6U noS ,T anakaT ,In oueS, et al. The influence of configuration factors on cavity adaptation in compomer restorations [ J ]. Dent Mater ,1999,18:19-31.
7Giachetti L, Scaminali Russo D, Bambi C, et al. A review of polymerization shrinkage stress :current techniquiccs for posterior direct resin restorations [ J ]. J Contemp Dent Pract, 2006,7 (4) :79 -88.
8Richard VN. Introduction to Dental Materials [ M]. 2nd ed. St. Louis : Mosby Company, 2002.
9[1]Katz R V.Prevalence and intraoral distribution of root caries in an adult population caries kes[J].J Ent Kes,1982,16(5):261
10[3]A S AL Helal,S R Armstrong,X.J Xie,et al.Effect of Smear Layer on Root Demineralization Adjacent to Resin-modified Glass Lonomer[J].J Dent Res,2003,82(2):146～150
6Nicolau B, Srisilapanan P, Marcenes W. Number of teeth and risk of root caries [ J]. Gerodontology, 2000,17 (2) :91-96.
7Geraldo-Martins VR,Lepri CP,Palma-Dibb RG. Effect of different root caries treatments on the sealing ability of conventional glass ionomer cement restorations[J]. Lasers Med Sci,2012,27(1) :39-45.
8A1 Hamad KQ, Azar WZ, Alwaeli HA, et al. A clinical study on the effects of cordless and conventional retrac- tion techniques on the gingival and periodontal health[J]. J Clin Periodontol, 2008,35 (12) : 1053-1058.
9Phatale S,Marawar PP,Byakod G,et al. Effect of retrac- tion materials on gingival health: A histopathological study[J]. J Indian Soc Periodont01,2010,14(1) : 35-39.
