlusal forces were transferred by clasps and abutment teeth in model 2, which induced the increase in stress and displacement level. The zygomatic implant restored mechanical pillars and greatly reduced the stress and displacements levels in models 3 and 4. The stress and displacement distributions on clasps, bones, teeth and periodontal ligaments were more reasonable with the support of zygomatic implants. Therefore, the zygomatic implant-supported and clasp-retained prostheses were found to be more effective for unilateral maxillary defect reestablishment.
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Romeed, Shihab A., Robert Nigel Hays, Raheel Malik, and Stephen M. Dunne. "Extrasinus Zygomatic Implant Placement in the Rehabilitation of the Atrophic Maxilla: Three-Dimensional Finite Element Stress Analysis." Journal of Oral Implantology 41, no. 2 (April 1, 2015): e1-e6. http://dx.doi.org/10.1563/aaid-joi-d-12-00276.
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Placement of zygomatic implants lateral to the maxillary sinus, according to the extrasinus protocol, is one of the treatment options in the rehabilitation of severely atrophic maxilla or following maxillectomy surgery in patients with head and neck cancer. The aim of this study was to investigate the mechanical behavior of a full-arch fixed prosthesis supported by 4 zygomatic implants in the atrophic maxilla under occlusal loading. Results indicated that maximum von Mises stresses were significantly higher under lateral loading compared with vertical loading within the prosthesis and its supporting implants. Peak stresses were concentrated at the prosthesis-abutments interface under vertical loading and the internal line angles of the prosthesis under lateral loading. The zygomatic supporting bone suffered significantly lower stresses. However, the alveolar bone suffered a comparatively higher level of stresses, particularly under lateral loading. Prosthesis displacement under vertical loading was higher than under lateral loading. The zygomatic bone suffered lower stresses than the alveolar bone and prosthesis-implant complex under both vertical and lateral loading. Lateral loading caused a higher level of stresses than vertical loading.
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Prakash, Poonam, and Ambika Narayanan. "Biomechanics in dental implants." IP Annals of Prosthodontics and Restorative Dentistry 7, no. 3 (September 15, 2021): 131–36. http://dx.doi.org/10.18231/j.aprd.2021.028.
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Achieving primary stability in dental implants is crucial factor for accomplishing successful osteointegration with bone. Micro-motions higher than the threshold of 50 to 100 μm can lead to formation of fibrous tissue at the bone-to-implant interface. Therefore, osteointegration may be vitiated due to insufficient primary stability. Osseointegration is defined as a direct and functional connection between the implant biomaterial and the surrounding bone tissue. Osseointegration development requires an initial rigid implant fixation into the bone at the time of surgery and a secondary stage of new bone apposition directly onto the implant surface. Dental implants function to transfer the load to the surrounding biological tissues. Due to the absence of a periodontal ligament, its firm anchorage to bone, various forces acting on it and the presence of prosthetic components, they share a complex biomechanical relationship. The longevity of these osseointegrated implants depend on optimizing these complex interactions. Hence, the knowledge of forces acting on implant, design considerations of implant and bone mechanics is essential to fabricate an optimized implant supported prosthesis.
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Venezia, Pietro, Ferruccio Torsello, Vincenzo Santomauro, Vittorio Dibello, and Raffaele Cavalcanti. "Full Digital Workflow for the Treatment of an Edentulous Patient with Guided Surgery, Immediate Loading and 3D-Printed Hybrid Prosthesis: The BARI Technique 2.0. A Case Report." International Journal of Environmental Research and Public Health 16, no. 24 (December 17, 2019): 5160. http://dx.doi.org/10.3390/ijerph16245160.
