TIPSFROMOURREADERS
PROCEDURE
Fig,
4. Adjustment completed following water spray.
nately dip a brush in the solvent and wipe it over the rouge to allow transfer to the framework. A spray suchasOcclude Aerosol (PascalCo., Inc., Bellevue, Wash.) allowsfor rapid placement on the framework but has a tendency to be messyon the handsand worktops. It is difficult to useif repeated applications and removals are required. A proprietory blue-colored disclosingmedium, Fixtector (Prodent, GmbH and Co., Bad Hamburg, W. Germany), which is specifically marketed for this purpose, has proved unreliable when applied becauseof difficulties with transfer to the framework with the supplied brush. Pressure relief cream(SybroniKerr, Romulus,Mich.) hasbeenfound to be more effective on acrylic resin than on metal frameworks.
The useof typist correcting fluid, TippCo.), was investigated. The solution is produced asa suspensionof titanium dioxide in trichloroethylene. An additional bottle of solvent can be purchasedto reducethe viscosity due to evaporation. A brush integral with the screw top allows for easy application to the framework (Fig. I). After application, useof an air syringewill aid drying and a thin opaquelayer of tinanium dioxide remains (Fig. 2). The framework is seatedon the teeth and surfacesof pressure will be clearly disclosedby the displacement of the medium (Fig. 3). Adjustment is done with a diamond bur in an air turbine with water spray (Fig. 4). Using an air turbine with no water spray results in metal particles remaining on the disclosingmedium. When adjustments are completed, the medium is simply removed in large fragments with a sharpinstrument. The useof alcohol and a cotton bud is equally effective. SUMMARY
An inexpensive disclosingmedium, availabllein any secretary’s office, has beenfound to be effective for adjusting removable partial denture frameworks at the chairside. Reprint
requests
to:
MR. TOBY R.TALBOT DEPARTMENT OF RESTORATIVE EASTMAN DENTAL HOSPITAL LONDON WC1 8LD ENGLAND
DENTISTRY
lac ent of a fractured tooth on a removable ture by using two visible light-cured resin syst Lawrence
S. Lipkin,
DDS,a
and Thomas
Wescott,
DDSa
TempleUniversity, Schoolof Dentistry, Philadelphia,Pa. When a denture tooth on a removable partial denture (RPD) fractures, a visible light-cured (VLC) resin (Triad, Dentsply International, York, Pa.) in conjunction with a, microfilled composite resin can be used to repair it in a simple, short, chairside procedure.l, 2
1. Remove the acrylic resin around the fractured tooth and seat the RPD in the mouth. 2. Make an irreversible hydrocolloid impressionand pour a cast with quick-set plaster (Fig. 1).
aAssistantProfessor,Departmentof Prosthodontics 1W4126184
THE
JOURNAL
OF PROSTHETIC
QENTISTRY
Fig.
1. Quick-set plaster cast with RPD in place.
283
TIP8
Fig.
2. Block-out
of undercut
regions
with wax.
Fig. 3. Denture base color VLC resin placed under retentive mesh of seated RPD.
Fig. 5. Completed resin.
Fig. 6. Final result showing RPD.
5. 6.
7. 8.
9. Fig.
4. Tooth-colored
VLC resin built
up as a core. 10.
3. Block out proximal undercuts with wax (Fig. 2) and lubricate the cast with separating medium in the region where the tooth is to be added. 4. Place a small amount of denture base VLC resin on the undersurface of the retentive mesh, press it into the 284
buildup
Il.
using
PROM
OUR
microfilled
polished,
READERS
composite
contoured
tooth on
mesh, and seat the RPD framework completely on the cast (Fig. 3). Cure this initial layer of VLC resin by using light from a visible-light source. With the RPD on the cast, build up the tooth to be replaced with a larger amount of appropriate tooth-colored VLC resin (Fig. 4). Remove the RPD from the cast and seat it in the mouth. The VLC resin will not slump. Guide the patient into maximum intercuspation to record the occlusal contacts in the uncured VLC resin. The material is still pliable, which facilitates establishing proper occlusal contacts. Use a chairside visible-curing light to achieve an initial set of the material that minimizes distortion when the RPD is removed from the mouth. Remove the RPD from the mouth and trim away any excess. Complete the curing of the material by using light from a visible-light source. Select the correct color match for the veneer. Pn some situations, modifiers or mixing of two colors may be required. FEBRUARY
1992
VOLUME
67
NUMBER
2
TIPS
FROM
OUR
READERS
12. Rougben the previously cured VLC and apply the bonding agent. 13. Apply a microfilled composite resin (Silux, 3M, Minneapolis, Minn.), building up the facial surface, and cure the resin (Fig. 5).3,4 14. Finish, contour, and polish the light-cured resin by using finishing diamonds and disks (Fig. 6).
