Photoelastic comparison of single tooth implant-abutment-bone of platform switching vs conventional implant designs
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Data
2011-03-01
Autores
Rossi, Fabiana
Zavanelli, Adriana Cristina [UNESP]
Zavanelli, Ricardo Alexandre
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Resumo
Objectives: The maintenance and stability of peri-implantar soft tissue seem to be related to the crestal bone around the implant platform and different implant designs connections might affect this phenomenon. The aim of this study was to evaluate by photoelastic analysis the stress distribution in the cervical and apical site of implant-abutment interface of conventional implant joints (external hex, internal hex and cone morse) and compare to the novel platform switching design. Materials and methods: It was fabricated photoelastic models using five different implant-abutment connection, one set of external hex (Alvim Ti, Neodent, Curitiba, Brazil), one set of internal hex (Full Osseotite, Biomet 3i, Florida, USA), one cone morse set (Alvim CM, Neodent, Curitiba, Brazil), and two sets of internal hex plus platform switching concept (Alvim II Plus, Neodent, Curitiba, Brazil) (Certain Prevail, Biomet 3i, Florida, USA). These models were submitted to two compressive loads, axial from 20 kgf (load I) and another (load II), inclined 45° from 10 kgf. During the qualitative analysis, digital pictures were taken from a polariscope, for each load situation. For the quantitative analyses in both situations of load, the medium, minimum and maximum in MPa values of shear strain were determined in the cervical and apical site. The Kruskal-Wallis test was used to compare the results between the different systems and between cervical and apical site were compared using Mann-Whitney U test. Results: The results from qualitative analysis showed less concentration of strain in the cervical area to the internal hex plus platform switching (Certain Prevail), in both situation of load. The same results were get in the quantitative analysis, showing less stress concentrations around the implant Certain Prevail with internal hex plus the novel design (17.9 MPa to load I and 29.5 MPa to load II), however, without statistical significant difference between the systems. Conclusion: The minor stress concentration strongly suggest the use of platform switching design as a manner to prevent bone loss around the implant-abutment platform. Clinical Significance: From the result of this study its possible to make clinical decision for implant system which provides implant components with platform switching characteristics.
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Palavras-chave
Dental implants, Implant-abutments, Photoelasticity, Platform switching, alveolar bone loss, comparative study, compressive strength, computer simulation, dental procedure, elasticity, human, light related phenomena, medical photography, methodology, nonparametric test, shear strength, tooth implantation, Alveolar Bone Loss, Compressive Strength, Computer Simulation, Dental Implant-Abutment Design, Dental Implants, Single-Tooth, Dental Stress Analysis, Elasticity, Humans, Optical Phenomena, Photography, Dental, Shear Strength, Statistics, Nonparametric
Como citar
Journal of Contemporary Dental Practice, v. 12, n. 2, p. 124-130, 2011.