Comparative Microstrain Study of Internal Hexagon and Plateau Design of Short Implants Under Vertical Loading.

Autor:	Nishioka RS; Professor, Department of Dental Materials and Prosthodontics, School of Dentistry, Julio de Mesquita Filho, São Paulo State University, UNESP, São José dos Campos, Brazil. †PhD Student, Department of Dental Materials and Prosthodontics, School of Dentistry Julio de Mesquita Filho, São Paulo State University, UNESP, São José dos Campos, Brazil. ‡Master's Student, Department of Dental Materials and Prosthodontics, School of Dentistry, Julio de Mesquita Filho, São Paulo State University, UNESP, São José dos Campos, Brazil. §Professor, Department of Surgery, School of Dentistry, São Paulo State University, UNESP, Araçatuba, Brazil., Rodrigues VA, De Santis LR, Nishioka GN, Santos VM, Souza FÁ
Jazyk:	angličtina
Zdroj:	Implant dentistry [Implant Dent] 2016 Feb; Vol. 25 (1), pp. 135-9.
DOI:	10.1097/ID.0000000000000345
Abstrakt:	Purpose: To quantify microstrain development during axial loading using strain gauge analysis for short implants, varying the type of fixture-abutment joint and thread design. Materials and Methods: An internal hexagon implant (4 × 8 mm) and a plateau design implant (4 × 8 mm) were embedded on the center of 10 polyurethane blocks with dimensions of 190 × 30 × 12 mm. The respective abutments were screwed onto the implants. Four strain gauges (SGs) were bonded onto the surface of each block, and 4 vertical SGs were bonded onto the side of each block. Axial load of 30 kgf was applied for 10 seconds in the center of each implant. Results: The data were analyzed statistically by analysis of variance for repeated measures and Tukey test (P < 0.05). The interaction between implant and region factors have been statistically significant (P = 0.0259). Tukey test revealed a difference on plateau's horizontal region. The cervical region presented higher microstrain values, when compared with the medium and apical regions of the implants. Conclusion: Within the purpose of the study, the type of fixture-abutment joint is a relevant factor to affect the amount of stress/strain in bone simulation. The microstrain development was concentrated on the cervical region of the implant.
Databáze:	MEDLINE
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