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Purpose: To describe a technique intended to transfer of the intermaxillary and occlusal relationships in a fully digital environment from a complete denture to an implant-supported 3D-printed hybrid prosthesis (an acrylic resin complete fixed dental prosthesis supported by implants). Methods: In edentulous cases, the physiological mandibular position should be determined before the immediate loading procedures. In some cases, the use of interim removable prostheses for a few weeks could be useful to test the new occlusion in centric relation and to verify the prosthetic project. When the correct intermaxillary relationships are achieved, it is difficult to transfer them from the provisional to the final prostheses, as impressions or scans of edentulous arches do not have reference points for intermaxillary records. This paper presents a complex case and the technique used to transfer information from a complete denture to an implant-supported prosthesis with a digital workflow. A prosthetic stent has been used to scan the edentulous mandibular arch and to record the intermaxillary relation. Results: The delivery of the hybrid implant-supported prostheses was carried out with no problems and minimal occlusal adjustments. The patient was extremely satisfied with the treatment and the situation remained stable at the 1-year follow up. Conclusions: The approach described in the present article predictably maintains prosthetic information and allows the delivery of a final implant-supported restoration with the same occlusal relationship as the one tested with the provisional diagnostic dentures.
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Mestar, Abdelkader, Samir Zahaf, Nourddine Zina, and Ahmed Boutaous. "Development and Validation of a Numerical Model for the Mechanical Behavior of Knee Prosthesis Analyzed by the Finite Elements Method." Journal of Biomimetics, Biomaterials and Biomedical Engineering 37 (June 2018): 12–42. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.37.12.
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The human knee is a complex joint (the largest joint of the human body). During the different daily activities, this joint is exposed to significant loads and movements, may in some cases exceed the limit of the mechanical capacities of its components, which shows that the pathologies are quite numerous at the level of the human knee and the treatment sometimes requires surgery to either repair or implant (implant total knee prosthesis). As we know very well, the success of a total knee implant is highly dependent on the initial stability of the femoral or tibial implant and the integration of femur and tibia bone tissue with these implants in the long term. Due to the optimal distribution of mechanical stresses in the surrounding bone. It is for this reason that the search for reasonable solutions to compensate the damaged knee prosthesis and reduce the stresses in the cortical bone and spongy has become a very important research axis. In this regard, we have proposed three models of prosthesis knee joint from available literature and study the distribution of Von-Mises stresses and strains in the differents composents of knee prosthesis, know the total displacement between the model intact and model artificial of knee, 3D modeling software Solidworks 2016 is used for 3D modeling of knee prosthesis and finite element analysis software ANSYS 16.2 is used for numerical estimation of von-Mises stresses and strains. We find in this study that the maximum stresses and strains of Von Mises at the level of the tibia and tibial bone decrease, that is to say that the cement and the elastomer play a very important role in the absorption of the stresses and their minimization. On the other hand, the four knee prostheses (Model I (Ti6Al4V), Model II (CoCrMo), Model III (316L SS), Model IV (ZrO2)) implanted by elastomer contribute significantly to the reduction of stresses in the patella bone compared to the Intact Model. In general, both models of the knee prosthesis and reinforced by a stress reduction system (cement, elastomer) gave a lower stress level in the tibia and tibial bone of a normal person compared to a healthy model. The results obtained provide a theoretical basis for choosing an appropriate surgical model.
Dissertations / Theses on the topic "Implant-prosthesis complex"
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Faudemer, Gonzague. "Contribution de l'analyse mécanique à l'étude des implants et des biomatériaux dentaires." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00841306.
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La solution la plus favorable cliniquement au remplacement des dents absentes est aujourd'hui la mise en place d'implants dentaires. Cette technique nécessite la maîtrise de plusieurs problématiques qui s'articulent autour des interfaces du système. Celles-ci sont au nombre de trois soit : l'interface os-implant, l'interface implant-pilier prothétique et l'interface pilier prothétique-prothèse. Dans cette étude, nous analysons les matériaux mis en présence au sein des interfaces et ce, par le biais de l'analyse mécanique afin d'apporter une contribution objective au choix clinique des matériaux par les praticiens. Les substituts osseux sont ainsi étudiés sous le prisme de leur stabilité mécanique, servant de trame à la reconstruction osseuse au contact de l'implant. Plusieurs systèmes implantaires (ensemble implant-pilier prothétique) sont ensuite étudiés pour en évaluer également la stabilité, gage de solidité du système et d'absence de dévissage. Enfin, plusieurs polymères dentaires sont évalués et comparés afin d'établir leur apport dans la solidité du complexe implanto-prothétique.
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Esfandiari, Shahrokh. "Oral health technology assessment : study of mandibular 2-implant overdentures." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115892.
