인공타액 오염이 수종 상아질접착제와 상아질간의 결합에 미치는 영향 = INFLUENCE OF ARTIFICIAL SALIVA CONTAMINATION ON BONDING OF DENTIN ADHESIVES TO DENTIN

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the influence of artificial saliva contamination on bonding of several dintin adhesives to dentin.
Sixty-three human molar teeth extracted within a month were used. Each tooth was sectioned longitudinally in a buccolingual direction to obtain 126 wpecimens. These specimens were randomly divided into three froups and were treated by Scotchbond 2, Gluam and All vond. Each group was subdivided into three subgroups; normal group not contaminated with artificial saliva, contaminated with artificial saliva and dried group, and contaminated with artificial saliva and washed and dried group.
Enamel/dentin bonding agent (Dental Adhesive of Scotchbond 2) was applied light cured on the treated dentin surfaces. Threrafter P-50 were cured on them, and specimens were storde in 37℃ artificial saliva for 24 hours before measuring shear bond strength.
Shear bond strengths were determined using an universal testing machine with cross head speed 1mm/min and SEM examinations were conducted to evaluate the resin-dintin interface and degree of penetrating resin string into the dentinal tubules.
The following results were obtained.
1. Normal gropqs ont contaminated with artificial saliva showed greater shear bond streagth than any other group contaminated with artificial saliva)P<0.01).
2. The shear bond strengths showed no significant difference between washed groups with distilled water and ont washed groups after contamination with artificial saliva(P>0.05).
3. In normal groups, the shear bond strength of A group was significantly greater than in any other group(P<0.01).
4. In S and G groups, fractrues after shear bond strength tests occured adhesively on resintooth interface in all specimens. But in A groups, fractrue of the normal group occured cohesively in dentin and fractrue of the contaminated groups coourde adhesively and cohesively.
5. On SEM examination, the number of resin strings penotrated into dentinal tubules were the greatest in normal groups, followed by, in descending oredr, wasghed groups and not washed groups after contamination with artificial saliva.