Brief Clinical StudiesStress Analysis of Axial and Tilted Implants in Full-arch Fixed Dentures Under Different Abutment ConditionsMazaro, José Vitor Quinelli MSc, PhD; da Silva, Cristina Ramos MSc, PhD; Filho, Humberto Gennari MSc, PhD; Zavanelli, Adriana Cristina MSc, PhD; de Mello, Caroline Cantieri MSc; Lemos, Cleidiel Aparecido Araujo DDS, MSc; Pellizzer, Eduardo Piza MSc, PhDAuthor Information Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP – Univ Estadual Paulista, São Paulo, Brazil. Address correspondence and reprint requests to José Vitor Quinelli Mazaro, Araçatuba Dental School, UNESP – Univ Estadual Paulista, José Bonifácio St, 1193, Araçatuba, São Paulo 16015-050, Brazil; E-mail: email@example.com Received 4 September, 2015 Accepted 12 December, 2015 The authors report no conflicts of interest. Journal of Craniofacial Surgery: May 2016 - Volume 27 - Issue 3 - p e249-e252 doi: 10.1097/SCS.0000000000002455 Buy Metrics Abstract The aim of this study was to evaluate the stress distribution on full-arch prostheses, considering axial implants and tilted implants with or without abutments. Two photoelastic models were made, being that in 1 model the implants were inserted perpendicular, whereas in the other model 2 implants were inserted perpendicular and 2 implants were inserted with tilting 30° to the distal area. The prosthetic situations were evaluated: A—axial implants and nonsegmented full-arch prosthesis; B—axial implants and segmented full-arch prosthesis; C—tilted distal implants and nonsegmented full-arch prosthesis; D—tilted distal implants and segmented full-arch prosthesis, and was applied an axial load of 100 N at 5 points. The results showed greater stress concentration for axial implants than tilted implants in anterior and posterior loading. There was no difference in stress distribution to the use of abutment in the tilted implants. Shorter cantilever with tilted implants improved the stress distribution; the use of abutment did not influence the stress distribution. © 2016 by Mutaz B. Habal, MD.