title: Evaluation of root reinforcement of endodontically treated teeth.
abstract: OBJECTIVE
  The purpose of this study was to test the root reinforcing capabilities of a glass ionomer sealer and to test whether pretreatment of the instrumented canal to alter or remove the smear layer might enhance the reinforcement.
  
  
  METHODS
  Ninety single-canaled roots of standardized dimensions were instrumented to International Standards Organization size 45 and were analyzed for resistance to vertical fracture. Six groups were tested (n = 15).
  
  
  RESULTS
  No significant difference in fracture resistance was observed between any of the groups.
  
  
  CONCLUSIONS
  Under the conditions of this study, reinforcement of endodontically treated mature teeth by placement of adhesive materials in the root was not demonstrated.
authors.affiliation: Department of Restorative Dentistry, Southern Illinois University School of Dental Medicine, 62002, USA.
authors.forename: M E
authors.initials: ME
authors.lastname: Johnson
authors.forename: G P
authors.initials: GP
authors.lastname: Stewart
authors.forename: C J
authors.initials: CJ
authors.lastname: Nielsen
authors.forename: J F
authors.initials: JF
authors.lastname: Hatton
mesh_terms: D000704:Analysis of Variance; D019245:Compressive Strength; D003481:Cuspid; D003738:Dental Cements; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; D006801:Humans; D007180:Incisor; D008334:Mandible; D019279:Resin Cements; D012387:Root Canal Filling Materials; D012390:Root Canal Therapy / Q000009:adverse effects*; D014082:Tooth Fractures / Q000209:etiology / Q000517:prevention & control*; D014092:Tooth Root / Q000293:injuries*; D019553:Tooth, Nonvital / Q000150:complications*; D015035:Zinc Oxide-Eugenol Cement
chemical_list: D003738:Dental Cements; D017220:Dentin-Bonding Agents; D005899:Glass Ionomer Cements; C074934:Ketac Endo; D019279:Resin Cements; D012387:Root Canal Filling Materials; C084018:Scotchbond Multi-Purpose; D015035:Zinc Oxide-Eugenol Cement; C074935:Roth's 801 Sealer