1. 1) Leyens C, Peters M. Titanium and titanium alloys: Fundamentals and applications, Wiley-VCH, Weinheim, 2003, pp.425-427.
2. 2) Ferracane J. Materials in dentistry: Principles and applications, Lippincott Williams & Wilkins, Baltimore, Maryland, 2001, p.285.
3. 3) Gladwin M, Bagby M. Clinical aspect of dental materials: Theory, practice, and cases, Lippincott Williams & Wilkins, Baltimore, Maryland, 2004, pp.167-168.
4. 4) Shibata K, Kamegai A. Titanium in dentistry: Biocompatibility of titanium. Quintessence, Tokyo, 1988, pp.35-41.
5. Skin Holes of Titanium Casting