title: Influence of Different Abutment Designs on the Biomechanical Behavior of Dental Root-Analog Implant: A Three-Dimensional Finite Element Analysis.
abstract: OBJECTIVE
  The aim of this study was to evaluate cross-sectional area of the abutments, strain distribution in the periimplant bone, stress in the abutments and dental root-analog implant by different abutment design under different loading conditions, through three-dimensional finite element analysis.
  
  
  METHODS
  Two three-dimensional finite element models were established. Two types of abutments, oval cross section abutment (OCSA) and circular cross section abutment (CCSA) were designed, keeping the size of the thinnest implant wall 0.75 mm. Two types of load were applied to the abutment in each model: 100 N vertical load (V), 100 N vertical/50 N horizontal load (VH). The biomechanical behaviors of abutments, implants, and periimplant bone were recorded.
  
  
  RESULTS
  The cross-section area of OCSA is 36.5% larger than that of CCSA. In implants, the maximum von Mises stress value in OCSA design was 24.6% lower than that in CCSA design under V and under VH. In abutments, the maximum von Mises stress value in OCSA design was 40.0% lower than that in CCSA design under V, the maximum von Mises stress value in OCSA design was 12.2% lower than that in CCSA design under VH.
  
  
  CONCLUSIONS
  The irregular design offers advantages over regular design.
authors.affiliation: *Assistant Researcher, Department of The Second Dental Center, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, People's Republic of China. †Attending doctor, Department of The Second Dental Center, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, People's Republic of China. ‡Postgraduate, Department of School of mathematics and physical, University of Science & Technology Beijing, Beijing, People's Republic of China. §Assistant Professor, Department of School of mathematics and physical, University of Science & Technology Beijing, Beijing, People's Republic of China. ¶Attending doctor, Department of The Second Dental Center, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China. ‖Professor, Chief of Department of The Second Dental Center,Department of The Second Dental Center, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, People's Republic of China.
authors.forename: Ling
authors.initials: L
authors.lastname: He
authors.forename: Deli
authors.initials: D
authors.lastname: Li
authors.forename: Jiwu
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiucheng
authors.initials: X
authors.lastname: Li
authors.forename: Songhe
authors.initials: S
authors.lastname: Lu
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Tang
mesh_terms: D001696:Biomechanical Phenomena; D000044:Dental Abutments; D059605:Dental Implant-Abutment Design; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D006801:Humans; D013314:Stress, Mechanical; D014092:Tooth Root / Q000601:surgery*; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants