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Effect of metal collars on resistance of endodontically treated teeth to root fracture
R A Barkhordar1, R Radke, J Abbasi
1University of California, School of Dentistry, San Francisco.
Abstract:
Fractures of restored pulpless teeth without reinforcement are a familiar dilemma to the dentist. This study examined the effect of a metal collar with approximate 3 degrees of taper on the resistance of endodontically treated roots to fracture. Teeth without copings failed at a load of 49.6 kg whereas teeth with metal collars failed at a load of 65.29 kg. Our findings indicated that reinforcement with a metal collar is necessary to enhance resistance to root fracture.
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