1. The “UCLA” abutment;Lewis;Int J Oral Maxillofac Implants,1988
2. Is it a tooth or an implant?;Preston;J Calif Dent Assoc,1992
3. Augmentation of the deformed residual edentulous ridge for fixed prosthesis;Abrams;Compend Contin Educ,1980
4. The edentulous ridge in fixed prosthodontics;Garber;Compend Contin Educ,1981
5. A systematic approach to the control of esthetic form;Preston;J Prosthet Dent,1976