Improved William
acrylic
T. Buchanan,
DDS,
resin provisional MS, and
Arlon
G. Poshadley,
restorations DDS,
MS
University of Louisville School of Dentistry, Louisville, Ky. A problem in the fabrication of provisional restorations constructed with autopolymerizing acrylic resin is excessive shrinkage of the material at the thin gingival margin. The method presented provides an adequate bulk of acrylic resin to partially overcome this difficulty and provide improved marginal accurac,y.
Reprint requeststo: DR. ARLON SCHOOL OF UNIVERSITY LOUISVILLE,
G. PODSHADLEY DENTISTRY OF LOUISVILLE KENTUCKY 40292
PROCEDURE
A 1 X 2 mm band of elastomeric impression material is injected around the gingival surfaces of a cast of the teeth to be prepared (Fig. 1). A vacuum-formed splint or stent is adapted to the modified cast (Fig. 2). The splint, filled with a mix of autopolymerizing resin, is adapted to a cast of the prepared teeth, and the resin allowed to polymerize (Fig. 3). The polymerized resin is removed from the cast, separated from the thin splint material, and refined. The additional bulk of acrylic resin provides better margin adaptation and gingival contour of the completed provisional restoration. 2. An Omnivac splint is constructed on the modified stone cast.
Fig. 10/4/36316
Fig. 1. A band of light-‘bodied rubber base material is injected around the gingival areas of the tooth to be prepared.
890
3. Bulky gingival margins result when the acrylic temporary restoration is constructed.
Fig.
JUNE
1992
VOLUME
67
NUMBER
6
acrylic
T. Buchanan,
DDS,
resin provisional MS, and
Arlon
G. Poshadley,
restorations DDS,
MS
University of Louisville School of Dentistry, Louisville, Ky. A problem in the fabrication of provisional restorations constructed with autopolymerizing acrylic resin is excessive shrinkage of the material at the thin gingival margin. The method presented provides an adequate bulk of acrylic resin to partially overcome this difficulty and provide improved marginal accurac,y.
Reprint requeststo: DR. ARLON SCHOOL OF UNIVERSITY LOUISVILLE,
G. PODSHADLEY DENTISTRY OF LOUISVILLE KENTUCKY 40292
PROCEDURE
A 1 X 2 mm band of elastomeric impression material is injected around the gingival surfaces of a cast of the teeth to be prepared (Fig. 1). A vacuum-formed splint or stent is adapted to the modified cast (Fig. 2). The splint, filled with a mix of autopolymerizing resin, is adapted to a cast of the prepared teeth, and the resin allowed to polymerize (Fig. 3). The polymerized resin is removed from the cast, separated from the thin splint material, and refined. The additional bulk of acrylic resin provides better margin adaptation and gingival contour of the completed provisional restoration. 2. An Omnivac splint is constructed on the modified stone cast.
Fig. 10/4/36316
Fig. 1. A band of light-‘bodied rubber base material is injected around the gingival areas of the tooth to be prepared.
890
3. Bulky gingival margins result when the acrylic temporary restoration is constructed.
Fig.
JUNE
1992
VOLUME
67
NUMBER
6
