Correlation Engine 2.0
Clear Search sequence regions


Sizes of these terms reflect their relevance to your search.

This study aimed to investigate the stress distribution in screwed implant-supported prostheses with different implant-abutment connections by using a photoelastic analysis. 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). 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. 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.

Citation

Marcelo Coelho Goiato, Aldiéris Alves Pesqueira, Rosse Mary Falcón-Antenucci, Daniela Micheline Dos Santos, Marcela Filié Haddad, Lisiane Cristina Bannwart, Amália Moreno. Stress distribution in implant-supported prosthesis with external and internal implant-abutment connections. Acta odontologica Scandinavica. 2013 Mar;71(2):283-8

Expand section icon Mesh Tags

Expand section icon Substances


PMID: 22486241

View Full Text