title: Stress Distribution in Bone and Implants in Mandibular 6-Implant-Supported Cantilevered Fixed Prosthesis: A 3D Finite Element Study.
abstract: OBJECTIVE
  The purpose of the study was to evaluate by a 3-dimensional finite element analysis the load transmission to periimplant bone by a framework supported by 6 implants placed in an edentulous mandible and to compare the stress distribution for varying cantilever lengths.
  
  
  METHODS
  A computerized model of the anterior segment of a mandible with a 6-implant-supported bridge was created in software. The length of the cantilever segment was considered as 10, 15, and 20 mm. A 150 N load was applied to the terminal point of the cantilever segment, and Von Mises stresses were analyzed along implants, framework, and bone.
  
  
  RESULTS
  When the cantilever length was increased from 10 to 20 mm, the stress increased 79.66% in the framework, 68.16% in implants, and 59.96% and 52.81% in cortical and cancellous bones, respectively.
  
  
  CONCLUSIONS
  The greatest amount of stress was seen around the distal-most region of the distal-most implant. The framework absorbed the maximum amount of stresses followed by the implants, cortical bone, and cancellous bone. Extension of the cantilever beyond 15 mm could lead to greater stress in the lingual cortical plate, which could compromise the integrity of the implants.
authors.affiliation: *Postgraduate Student, Department of Prosthodontics, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Belgaum, India. †Professor, Department of Prosthodontics, Maratha Mandal's NGH Institute of Dental Sciences and Research Centre, Belgaum, India. ‡Senior Lecturer, Department of Prosthodontics, Aditya Dental College, Beed, India.
authors.forename: Omkar Vinayak
authors.initials: OV
authors.lastname: Padhye
authors.forename: Manisha
authors.initials: M
authors.lastname: Herekar
authors.forename: Viraj
authors.initials: V
authors.lastname: Patil
authors.forename: Shahnawaz
authors.initials: S
authors.lastname: Mulani
authors.forename: Megha
authors.initials: M
authors.lastname: Sethi
authors.forename: Aquaviva
authors.initials: A
authors.lastname: Fernandes
mesh_terms: D003198:Computer Simulation; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D006801:Humans; D008334:Mandible; D013314:Stress, Mechanical; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants