[1] Univ Rey Juan Carlos, Univ Clin, Fac Hlth Sci, Oral Surg & Implantol Dept, Av Atenas S-N, Madrid 28922, Spain
[2] Univ Connecticut, Sch Dent Med, Oral & Maxillofacial Surg Div, Storrs, CT 06269 USA
[3] Univ Connecticut, Sch Dent Med, Prosthodont Div, Storrs, CT 06269 USA
[4] Univ Rey Juan Carlos, Madrid, Spain
[5] Hosp Univ La Paz, Oral & Maxillofacial Surg Dept, Madrid, Spain
[6] Univ Autonoma Madrid, Dept Pathol, Madrid, Spain
[7] Hosp Univ La Paz, Dept Pathol, Madrid, Spain