Revitalizing defaced maxillary plastic denture teeth with resin stain

f&4ry p Joel O’Wam Martin, D.D.S., MS.,* and ?hrnad Rakuw, D.DS.*** [Jniversity

of Medicine

and Dentistry

Yede Baker-Dennis,

it denture

teeth

D.D.S.,**

of New Jersey, New Jersey Dental School, Newark,

N.J.

C

haracterization of individual acrylic teeth with resin stains is an accepted modality. The dentist has the potential to satisfactorily overcome a multitude of problems such as modifying the shade of the tooth, characterizing one or more teeth, rectifying an error in processing or finishing a denture, and repairing abraded resin teeth. *.\ssistant Pmfessor, Department of Restorative Dentistry. **Clinical Assistant Professor, Department of Restorative ***Professor. lhpartment of Restorative Dentistry.

Dentistry.

Fig. 3. Resin stains applied to conceal discolorations.

Fig. 1. Acrylic heated and /or

resin maxillary scorched.

teeth

have

been overFig. 4. Original pronounced teeth is markedly reduced.

Fig. 2. Blanched mm. 434

resin

reduced

to a depth

discoloration

of maxillary

of 0.5 to 1 Fig. 5. Corrected

dentures

MARCH

1985

in place in mouth. VOLUME

53

NUMBER

3

RESIN

STAIN

FOR

REVITALIZING

DENTURE

TEETH

The following procedure describes correction of a maxillary denture with blanched or scorched acrylic resin teeth caused by overheating (Fig, 1). TECHNIQUE 1. Reduce the blanched surfaces of the teeth 0.5 to 1 mm. This may not eliminate all the discoloration, which could be 3 mm in depth. However, it does provide a depth of overlay to conceal the discoloration without overcontouring (Fig. 2). 2. Use a Den Mat Rembrandt kit (Den-Mat Corp., Santa Maria, Calif.) to stain the reduced surfaces with the preselected shades of gingival and incisal colors (Fig. 3). The results obtained are satisfactory but not equal to the original unblemished teeth.

Putty materials denture bases Ralph W. Mitchener, Loyola

University,

School

3. Apply a thick coat of clear acrylic resin over the stained surface to preclude abrasion of the stains if additional correction of the denture borders is required. Polish with a ragwheel and pumice. The high gloss is considered a practical necessity to maintain the basic application (Fig. 4) even though there is a visible difference from other teeth (Fig. 5). Past experience has shown that at least 1 to 1.5 mm of the discolored acrylic resin must be reduced to completely conceal the defect.

Reprint

requests

for stable removable

D.D.S.,*

and Mitchell

of Dentistry,

Maywood,

D. Omori,

to:

DR. YEDE B. DENNIS UNIVERSITY OF MEDICINE AND DENTISTRY NEW JERSEY DENTAL SCHOOL NEWARK, NJ 07103

OF NEW JERSEY

partial

B.S.**

Ill.

M

any techniques and materials are used for the construction of recording bases on frameworks for distal extension removable partial dentures.‘” Disadvantages of acrylic resin bases are that undercuts must be blocked out and that the base must be removed from the framework before the artificial teeth are arranged or after the try-in. Wax bases are dimensionally unstable and distort at mouth temperature.4 Techniques that use materials in the mouth to form the base are inaccurate.3 Bases must be constructed on the master cast because no two impressions of soft tissue can be identical. High-viscosity elastomers (putty material) such as Coe Speedtray (Coe Laboratories, Inc., Chicago, Ill.), Citricon (Kerr Mfg. Co., Romulus, Mich.), and others have been shown to be stable.5 The putty material is used to form the base. The material locks into the framework and the two become a single unit. TECHNIQUE 1. Soak the cast in water or apply a separating medium. 2. Place a mix of high-viscosity elastomer putty on the edentulous ridge of the master cast. *Associate **Dental

Professor, student,

THE JOURNAL

Department of Removable Prosthodontics. Loyola University, School of Dentistry.

OF PROSTHETIC

DENTISTRY

Fig. 1. Framework seated on master cast and into putty material to form stable unit for making jaw relation records. 3. Seat the framework on the cast and into the putty material with only the rests used to position the framework to the cast (Fig. 1). 4. Allow the putty to set, and trim off the excess material (Fig. 2). 5. Apply a tray adhesive to the putty because wax will not adhere to putty material. 6. Construct the occlusion rims, make the centric relation record (Fig. 3), and place on an articulator. 435