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Published on: May 30, 2019
Evaluation of impression accuracy for implant at various angulations
Wirley Gonçalves Assunção1, Rebeca Cavalcante Britto, Valentim Adelino Ricardo Barão
1Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Araçatuba Dental School, São Paulo, Brazil 16015-050. wirley@foa.unesp.br
Purpose:
The purpose of this study was to compare 2 splinted impression transfer techniques for implant-supported prostheses.
Materials:
A metal matrix (control) with 4 implants was used. The implants were positioned at 90, 80, 75, and 65 degrees in relation to the surface of the matrix. Squared impression copings were splinted with self-curing acrylic resin in group 1 (n = 10) and with condensation silicone in group 2 (n = 10). A computer software was used to measure the implants/analogs inclinations. Data were analyzed by 2-way analysis of variance and Tukey test (alpha <0.05).
Results:
There was significant difference between groups, implant/analog inclinations, and interaction between them (P < 0.05). Group 1 had no significant difference from the control (P > 0.05) nor from group 2 (P > 0.05) regardless implant/analog inclinations. Considering implant/analog inclinations, both techniques did not differ from control group (P > 0.05), except for 75 degrees implant/analog inclinations (P < 0.05).
Conclusion:
The results suggest that condensation silicone may not be used as an alternative splinting material. Furthermore, implant inclination may affect master cast accuracy.
