Adhesion to Dentin Observed on Histopathological Sections.

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  • 病理組織標本に見る接着

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Abstract

Histopathological pulp study is a routine procedure to evaluate possible pulp damage caused by the restorative material/procedure. During histological section preparation, extracted teeth are demineralized and restorations have to be removed from the preparations in order to cut thin sections. Adhesive resin restorations bonding to dentin sometimes make removal of fillings difficult due to strong adhesion to dentin even after demineralization of the teeth. The aim of the present study was to evaluate cohesive failure and cracks of dentinal cavity walls/floor produced during fillings removal using histological sections obtained in three studies.<BR>Cohesive failures and cracks of dentin walls/floor were usually observed on the histological sections, but their magnitude and frequency depended on the adhesive system used and dwell time of the restorations. Panavia EX and Orthomite Super Bond placed in phosphoric acid etched cavities showed 40 to 60% cohesive failure and cracks of cavity walls initially, but they decreased gradually as dwell time increased. Clearfil Photo Posterior and Photo Bond placed in phosphoric acid etched cavities with and without SA primer showed 80 to 90% cohesive failure and cracks of the dentin, but showed no decrease of cohesive failure and cracks with time. Palfique inlays placed in 10-3 totally etched cavities showed the highest rate of cohesivefaliure of the dentin floor in the present study, but only enamel etching produced the highest rate of adhesive failure.

Journal

  • Adhesive Dentistry

    Adhesive Dentistry 13 (2), 40-47, 1995

    Japan Society for Adhesive Dentistry

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