Mitsuo Nakamura, DDS, PhD,a,b Hiroyasu Koizumi, DDS, PhD,b,c and Hideo Matsumura, DDS, PhDb,c
aPrivate Practice, Ichikawa, bDepartment of Fixed Prosthodontics, and cDivision of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan
This article describes the clinical course of a repaired resin-bonded fixed partial denture (RB-FPD). A posterior FPD cast from silver-palladium-copper-gold alloy (Castwell M.C. 12) was applied to a 27-year-old male patient. A three unit FPD with wrap-around retainers was fabricated. After try-in, the framework surface to be bonded was air-abraded with alumina. The FPD was then treated with a single liquid priming agent (V-Primer), and bonded with a tri-n-butylborane (TBB) initiated adhesive resin (Super Bond Opaque). Sixteen years after seating, fracture of the molar abutment occurred at the bucco-distal cusp and distal marginal ridge around and under the retainer. The fractured area was reduced with a diamond rotary cutting instrument and an inlay cavity was prepared. The cavity preparation was restored with the same system as the RB-FPD. After an observation period of 23 years and six months, the original FPD was functioning satisfactorily. The materials and bonding technique reported here are applicable as an option for a minimally invasive fixed prosthodontic treatment.
(Asian Pac J Dent 2012; 12: 45-48.)
Key Words: adhesive, alloy, primer, resin-bonded fixed partial denture, repair