TIPS FROM OUR R E A D E R S
An interim buccal flange o b t u r a t o r L. Kirk Gardner, D.D.S.,* Gregory R. Parr, D.D.S.,** and David W. Richardson, D.D.S.*** Medical College of Georgia, School of Dentistry, Augusta, Ga. Interim obturator prostheses may be made in several ways. However, with the advent of light-cured acrylic resins, 1 an interim prosthesis may be made in the time it would normally take to wax a pattern for a heat-cured acrylic resin prosthesis. A technique that has been successful for the authors is presented. 1. Prepare the master cast by securing the rests and retentive arms in position with plaster or sticky wax. Paint the cast with the releasing agent Triad (Dentsply, York, Pa.). 2. Warm a packet of Triad resin to decrease its viscosity. With sculpting instruments shape the composite resin to the normal denture-bearing areas and into the periphery of the defect. The base of the defect is not covered, thus forming the first phase of the buccal flange obturator (Fig. 1).2 3. Paint the surface of the resin with the sealing agent. The sealer prevents the effect of oxygen on the outer surface, which inhibits complete polymerization at the surface of the resin. Place the cast in the Triad curing machine for 10 minutes. 4. Place oil-base modeling clay into the defect and build it
*Associate Professor, Department of Prosthodontics. **Professor, Department of Prosthodontics. ***Assistant Professor, Department of Prosthodontics. 10/4/26177
to the shape of an edentulous ridge. Smooth the clay and paint it with the releasing agent. Place a 2mm thickness of Triad resin over the clay and adapt it to the cured composite resin. Smooth the Triad resin with sculpting instruments and cure for 10 minutes. 5. Once cured, cool the prosthesis in air and separate it from the cast. Finish the light-cured acrylic resin as for any conventional acrylic resin. Remove the modeling clay from the open top part of the flange, and smooth the inner and outer surfaces of any roughness. Paint the internal surface of the buccal flange with mono-poly viscous resin 3 and polish the outer surfaces (Fig. 2). The resulting interim prosthesis is light in weight, strong, and dimensionally stable. In addition, fabrication time permits the patient to receive the interim prosthesis in 1 day. REFERENCES 1. Caputo TL, Ryan JD. An easy, fast technique for making immediate surgical obturators. J PROSTHET DENT 1989;61:473-5. 2. Oral K. Construction of a buccal flange obturator. J PROSTHET DENT 1979;41:193~7. 3, Gardner LK, Parr GR. Extending the longevity of temporary soft liners with a mono-poly coating. J PROSTHET DENT 1988;59:71-2. Reprint requests to: DE. L. KIRK GARDNER SCHOOL OF DENTISTRY MEDICAL COLLEGE OF GEORGIA AUGUSTA, GA 30912-1250
Fig. 2. Finished buccal flange prosthesis. Fig. 1. Triad material placed on cast and smoothed for light cure. Note that rest and retentive arms are in position so that cast is visible at base of defect.
862
JUNE 1991
VOLUME 65 NUMBER 6
An interim buccal flange o b t u r a t o r L. Kirk Gardner, D.D.S.,* Gregory R. Parr, D.D.S.,** and David W. Richardson, D.D.S.*** Medical College of Georgia, School of Dentistry, Augusta, Ga. Interim obturator prostheses may be made in several ways. However, with the advent of light-cured acrylic resins, 1 an interim prosthesis may be made in the time it would normally take to wax a pattern for a heat-cured acrylic resin prosthesis. A technique that has been successful for the authors is presented. 1. Prepare the master cast by securing the rests and retentive arms in position with plaster or sticky wax. Paint the cast with the releasing agent Triad (Dentsply, York, Pa.). 2. Warm a packet of Triad resin to decrease its viscosity. With sculpting instruments shape the composite resin to the normal denture-bearing areas and into the periphery of the defect. The base of the defect is not covered, thus forming the first phase of the buccal flange obturator (Fig. 1).2 3. Paint the surface of the resin with the sealing agent. The sealer prevents the effect of oxygen on the outer surface, which inhibits complete polymerization at the surface of the resin. Place the cast in the Triad curing machine for 10 minutes. 4. Place oil-base modeling clay into the defect and build it
*Associate Professor, Department of Prosthodontics. **Professor, Department of Prosthodontics. ***Assistant Professor, Department of Prosthodontics. 10/4/26177
to the shape of an edentulous ridge. Smooth the clay and paint it with the releasing agent. Place a 2mm thickness of Triad resin over the clay and adapt it to the cured composite resin. Smooth the Triad resin with sculpting instruments and cure for 10 minutes. 5. Once cured, cool the prosthesis in air and separate it from the cast. Finish the light-cured acrylic resin as for any conventional acrylic resin. Remove the modeling clay from the open top part of the flange, and smooth the inner and outer surfaces of any roughness. Paint the internal surface of the buccal flange with mono-poly viscous resin 3 and polish the outer surfaces (Fig. 2). The resulting interim prosthesis is light in weight, strong, and dimensionally stable. In addition, fabrication time permits the patient to receive the interim prosthesis in 1 day. REFERENCES 1. Caputo TL, Ryan JD. An easy, fast technique for making immediate surgical obturators. J PROSTHET DENT 1989;61:473-5. 2. Oral K. Construction of a buccal flange obturator. J PROSTHET DENT 1979;41:193~7. 3, Gardner LK, Parr GR. Extending the longevity of temporary soft liners with a mono-poly coating. J PROSTHET DENT 1988;59:71-2. Reprint requests to: DE. L. KIRK GARDNER SCHOOL OF DENTISTRY MEDICAL COLLEGE OF GEORGIA AUGUSTA, GA 30912-1250
Fig. 2. Finished buccal flange prosthesis. Fig. 1. Triad material placed on cast and smoothed for light cure. Note that rest and retentive arms are in position so that cast is visible at base of defect.
862
JUNE 1991
VOLUME 65 NUMBER 6
