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The sealing properties of temporary filling materials

1988; Elsevier BV; Volume: 60; Issue: 3 Linguagem: Inglês

10.1016/0022-3913(88)90271-5

1097-6841

E.L. Pashley, L. Tao, D.H. Pashley,

Dental Radiography and Imaging

R ecent articles suggest that many of the reported pulpal reactions to restorative materials may have been the result of microleakage of bacterial products around the restorations instead of the direct effect of the materials.‘-’ In such studies negative controls usually included cavities restored with zinc oxide-eugenol (ZOE) because it demonstrated little microleakage.6s7 However, Browne and Tobias,” in a review of the literature, suggested that the modest pulpal response reported beneath ZOE restorations may be the result of the antimicrobial properties of ZOE instead of its superior sealing qualities. Thus the sealing properties of ZOE and other temporary fillings warrant careful evaluation if investigators wish to use appropriate negative controls, namely, materials that seal perfectly. This study quantitatively evaluated the sealing properties of regular and reinforced ZOE, gutta-percha (GP), Cavit-G, (Premier Dental Products Co., Norristown, Pa.) and polycarboxylate cement placed in class I cavities prepared in extracted human third molars, by using the fluid filtration method described by Derkson et al.9 The results demonstrate the importance of the materials and their powder-to-liquid ratios in achieving a good seal between the filling materials and the cavity wall.