Improved wear resistance of indirect composite-titanium joint on application of a metal priming system

Karin Komiyama, DDS,(a) Mahoko Murakami, DDS,(a) Motoko Nakazawa, DDS,(a) Tomohisa Ogino, DDS,(a) Momoko Shimada, DDS, PhD,b Hideo Matsumura, DDS, PhD,c Hiroyasu Koizumi, DDS, PhD,c and Naomi Tanoue, DDS, PhDd

(a)Nihon University Graduate School of Dentistry, (b)Private Practice, Green Dental Clinic, (c)Department of Fixed Prosthodontics, and Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo, and (d)Nagasaki University Hospital of Medicine and Dentistry, Nagasaki, Japan

Purpose: The aim of this study was to evaluate the effect of a metal priming system on the wear resistance of composite-titanium interface.
Materials and Methods: Two different types of plate specimens were prepared: composite-titanium (Estenia C&B and T-Alloy H) joint without primer, and composite-titanium joint bonded with a priming system (Alloy Primer and Estenia Opaque Primer). Toothbrush wear test was performed using the plate specimens, toothbrushes (Bee King), and a dentifrice (Crest).
Results: Bonded specimens with priming exhibited less wear depth (3.5 mm) than the specimens joined without priming (8.0 μm).
Conclusion: It can be concluded that the use of a metal priming system at the composite-titanium interface effectively enhanced the wear resistance of the joined area under repeated brushing.(Int Chin J Dent 2008; 8: 17-20.)
Key Words: composite, primer, titanium, toothbrush, wear.