SHEAR BOND STRENGTH OF SELF-ETCHING PRIMER SYSTEMS TO CONTAMINATED DENTIN IN PRIMARY TEETH

,; ,; ,

Journal of the Korean Academy of Pediatric Dentistry 2002;29(1):107-114.
Published online February 28, 2002.

SHEAR BOND STRENGTH OF SELF-ETCHING PRIMER SYSTEMS TO CONTAMINATED DENTIN IN PRIMARY TEETH

오염된 유치 상아질에 대한 자가 부식 프라이머의 결합강도에 관한 연구

서주희, 이광희, 김대업

원광대학교 치과대학 소아치과학교실, 원광치의학연구소

Abstract

The purpose of this study was to determine and compare the shear bond strength of two self-etching primer systems to primary teeth contaminated with saliva and blood. Clearfil SE Bond and AQ Bond were evaluated. One hundred specimens were made by seventy-five deciduous teeth(fifty anterior and twenty-five posterior teeth) and divided randomly into ten groups. Small flat dentinal surfaces were prepared by grinding the buccal, lingual and labial areas. Specific surface treatments were applied to each group: (1) a self-etching primer application(control group), (2) saliva contamination followed by primer(Group I), (3) primer curing followed by saliva contamination (Group II), (4) blood contamination followed by primer(Group III), (5) primer curing followed by blood contamination(Group IV). After bonding of composite resin(Z100, 3M, USA) to contaminated sample surfaces and thermocycling(1,000 cycles), shear bond strengths were measured using Universal Testing Machine(Zwick Z020, Zwick Co., Germany). The results were as follows; 1. Group I showed lower shear bond strength than control group but no statistically significant difference was found(P>0.05). 2. Group II and blood contamination group(Group III & IV) showed significantly lower shear bond strength than control group(P<0.01). 3. The shear bond strength of Clearfil SE Bond was significantly higher than that of AQ Bond(P<0.05).

Key Words: Self-etching primer, Shear bond strength, Primary teeth, Blood contamination, Saliva contamination