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There is little evidence that Health Technology Assessment (HTA) is much used in dentistry. Dental implant technology is an example of innovative oral health technology. The objectives of this research were to gather the evidence needed for the assessment of overdenture implant treatment so that both patients and dental practitioners can make informed decisions about this technology. These objectives included 1) investigating what types of dental clinicians adopt and provide dental implants 2) determining the effect of the clinicians' experience in the provision of implant supported prostheses and 3) measuring the patients' preference in provision of mandibular 2-implants overdenture technology.For the first part, a cross-sectional survey was sent to all licensed Canadian Dentists to measure the adoption and provision of implant technology. For the second part, we used the data on the first 140 edentulous elders who were enrolled in a randomized controlled clinical trial to compare the effects of mandibular conventional (CD) and 2-implant overdentures (IOD) on nutrition. The change in patient ratings of satisfaction after treatment, laboratory costs and the number of unscheduled visits were compared. For the last part, edentulous elders (N=36) who were wearing maxillary dentures and either a mandibular conventional denture (CD, n=13) or a two-implant overdenture (IOD, n=23) participated in this study. Participants' preference was measured during a 20-minute interview.
Multivariate regression analysis on the data from the first part of the study shows that the Dentist's gender, province of practice, specialty, and whether they practice alone or in association with other practitioners, are significantly associated with the adoption of implant technology (p<0.05). It is also shown that there was no difference in satisfaction scores for either prosthesis between the groups treated by experienced specialists or new dentists. Furthermore, it is shown that IOD wearers were willing to pay three times more than the current cost of conventional dentures for implant prostheses (p<0.05).
Overall, the results of this study 1) inform decision makers on what types of clinicians provide implant technology and 2) suggest that, with minimal training, all dental clinicians irrespective of their specialty, can provide successful implant overdenture prostheses that edentulous patients are willing to pay for.
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Junior, Fábio Afrânio de Aguiar. "Avaliação de overdentures mandibulares com diferentes sistemas de retenção: análise fotoelástica da transmissão de tensões e efeito de carga cíclica na força de retenção." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-12082013-162434/.
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O surgimento dos implantes osseointegrados melhorou a qualidade de vida de pacientes edêntulos. Seu uso favorece retenção e estabilidade, gerando maior eficiência mastigatória e conforto. O objetivo deste estudo foi avaliar manutenção da força de retenção e padrões de tensões gerados na mandíbula em overdentures confeccionadas com dois sistemas de retenção retidas por 2 ou 3 implantes. Teste de carga cíclica e análise fotoelástica de tensões foram realizados. Para o teste de carga cíclica foram utilizados modelos representativos de mandíbulas desdentadas e os grupos analisados foram: A) 2 implantes com barra clipe; B) 3 implantes com barra clipe; C) 2 implantes com barra clipe e bola/o\'ring nas extremidades; D) 3 implantes com barra clipe e bola/o\'ring nas extremidades. Cinco espécimes por grupo foram submetidos à ciclagem e 5 permaneceram imersos na máquina de ciclagem (controle). As leituras de força de retenção foram realizadas por ensaio de tração em máquina de ensaios universal antes da ciclagem e a cada 500 mil ciclos. A ciclagem foi realizada com frequência de 1,8 Hz, carga de 130 N, por 2 milhões de ciclos. Para a aplicação de carga, foram feitas pontas correspondentes à arcada antagonista unilateral posterior. Os dados obtidos foram analisados estatisticamente pelo modelo linear de efeitos mistos. Para a análise fotoelástica, foi feito um modelo mestre curvo em resina acrílica. O modelo foi preparado para conter cinco implantes, paralelos, distribuídos na região interforaminal. Grupo com 4 implantes com barra clipe e o\'rings nas extremidades foi incluído como controle. Prótese total foi confeccionada e usada em todos os grupos. A cada grupo, nova captura de retentores foi realizada. Para obtenção dos modelos fotoelásticos, foram confeccionados moldes em silicone do modelo mestre. A verificação das tensões em torno dos implantes foi realizada por meio de análise fotoelástica qualitativa de transmissão sob aplicação de carga cêntrica estática de 50 N. Diferentes tipos de pontas e locais de aplicação de carga foram usados. Os resultados demonstraram que carga cíclica influencia na perda de retenção overdentures mandibulares. Comparando grupos controle e teste, observou-se que os grupos com três implantes apresentaram maior