A method has been described to repair or place a tooth on an RPD by veneering VLC resin with microfilled composite resin. The entire procedure is efficient, economical, and can be performed chairside. It minimizes the dentist’s dependency on an outside laboratory and presents minimal inconvenience to the patient.
Bound
volumes
available
REFERENCES 1. Nimmo A. Efficient denture repairs using a visible ligbwure resin. Compend Contin Educ Dent 1988;9:528-33. 2. Nimmo A. Correction of the posterior palatal seal by using a visible light-cured resin: a clinical report. J PROSTHET DENT 1988;59:529-31. 3. Weiner S, Krause AS, Nicholas W. Esthetic modification of removable partial denture teeth with a light-cured composite. J PROSTHET DENT 1987;57:381-4.
4. Phiilips RW. Skinner’s science of dental materials. WB Saunders Co, 1982;221.
8th ed. Philadelphia:
Reprint requests to: DR. LAWRENCE LIPKIN SCHOOL OF DENTISTRY TEMPLE UNIVERSITY 3223 N. BROAD ST. PHILADELPHIA. PA 19140
to subscribers
Bound volumesof THE JOURNAL OF PROSTHETIC DENTISTRY are available to subscribers (only) for the 1992issuesfrom the publisher at a cost of $55.00($68.00international) for Vol. 67 (January-June) and Vol. 68 (July-December). Shipping chargesare included. Each bound volume contains a subject and author index, and all advertising is removed. Copies are shipped within 30 days after publication of the last issuein the volume. The binding is durable buckram with the journal name, volume number, and year stamped in gold on the spine. Volumes 65 and 66 are also available. Payment must accompany all orders. Contact Mosby-Year Book, Inc., Subscription Services, 11830Westline Industrial Drive, St. Louis, MO 63146-3318,USA, phone (800) 325-4177,ext. 4351, or (314)453-4351. Subscriptions must be in force to qualify. in place of a regular JOURNAL subscription.
THE
JOURNAL
OF
PROSTHETIC
DENTISTRY
Bound
volumes
are not available
PROCEDURE
Fig,
4. Adjustment completed following water spray.
nately dip a brush in the solvent and wipe it over the rouge to allow transfer to the framework. A spray suchasOcclude Aerosol (PascalCo., Inc., Bellevue, Wash.) allowsfor rapid placement on the framework but has a tendency to be messyon the handsand worktops. It is difficult to useif repeated applications and removals are required. A proprietory blue-colored disclosingmedium, Fixtector (Prodent, GmbH and Co., Bad Hamburg, W. Germany), which is specifically marketed for this purpose, has proved unreliable when applied becauseof difficulties with transfer to the framework with the supplied brush. Pressure relief cream(SybroniKerr, Romulus,Mich.) hasbeenfound to be more effective on acrylic resin than on metal frameworks.
The useof typist correcting fluid, TippCo.), was investigated. The solution is produced asa suspensionof titanium dioxide in trichloroethylene. An additional bottle of solvent can be purchasedto reducethe viscosity due to evaporation. A brush integral with the screw top allows for easy application to the framework (Fig. I). After application, useof an air syringewill aid drying and a thin opaquelayer of tinanium dioxide remains (Fig. 2). The framework is seatedon the teeth and surfacesof pressure will be clearly disclosedby the displacement of the medium (Fig. 3). Adjustment is done with a diamond bur in an air turbine with water spray (Fig. 4). Using an air turbine with no water spray results in metal particles remaining on the disclosingmedium. When adjustments are completed, the medium is simply removed in large fragments with a sharpinstrument. The useof alcohol and a cotton bud is equally effective. SUMMARY
An inexpensive disclosingmedium, availabllein any secretary’s office, has beenfound to be effective for adjusting removable partial denture frameworks at the chairside. Reprint
requests
to:
MR. TOBY R.TALBOT DEPARTMENT OF RESTORATIVE EASTMAN DENTAL HOSPITAL LONDON WC1 8LD ENGLAND
DENTISTRY
lac ent of a fractured tooth on a removable ture by using two visible light-cured resin syst Lawrence
S. Lipkin,
DDS,a
and Thomas
Wescott,
DDSa
TempleUniversity, Schoolof Dentistry, Philadelphia,Pa. When a denture tooth on a removable partial denture (RPD) fractures, a visible light-cured (VLC) resin (Triad, Dentsply International, York, Pa.) in conjunction with a, microfilled composite resin can be used to repair it in a simple, short, chairside procedure.l, 2
1. Remove the acrylic resin around the fractured tooth and seat the RPD in the mouth. 2. Make an irreversible hydrocolloid impressionand pour a cast with quick-set plaster (Fig. 1).
aAssistantProfessor,Departmentof Prosthodontics 1W4126184
THE
JOURNAL
OF PROSTHETIC
QENTISTRY
Fig.
