TIPS
FROM
OUR
READERS
covered with heat-cured ac:rylic resin to seal the characterization from direct contact with the oral environment so that deterioration does not take place.
REFERENCES 1. Tillman EJ. Moulding and staining THET DENT 1955;5:497-507. 2. Payne SH. Construction of custom 1975;19:333-46.
Fig. 2. Lingual
and labial
view of different
characteriza-
Reprint
Lions.
shade selection
using
a porcelain
George J. Gerdts, DDS,a and David F. Murchison,
DDSb School of Dentistry,
and Indiana
University,
anterior
teeth.
Dent
teeth. Clin
J PROS-
North
Am
requests to:
Rhein-Main
Gir Base, Germany,
denture
resin
DR. CON JOOSTE FACULTY OF DENTISTRY UNIVERSITY OF STELLENBOSCH PRIVATE BAG Xl P.O. TYGERBERG 7505 REPUBLIC OF SOUTH AFRICA
a subtle effect to the stains without the harshness of surface staining (Fig. 2). During the waxing of the denture, the check lines should be covered with a thin layer of wax on the lingual surface of the teeth. These regions should be
nomer
acrylic
shade gui
Indianapolis,
Ind.
The optical property of glass ionomer cement is poor compared with composite resins and porcelain. In addition, the shade selection system of one glass ionomer cement (Ketac-Fil, ESPE, Seefeld, West Germany) is difficult because there is no easy way to identify the shade of a given capsule and, clinically, the shade obtained is often different than the corresponding shade tab. An alternative method of shade selection using the Vita Lumin Vacuum shade guide (Vita Zahnfabrik, Bad Sackingen, West Germany) is presented. The photograph (Fig. 1) identifies the shades that Ketac-Fil cement color-coded capsules represent. A sample was made of each of the seven Ketac-Fil cement shades, varnished, allowed to set for 15 minutes, polished wet, and placed in water. One week later, the color was evaluated by use of the Vita shade guide and the Ketac-Fil
The opinions and views expressed herein are those of the authors and do not reflect the official policy or position of the department of the Air Force or the Department of Defense. BLieutenant Colonel, U.S. Air Force, DC; Assistant Base Dental Surgeon, Rhein-Main Air Base. bMajor, U.S. Air Force, DC; Fellow, Department of Dental Materials, Indiana University, School of Dentistry. 10/4/31348
280
Fig. 1. Clockwise brown,
from top: light, yellow, grey, grey-brown, and dark-grey.
FEBRUARY
1992
VOLUME
yellow-brown,
67
NUMBER
2
TIPS
FROM
OUR
READERS
1. Ketae-Fil cement selection using Vita Lumin shadeguide
Table
Ketac-Fil
cement
sample
Vita
Light Yellow Yellow-brown Grey Grey-brown Dark-grey
shade
B-l A-3 A-3.5 c-3 A-4 c-4
bleaching Michael
Lumen
shade guide. Six of the samplesproduced an acceptable match with the Vita shade guide (Table I). The brown Ketac-Fil cement sample was closest to Vita A-4 shade guide but was more brown in Hue.
J. Wahl,
of a single
Reprint
requests to:
DR. DAVID F. MURCHISON KEESLER TTC, MED CTR/SGD KEESLER AFB, MS 39534-5300
tooth
DDSa
Medical Center of Delaware, Wilmington, Del. ‘“At-home bleaching” with 10% carbamide peroxide and vacuum-formed splints is gaining wide acceptance as a simple, safe, and effective technique to lighten teeth (Fig. 1). Among its advantagesover in-office bleachinglights and wands are (1) lesschair time for the patient and the dentist, (2) less operative and postoperative discomfort, (3) easeof “touch up” treatments if necessary,and (4) usually lessexpenseto the patient. A disadvantage of vacuum-formed splints used to hold the carbamide peroxide solution against the teeth is the inability to bleach a single darkened tooth (for example, a discolored endodontically treated tooth). A resolution to this problem is the useof a preformed plastic crown form to hold the solution against the tooth. BAssistant 10/4/31350
2. Preformed plastic crown form trimmed and in place. Fig.
attending.
Fig. 9. Darkened endodontically treated lateral incisor.
THE
JOURNAL
OF PROSTHETIC
DENTISTRY
Fig.