influência da ciclagem na perda de retenção. Os sistemas de retenção estudados apresentaram comportamentos diferentes até um milhão de ciclos, após não houve diferença quanto à manutenção de retenção. Todos os grupos mantiveram retenção satisfatória ao final da ciclagem. Três implantes apresentaram maior tensão ao redor dos implantes e pouca ou nenhuma sobre o rebordo. Nos grupos com dois implantes, aplicação de carga posterior gerou tensões no rebordo alveolar e implantes. Grupos com extensões distais evidenciaram uma maior tensão ao redor dos implantes que os sem extensão.The appearance of osseointegrated dental implants improved the quality of life of fully edentulous patients. Implants promote retention and stability, producing higher masticatory efficiency and comfort. The aim of this study was analyze the retention maintenance and the stress pattern generated by two or three implants-supported mandibular overdentures with two attachments systems. Cyclic loading test and photoelastic stress analysis were performed. For the cyclic loading test, edentulous mandibular models were used. The analyzed groups were: A) 2 implants with bar clip; B) 3 implants with bar clip; C) 2 implants with bar clip and balls/o\'rings in the extremity; D) 3 implants with bar clip and balls/o\'rings in the extremity. Five specimens per group were submitted to cyclic loading and five were kept immersed inside the test machine (control group). The measurements of retention force were performed by tensile test in a universal testing machine before cyclic loading and after each 500 thousands cycles. The cycling was performed with frequency of 1.8 Hz, loading of 130 N, up to two million cycles. For the load application, tips corresponding to posterior unilateral antagonist teeth were produced. Data were statistically analyzed by linear mixed-effects model. For the photoelastic analysis, a curved master model was produced in acrylic resin. The model contained five parallel implants, distributed in interforaminal area. A group with 4 implants splinted with bar clip and balls/o\'rings in the extremity was included as a control. Complete denture was made and used in all groups. In each group, incorporating of new attachments was performed. For the obtainment of photoelastic models, silicone impression of the master model was performed. The assessment of stress around implants was done through quantitative transmission photoelastic analysis under static centric load application of 50 N. Different sorts of tips and load application places were used. The results showed that cyclic load influences the retention loss of mandibular overdentures. Comparing test and control groups, it was observed that groups with three implants showed higher influence of cyclic loading in retention loss. The studied attachments systems showed different behaviors up to one million cycles, after that there was not difference in the maintenance of retention. All groups had satisfactory retention at the end of cycling. Groups with three implants showed higher stress around implants and lower or none on alveolar ridge. In groups with two implants, load application on posterior area caused stress on alveolar ridge and implants. Groups with distal extensions demonstrated higher stress around implants than groups without extension.
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Shokati, Babak. "Long-term Complications Associated with Implant-supported Complete Fixed Dental Prosthesis." Thesis, 2013. http://hdl.handle.net/1807/35689.
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Rehabilitation of edentulous patients with Implant-supported Complete Fixed Dental Prosthesis (ICFDP) is a well-documented treatment option. This dissertation assessed the relation between the rate of biological/mechanical complications and the type of metal framework alloy, length of cantilever extension.
The results showed that long-term clinical outcomes of ICFDP were favorable. While 30% of patients experienced biological complications, 66.6% of the prostheses needed to be repaired during follow-up period. The risk of prosthesis failure and mechanical complications was significantly higher in silver-palladium frameworks as compared with palladium-silver or type IV gold alloys.
The length of cantilever was not correlated with the amount of marginal bone loss. The rate of marginal bone loss around anterior implants was higher than that of posterior implants associated with cantilever segments. The treatment improved the patients’ quality of life and 96% of patients would undergo the same treatment again if required.
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Audy, Nicholas. "La survie implantaire suite à une réhabilitation par mise en charge immédiate d’une prothèse totale mandibulaire reliée à deux implants non jumelés : une étude pilote expérimentale." Thèse, 2013. http://hdl.handle.net/1866/10077.
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Problématique : Les connaissances théoriques et pratiques au sujet de la mise en charge immédiate d’implants non jumelés chez les édentés sont limitées.
