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The International Journal of Prosthodontics



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Int J Prosthodont 31 (2018), No. 5     8. Oct. 2018
Int J Prosthodont 31 (2018), No. 5  (08.10.2018)

Page 440-442, doi:10.11607/ijp.5707, PubMed:29772033

Passivity of Fit of a Novel Prefabricated Implant-Supported Mandibular Full-Arch Reconstruction: A Comparative In Vitro Study
Karl, Matthias / Carretta, Roberto / Higuchi, Kenji W.
Purpose: To quantify the strain development of a new prefabricated implant-supported mandibular full-arch reconstruction.
Materials and Methods: Five resin models reflecting edentulous mandibles were each restored with three interforaminal implants and prefabricated frameworks with a novel compensation mechanism, cast frameworks, and computer-aided design/computer-assisted manufacturing (CAD/CAM)-fabricated frameworks. Strains were recorded during superstructure fixation. Statistical analyses (analysis of variance, t tests; α = .05) were based on level of misfit and distribution of misfit.
Results: Cast restorations showed significantly higher levels of misfit and a significantly more uneven distribution of misfit compared to prefabricated and CAD/CAM restorations (P < .05 for all comparisons). Prefabricated and CAD/CAM frameworks showed a similar low level and distribution of misfit (P = .24145 and P = .2837, respectively).
Conclusion: The compensation mechanism of the prefabricated frameworks provides a level of fit comparable to CAD/CAM superstructures.