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Relation Between Cavity Design and Marginal Adaptation in a Machine‐milled Ceramic Restorative System by K. Sato; H. Matsumura; M. Atsuta is a Dentistry article available to read on EtoBox.

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The purpose of the current study was to evaluate the influence of inclination of the cusp as well as convergence/divergence of the cavity wall on marginal adaptation in a machine‐milled ceramic restorative system. Sixty inlay specimens were prepared from a pre‐fabricated feldspathic porcelain (Vitablocs Mark 2) by means of a computer integrated manufacturing system (Cerec 2). Specimens were divided into 12 groups according to original cavity preparations consisting of four inclinations of the cusp (0°, 15°, 30° and 45°) and three types of cavity form (tapered box, regular box, and undercut box). The restorations were cemented with a dual‐activated luting agent (Clapearl DC) and cut into two halves with a low speed cutting saw, after which adaptation at the occlusal surface of each inlay specimen was measured with a microscope. The results showed that the inclination of the cusp did not affect adaptation of the restorations (__P__ > 0 ̇05), whereas the inlay specimens inserted into undercut cavity preparation exhibited significantly poor adaptation as compared with those inserted into regular and tapered cavities in two inclinations of the cusp (0° and 15°; __P__ < 0 ̇05). The exper

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Author

K. Sato; H. Matsumura; M. Atsuta

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0305-182X)

Published

2002

Language

EN

Field

Dentistry (Health Sciences)