Objectifs : Cette étude avait pour but de : (1) déterminer le taux de survie implantaire de 2 implants non jumelés supportant une prothèse totale mandibulaire suite à une mise en charge immédiate, (2) évaluer les changements des niveaux osseux et de stabilité implantaire survenus sur ces 2 implants durant une période de 4 mois et les comparer à un implant témoin, et (3) décrire les complications cliniques associées à ce mode de mise en charge.
Méthodologie : Chez 18 individus édentés (âge moyen de 62±7 ans), cette étude de phase I avec un design pré/post a évalué les résultats cliniques suivant la mise en charge immédiate (<48 heures) de 2 implants non jumelés par une prothèse totale mandibulaire. À l’aide de radiographies périapicales, de sondages osseux et d’analyses de la fréquence en résonnance, les niveaux osseux péri-implantaires (en mm) et les niveaux de stabilité implantairte (en ISQ) de ces 2 implants insérés dans la région parasymphysaire ont été évalués à la chirurgie (T0) et au suivi de 4 mois (T1). Un implant non submergé et sans mise en charge inséré dans la région de la symphyse mandibulaire a été utilisé comme témoin. Les données ont été analysées avec des modèles mixtes linéaires, la méthode de Tukey ajustée, l’analyse de variance de Friedman et des tests de rang signés de Wilcoxon.
Résultats : De T0 à T1, 3 implants mis en charge immédiatement ont échoué chez 2 patients. Le taux de survie implantaire obtenu était donc de 91,7% (33/36) et, par patient, de 88,9% (16/18). Aucun implant témoin n’a échoué. Les changements osseux documentés radiologiquement et par sondage autour des implants mis en charge immédiatement étaient, respectivement, de
-0,2 ± 0,3 mm et de -0,5 ± 0,6 mm. Les pertes d’os de support implantaire n’ont pas été démontrées statistiquement différentes entre les implants avec mise en charge immédiate et les témoins. Les niveaux moyens de stabilité implantaire ont augmenté de 5 ISQ indépendamment de la mise en charge. Les niveaux moyens d’ISQ n’ont pas été démontrés statistiquement différents entre les implants avec mise en charge immédiate et les témoins à T0 ou T1. Cinq des 18 patients n’ont expérimenté aucune complication clinique, alors que 9 en ont eu au moins deux. Hormis les échecs implantaires, aucune de ces complications n’a entraîné de changements au protocole.
Conclusion : Les résultats à court terme suggèrent que : (1) le taux de survie implantaire suite au protocole immédiat est similaire à ceux rapportés lors d’un protocole de mise en charge conventionnel (2) les changements d’os de support implantaire et de stabilité ne sont pas différents comparativement à ceux d’un implant témoin, (3) un niveau élevé d’expérience clinique et chirurgicale est requis pour effectuer les procédures et pour gérer les complications associées. Ces résultats préliminaires devraient être confirmés dans une étude clinique de phase II.Problem: There is a theoretical and practice knowledge gap in regard to immediate loading of unsplinted implants in edentulous individuals. Objectives: This study aimed to: (1) determine the implant survival rate of 2 unsplinted implants supporting a mandibular complete overdenture following an immediate loading protocol, (2) assess marginal bone level and implant stability changes of these immediately loaded implants in a 4-month period and compared them to a control implant, and (3) describe the clinical complications associated with this mode of loading. Methods: In 18 edentate individuals (mean age 62±7 years), this phase-I trial with a pre/post design assessed the clinical outcomes following the immediate loading (<48 hours) of 2 unsplinted implants supporting a mandibular overdenture. Periapical radiograhs, bone probing measurements and resonance frequency analysis were used to assess marginal bone losses and implant stability changes of these two implants inserted in the mandibular parasymphyseal region, at baseline (T0) and 4-month follow-up (T1). A non-submerged and non-loaded implant inserted in the mandibular symphysis was used as a control. Data were analyzed using linear mixed models, adjusted Tukey tests, Friedman’s analysis of variance and Wilcoxon signed-ranks tests. Results: From T0 to T1, 3 immediately loaded implants failed in 2 patients. This resulted in an implant survival rate of 91.7% (33/36), and, per patient, of 88.9% (16/18). No control implant failed. The marginal bone losses around loaded implants were -0.2 ± 0.3 mm for radiographic measurements and -0.5 ± 0.6 mm for probing measurements. There was no statistically significant difference between immediately loaded and control implants in regard to the supporting marginal bone losses. The implant stability levels increased of 5 ISQ units regardless of loading. There was no statistically significant difference in the mean ISQ levels between immediately loaded and control implants at T0 or T1. Five out of 18 patients experienced no clinical complication, while 9 of them had at least two. Apart from implant failures, none of these clinical complications led to changes in the protocol. Conclusion: The short-term results suggest that: (1) the implant survival rate following the immediate protocol is similar to those reported during a conventional loading protocol, (2) marginal implant supporting bone and stability changes are not different compared to those of a control implant, (3) a high level of clinical and surgical experience is required to perform the procedures and to manage the associated complications. These preliminary results should be confirmed in a phase II clinical trial.
