1. R.G. Craig, ed., Restorative Dental Materials, 10th ed. (St. Louis, MO: Mosby, 1997), p. 350.
2. K.J. Anusavice, Phillips’ Science of Dental Materials, 10th ed. (Philadelphia, PA: W.B. Saunders Co., 1996).
3. M. Chiba, personal communication. Selec Co., Ltd., Osaka, Japan.
4. Y. Tani, Titanium: From Mining to Biomaterials. Proceedings of the Wollongong Symposium, ed. A.J. Jones (Canberra, Australia: Department of Industry, Technology and Commerce, 1991), pp. 47–54.
5. E. Berg, J. Dent., 25 (1997), pp. 113–117.