title: Influence of different mucosal resiliency and denture reline on stress distribution in peri-implant bone tissue during osseointegration. A three-dimensional finite element analysis.
abstract: OBJECTIVE
  The aim of this study was to evaluate the influence of mucosal properties and relining material on the stress distribution in peri-implant bone tissue during masticatory function with a conventional complete denture during the healing period through finite element analysis.
  
  
  METHODS
  Three-dimensional models of a severely resorbed mandible with two recently placed implants in the anterior region were created and divided into the following situations: (i) conventional complete denture and (ii) relined denture with soft lining material. The mucosal tissue properties were divided into soft, resilient and hard. The models were exported to mechanical simulation software; two simulations were carried out with a load at the lower right canine (35 N) and the lower right first molar (50 N). Data were qualitatively evaluated using Maximum Principal Stress, in MPa, given by the software.
  
  
  RESULTS
  All models showed stress concentrations in the cortical bone corresponding to the cervical part of the implant. The mucosal properties influenced the stress in peri-implant bone tissue showing a different performance according to the denture base material. The simulations with relined dentures showed lower values of stress concentration than conventional ones.
  
  
  CONCLUSIONS
  It seems that the mucosal properties and denture reline have a high influence on the stress distribution in the peri-implant bone during the healing period.
authors: Piracicaba Dental School, University of Campinas-UNICAMP, Piracicaba, SP, Brazil.
authors: Ataís
authors: A
authors: Bacchi
authors: Rafael L X
authors: RL
authors: Consani
authors: Marcelo F
authors: MF
authors: Mesquita
authors: Mateus B F
authors: MB
authors: dos Santos
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D016301:Alveolar Bone Loss / Q000503:physiopathology; D000539:Alveolar Process / Q000503:physiopathology*; D001696:Biomechanical Phenomena; D001732:Bite Force; D003198:Computer Simulation; D003481:Cuspid; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported; D003819:Denture Bases; D003822:Denture Liners; D003823:Denture Rebasing; D003824:Denture, Complete; D055119:Elastic Modulus; D020342:Finite Element Analysis; D006244:Hardness; D006801:Humans; D021621:Imaging, Three-Dimensional; D008409:Mastication / Q000502:physiology; D008954:Models, Biological; D008963:Molar; D009061:Mouth Mucosa / Q000502:physiology*; D016348:Osseointegration / Q000502:physiology*; D010795:Phthalic Acids / Q000737:chemistry; D013314:Stress, Mechanical; D014093:Tooth, Artificial
chemical_list: D000180:Acrylic Resins; D015921:Dental Implants; D003764:Dental Materials; D010795:Phthalic Acids; C043685:Coe Comfort