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The International Journal of Prosthodontics

Edited by George A. Zarb, BChD, DDS, MS, MS, FRCD(C)

ISSN 0893-2174

March/April 2012
Volume 25 , Issue 2

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X-ray Microtomographic Evaluation of the Influence of Two Preparation Types on Marginal Fit of CAD/CAM Alumina Copings: A Pilot Study

Maria-Eirini Krasanaki, DDS, MSc/Stavros Pelekanos, DDS, Dr Med Dent/Marina Andreiotelli, DDS, Dr Med Dent/Spiridon-Oumvertos Koutayas, CDT, DDS, Dr Med Dent/George Eliades, DDS, Dr Dent

Pages: 170172
PMID: 22371840

This study evaluated the influence of two preparation types on the marginal fit of computer-aided design/computer-assisted manufacture (CAD/CAM) alumina copings. Two subgroups of four alumina copings each were fabricated using alumina master dies with either a chamfer or 90-degree shoulder preparation. Copings were scanned with an x-ray microtomographic scanner, and marginal fit was evaluated. The preparation types presented no statistically significant differences regarding marginal gap (P = .410) and absolute marginal discrepancy (P = .229). No correlation was found between marginal fit of CAD/CAM alumina copings and preparation type. Marginal fit could be considered within the limits of clinical acceptance. Int J Prosthodont 2012;25:170172.

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