Multiple custom anterior guide tables made from a single stock incisai table

TIPS

FROM

OUR

READERS

top of the first one. This procedure is usually unsatisfactory because it is difficult to bond the two layers and they separate at the edge. Laminating may be achieved by the folLowing procedure.

pressure, will usually fuse without trapping air (Fig. 2). They may be used for thermoforming immediately or allowed to cool for use when required. Reprint requests to:

OCEDURE

MR. R. G. JAGGER DEPARTMENT OF PROSTHETIC DENTISTRY UNIVERSITY OF WALES COLLEGE OF MEDICINE DENTAL SCHOOL HEATH PARK CARDIFF CF4 4xy UNITED KINGDOM

1. Place two blanks of the appropriate thickness together and align their edges. 2. Place the two blanks in a preheated oven at a temperature of 65” to 70’ C (149’ to 158” F) for approximately 30 minutes. The two blanks will become tacky and, with light hand

ultiple custom incisal table

auterior

guide

Andre Hashem, DDSya and Steven Morgano, Boston University

aTeaching Fellow, Department of Prosthodontics. bAssociate Clinical Professor, Department of Prosthodontics.

10/4/40873

Fig. 1. Shellac baseplate with gray modeling compound adapted to V-shaped grooves cut into stock incisal table.

JOURNAL

OF PROSTHETIC

DENTISTRY

made from

a single

stock

DMDb

Goldman School of Graduate Dentistry,

The vertical and horizontal overlap of the anterior teeth is referred to as the anterior guidance. This relationship of the anterior teeth is preserved on an articulator with the anterior guide table. When a mechanical table cannot be programmed to simulate the anterior guidance, a custommade anterior guide table is needed.l Many commonly used semiadjustable articulators (for example, from Denar Corp., Anaheim, Calif.) include a nylon stock in&al table that can be customized with autopolymerizing acrylic resin. A method is presented to maxi-

THE

tables

Boston, Mass. mize the use of this flat table whereby multiple terior guide tables can be made and stored.

custom an-

PROCEDURE 1. Cut V-shaped grooves on the sides of the nylon stock in-

cisal table. 2. Cut a piece of shellac base plate to conform to the borders of the table. 3. Lubricate the grooves with petroleum jelly, and place the piece of shellac on the table. Heat gray modelling compound, temper it in a water bath, and adapt it to the grooves. Remove excess compound with a scalpel blade, and lute the compound to the shellac base with a heated instrument (Fig. 1). 4. Wax the shellac to the table with sticky wax to ensure stability.

Fig. 2. Completed custom anterior guide table that can be removed and stored for later use.

863

TIPS

5. Wet the shellac with resin monomer and fabricate the customized anterior guide table in an autopolymerizing acrylic resin (Duralay, Reliance Dental Mfg. Co., Worth, Ill.) (Fig. 2). This custom anterior guide table can be stored for later use, and the stock incisal table Can be reused any number of times to repeat the procedure for other patients.

FROM

OUR

READERS

Reprint requests to: DR. ANDRE F. HASHEM DEPARTMENT OF PROSTHODONTICS BOSTON UNIVERSITY GOLDMAN SCHOLL OF GRADUATE DENTIS~~ZY 100 EAST NEWTON ST. BOSTON, MA 02118

REFERENCE 1. Damson PE. Evaluation, diagnosis,and treatment of occlusal problems. 2nd. ed. St Louis: CV Mmby, 1989;291-7.

ontrol David N. Firtell,

of thermoplastic

border

DDS, MA,a and Jack H. Koumjian,

The Veterans Home of California, Dentistry, San Francisco, Calif.

Yountville,

molding

materials

DDS, MSDb

Calif., and the University

of California,

San Francisco, School of

Modeling stick compound is often used to correct the borders of custom-made impression trays for com$ete dentures or altered cast procedures for extension base removable partial dentures. l, 2 A modified glue gun makes handling of a stick of modeling compound more efficient. Similar materials can also be used in the same manner. Select an inexpensive mini glue gun (F.P.C. Corp., Buffalo Grove, Ill.) (Fig. 1) with a barrel that uses sticks of glue that approximate the diameter of stick modeling compound. Enlarge the bore of the nozzle of the gun with a large

BChief Dentist,

Veterans Home of California,

Yountville,

and

Clinical Professor, University of California, San Francisco, School of Dentistry. bAssistant Clinical Professor, Restorative Dentistry, California, San Francisco, School of Dentistry.

10/4/40831

University

of

Fig. 1. A glue gun is selected that uses sticks of glue (A) that are the same diameter as sticks of modeling compound 03).

Fig. 2. The glue gun is connected to the Varac transformer

to control the temperature.

A, Metal box; B, dial of Varac transformer; C, ON/OFF switch; D, fuse; E, outlet plug with ground; F, glue gun and cord. 864

NOVEMBER

1992

VOLUME

68

NUMBER