1. S. CANAY and M. �ktemer, Quintessence Int. 23 (1992) 279.
2. J. GEIS-GERSTORFER, J. Dent. 22 (1994) 247.
3. M. NAKAGAWA, M. OHTA, S. MATSUYA and T. SHIRAISHI, Compatibility of Biomedical Implants, Proceedings Volume 94-15, Electrochem. Soc. (1994) p. 285.
4. R. G. CRAIG and C. T. HANKS, J. Dent. Res. 69 (1990) 1539.
5. J. C. WATAHA, R. G. CRAIG and C. T. HANKS, J. Dent. Res. 68 (1989) 322 (abstr No. 1122).