In vitro study of furcal perforation repaired with direct composite inlays

JIE You-qiong; YIN Shi-hai; WANG Mi; ZOU Ling

Abstract：AIM: To evaluate the effect of furcal perforation treated with direct composite inlays, including both morphologic and microleakage study. METHODS: 40 newly extracted human maxillary and mandibular molars were collected. In 36 of them, perforations were made in the center of the pulp chamber floors by using the #4 high -speed round bur, the other 4 were kept integrity. 36 samples were divided randomly into three experimental groups, 12 in each. The other intact 4 samples were used as the negative controls. In the experimental groups, perforations were repaired as follows. The samples of group A were repaired directly by composite resin. The samples of group B were repaired by direct composite inlays. The samples of group C were repaired by indirect composite inlays. AH - plus was used in all samples as cement. Then 6 of them were evaluated under SEM, and microleakage of others was measured by the concentration of leaked glucose with the enzymatic GOD - POD method. RESULTS: After restoration, the furcal appearances in group B and group C were recovered better than group A. Leakage of group B and C was obviously lower than group A(P<0.05). But had no statistical difference(P>0.05)between group B and group C. CONCLUSION; For repairing furcal perforation, the method of direct composite inlays is a good new way as the indirect composite inlays