A Digital Image Correlation Analysis of Strain Generated by 3-Unit Implant-Supported Fixed Dental Prosthesis: An In Vitro Study

作者：Peixoto Raniel F; Macedo Ana P; Martinelli Janisse; Lapria Faria Adriana C; Tiossi Rodrigo; Ribeiro Ricardo F; de Mattos Maria da G C

来源：Implant Dentistry, 2017, 26(4): 567-573.

DOI：10.1097/ID.0000000000000588

• dental implants
• dental veneers
• stress distribution

Objective: To evaluate the influence of different veneering materials (porcelain and resin) and implants (short and conventional) in the strain distribution of implant-supported splinted fixed partial dentures (FPDs) using digital image correlation (DIC).
Material and Methods: Four polyurethane models were fabricated with resin replicas (first premolar) and short and/or conventional implants replacing the second premolar and first and second molars, according to the following configurations: G1, 2 conventional (second premolar and first molar) and 1 short (second molar) implant; G2, 1 conventional (second premolar) and 2 short (first and second molar) implants; G3, 3 short implants; G4, 3 conventional implants. Porcelain- and resin-veneered splinted FPDs were screwed to the implant abutments. The DIC system was used to calculate strains during application of occlusal load (250 N).
Results: Porcelain- and resin-veneered showed similar strain distribution for all groups (P > 0.05). Concentration of compressive strains was higher in G3P and G3R with maximum compressive strains of -1271.50 and -1026.88 mu s, respectively. G4 transferred the best strain distribution (porcelain, -275.14 mu s; resin, -254.44 mu s), followed by G2 (porcelain, -306.79 mu s; resin, -310.63 mu s).
Conclusion: The veneering material used did not influence the strain distribution. In addition, conventional implants generate less strain concentration, although the combination of 2 short and 1 conventional implant seems to be a viable plan.

• 出版日期2017-8