Books on the topic "Implant-prosthesis complex"
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Clinical and laboratory manual of implant overdentures. Ames, Iowa: Blackwell Munksgaard, 2007.
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Shafie, Hamid R. Clinical and Laboratory Manual of Implant Overdentures. Wiley & Sons, Incorporated, John, 2013.
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Shafie, Hamid R. Clinical and Laboratory Manual of Implant Overdentures. Wiley & Sons, Incorporated, John, 2013.
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Shafie, Hamid R. Clinical and Laboratory Manual of Implant Overdentures. Wiley & Sons, Incorporated, John, 2013.
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(Editor), Jocelyne S. Feine, and Gunnar E. Carlsson (Editor), eds. Implant Overdentures: The Standard of Care for Edentulous Patients. Quintessence Publishing (IL), 2003.
Find full textBook chapters on the topic "Implant-prosthesis complex"
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Ntounis, Athanasios, Michael Patras, Stavros Pelekanos, and Gregory Polyzois. "Treatment of Hemi-Mandibulectomy Defect with Implant-Supported Telescopic Removable Prosthesis." In Journal of Prosthodontics on Complex Restorations, 199–204. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274605.ch27.
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Penarrocha-Oltra, David, Ruben Agustin-Panadero, Guillermo Pradies, Sonia Gomar-Vercher, and Miguel Penarrocha-Diago. "Maxillary Full-Arch Immediately Loaded Implant-Supported Fixed Prosthesis Designed and Produced by Photogrammetry and Digital Printing." In Journal of Prosthodontics on Complex Restorations, 241–49. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274605.ch32.
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Fuller, Jennifer, and Shakeel Shahdad. "Dental-related disease." In Oxford Textbook of Sjögren's Syndrome, edited by Elizabeth J. Price and Anwar R. Tappuni, 87–94. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780198806684.003.0012.
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Saliva contains a complex mixture of organic and inorganic molecules, enabling it to play many roles within the oral cavity, including lubrication, protection of the mucosa and maintenance of dental hard tissues, antibacterial activity, digestion, and taste perception. Hyposalivation in Sjögren’s syndrome (SS) patients leads to dry mouth, rampant dental caries, increased risk of oral infections, difficulty in speaking and swallowing food, and dysgeusia (altered taste perception). SS patients have higher rates of decayed, missing, and filled teeth and increased rates of edentulousness. Rehabilitation with dental prosthesis for these patients can be problematic, as this can increase the risk of plaque stagnation and further dental disease, leading to failure of treatment. Saliva is pivotal in retention of certain types of dental prosthesis and protection of mucosal damage. SS patients may benefit from implant-retained prosthesis. In this chapter dental disease in SS patients and appropriate management are discussed.
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Çağlar Çınar, İhsan, B. Alper Gültekin, Alper Sağlanmak, and Cem Töre. "Dental Implants." In Biomaterials. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91377.
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The goal of modern dentistry is to return patients to oral health in a predictable fashion. The partial and complete edentulous patient may be unable to recover normal function, esthetics, comfort, or speech with a traditional removable prosthesis. The patient’s function when wearing a denture may be reduced to one sixth of the level formerly experienced with natural dentition; however, an implant prosthesis may return the function to near-normal limits. The esthetics of the edentulous patient is affected as a result of muscle and bone atrophy. In order to replace a missing tooth, the development of materials science and technology improved the materials for implant application. Nowadays, titanium has become the most popular implant material due to its advantages. The first submerged implant placed by Strock was still functioning 40 years later. Recently, zirconia implants and innovative surface designs are being researched and practiced. In this chapter, these materials will be comparatively discussed through contemporary literature and research.
