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Volume 19 , Issue 2
March/April 2006

Pages 183–184


Comparison of the Retention of 5 Core Materials Supported by a Dental Post

Steven Gu, PhD / Mario Isidro, BS / Allan S. Deutsch, DMD / Barry L. Musikant, DMD


PMID: 16602368

Purpose: This study evaluated the retention of dental post heads (No. 2 Flexi-Post) embedded in 5 core materials (1 automix resin composite, 2 hand-mixed resin composites, and 2 glass ionomers). Materials and Methods: Samples were prepared by embedding post heads in 4.5-mm-thick disks of core material. Results: The resin composite materials provided significantly more retention than the glass-ionomer–based materials. The post head retention of the automix resin composite was comparable to that of the hand-mixed resin composites. Conclusion: Unlike the resin composite samples, all the glass-ionomer samples fractured during testing. This is an unacceptable condition for a clinically successful restoration. Int J Prosthodont 2006;19:183–184.


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