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.
2012-02-28
Eng.
The International journal of prosthodontics
Department of Prosthodontics, National and Kapodistrian University, Athens, Greece.
Int J Prosthodont. ;25(2):170-2
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