Conference papers on the topic "Implant-prosthesis complex"
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Kasra, M., and M. D. Grynpass. "Thorn Implant: A Novel Mechanism for Interamedullary Stem Fixation." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33004.
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Existing non-cemented prostheses fixation mechanisms use press-fit techniques to obtain initial stability between bone and implant. For example, the primary fixation of non-cemented total hip stem prosthesis is achieved by carefully impacting the implant to the broached, contoured proximal femur. A successful primary fixation will be followed by the secondary fixation caused by bone ingrowth into the porous surface of implant. However, the primary postoperative fixation of the implants is usually far from ideal [1, 2]. Theoretically, for bone ingrowth to occur, a porous coated implant must be rigidly fixed with close apposition to the bone, without causing excessive stresses and stains at the bone-implant interface. However, this would require the medullar cavity to be prepared to very tight tolerances. In practice, this press fit technique requires interference fit between the prosthesis and the bone, thus creating large stresses and strains. In this case severe impacts for fitting the prosthesis may also fracture the bone. Therefore, it is important that the broaching and contouring of the femur be carried out carefully and exactly. This results in operations being lengthier and more complex. Furthermore, reaming and broaching damage bone vascular system delaying bone formation. The objective of this study was to introduce a novel fixation method, which can achieve immediate initial stability at the operation without having the mentioned problems of contemporary prosthetic designs. In this method, instead of waiting for the bone ingrowth to occur, pins from the inside of a hollow prosthesis stem are driven into the bone making a thorn implant. Therefore, fixation is achieved by so-called metal ingrowth into the bone instead of bone ingrowth into metal.
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Nun˜o, Natalia, and Dominic Plamondon. "Measurements of the Residual Stresses Due to Cement Polymerization for Cemented Hip Implants." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43979.
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In cemented hip implant, the polymethyl methacrylate (PMMA) also called bone cement is used as grouting material between the implant and the bone. During the operation, the bone cement still in a liquid form is inserted between the femoral component and the bone. During polymerisation of the cement, residual stresses are generated in the bulk cement. The process of cement curing is a complex solidification phenomenon where transient stresses are generated and the residual stresses vary with different boundary conditions during curing (Ahmed et al., 1982). In particular, normal stresses are generated at the implant-PMMA interface resulting in a press-fit problem. The cement does not have a chemical bond with the stem nor the bone, however it fills completely the space between the two and serves to distribute the load being transferred from the stem to the bone. An experiment has been devised to measure directly the residual stresses of the bone cement to reproduce the in-vivo behaviour of the prosthesis. An idealized prosthesis (19-mm diameter) is used. A subminiature load cell (9.5-mm diameter) is inserted inside the stem to measure directly the radial residual stresses of the PMMA on the stem. Bone cement polymerizes between the stem and the synthetic bone (40-mm outside diameter). The tests are conducted at body temperature of 37°C.
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Medelli´n Castillo, Hugo I., and Manuel A. Ochoa Alfaro. "Development of a Tridimensional Visualization and Model Reconstruction System Based on Computed Tomographic Data." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62822.
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Medical image processing constitutes an important research area of the biomedical engineering since it provides accurate human body information for 3D visualization and analysis, diagnostic, surgical treatment planning, surgical training, prosthesis and implant design, wafer and surgical guides design. Computed tomography (CT) and magnetic resonance imaging (MRI) have had a great impact in the medicine since they can represent complex three dimensional (3D) anomalities or deformities. In this paper, the development of a system for tridimensional visualization and model reconstruction based on CT data is presented. The aim is to provide a system capable to assist the design process of prosthesis, implants and surgical guides by reconstructing anatomical 3D models which can be exported to any CAD program or computer aided surgery (CAS) system. A complete description of the proposed system is presented. The new system is able to visualize and reconstruct bone and/or soft tissues. Three types of renders are used: one for 3D visualization based on three planes, other for 3D surface reconstruction based on the well known marching cubes algorithm, and the other for 3D volume visualization based on the ray-casting algorithm. The functionality and performance of the system are evaluated by means of four case studies. The results have proved the capability of the system to visualize and reconstruct anatomical 3D models from medical images.
