In vivo fractures of endodontically treated posterior teeth restored with enamel-bonded resin.
The cumulative survival rate of 190 endodontically treated posterior teeth were assessed in a retrospective study; all teeth had an MO/DO or an MOD cavity restored with a composite resin without cuspal overlays after previous acid-etching of the enamel. In contrast to our previous study on endontically treated posterior teeth restored with amalgam, the survival rate of the MOD resin-restored teeth was equal to that of MO/DO teeth. Teeth restored with a light-activated resin had a much lower survival rate than teeth restored with a chemically-activated material, the cause presumably being that the light-activated resins were insufficiently irradiated. Nearly 25% of the teeth had been restored with a microfilled resin for anterior use and these teeth had a lower survival rate than had teeth restored with a macrofilled or hybrid resin. It was also found that a beveling technique did not decrease the fracture rate while the use of an intermediate layer of low-viscosity resin resulted in a significant improvement.
Hansen
E K
EK
Institute of Dental Materials and Technology, Royal Dental College, Copenhagen.
Asmussen
E
E
D001641:Bicuspid; D003188:Composite Resins; D001840:Dental Bonding; D003737:Dental Cavity Preparation; D003793:Dental Restoration, Permanent / Q000379:methods*; D006801:Humans; D008963:Molar; D012189:Retrospective Studies; D012390:Root Canal Therapy / Q000009:adverse effects*; D011795:Surveys and Questionnaires; D016019:Survival Analysis; D014082:Tooth Fractures / Q000453:epidemiology* / Q000209:etiology
D003188:Composite Resins