Fundamentals of Operative Dentistry by James B. Summitt

Author:James B. Summitt
Language: eng
Format: epub, pdf
ISBN: 0867154527
Publisher: Quintessence Publishing Co, Inc

Fig 10-9 Abrasion wear occurs across the entire occlusal surface of the resin composite. (a) The softer resin is preferentially worn away, exposing the harder filler particles. (b) Eventually, enough of the filler particle is exposed so that it is “plucked” from the surface of the resin composite.

Fig 10-10 (a) Abrasion wear has traditionally been a problem with posterior resin composite restorations. A cast reveals generalized wear of the posterior resin composite restorations in the maxillary right first and second molars and second premolar. In addition, proximal wear has resulted in broad, flat contacts and loss of arch length. The material used was an early, larger-particle resin composite. (b)Scanning electron photomicrograph of a posterior tooth that, several years previously, had been restored with an early-generation (large-filler-particle) resin composite. Note the severe loss of restorative material.

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