1. Quick-set plaster cast with RPD in place.
283
TIP8
Fig.
2. Block-out
of undercut
regions
with wax.
Fig. 3. Denture base color VLC resin placed under retentive mesh of seated RPD.
Fig. 5. Completed resin.
Fig. 6. Final result showing RPD.
5. 6.
7. 8.
9. Fig.
4. Tooth-colored
VLC resin built
up as a core. 10.
3. Block out proximal undercuts with wax (Fig. 2) and lubricate the cast with separating medium in the region where the tooth is to be added. 4. Place a small amount of denture base VLC resin on the undersurface of the retentive mesh, press it into the 284
buildup
Il.
using
PROM
OUR
microfilled
polished,
READERS
composite
contoured
tooth on
mesh, and seat the RPD framework completely on the cast (Fig. 3). Cure this initial layer of VLC resin by using light from a visible-light source. With the RPD on the cast, build up the tooth to be replaced with a larger amount of appropriate tooth-colored VLC resin (Fig. 4). Remove the RPD from the cast and seat it in the mouth. The VLC resin will not slump. Guide the patient into maximum intercuspation to record the occlusal contacts in the uncured VLC resin. The material is still pliable, which facilitates establishing proper occlusal contacts. Use a chairside visible-curing light to achieve an initial set of the material that minimizes distortion when the RPD is removed from the mouth. Remove the RPD from the mouth and trim away any excess. Complete the curing of the material by using light from a visible-light source. Select the correct color match for the veneer. Pn some situations, modifiers or mixing of two colors may be required. FEBRUARY
1992
VOLUME
67
NUMBER
2
TIPS
FROM
OUR
READERS
12. Rougben the previously cured VLC and apply the bonding agent. 13. Apply a microfilled composite resin (Silux, 3M, Minneapolis, Minn.), building up the facial surface, and cure the resin (Fig. 5).3,4 14. Finish, contour, and polish the light-cured resin by using finishing diamonds and disks (Fig. 6).
A method has been described to repair or place a tooth on an RPD by veneering VLC resin with microfilled composite resin. The entire procedure is efficient, economical, and can be performed chairside. It minimizes the dentist’s dependency on an outside laboratory and presents minimal inconvenience to the patient.
Bound
volumes
available
REFERENCES 1. Nimmo A. Efficient denture repairs using a visible ligbwure resin. Compend Contin Educ Dent 1988;9:528-33. 2. Nimmo A. Correction of the posterior palatal seal by using a visible light-cured resin: a clinical report. J PROSTHET DENT 1988;59:529-31. 3. Weiner S, Krause AS, Nicholas W. Esthetic modification of removable partial denture teeth with a light-cured composite. J PROSTHET DENT 1987;57:381-4.
4. Phiilips RW. Skinner’s science of dental materials. WB Saunders Co, 1982;221.
8th ed. Philadelphia:
Reprint requests to: DR. LAWRENCE LIPKIN SCHOOL OF DENTISTRY TEMPLE UNIVERSITY 3223 N. BROAD ST. PHILADELPHIA. PA 19140
to subscribers
Bound volumesof THE JOURNAL OF PROSTHETIC DENTISTRY are available to subscribers (only) for the 1992issuesfrom the publisher at a cost of $55.00($68.00international) for Vol. 67 (January-June) and Vol. 68 (July-December). Shipping chargesare included. Each bound volume contains a subject and author index, and all advertising is removed. Copies are shipped within 30 days after publication of the last issuein the volume. The binding is durable buckram with the journal name, volume number, and year stamped in gold on the spine. Volumes 65 and 66 are also available. Payment must accompany all orders. Contact Mosby-Year Book, Inc., Subscription Services, 11830Westline Industrial Drive, St. Louis, MO 63146-3318,USA, phone (800) 325-4177,ext. 4351, or (314)453-4351. Subscriptions must be in force to qualify. in place of a regular JOURNAL subscription.
THE
JOURNAL
OF
PROSTHETIC
DENTISTRY
Bound
volumes
are not available
