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Esthetic consideration of a labial bar major connector
Esthetic consideration of a labial bar major connector Izharul H a q u e Ansari, BDS, MDS a Jordan University of Science and Technology, Irbid, Jordan The labial bar major connector has a limited application; however, in the infrequent cases when it is indicated, there may be no feasible alternative.1 Where esthetics is of prime importance, it might not be appreciated by the patient even if the labial bar is properly designed to satisfy all other essential requirements. The following procedure improves the appearance of a labial bar major connector by using visible light-cured (VLC) denture base resin (Triad, Dentsply International Inc., York, Pa.). 2-5
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PROCEDURE 1. Cast the partial denture framework with a mesh-type labial bar, with 0.5 mm relief in the usual manner (Fig. 1, A and B). 2. Finish and polish the framework and process the denture bases. 3. Sandblast only the mesh portion of the labial bar to enhance retention of the pink opaque material (to be applied in step 5). ~Assistant Professor, Department of Prosthodontics. J PROSTHETDENT1995;74:321-2 Copyright 9 1995 by The Editorial Council of THE JOURNALOF PROSTHETICDENTISTRY. 0022-3913/95/$3.00 + 0. 1014165379
J Fig. 1. A, Sagittal section of lower incisor region illustrates position of mesh labial bar; B, labial bar in form of mesh; C, sagittal section of lower incisor region illustrates form and position of mesh labial bar covered with VLC denture base resin. Relief of 0.25 mm under fmished veneered bar prevents impingement of gingival margins and labial tissues. D, Facial view of veneered mesh labial bar.
Fig. 2. Esthetics with veneered mesh labial bar of patient with severe inoperable lingual tori.
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4. Rinse the labial b a r i n water, place it i n a n ultrasonic cleaner in acetone solution for 3 minutes, then remove a n d dry it. Do not permit the processed acrylic resin d e n t u r e bases to contact the acetone. 5. P a i n t a t h i n coat of a pink opaque (vinyl opaquer pink No. 3527-13, Howmedica, Inc., Chicago, Ill.) over the entire labial surface of mesh labial b a r to prevent the metal from showing through the VLC resin. 6. Allow the pink opaque to dry. 7. Place some VLC d e n t u r e base resin with a drop or two of monomer liquid around the mesh labial bar and seat the removable partial denture (RPD) framework in the mouth; press a n d move the lower lip against the material to establish the proper contour as it flows. 8. Position a hand-held visible-light source over the resin for 1 m i n u t e to obtain a n initial setting in the mouth. 9. Remove the RPD, apply a coating of Triad air-barrier liquid to the VLC resin material, place it in the laboratory light-curing unit, and cure for 10 minutes. 10. Finish the resin to the cervical margins of the anterior teeth following the contour of the gingival margins, carve the labial surface with a carbide bur, and stipple it to enhance the appearance (Fig. 1, C and D, and Fig. 2).
11. Make slight relief of gingival m a r g i n s with slowsetting stone; relieve the side of the VLC resin approximately 0.25 m m (Fig. 1, C). 12. Polish a n d insert the denture. This veneered mesh labial b a r will not be as obvious as a polished metal bar (Fig. 2).
REFERENCES 1. Grasso JE, Miller EL. Removablepartial prosthodontics. 3rd ed. St Louis: C V MosbyCo; 1991:187 2. OgleRE, SorensenSE, LewisEA. A new visiblelight-curedresin system applied to removable presthodontics. J PROSTHETDENT1986; 56:497-506. 3. FellmanS, PmfalS. The use ofvisiblelight-cureresins for denture services in the nursing home. J Conn State Dent Assoc 1987;61:226-9. 4. DentsplyTriad visiblelight-cure systemtechniquemanual.York, Pa: Dentsply International,Inc., 1984. 5. Fellman S. Visiblelight-cure denture base resin used in makingdentures with conventionalteeth. J PROSTHETDENT1989;62:356-9. Reprint requests to:
DR. I. H. ANSAPJ FACULTY OF DENTISTRY JORDAN UNIVERSITYOF SCIENCE AND TECHNOLOGY IRBID JORDAN
Availability of JOURNAL B a c k Issues As a service to our subscribers, copies of back issues of THE JOURNAL OF P R O S T H E T I C DENTISTRYfor the preceding 5 years are m a i n t a i n e d a n d are available for purchase from the publisher, Mosby, at a cost of $9.00 per issue. The following q u a n t i t y discounts are available: 25% o f t e n quantities of 12 to 23, and one third o f t e n quantities of 24 or more. Please write to Mosby, Subscription Services, 11830 Westline Industrial Drive, St. Louis, M e 63146-3318, or call (800)453-4351 or (314)453-4351 for information on availability of particular issues. If unavailable from the publisher, photocopies of complete issues are available from University Microfilms International, 300 N. Zeeb Rd., A n n Arbor, MI 48106, (313)761-4700.