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Agostinho Hernandez, Bruno, Alexander Paterno, Edson Antonio Capello Sousa, João Paulo de Oliveira Freitas, and Cesar Renato Foschini. "Fatigue Analysis of Dental Prostheses by Finite Element Method (FEM)." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51911.
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Introduction and Objectives: The dental prostheses are typical biomechanical structures because they have the objective to restore the mastication functions and are responsible for replacing the original tooth that was damaged. In the last few years, many studies have been done and big achievements have been noticed in this area. However, clinical studies and experimental procedures for these conditions are sometimes impractical, due to the biological nature of these components and the difficult to reproduce and to analyze such conditions. Moreover, it involves complex geometries, loads and mechanical behaviors, which analytical solution is very difficult to achieve. For these reasons, many researchers have applied the Finite Element Method (FEM). This method allows the evaluation of non-linear situations (e.g. biomechanical interactions) with complex geometries where experimental tests are usually difficult to be conducted. Furthermore, the uses of this method allow failure evaluation and it forecast occurrence. Like any mechanical structure, prostheses are sensible to failures. The cyclic nature of the loading that components are exposed means that fatigue failures are the type of failure which needs more attention in these kinds of structures. Therefore, this project aims to develop a tridimensional finite element model of dental prosthesis in order to evaluate the fatigue problem. Methods: A geometric model from a single dental prosthesis compounded by an implant, an abutment screw, an abutment, a fixation’s screw and a crown will be generated from Micro CT and scanning data. Then, the geometry will be exported to finite element software where a finite element model will be created. After these steps, boundaries conditions will be applied and simulations will be done. Finally, the simulation results will be analyzed. Results: The results from fatigue simulations and analysis demonstrated that abutment screw will have a finite life in most of the analyzed cases, and the fixation screw will be an infinite life. Conclusion: The results obtained illustrate the efficiency of Finite Element Method on simulating the biomechanical conditions, mainly in dental prostheses. In this study, the fatigue conditions were explored and analyzed. Finally, the knowledge about this problem could be improved.
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Ocran, Emmanuel, Johnson Aina, and Daniel Odoh. "Simulation of the High Strain Rate Deformation Behavior of Titanium Based Alloy for Biomedical Applications." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63046.
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Human body functions as a network of mechanically coupled parts (components) that work together to form a complete system; these body components can experience failure when in service. Specifically, failure such as arthritis may be caused by articulations at the hip and knee joints. One of such solutions to this failure is the total hip replacement. Materials used in this prosthesis, therefore play an important role in the success of the implant. One of the most commonly used implant material in modern day arthroplasty is the Ti6Al4V alloy, because of its excellent resistance to wear and corrosion in the human body environment. In reality, such implant in service may be subjected to impact loading (at a velocity of about 250–1000m/s), leading to deformation. Typical, examples include an implanted patient involved in an automobile crash and a golf ball hitting an implanted patient at the point of implantation. In this study, the wear and tear resistance property of Ti6Al4V alloy is determined by performing simulation on the high strain rate deformation behavior of IN718 super alloy material and Ti6Al4V plated Inconel material. The maximum stress localized within the plated Inconel material is lesser than that in the unplated material. This shows that Ti6Al4V alloy prevents the localization of stress in the parent Inconel material and is therefore a good wear prevention material, under impact conditions. Also, the impact characterization behavior of Ti6Al4V material is performed in this research in order to determine the maximum stress allowable in the titanium alloy before ultimate failure. Simulation of the high strain rate behavior of the Ti6Al4V alloy is performed at velocities in the range 9–20m/s. It is observed that the localized stress within the Ti6Al4V alloy increases with increased impact velocity. A maximum localized stress is observed in the material beyond which the Ti6Al4V alloy experiences failure. The result of the simulation process helps in determining the maximum impact which an implanted patient can therefore be exposed to and the preventive measures that can be taken in order to guarantee safety of the implanted patient.