1. Caputo A Standlee JP Biomechanics in Clinical Dentistry Quintessence 1987
2. Evaluation of resistance form of dislodged crowns and retainers;Trier;J Prosthet Dent,1998
3. Clinical marginal and internal gaps of Procera AllCeram crowns;Kokubo;J Oral Rehabil,2005
4. An in-vitro investigation of the accuracy of fit of Procera and Empress crowns;Fleming;Eur J Prosthodont Restor Dent,2005
5. Current ceramic materials and systems with clinical recommendations: a systematic review;Conrad;J Prosthet Dent,2007