A preliminary comparative study of the retentive properties of four post and core systems in etched preparations
Gelfand, M.
Journal 58(8): 665
1992
ISSN/ISBN: 0709-8936 PMID: 1504906 Document Number: 397517
Post and core systems anchored and supported by endodontic files, Para Posts, Boston Posts and Flexi Posts were subjected to tensile testing in an Instron testing machine. All forces were applied to the cores until the post-core system was removed. The test results revealed no statistically significant difference among post and core systems built up with Para Posts, Boston Posts or Flexi Posts. The endodontic files proved to be significantly less retentive than the other post systems evaluated. Under the conditions of this study, the use of endodontic files as retentive posts is not supported.