Biomechanical Analysis of Implant Assisted-Overdentures with Variations in the Attachments Systems
Biomechanical Analysis of Implant Assisted-Overdentures with Variations in the Attachments Systems作者机构：Sã o Leopoldo MandicInstituteandResearch Center Campinas Brazil Department of Prosthodontic and Dental Materials Araç atuba School of Dentistry Sã o Paulo State University (UNESP) Araç atuba Brazil Department of Surgery an Integrated Clinic Araç atuba School of Dentistry Sã o Paulo State University (UNESP) Araç atuba Brazil Departmentof Dental Materials and Prosthodontics Araç atuba SchoolofDentistry Sã o Paulo StateUniversity (UNESP) Araç atuba Brazil.
出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)
年 卷 期：2015年第6卷第8期
页 面：734-742页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Dental Implants Complete Denture Overdentures
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.
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