1. The “UCLA” abutment;Lewis;Int J Oral Maxillofac Implant,1998
2. A custom titanium abutment for the anterior single-tooth implant;Marchack;J Prosthet Dent,1996
3. CAD/CAM dental systems in implant dentistry: update;Fuster-Torres;Med Oral Patol Oral Cir Bucal,2009
4. Ideal gingival form with computer-generated permanent healing abutments;Kerstein;Compend Contin Educ Dent,2000
5. Clinical and laboratory manual of dental implant abutments;Shafie,2014