Biomechanical Analysis of Implant Assisted-Overdentures with Variations in the Attachments Systems  

作　　者：Eduardo Vedovatto Jose Vitor Quinelli Mazaro Humberto Gennari Filho Paulo Sérgio Perri de Carvalho Caroline Cantieri de Mello Cleidiel Aparecido Araujo Lemos 

机构地区：[1]Sã o Leopoldo MandicInstituteandResearch Center, Campinas, Brazil [2]Department of Prosthodontic and Dental Materials, Araç atuba School of Dentistry, Sã o Paulo State University (UNESP), Araç atuba, Brazil [3]Department of Surgery an Integrated Clinic, Araç atuba School of Dentistry, Sã o Paulo State University (UNESP), Araç atuba, Brazil [4]Departmentof Dental Materials and Prosthodontics, Araç atuba SchoolofDentistry, Sã o Paulo StateUniversity (UNESP), Araç atuba, Brazil.

出　　处：《Materials Sciences and Applications》2015年第8期734-742,共9页材料科学与应用期刊（英文）

摘　　要：The aim of this study was to assess the stress patterns on the peri-implant zone and residual alveolar ridge in different overdenture attachment system designs by the photoelasticity method. Four attachments systems were tested: O-ring, ERA, Bar-clip, and Bar-clip/O-ring association. The prostheses were loaded with 100 N in five pre-determined points and the photoelastic model was evaluated by a circular polariscope. The anterior load, O-ring, and ERA showed better stress distribution in relation to the bars systems, which presented stress levels surrounding implants. The molar load, Bar-clip/O-ring association, presented the biggest stress concentration on the peri-implant region in relation to the others. When the second molar was loaded, there was a concentration of stress in the alveolar ridge in all situations analyzed. Within the limitation of this “in vitro” study, it could be concluded that there were biomechanical differences among the attachments systems analyzed, principally between isolated and the bars systems. The O-ring showed better stress distribution and the Bar-clip/O-ring showed higher stress concentration.The aim of this study was to assess the stress patterns on the peri-implant zone and residual alveolar ridge in different overdenture attachment system designs by the photoelasticity method. Four attachments systems were tested: O-ring, ERA, Bar-clip, and Bar-clip/O-ring association. The prostheses were loaded with 100 N in five pre-determined points and the photoelastic model was evaluated by a circular polariscope. The anterior load, O-ring, and ERA showed better stress distribution in relation to the bars systems, which presented stress levels surrounding implants. The molar load, Bar-clip/O-ring association, presented the biggest stress concentration on the peri-implant region in relation to the others. When the second molar was loaded, there was a concentration of stress in the alveolar ridge in all situations analyzed. Within the limitation of this “in vitro” study, it could be concluded that there were biomechanical differences among the attachments systems analyzed, principally between isolated and the bars systems. The O-ring showed better stress distribution and the Bar-clip/O-ring showed higher stress concentration.

关 键 词：DENTAL IMPLANTS Complete DENTURE OVERDENTURES 

分 类 号：R73[医药卫生—肿瘤]