Composite removable
resin contouring partial dentures
George
Jr., D.D.S.,
H. Latta,
of abutment
teeth for rotational
path
MS.*
University of Tennessee, Memphis, College of Dentistry, Memphis, Tenn. The rotational path of insertion provides an alternative to conventional methods for obtaining retention of removable partial dentures.l Often an anterior-posterior rotation may be used to enhance a patient’s appearance by eliminating clasps on the maxillary anterior teeth. The use of this concept may sometimes be precluded because of unfavorable proximal surface tooth contours for the rigid retainers (Fig. 1). Techniques have been reported for preparation of lingual
*Associate
Professor,
Department
10/4/17191
TECHNIQUE
1. With a rubber dam, isolate the tooth having an unfavorable contour. 2. Acid-etch the gingival two thirds of the enamel surface to be recontoured. 3. Place sufficient light-cured composite resin to obtain desired contours and then cure. 4. Remove the rubber dam and make additional preparations as required (Fig. 2).
Fig.
1. Unfavorable proximal surface contour for rigid retainer.
Fig.
2. Composite resin proximal surface contour of abutment tooth. 3. Contour evaluated after placement of light-cured composite resin.
Fig.
716
of Prosthodontics.
rest seats in light-cured composite resin.2-4This procedure may be expanded to obtain the necessary proximal surface tooth contours for rotational path removable partial dentures.
JUNE
lSS0
VOLUME
63
NUMBER
6
TIPS
FROM
OUR READERS
The contours can be reevaluated before proceeding by making an irreversible hydrocolloid impression and pouring a cast in quick-setting stone (Fig. 3). Additional contouring may easily be obtained by repeating steps 1 and 3. In the event that the restoration becomes worn, it may be replaced by carefully seating the removable partial denture over more composite resin, light-curing 20 seconds with the removable partial denture in place, and then finishing the cure after removal of the prosthesis. REFERENCES 1. Krol AJ, Finzen FC. Rotational path removable partial dentures. Part 1. Replacement of posterior teeth. Part 2. Replacement of anterior teeth. Int ,J Prosthodont. 1989;1:17-27;135-42.
THE
JOURNAL
OF PROSTEIETIC
DENTISTRY
Toth RW, Fiebiger GE, Mackert JR Jr, Goldman BM. Shear strength of lingual rest seats prepared in bonded composite. J PROBTHET DENT 1986,56:99-104. Toth RW, Fiebiger GE, Mackert JR Jr, King GE, Goldman BM. Load cycling of lingual rest seats prepared in bonded composite. J PROSTHET DENT 1986;56:239-42. Latta GH Jr. A technique for preparation of lingual rest seats in lightcured composite. J PROSTHET DENT 1988;60:127.
Heprint requeststo: DR. GEORGE H. LA-WA, JR. COLLEGE OF DENTISTRY UNIVERSITY OF TENNESSEE, MEMPHIS 875 UNION AVE. MEMPHIS, TN 38163
717
resin contouring partial dentures
George
Jr., D.D.S.,
H. Latta,
of abutment
teeth for rotational
path
MS.*
University of Tennessee, Memphis, College of Dentistry, Memphis, Tenn. The rotational path of insertion provides an alternative to conventional methods for obtaining retention of removable partial dentures.l Often an anterior-posterior rotation may be used to enhance a patient’s appearance by eliminating clasps on the maxillary anterior teeth. The use of this concept may sometimes be precluded because of unfavorable proximal surface tooth contours for the rigid retainers (Fig. 1). Techniques have been reported for preparation of lingual
*Associate
Professor,
Department
10/4/17191
TECHNIQUE
1. With a rubber dam, isolate the tooth having an unfavorable contour. 2. Acid-etch the gingival two thirds of the enamel surface to be recontoured. 3. Place sufficient light-cured composite resin to obtain desired contours and then cure. 4. Remove the rubber dam and make additional preparations as required (Fig. 2).
Fig.
1. Unfavorable proximal surface contour for rigid retainer.
Fig.
2. Composite resin proximal surface contour of abutment tooth. 3. Contour evaluated after placement of light-cured composite resin.
Fig.
716
of Prosthodontics.
rest seats in light-cured composite resin.2-4This procedure may be expanded to obtain the necessary proximal surface tooth contours for rotational path removable partial dentures.
JUNE
lSS0
VOLUME
63
NUMBER
6
TIPS
FROM
OUR READERS
The contours can be reevaluated before proceeding by making an irreversible hydrocolloid impression and pouring a cast in quick-setting stone (Fig. 3). Additional contouring may easily be obtained by repeating steps 1 and 3. In the event that the restoration becomes worn, it may be replaced by carefully seating the removable partial denture over more composite resin, light-curing 20 seconds with the removable partial denture in place, and then finishing the cure after removal of the prosthesis. REFERENCES 1. Krol AJ, Finzen FC. Rotational path removable partial dentures. Part 1. Replacement of posterior teeth. Part 2. Replacement of anterior teeth. Int ,J Prosthodont. 1989;1:17-27;135-42.
THE
JOURNAL
OF PROSTEIETIC
DENTISTRY
Toth RW, Fiebiger GE, Mackert JR Jr, Goldman BM. Shear strength of lingual rest seats prepared in bonded composite. J PROBTHET DENT 1986,56:99-104. Toth RW, Fiebiger GE, Mackert JR Jr, King GE, Goldman BM. Load cycling of lingual rest seats prepared in bonded composite. J PROSTHET DENT 1986;56:239-42. Latta GH Jr. A technique for preparation of lingual rest seats in lightcured composite. J PROSTHET DENT 1988;60:127.
Heprint requeststo: DR. GEORGE H. LA-WA, JR. COLLEGE OF DENTISTRY UNIVERSITY OF TENNESSEE, MEMPHIS 875 UNION AVE. MEMPHIS, TN 38163
717
