4Gottehrer N R, Seeger A, Tschemitschek H. Placement of thepreparation line and periodontal health-a prospective 2 -yea rclinical study[J]. Dent Today, 2003,22 ( 1 ) : 64-69.
5Newell D H, John V, Kim S J. Atechnique of occlusal adiustment for food impaction in the presence of tight proximal contacts[J]. Ope Dent, 2002,27 ( 1 ) : 95-100.
2Colgan CM. Paradental cysts: a role for food impaction in the pathogenesis? A review of cases from Northern Ireland British [J]. Journal of Oral & Maxillofacial Surgery, 2002, 40(2):163-168
3Burke FJ, Crisp RJ, James A, et al. Two year clinical evalua- tion of a low-- shrink resin composite material in UK general dental practices [J]. Dent Mater, 2011, 27(7) : 622--630.
4Salz U, Bock T. Testing adhesion of direct restoratives to dental hard tissue -- a review[J]. J Adhes Dent, 2010, 12(5): 343--371.
5Salz U,Bock T. Testing adhesion of direct restoratives to dental hard tissue-a review[J]. J Adhes Dent,2010,12(5):343-371.
6Cramer NB, Stansbury JW, Bowman CN. Recent advances and developments in composite dental restorative materials[J]. J Dent Res,2011,90(4):402-416.