Resumo

BUENO TORCATO, Leonardo et al. Stress analysis in different implant/abutment connections. Rev. cir. traumatol. buco-maxilo-fac. [online]. 2016, vol.16, n.1, pp. 7-12. ISSN 1808-5210.

The aim of this study was to compare, by means of aphotoelastic analysis, the stresses generatedin the periimplantar regionof different implant/abutment connections. 4 modelswere fabricatedinphotoelastic resinwithsingle dental implantandstandardheight crowns. Mod 1: External Hexagon; Mod 2: Internal Hexagon; Mod 3: Morse-Taper and Mod4: One-Piece. It were applieda 100N axial and oblique (45°) loading by means of a universal testing machine. The loadwas appliedat standardized points on the occlusal surface. The results were recordedphotographicallyusinga digital camera andanalyzed qualitativelywiththeaid of the AdobePhotoshop software. Both inaxial and in the oblique loading, it was observed that one-piece implantshowed the highest number of fringes, apart from the internal connection implants. The differencebetween the models,whenthedirection of the load was changed, occurred duetotheoblique loading that caused greaternumber of fringes concentrated not onlyin the apical region, but also in the opposite side of the load application in the cervical region. It was concluded thattheinternal connection implants presented themost favorablebiomechanical situationand the one-piece implant presented the higheststress concentration.

Palavras-chave : Dental Implants; Biomechanics; Dental Implant-Abutment Design.