6Hollander DA, von Waltera M, Wirtzb T, et al. Structural, mechanical and in vitro characterization of individually struc- tured Ti-6A1-4V produced by direct laser forming[ J]. Bio- materials, 2006,27 (7) :955 - 963.
7Rho JY, Roy ME 2nd, Tsui TY, et al. Elastic properties of microstructural components of human bone tissue as meas- ured by nanoindentation[ J]. J Biomed Mater Res, 1999,45 (1) :48 -54.
8Cosyn J, Hooghe N, De Bruyn H. A systematic review on the frequency of advanced recession following single immedi- ate implant treatment [ J]. J Clin Periodontol, 2012, 39 (6) :582 -589.
9Koh RU, Rudek I, Wang HL. Immediate implant place- ment : Positives and negatives [ J ]. Implant Dent, 2010,19 (2) :98 - 108.
3[1]Branemark PI. Osseointegration and its experimental background. J Prosthetic Dent, 1983, 50(3): 399
4[2]Jaffin RA, Berman CL. The excessive loss of branemark fixtures in type iv bone: a 5-year analysis. J Periodontal, 1991,62(1) :2
5[3]Kademo B, Lausmaa J. Surface science aspects on inorganic biomaterials. CRC Crit Rev Biocomp, 1986,2:335
6[5]Ducheyne P, Qiu Q. Bioactive ceramics: The effect of surface reactivity on bone formation and bone cell function. Biomate rials, 1999, 20(23-24):2287
7[6]Kim HY, Miyaji F, Kokubo T, et al. Preparation of bioactive Ti and its alloys via simple chemical surface treatment. J Biomed Mater Res, 1996, 32(2) :409
8[7]Chehroudi B, Mcdonnell D, Brunette DM, et al. The effects of micromachined surface on formation of bonelike tissue on subcutaneous implants as assessed by radiography and com puter image processing. J Biomed Mater Res, 1997, 34(3):279
9[8]Webster TJ, Ergun C, Doremus RH, et al. Enhanced osteo clast like cell function on nanophase ceramics. Biomaterials, 2001, 22(11):1327
