title: [Study of self-threading pins in the preservative restoration of teeth with large area defects].
abstract: OBJECTIVE
  To investigate the application of self-threading pins in the preservative of teeth with large area defects.
  
  
  METHODS
  A follow-up study of 42 out of 50 patients with large area defects in vital teeth were restored by self-threading pins.
  
  
  RESULTS
  Among the cases that had been followed up for 5 years, except 2 upper molars which were extracted because of fraction, other cases achieved good effects.
  
  
  CONCLUSIONS
  Self-threading pins are very suitable to restore large area defects of teeth with healthy pulp, and can be widely used because of significant clinical effects.
authors.affiliation: Oral Faculty, Xiangya Hospital, Central South University, Changsha 410008, China.
authors.forename: C F
authors.initials: CF
authors.lastname: Luo
authors.forename: C Y
authors.initials: CY
authors.lastname: Fang
authors.forename: G Y
authors.initials: GY
authors.lastname: Que
mesh_terms: D000328:Adult; D001858:Bone Nails; D003731:Dental Caries / Q000628:therapy*; D003793:Dental Restoration, Permanent / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D018677:Tooth Injuries / Q000628:therapy*