title: [The influence of different root length on stress distribution in the bone around abutment root of telescopic overdenture].
abstract: OBJECTIVE
  To investigate the influence of bone height around the roots on stress distribution in a mandible with two canines remained and covered with an telescopic overdenture.
  
  
  METHODS
  Three-dimensional finite element method.
  
  
  RESULTS
  As the height of the bone around the roots decreased, the stress increased. But the maximum stress in the bone in this study is lower than that in the bone around the canine under normal condition.
  
  
  CONCLUSIONS
  In the mandible, when the alveolar bone resorption reaches the apical 1/3 of canine (root length 4, 5 mm), if part of the tooth crown was removed, to make an acceptable crown/root ratio, so the canine can be used as the abutment of an overdenture.
authors.affiliation: Department of Prosthetics, School of Stomatology, Beijing Medical University, Beijing 100081, China.
authors.forename: S
authors.initials: S
authors.lastname: Pan
authors.forename: H
authors.initials: H
authors.lastname: Feng
authors.forename: Y
authors.initials: Y
authors.lastname: Yin
mesh_terms: D019245:Compressive Strength; D000044:Dental Abutments; D003799:Dental Stress Analysis; D003828:Denture, Overlay; D020342:Finite Element Analysis; D006801:Humans; D014092:Tooth Root / Q000033:anatomy & histology*