The purpose of this study was to evaluate the degree of marginal leakage that is made by wet bonding to dentin and dissolution of dentinal collagen layer in vivo and in vitro. Class V cavities were prepared to 32 cat's canine teeth and they were
randomly assigned into the following 4 groups : Group 1(not acid conditioned); Group 2 (acid-conditioned and blot-dried) ; Group 3 (acid-conditioned and air-dried for 30 seconds) ; Group 4 (acid conditioned and retreated with 10% NaOCl solution).
The
acetone-based primer and bonding agent of All Bond 2(Bisco Inc., U.S.A.) and composite resin(Z-100, 3M. Dent. Prod., U.S.A.) were then applied. The resin collar and cap attached to each specimen and 50% silver nitrate solution was placed inside
the
resin cap for 3 hours. After the canine tooth was resected in level of cervical third, specimens were highly polished and observed the degree of the dye penetration on incisal and gingival margins.
@ES The results were as follows;
@EN 1. There was no significant difference of marginal leakage in all the groups between in vivo and in vitro.
2. In vivo, the degree of leakage on the gingival margin showed the lowerest in group 4 and followed by group 2, 3 and group 1 with ascending order. However, there was no statistical difference among all the groups(p>0.05).
3. In vitro, the degree of leakage on the gingival margin showed the lowerest in group 2 and followed by group 4, 3 and group 1 with ascending order. However, there was no significant difference among the experimental groups(p>0.05).
4. The marginal leakage of the incisal margin in vitro was significantly higher in group 1 than the remaining groups(p<0.05).
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