6[2]Ingber, J.S., Rose, L.F., Coslet, J.G. The biologic widtha concept in periodontics and restorative dentistry[J]. Alpha Omega, 1977, 70:62 ～ 65
7[3]Bragger, U, Lauchenauer, D, Lang, N.P. Surgical crown lengthening of the clinical crown[J]. Journal of Clinical Periodontology, 1992, 19:58～ 63
8[4]Wagenberg, B.D., Eskow, R.N., Langer, B. Exposing adequate tooth structure for restorative dentisty[J]. International of Periodontics and Restorative Dentistry, 1989, 5:321 ～332
9[5]Gargiulo, A.W.,Wentz, F.,Orban, B. Demensions and relations of the dentogingival junction in humans[J]. Journal of Periodontology, 1961, 32:261 ～ 267
10[6]OaKley, E., Rhyu, I.C., Karatzas, S.,et, al. Formation of the Biologic Width Following Crown Lengthening in Nonhuman Primates[J]. Int J Periodont Rest Dent, 1999,19:529-541
