Evaluation of fit of zirconia posterior bridge structures constructed with different scanning methods and preparation angles.

Odontology
Raquel Castillo OyagüeAndrés Sánchez Turrión

Abstract

This study evaluated the influence of scanning method, abutment position, and preparation angle on the vertical seal of three-unit posterior zirconia structures. Sixty differently angled metallic models were machined to receive 30 bridge frameworks. For each preparation type, half of the structures were waxed-up and digitized, whereas the other half were computer-designed after the abutments were scanned. Once milled, the samples were cemented in standard fashion. Misfit was assessed by scanning electron microscopy. Three-way analysis of variance showed significant differences. Computer-designed structures achieved the highest accuracy (P < 0.0001). No significant differences were recorded concerning the abutment position and convergence angle. All discrepancy values were within the clinically acceptable range.

References

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Citations

Jun 24, 2014·Journal of Oral Rehabilitation·P BoitelleO Fromentin
Oct 19, 2016·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Verónica RodríguezMaría-Jesús Suárez-García
Mar 7, 2015·Clinical Oral Investigations·Anke PodhorskyBernd Wöstmann
Oct 13, 2020·Journal of Prosthodontic Research·Yolanda FreireMaria J Suarez

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