The results of this study did not show significant differences for root fracture incidence between metal- and fiber posts .
INTRODUCTION Teeth requiring endodontic treatment commonly have compromised a coronal tooth structure that often requires the use of an intraradicular post to retain the coronal restoration .
Although usually successful , catastrophic failures requiring extraction have been reported in the literature .
The aim of this systematic review was to analyze clinical trials and cohort studies that evaluated the incidence rate of root fractures in post-retained restorations .
The hypothesis was that the incidence rate related to the use of metal posts was higher than that of fiber posts .
Four post-and-core combinations as abutments for fixed single crowns: a prospective up to 10-year study.
PURPOSE In the present prospect i ve study , four different post- and -core systems were evaluated over a period of up to 10 years . MATERIAL S AND METHODS Fifty endodontically treated teeth in 31 patients were r and omized to one of four groups for post- and -core placement : Group 1 received conventional tapered cast posts and cores ( n = 14 ) ; group 2 received ParaPost system prefabricated gold posts with cast cores ( n = 13 ) ; group 3 received ParaPost system cast posts and cores ( n = 13 ) ; and group 4 received Radix-Anchor posts ( n = 10 ) . Clinical and radiologic evaluations were made . RESULTS One post and core in group 2 was functioning well 58 months after placement when the patient died . No posts and cores in groups 1 or 2 had been lost or had any complications , one in group 3 had been lost because of a root fracture after 108 months , and two in group 4 had been lost after 54 and 88 months , respectively , because of loss of retention . The final treatment result for 46 of the 49 remaining posts ( 30 patients ) was successful . The overall failure rate was 6 % . There were no statistically significant differences between the four groups . CONCLUSION If recommended procedures are strictly followed , posts and cores can serve as abutments for fixed single crowns with satisfactory long-term results
The results of this study did not show significant differences for root fracture incidence between metal- and fiber posts .
INTRODUCTION Teeth requiring endodontic treatment commonly have compromised a coronal tooth structure that often requires the use of an intraradicular post to retain the coronal restoration .
Although usually successful , catastrophic failures requiring extraction have been reported in the literature .
The aim of this systematic review was to analyze clinical trials and cohort studies that evaluated the incidence rate of root fractures in post-retained restorations .
The hypothesis was that the incidence rate related to the use of metal posts was higher than that of fiber posts .