The influence of functional forces on the biomechanics of implant-supported prostheses—a review

Sahin, Şevki; Çehreli, Murat Cavit; Yalçın, Emine

doi:10.1016/s0300-5712(02)00065-9

Cited by 288 publications

(214 citation statements)

References 73 publications

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“…O osso que os circunda não constitui um substrato homogêneo, de modo que suas propriedades físicas variam conforme a idade, o estado funcional e os fatores sistêmicos do paciente 7 . Diante disso, estudos in vitro têm empregado materiais considerados homogêneos e isotrópicos 6,9,20 .…”

Section: Discussionunclassified

Estudo comparativo das microdeformações resultantes de cargas estáticas axiais e não axiais em próteses de três elementos implantossuportadas

Campos

Rodrigues

Balducci

et al. 2014

Rev. odontol. UNESP

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ResumoIntrodução: O controle das microdeformações ao redor dos implantes é um fator que pode levar a uma melhor osseointegração e manutenção das estruturas ósseas. Objetivo: Avaliar a distribuição de tensões ao redor dos implantes, utilizando-se a extensometria, sob a influência da aplicação de cargas estáticas axiais e não axiais em próteses parciais fixas de três elementos, em diferentes pontos de aplicação de carga. Material e método: Em um bloco de poliuretano, foram instalados três implantes de hexágono interno e, sobre esses implantes, pilares protéticos microunit foram conectados com torque de 20 Ncm. Cilindros plásticos foram utilizados para realização dos enceramentos padronizados que, posteriormente, foram fundidos em liga de cobalto cromo. Extensômetros foram colados na superfície do bloco ao redor dos três implantes. As estruturas metálicas foram parafusadas com torque de 10 Ncm cada. Em seguida, foram realizados carregamentos verticais estáticos de 30 kgf, durante dez segundos, em cinco pontos pré-determinados (A, B, C, D e E), utilizando um dispositivo de aplicação de cargas (DAC). Resultado: Os dados foram analisados pelo teste RM ANOVA, que indicou que o efeito entre o ponto de aplicação de carga e os diferentes corpos de prova não foi estatisticamente significante, enquanto que, para o efeito entre os pontos de aplicação de carga, houve diferença (p=0,0001). Em seguida, aplicou-se o teste de comparação múltipla de Tukey. Conclusão: A aplicação de carga sobre os pontos não axiais D e E produziu um aumento da magnitude de microdeformação ao redor dos implantes.Descritores: Implantes dentários; prótese parcial fixa; prótese dentária. AbstractIntroduction: The control of the micro strain surrounding implants is a factor that can lead to a better osseointegration and maintenance of bone structures. Objective: evaluate in vitro, using strain gauge analysis , the influence of the axial and non-axial static load in implant-supported fixed partial dentures, varying the point of load application. Material and method: In a block of polyurethane three internal hexagonal implants were installed, on implants abutments microunit were connected with torque of 20 Ncm, and plastic prosthetic cylinders were screwed on to the abutments, which received standard patterns cast in Co-Cr alloy (n=10). Four strain gauges were bonded on the surface of the block tangentially to the three implants. Each metallic structure was screwed onto the microunit with a 10 Ncm torque. With a load application device (DAC) static vertical loads of 30kgf were applied for ten seconds at five predetermined points (A, B, C, D and E). Result: Result analyzed by RM ANOVA, in which the effect of the point of load application and differents specimens were not statistically significant, whereas regarding the points of load application presented statistical differenced (p=0.0001). Applying Tukey's multiple comparison tests. Conclusion: The application of load on the non-axial points D and E produced an increase in the magnitude of micro strain ar...