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PROCEDURE 1. Cast the partial denture framework with a mesh-type labial bar, with 0.5 mm relief in the usual manner (Fig. 1, A and B). 2. Finish and polish the framework and process the denture bases. 3. Sandblast only the mesh portion of the labial bar to enhance retention of the pink opaque material (to be applied in step 5). ~Assistant Professor, Department of Prosthodontics. J PROSTHETDENT1995;74:321-2 Copyright 9 1995 by The Editorial Council of THE JOURNALOF PROSTHETICDENTISTRY. 0022-3913/95/$3.00 + 0. 1014165379
J Fig. 1. A, Sagittal section of lower incisor region illustrates position of mesh labial bar; B, labial bar in form of mesh; C, sagittal section of lower incisor region illustrates form and position of mesh labial bar covered with VLC denture base resin. Relief of 0.25 mm under fmished veneered bar prevents impingement of gingival margins and labial tissues. D, Facial view of veneered mesh labial bar.
Fig. 2. Esthetics with veneered mesh labial bar of patient with severe inoperable lingual tori.
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T H E JOURNAL OF PROSTHETIC DENTISTRY
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4. Rinse the labial b a r i n water, place it i n a n ultrasonic cleaner in acetone solution for 3 minutes, then remove a n d dry it. Do not permit the processed acrylic resin d e n t u r e bases to contact the acetone. 5. P a i n t a t h i n coat of a pink opaque (vinyl opaquer pink No. 3527-13, Howmedica, Inc., Chicago, Ill.) over the entire labial surface of mesh labial b a r to prevent the metal from showing through the VLC resin. 6. Allow the pink opaque to dry. 7. Place some VLC d e n t u r e base resin with a drop or two of monomer liquid around the mesh labial bar and seat the removable partial denture (RPD) framework in the mouth; press a n d move the lower lip against the material to establish the proper contour as it flows. 8. Position a hand-held visible-light source over the resin for 1 m i n u t e to obtain a n initial setting in the mouth. 9. Remove the RPD, apply a coating of Triad air-barrier liquid to the VLC resin material, place it in the laboratory light-curing unit, and cure for 10 minutes. 10. Finish the resin to the cervical margins of the anterior teeth following the contour of the gingival margins, carve the labial surface with a carbide bur, and stipple it to enhance the appearance (Fig. 1, C and D, and Fig. 2).
11. Make slight relief of gingival m a r g i n s with slowsetting stone; relieve the side of the VLC resin approximately 0.25 m m (Fig. 1, C). 12. Polish a n d insert the denture. This veneered mesh labial b a r will not be as obvious as a polished metal bar (Fig. 2).
REFERENCES 1. Grasso JE, Miller EL. Removablepartial prosthodontics. 3rd ed. St Louis: C V MosbyCo; 1991:187 2. OgleRE, SorensenSE, LewisEA. A new visiblelight-curedresin system applied to removable presthodontics. J PROSTHETDENT1986; 56:497-506. 3. FellmanS, PmfalS. The use ofvisiblelight-cureresins for denture services in the nursing home. J Conn State Dent Assoc 1987;61:226-9. 4. DentsplyTriad visiblelight-cure systemtechniquemanual.York, Pa: Dentsply International,Inc., 1984. 5. Fellman S. Visiblelight-cure denture base resin used in makingdentures with conventionalteeth. J PROSTHETDENT1989;62:356-9. Reprint requests to:
DR. I. H. ANSAPJ FACULTY OF DENTISTRY JORDAN UNIVERSITYOF SCIENCE AND TECHNOLOGY IRBID JORDAN
Availability of JOURNAL B a c k Issues As a service to our subscribers, copies of back issues of THE JOURNAL OF P R O S T H E T I C DENTISTRYfor the preceding 5 years are m a i n t a i n e d a n d are available for purchase from the publisher, Mosby, at a cost of $9.00 per issue. The following q u a n t i t y discounts are available: 25% o f t e n quantities of 12 to 23, and one third o f t e n quantities of 24 or more. Please write to Mosby, Subscription Services, 11830 Westline Industrial Drive, St. Louis, M e 63146-3318, or call (800)453-4351 or (314)453-4351 for information on availability of particular issues. If unavailable from the publisher, photocopies of complete issues are available from University Microfilms International, 300 N. Zeeb Rd., A n n Arbor, MI 48106, (313)761-4700.
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