상아질 접착제의 전단결합강도 및 주사전자현미경적 연구
A study on the shear bond strength and scanning electron microscopic investigation of dentin bonding agents.
이기환, 양영채,
소속 상세정보
이기환 ( ) - 원광대학교
양영채 ( ) - 원광대학교
KMID : 0362319950200010289
Abstract
The purpose of this study was to estimate the shear bond strength and observe the fractured and interfacial surfaces of various dentin bonding agents used conjunction with a visible light cured composite. The senentytwo human premolars and molars
extracted due to periodontal or orthodontic reasons were used and randomely divided into six groups.
All the prepared dentin surfaces were treated with Superbond D-liner, Scotchbond Multi-Purpose, All-Bond 2 and Prisma Universal Bond 3 accroding to the manufacturer's instructions.
Six specimens were then demineralized in 10% HCI for 24 hours and the other six specimens were not demineralized in order to observe the interfacial surfaces with Hitachi X-450 SEM at 25Kv. Also shear bond strength were obtained using an Instron
Testing
Machine with a crosshead speed of 1mm/min.
@ES The following results were obtained :
@EN 1. Although shear bond strength of Superbond D-Liner(17.35 MPa) and Scotch-bond Multi-Purpose group(17.29 MPa) were higher than the All-Bond 2(12.80 MPa) and Prisma Universial Bond 3 (13.43 MPa), there were no significant staustic differences
in the
shear bond strength between4 groups.(P<0.05)
As a result of etching to dentin in Prisma Universial BOND 3 experimentally, the resin tag was formed, but shear bond strength was decreased.
2. The resin tag ;into the opened dentinal tubule was formed in Superbond D-Liner, Scotch -bond Multi-Purpose, All-Bond 2 (etching) and Prisma Universial Bond 3(etching), but not in the All-Bone 2 and Prisma Universial Bond 3(non-etching).
3. Strong, durable bonds between dentin and dentinal bonding agents are essential, not only resin tag into the dentianl tubules, but also hybrid layer.
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