3. Post-bleaching of lateral incisor shown in Fig. 1.
281
FROM
OUR
READERS
covered with heat-cured ac:rylic resin to seal the characterization from direct contact with the oral environment so that deterioration does not take place.
REFERENCES 1. Tillman EJ. Moulding and staining THET DENT 1955;5:497-507. 2. Payne SH. Construction of custom 1975;19:333-46.
Fig. 2. Lingual
and labial
view of different
characteriza-
Reprint
Lions.
shade selection
using
a porcelain
George J. Gerdts, DDS,a and David F. Murchison,
DDSb School of Dentistry,
and Indiana
University,
anterior
teeth.
Dent
teeth. Clin
J PROS-
North
Am
requests to:
Rhein-Main
Gir Base, Germany,
denture
resin
DR. CON JOOSTE FACULTY OF DENTISTRY UNIVERSITY OF STELLENBOSCH PRIVATE BAG Xl P.O. TYGERBERG 7505 REPUBLIC OF SOUTH AFRICA
a subtle effect to the stains without the harshness of surface staining (Fig. 2). During the waxing of the denture, the check lines should be covered with a thin layer of wax on the lingual surface of the teeth. These regions should be
nomer
acrylic
shade gui
Indianapolis,
Ind.
The optical property of glass ionomer cement is poor compared with composite resins and porcelain. In addition, the shade selection system of one glass ionomer cement (Ketac-Fil, ESPE, Seefeld, West Germany) is difficult because there is no easy way to identify the shade of a given capsule and, clinically, the shade obtained is often different than the corresponding shade tab. An alternative method of shade selection using the Vita Lumin Vacuum shade guide (Vita Zahnfabrik, Bad Sackingen, West Germany) is presented. The photograph (Fig. 1) identifies the shades that Ketac-Fil cement color-coded capsules represent. A sample was made of each of the seven Ketac-Fil cement shades, varnished, allowed to set for 15 minutes, polished wet, and placed in water. One week later, the color was evaluated by use of the Vita shade guide and the Ketac-Fil
The opinions and views expressed herein are those of the authors and do not reflect the official policy or position of the department of the Air Force or the Department of Defense. BLieutenant Colonel, U.S. Air Force, DC; Assistant Base Dental Surgeon, Rhein-Main Air Base. bMajor, U.S. Air Force, DC; Fellow, Department of Dental Materials, Indiana University, School of Dentistry. 10/4/31348
280
Fig. 1. Clockwise brown,
from top: light, yellow, grey, grey-brown, and dark-grey.
FEBRUARY
1992
VOLUME
yellow-brown,
67
NUMBER
2
TIPS
FROM
OUR
READERS
1. Ketae-Fil cement selection using Vita Lumin shadeguide
Table
Ketac-Fil
cement
sample
Vita
Light Yellow Yellow-brown Grey Grey-brown Dark-grey
shade
B-l A-3 A-3.5 c-3 A-4 c-4
bleaching Michael
Lumen
shade guide. Six of the samplesproduced an acceptable match with the Vita shade guide (Table I). The brown Ketac-Fil cement sample was closest to Vita A-4 shade guide but was more brown in Hue.
J. Wahl,
of a single
Reprint
requests to:
DR. DAVID F. MURCHISON KEESLER TTC, MED CTR/SGD KEESLER AFB, MS 39534-5300
tooth
DDSa
Medical Center of Delaware, Wilmington, Del. ‘“At-home bleaching” with 10% carbamide peroxide and vacuum-formed splints is gaining wide acceptance as a simple, safe, and effective technique to lighten teeth (Fig. 1). Among its advantagesover in-office bleachinglights and wands are (1) lesschair time for the patient and the dentist, (2) less operative and postoperative discomfort, (3) easeof “touch up” treatments if necessary,and (4) usually lessexpenseto the patient. A disadvantage of vacuum-formed splints used to hold the carbamide peroxide solution against the teeth is the inability to bleach a single darkened tooth (for example, a discolored endodontically treated tooth). A resolution to this problem is the useof a preformed plastic crown form to hold the solution against the tooth. BAssistant 10/4/31350
2. Preformed plastic crown form trimmed and in place. Fig.
attending.
Fig. 9. Darkened endodontically treated lateral incisor.
THE
JOURNAL
OF PROSTHETIC
DENTISTRY
Fig.
3. Post-bleaching of lateral incisor shown in Fig. 1.
281
