Please use this identifier to cite or link to this item:
http://acervodigital.unesp.br/handle/11449/74757
- Title:
- Stress distribution in implant-supported prosthesis with external and internal implant-abutment connections
- Universidade Estadual Paulista (UNESP)
- 0001-6357
- 1502-3850
- Objective. This study aimed to investigate the stress distribution in screwed implant-supported prostheses with different implant-abutment connections by using a photoelastic analysis. Materials and methods. Four photoelastic models were fabricated in PL-2 resin and divided according to the implant-abutment connection (external hexagon (EH) and Morse taper (MT) implants (3.75 × 11.5 mm)) and the number crowns (single and 3-unit piece). Models were positioned in a circular polariscope and 100-N axial and oblique (45) loading were applied in the occlusal surface of the crowns by using a universal testing machine. The stresses were photographically recorded and qualitatively analyzed using software (Adobe Photoshop). Results. Under axial loading, the MT implants exhibited a lower number of fringes for single-unit crowns than EH implants, whereas for a 3-unit piece the MT implants showed a higher number of fringes vs EH implants. The oblique loading increased the number of fringes for all groups. Conclusion. In conclusion, the MT implant-abutment connection reduced the amount of stress in single-unit crowns, for 3-unit piece crowns the amount of stress was lower using an external hexagon connection. The stress pattern was similar for all groups. Oblique loading promoted a higher stress concentration than axial loading. © Informa Healthcare.
- 1-Mar-2013
- Acta Odontologica Scandinavica, v. 71, n. 2, p. 283-288, 2013.
- 283-288
- Biomechanics
- Dental implants
- Fixed prosthesis
- Photoelastic stress analysis
- Screw retained
- biomechanics
- dental abutment
- human
- theoretical model
- tooth implant
- Dental Implant-Abutment Design
- Dental Implants
- Humans
- Models, Theoretical
- http://dx.doi.org/10.3109/00016357.2012.672823
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/74757
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