1) Greenlee, T. K. , Beckham, C. A. , Crebo, A. and Malmorg, J. C. : Glass ceramic bone imp-lants. A light microscopic study. J. Biomed. Mater. Res. 6: 235-244, 1972.
2) Hench, L. L. and Paschall, H. A. : Histoche-mical responses at a biomaterial's interface. J. Biomed. Mater. Res. Symp. 5: 49-64, 1974.
3) Clark, A. E. , Hench, L. L. and Paschall, H. A. : The influence of surface chemistry on implant interface histology: A theoretical basis for implant materials selection. J. Bio-med. Mater. Res. 10: 161-174, 1976.
4) Brent, E. M. and Shapiro, P. A. : A method of obtaining an epithelial attachment on an endosseous implant. J. Prosthet. Dent. 45: 550-557 1981.
5) Strunz, V. , Bunte, M. , Stellmack, R. , Gross, U. M., KOhl, K. and Deutscher, K. : Bioactive Glaskeramic als lmplantatmaterial in der Ki-eferchirurgie. Dtsch. Zahnarztl. Z. 32: 287-290, 1977.