The effect of a translucent post on resin composite depth of cure

Howard W. Roberts, Daniel L. Leonard, Kraig S. Vandewalle, Mark E. Cohen, David G. Charlton

Research output: Contribution to journalArticlepeer-review

112 Scopus citations


Objective. To evaluate the effect of a light-transmitting post on the depth of cure of a resin composite. Methods. Acetate resin molds were filled with resin composite in which a light-transmitting post was inserted into the center and photopolymerized to the manufacturer's recommendations. Identical molds without a light-transmitting post were photopolymerized in a similar matter and served as a control. Molds were sectioned on a water-cooled, diamond saw at prescribed distances and the depth of cure was determined using a Knoop Hardness bottom-to-top ratio criterion. Data within each group were analyzed using 2-way (depth-by-distance) repeated measure ANOVA. Between-group contrasts (post versus no post) were accessed by a 3-way (2 within-subjects and 1 between-subjects) ANOVA with critical p = 0.05. Results. The presence of the post did increase (p<0.001) Knoop Hardness values in simulated apical regions as compared to a control. However, there was no difference in the depth of cure between the groups (3-way analysis p = 0.2) and also when evaluated using an 80% bottom-to-top Knoop Hardness ratio. Significance. The results suggest that these posts may have a limited utility when judged against a Knoop Hardness ratio criterion.

Original languageEnglish
Pages (from-to)617-622
Number of pages6
JournalDental Materials
Issue number7
StatePublished - Sep 2004


  • Depth of cure
  • Light transmittal
  • Resin composite
  • Translucent posts

ASJC Scopus subject areas

  • Materials Science (all)
  • Dentistry (all)
  • Mechanics of Materials


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