수종 상아질접합 수복재의 전단응력 및 파절형태에 관한 연구
A Study of Shear Stress and Fracture Pattern of Various Dentin Bonding Restorative Materials
서병설, 이종철,
소속 상세정보
서병설 ( ) - 서울대학교
이종철 ( ) - 서울대학교
KMID : 0362319860120010095
Abstract
For the purpose of obtaining a basic data in selecting a suitable material with clinical care, this study was designed to measure the shear stress and to examine the fracture pattern of various dentin bonding restorative materials using 43 extracted bicuspids.
The following results were obtained.
1. In dentin, Silux/Scotchbond group showed the highest value (34.5±14.7㎏/㎠) and Fuji Ionomer Type Ⅱ group and Heliosit/Dentin-Adhesit group showed almost same bond strength in the next place. Durafill/Dentin-Adhesive group showed an infinitesimal value. (3.1±1.4㎏/㎠)
2. Every group showed no difference in bond strength between upper and lower teeth. Between buccal and lingual surfaces. Fuji Ionomer Type Ⅱ and Durafill/Dentin-Adhesive groups showed too. But, in Silux/Scotchbond and Heliosit/Dentin-Adhesit groups, it was shown that the bond strength in lingual was stronger than in buccal.
3. There was resin fractured with cohesive fracture of bonding agent in Enamel group. In dentin, adhesive-cohesive fracture and adhesive fracture were shown.
4. The stronger bond strength was, the more frequently cohesive fracture occurred. Dentin-Adhesit group showed specific shining appearance as if varnish became hard.
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