Y. Maeda, T. Satoh, M. Sogo, “In vitro differences of stress concentrations for internal and external hex implant–abutment connections: a short communication,” Journal of Oral Rehabilitation, vol. 33, pp. 75–78, 2006.
 B. R. Merz, S. Hunenbart, U. C. Belser, “Mechanics of the implant–abutment connection: an 8-degree taper compared to a butt joint connection,” International Journal of Oral and Maxillofacial Implants, vol. 15, pp. 519–526, 2000.
 S. Capodiferro, G. Favia, M. Scivetti, G. De Frenza, R. Grassi, “Clinical management and microscopic characterisation of fatique-induced failure of a dental implant,” Case report. Head and Face Medicine, vol. 22, issue. 2, pp. 18, 2006.
 P. Gehrke, G. Dhom, J. Brunner, D. Wolf, M. Degidi, A. Piattelli, “Zirconium implant abutments: fracture strength and influence of cyclic loading on retaining-screw loosening,” Quintessence International, vol. 37, issue. 1, pp. 19-26, 2006.
 A. Khraisat, “Stability of implant-abutment interface with a hexagon-mediated butt joint: failure mode and bending resistance,” Clinical Implant Dentistry and Related Research, vol. 7, issue. 4, pp. 221-228, 2005.
 F. H. G. Butz, M. Okutan, J. R. Strub, “Survival rate, fracture strength and failure mode of ceramic implant abutments after chewing simulation,” Journal of Oral Rehabilitation, vol. 32, issue. 11, pp. 838-843, 2005.
 H. Y. Suzuki, “Finite element stress analysis of ceramics crown on premolar. Relation between ceramics materials and abutment materials,” Nippon Hotetsu Shika Gakkai Zasshi, vol. 33, issue. 2, pp. 283-293, 1989.
 K. A. Proos, J. Ironside, G. P. Steven, “Finite element analysis studies of an all-ceramic crown on a first premolar,” International Journal of Prosthodontics, vol. 15, issue. 4, pp. 404-412, 2002.
 R. C. van Staden, H. Guan, Y. C. Loo, N. W. Johnson, N. Meredith, “Stress Evaluation of Dental Implant Wall Thickness using Numerical Techniques,” Applied Osseointegration Research, (In Press), 2008.
 A. R. Curtis, A. J. Wright, G. J. Fleming, “The influence of simulated masticatory loading regimes on the bi-axial flexure strength and reliability of a Y-TZP dental ceramic,” Journal of Dentistry, vol. 34, issue. 5, pp. 317-325, 2005.
 J. P. Geng, K. B. Tan, G. R. Liu, ”Application of finite element analysis in implant dentistry: a review of the literature,” Journal of Prosthetic Dentistry, vol. 85, issue. 6, pp. 585-598, 2001.