title: [Stress analysis of the staggered and straight placement of implants in the mandibular posterior region under the localized load].
abstract: OBJECTIVE
  To compare the stress distribution of the staggered and straight placement of implants in the mandibular posterior region.
  
  
  METHODS
  Using three-dimensional finite element approach to analyze the stress distribution and variance regularity under the localized load.
  
  
  RESULTS
  Under vertical load, the stress peak value reduced when wide implant was placed straight (min: 3.70 MPa), but slightly increased when normal implant was placed staggered (max: 8.32 MPa); under the inclined load from buccal to lingual direction, the stress peak value reduced when the wide implant was placed in straight line (min: 12.29 MPa) or normal implant was placed staggered with buccal offset configuration (min: 15.48 MPa), but increased with lingual offset configuration (max: 23.60 MPa).
  
  
  CONCLUSIONS
  Wide implant (> or = 4 mm) with straight placement should be adopted to reduce the stress peak value and improve stress distribution, when the buccolingual diameter of the alveolar ridge in the mandibular posterior region was wide.
authors: Department of Implant Center, Jilin University School of Stomatology, Changchun 130041, China. liyingxiaowan@163.com
authors: Ying
authors: Y
authors: Li
authors: Yan-min
authors: YM
authors: Zhou
authors: Zhen-ping
authors: ZP
authors: Zhou
authors: Xin
authors: X
authors: Wang
mesh_terms: D000328:Adult; D003758:Dental Implantation, Endosseous / Q000379:methods*; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D006801:Humans; D008334:Mandible