Bondability of Resilon to a Methacrylate-Based Root Canal Sealer

Tay, Franklin R.; Hiraishi, Noriko; Pashley, David H.; Loushine, Robert J.; Weller, R. Norman; Gillespie, W. Trent; Doyle, Michael D.

doi:10.1016/j.joen.2005.10.026

« Previous Next »Journal of Endodontics
Volume 32, Issue 2 , Pages 133-137, February 2006

Bondability of Resilon to a Methacrylate-Based Root Canal Sealer

Franklin R. Tay, BDSc (Hons), PhD
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
Noriko Hiraishi, DDS, PhD
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- Address requests for reprints to Dr. Noriko Hiraishi, Prince Philip Dental Hospital, The University of Hong Kong, Pokfulam, 34 Hospital Road, Hong Kong SAR, China.
David H. Pashley, DMD, PhD
- Department of Oral Biology and Maxillofacial Pathology, School of Dentistry, Medical College of Georgia, Augusta, Georgia
Robert J. Loushine, DDS
- Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, Georgia.
R. Norman Weller, DMD, MS
- Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, Georgia.
W. Trent Gillespie, DMD, MPH
- Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, Georgia.
Michael D. Doyle, DDS
- Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, Georgia.

Abstract

Resilon broadens the dimensions of endodontic adhesion by introducing the possibility of creating monoblocs between root canal filling materials and intraradicular dentin by using methacrylate-based sealers. The adhesive strength of Resilon to RealSeal, a methacrylate-based root canal sealer, was evaluated using a modified microshear bond testing design. Flat Resilon surfaces with different roughness were created for bonding to the sealer and compared to a composite control. The composite control exhibited mean shear strength 7.3 to 26.9 times higher than those of the Resilon groups. Shear strength differences among the Resilon groups of different surface roughness highlighted the contribution of micromechanical versus chemical coupling in sealer retention. Ultrastructural evidence of phase separation of polymeric components in Resilon suggested that the amount of dimethacrylate incorporated into this filled, thermoplastic composite may not yet be optimized for effective chemical coupling to methacrylate-based sealers.

Key Words: FE-SEM , methacrylate sealer , polycaprolactone , Resilon , shear bond strength