支台築造用コンポジットレジンに関する研究　第８報　既製ポストの保持力について

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  • Composite Resin for Dowel-cores. Part VIII. Retention of Prefabricated Post.
  • Part VIII Retention of Prefabricated Post
  • 第8報既製ポストの保持力について

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In continuation of our studies concerning composite resins for dowel-cores, a new dentin primer was examined to improve the retentive force of prefabricated posts to the dentin.<BR>In this study, four series of treatment procedure to be performed on the root canal dentin before cementation and no treatment as the control were examined. After dentin treatment, prefabricated posts were cemented with dual-cured composite core resin and adhesive resin cement. Then their early retentivities were measured and compared with one another.<BR>The following results were obtained;<BR>1. A new dentin primer, Teeth Primer, was very effectivity for improving the retentivity of prefabricated posts in the root canal.<BR>2. When using dual-cured composite core resin as a luting agent, the combination of Teeth Primer and Clearfil Photo Bond was the most recommendable for clinical use, because of its short treating time as well as the very high retentive force. It means that the fixation of prefabricated posts in the root canal and the fabrication of composite resin cores can be performed at the same time.<BR>3. When using paste-type Panavia as a luting agent, acid etching was really effective for retention of the posts. However, the single use of Teeth Primer was estimated to be more desirable clinically because of its shorter treating time.

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