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Section: Discussionunclassified

Estudo comparativo das microdeformações resultantes de cargas estáticas axiais e não axiais em próteses de três elementos implantossuportadas

Campos

Rodrigues

Balducci

et al. 2014

Rev. odontol. UNESP

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“…The outcome of implant treatment is often maximized when implants are placed in dense bone with an appropriate size of implant [5].…”

Section: Introductionmentioning

confidence: 99%

Artificial Neural Networks Can be Used as Alternative Method to Estimate Loss Tooth Root Sizes for Prediction of Dental Implants

Görler¹,

Akkoyun²

2017

Cumhuriyet Science Journal

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Abstract. The aim of this study was to investigate the feasibility of estimation of canine root length and cervical width by an artificial neural network method with an appropriate setting. We randomly obtained 120 representative samples of routine panoramic radiographs by computer tomography (CT). Of 120 samples, 96 (80%) were used in training phase and 24 (20%) were used in test phase after a randomized selection. The intertuberal length (IL) of maxilla and canine root length (RL) and canine root cervical width (CW) of the right canine tooth was measured and was entered to a datum file. According to the results, the method is convenient with this purpose. The mean square error values are lied between 2% and 4.4% for the estimations. This shows that the ANN method is an alternative method for the canine root length and cervical width. The ANN software and system, which is a cost-effective tool to purchase, can be adapted to dental implant surgery after further study and optimization of software settings, allowing for the prediction of the size and width of implants in implant surgery. Tahminler için ortalama karesel hata değerleri %2 ile %4.4 arasında bulundu. Bu ANN yönteminin kanin kök boyu ve servikal genişliği için alternatif bir yöntem olduğunu göstermektedir. Satın alınabilecek uygun maliyetli bir araç olan ANN yazılımı ve sistemi, daha ileri çalışmalar ve yazılım ayarlarının optimizasyonundan sonra dental implant ameliyatına adapte edilebilir, implant ameliyatlarında implantların boy ve genişlikleri için öngörü imkanı verebilir.

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“…The requested property, stress for example is investigated with in each element of the model. It is a computer-based method used to calculate and visually represent stresses and strains in complex structures subjected to simulated loads [4,5]. Three-dimensional finite element stress analysis has been extensively used to study the biomechanics of dental implants and offers many advantages over other methods [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Stresses Around Dental Implants Placed in Normal and Fibula Reconstructed Mandibular Models using Finite Element Analysis

Nesappan

Ariga

2014

JCDR

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Purpose: This study was formulated to evaluate and compare stresses around endosseous implants in various normal and fibula reconstructed mandibular models using finite element analysis method. Materials and Methods:CT scan data of a completely edentulous patient and a fibula reconstructed patient was made and the Dicom images were used to design 3-D mandibular models using software. Based on the information from the scan data, various types of reconstructed FEA models were made. Implants (fixtures) and superstructures were then embedded in each model and Von Mises stress around the neck of each implant under a vertical loading of 200 N and Horizontal load of 50 N was calculated using finite element structural analysis software. The results were compared between the reconstructed mandible and their respective normal mandible. Results:Higher stress values were obtained for all the reconstructed types under horizontal loading and in reconstructed models involving larger area of reconstruction the stress were more. In the models involving smaller area of reconstruction like symphysis alone or body alone there is no significant change in the stress values on vertical loading. Conclusion:Stresses were comparatively smaller in mandibles involving a smaller area of reconstruction. Hence, fixed prosthesis could be advised and a bar retained over denture for reconstruction for larger area of reconstruction.Thiyaneswaran nesappan 1 , padma ariga 2

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The influence of functional forces on the biomechanics of implant-supported prostheses—a review

Cited by 288 publications

References 73 publications

Estudo comparativo das microdeformações resultantes de cargas estáticas axiais e não axiais em próteses de três elementos implantossuportadas

Estudo comparativo das microdeformações resultantes de cargas estáticas axiais e não axiais em próteses de três elementos implantossuportadas

Artificial Neural Networks Can be Used as Alternative Method to Estimate Loss Tooth Root Sizes for Prediction of Dental Implants

Comparison of Stresses Around Dental Implants Placed in Normal and Fibula Reconstructed Mandibular Models using Finite Element Analysis

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