132 research outputs found
Effect of light curing modes and ethanol immersion media on the susceptibility of a microhybrid composite resin to staining
Effects of curing protocol and storage time on the micro-hardness of resin cements used to lute fiber-reinforced resin posts
Hydrolytic degradation of a resin composite as a function of the curing tip distance and aging
A survey of failed post-retained restorations
Survival of endodontically treated, post-restored teeth depends on a multitude of factors, all of which are practically impossible to include in a randomized, controlled clinical study. The purpose of this survey was to characterize and analyze reported failures of post-retained restorations to identify factors critical to failure and to type of failure. A questionnaire was mailed to private practitioners in Denmark with a request to complete the questionnaire whenever a patient presented with a failed post-retained restoration. Information was gathered on factors related to the patient, the tooth, the restorative materials, and the techniques. Two-hundred and sixty questionnaires were collected from 171 practitioners over a 3-year period. Functioning time until failure varied between 3Â months and 38Â years. Mean survival time until failure was 11Â years. Of the failed restorations, 61% had functioned for 10Â years or less. Fracture of the tooth was the most common type of failure reported, followed by loosening of the post and fracture of the post. Tapered posts implied an increased risk of tooth fracture compared to loosening or fracture of the post, and the relative risk of tooth fracture increased with the functioning time until failure. Fracture of the post was more common among male than female patients. On the basis of this survey of failed post-retained restorations, it was concluded that tapered posts were associated with a higher risk of tooth fracture than were parallel-sided posts
Evaluation of linear polymerization shrinkage, flexural strength and modulus of elasticity of dental composites
Long-term fluoride release from a glass ionomer cement, a compomer, and from experimental resin composites
Influence of eugenol - containing temporary cement on efficacy of dentin-bonding systems
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