title: [Effect of the abutments with reduced periodontal support on stress distribution of support tissue]
abstract: OBJECTIVE:This study applied finite element analysis (FEA) compared stress distribution characteristics of mandible,bilateral,SJ-1 bolt(extracoronal) distal extension attachment prostheses when the abutments were subject to eight different loss of periodontal support.METHODS:Finite element analysis.RESULTS:It was shown that periodontal support loss results in increased stress of the terminal abutment tooth without sudden changes.CONCLUSION:Compared favorable stress distribution result from splinted compromised abutment,and the first premolar periodontal support loss less than that of the second premolar and this loss below 30%.
authors.affiliation: Department of Prosthodontics,School of Stomatology, Shanghai Second Medical University. Shanghai 200011,China.
authors.forename: Y L
authors.initials: YL
authors.lastname: Zheng
authors.forename: L
authors.initials: L
authors.lastname: Chen
authors.forename: F Q
authors.initials: FQ
authors.lastname: Zhang
authors.forename: C T
authors.initials: CT
authors.lastname: Wang