Technique for mounting removable partial dentures on an articulator

Dental technology DANIEL H. GEHL and S. HOWARD PAYNE, Associate Editors

Technique

for mounting

removable

partial

dentures

on an articulator Phillip V. Reitz, D.D.S. Naval Dental Clinic, Yokosuka, Japan

1 here are many occasions when it becomes necessary to correct the occlusion of a removable partial denture. Occlusal discrepancies after a partial denture reline proin the cedure and drifting of opposing teeth are but two examples. Equilibration mouth is both difficult and time consuming. The technique presented will obviate many of the problems inherent in the mounting of removable partial dentures on

an articulator. The opinions or assertions contained herein are the private ones of the author and are not to be construed as official or reflecting the views of the Navy Department or the Naval Service at large.

Fig. 1. An irreversible hydrocolloid impression with the removable partial denture seated. 490

F2Z~‘4’

Fig. 2. Low-fusing

Mounting

metal is poured into the natural

Fig. 3. Several paper clip retentive blocked

dentures on articulator

491

teeth of the impression.

loops are inserted

into the metal and tissue undercols

?I

out with wet pumice.

TECHNICAL PROCEDURE 1. Seat the removable partial denture into the mouth. 2. Make an impression in irreversible hydrocolloid. 3. Remove the impression with the removable partial denture from the nlout11. If the removable partial denture remains in the mouth; remove and carefully rexrt into the impression (Fig. 1) .

492

J. Pros. Dent. October, 1969

Reitz

Fig. 4. Metal

and plaster cast removed

Fig. 5. All retentive

undercuts

from the impression

material.

have been removed from the metal teeth.

Volume 22 Number

4

Mounting

dentures on articulator

493

4. Remove any impression material that covers the denture border. 5. Pour low-fusing metal (Melotte’s metal, melting point 202’ F.) into tire impression of the natural teeth (Fig. 2). 6. Bend portions of paper clips into a “U” shape. 7. Heat the paper clips to a cherry-red color and seat into the cooled metal. 8. Block out all undercuts on the tissue side of the removable partial denture with asbestos, wet pumice, or clay (Fig. 3). 9. Pour plaster of Paris or artificial stone into the impression covering the mctai and the tissue areas of the appliance to complete the cast. Do not vibrate the in]pression during the pour; carefully tease into the paper clip loops and the saddle areas. 10. Allow plaster to set and remove the cast with the removable partial denture from the impression (Fig. 4). 11. Remove the retentive undercuts from the clasped teeth with a sharp blada (Fig. 5). 12. Remove the prosthesis from the cast and return it to the mouth for thrb rvcording of maxillomandibular records.

Fig. 6. The partial denture has been removed from the cast.

494

J. Pros. Dent. October, 1969

Reitz

ADVANTAGES

OF THE TECHNIQUE

1. The partial denture may be removed from the cast for recording the maxillomandibular relationship in any manner and any material that is required (Fig. 6). 2. The natural teeth of the cast do not chip or wear down during the equilibration of the partial denture. 3. The cast can be poured and separated in 10 to 15 minutes if plaster and “slurry water” are used.

SUMMARY A technique has been presented for mounting a partial denture or partial dentures on an articulator. The method is time saving and accurate. No change in the usual procedures is necessary to make use of this technique. NAVAL DENTAL CLINIC

Box 65-1914 FPO SEATTLE, WASH. 98765