OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - Int J Oral Maxillofac Implants JT - The International Journal of Oral & Maxillofacial Implants IS - 1942-4434 (Electronic) IS - 0882-2786 (Print) IP - 1 VI - 37 PST - ppublish DP - 2022 PG - 153-158 LA - en TI - Strain Behavior of Implant-Supported Full-Arch Fixed Dental Prostheses Supported by Four or Five Implants LID - 10.11607/jomi.9087 [doi] FAU - Sbardelotto, Cristian AU - Sbardelotto C FAU - Lapria Faria, Adriana Cláudia AU - Lapria Faria A FAU - Tiossi, Rodrigo AU - Tiossi R FAU - Ribeiro, Ricardo Faria AU - Ribeiro R FAU - Silveira Rodrigues, Renata Cristina AU - Silveira Rodrigues R CN - OT - dental implants OT - digital image correlation method OT - full-arch fixed dental prostheses OT - stress analysis AB - Purpose: Strains transferred to the supporting simulated bone structure by implant-supported full-arch fixed dental prostheses (FAFDPs) were analyzed by digital image correlation (DIC). Materials and methods: Polyurethane models were made using 3.75 × 11-mm implants and divided into the following groups with different implant numbers and design: EH5 (five implants/external hexagon), MT5 (five implants/internal taper), EH4 (four implants/external hexagon), and MT4 (four implants/internal taper). Both qualitative and quantitative (one-way analysis of variance [ANOVA] statistical comparison) analyses were performed by the DIC method after the application of a 250-N load in the central fossa of the mandibular first molar. Different regions of interest were selected in the polyurethane model for comparison between groups. Results: Compressive strains were found in the cervical region of the models, and tensile strains were found in the apical region of the models. Significant differences were found in the different analyzed regions of interest for the different number of supporting implants and implant designs (P < .05). Conclusion: Groups with five implants showed more regions with less strain concentration compared to groups with four implants, but strain distribution was similar between groups. The different tested implant designs showed similar strain concentration and distribution to the supporting structures. AID - 2822039