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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
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
  • 0001-6357
  • 1502-3850
Abstract: 
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.
Issue Date: 
1-Mar-2013
Citation: 
Acta Odontologica Scandinavica, v. 71, n. 2, p. 283-288, 2013.
Time Duration: 
283-288
Keywords: 
  • 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
Source: 
http://dx.doi.org/10.3109/00016357.2012.672823
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/74757
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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