J Adv Prosthodont.  2019 Aug;11(4):232-238. 10.4047/jap.2019.11.4.232.

Wear resistance of indirect composite resins used for provisional restorations supported by implants

Affiliations
  • 1Nihon University School of Dentistry, Tokyo, Japan. tsujimoto.akimasa@nihon-u.ac.jp
  • 2Creighton University School of Dentistry, Omaha, NE, USA.
  • 3A.T. Still University Arizona School of Dentistry & Oral Health, Mesa, AZ, USA.
  • 4Autonomous University of Queretaro School of Dentistry, Queretaro, Mexico.
  • 5University of Minnesota School of Dentistry, Minneapolis, MN, USA.

Abstract

PURPOSE
The aim of this study was to investigate simulated localized and generalized wear of indirect composite resins used for implant supported provisional restorations.
MATERIALS AND METHODS
The study investigated ten indirect composite resins. Two kinds of wear were simulated by 400,000 cycles in a Leinfelder-Suzuki (Alabama) machine. Localized wear was simulated with a stainless-steel ball bearing antagonist and generalized with a flat-ended stainless-steel cylinder antagonist. The tests were carried out in water slurry of polymethyl methacrylate beads. Wear was measured using a Proscan 2100 noncontact profilometer in conjunction with Proscan and AnSur 3D software.
RESULTS
Both localized and generalized wear were significantly different (P<.05) among the indirect composite resins. SR Nexco and Gradia Plus showed significantly less wear than the other indirect composite resins. The rank order of wear was same in both types of wear simulation.
CONCLUSION
Indirect composite resins are recommended when a provisional implant-supported restoration is required to function in place over a long period. Although only some indirect composite resins showed similar wear resistance to CAD/CAM composite resins, the wear resistance of all the indirect composite resins was higher than that of bis-acryl base provisional and polymethyl methacrylate resins.

Keyword

Composite resins; Dental restoration wear; Dental prosthesis; Implant-supported

MeSH Terms

Composite Resins*
Dental Prosthesis
Dental Restoration Wear
Polymethyl Methacrylate
Water
Composite Resins
Polymethyl Methacrylate
Water
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