TIPS
An alternative Gary
R. Goldstein,
immediate
complete
denture
impression
FROM
OUR READERS
technique
DDSa
Kriser Dental Center, New York University, New York, N.Y. Patients presenting for immediate denture therapy may have the remaining teeth., which are extremely mobile, extracted by routine impression procedures. The purpose of this article is to present an impression technique that can prevent extraction of these teeth (Fig. 1). Before taking impressions of mobile teeth, the following regions are blocked out with wax or clay. 1. Embrasures of teeth with closed contact points
BProfessor,Division of Restorative and Prosthodontic Sciences, Director of Prosthodontic Research. 10/4/36284
1. Condition of the teeth before impressions were made. Fixed partial denture with class III + mobility.
Fig.
2. Fixed partial denture pontics that do not make tissue contact 3. Undercuts on remaining teeth PRELIMINARY
IMPRESSION
An irreversible hydrocolloid impression is made in a disposable stock acrylic resin tray. The borders of the tray are corrected with modeling compound or baseplate wax (Fig. 2). Holes, which are large enough to accommodate the end of an amalgam condenser, are prepared through the tray directly over the incisal or occlusal surfaces of the questionable teeth. When the impression is ready to be removed from the oral cavity, the assistant places the amalgam con-
3. Irreversible hydrocolloid preliminary impression about to be removed from oral cavity. The amalgam condensers are being pushed apically through previously prepared holes in the impression tray.
Fig.
4. Preliminary impression with the holes at the incisal edges of the mandibular left and right canines where the amalgam condensers were inserted.
Fig. Fig. WaX.
892
2. Stock tray border-molded
with pink baseplate
JUNE
1992
VOLUME
67
NUMBER
6
TIPS
FROM
OUR READERS
Fig. 5. Autopolymerizing acrylic resin tray. Undercut finger rests in the molar region also aid in retention of the irreversible hydrocolloid impression.
Fig. 7. Combined zinc oxideleugenol irreversible hydrocolloid impression. Amalgam condensers were again used in facilitating removal of the impression without extracting mobile fixed partial denture.
impression is replaced in the oral cavity. A large or extra large stock disposable acrylic resin impression tray is again prepared with holes over the mobile teeth to receive the amalgam condensers. The teeth are dried, undercuts are blocked out, and irreversible hydrocolloid is wiped over the teeth and into the mucolabial fold. The tray, filled with irreversible hydrocolloid, is then placed in the patient’s mouth over the first-stage impression. Removal, without extraction of any teeth, is facilitated by the use of the amalgam condensers (Fig. 7).
Fig. 6. Zinc oxide/eugenol impression in the oral cavity.
densers through the holes and pushes the teeth gingivally as the tray is removed (Figs. 3 and 4). SECONDARY
IMPRESSION
Where teeth have mobility, a two-piece impression is preferred.l A custom, acrylic resin impression tray is fabricated with undercuts in the finger rest areas to aid in the retention of the second-stage irreversible hydrocolloid impression (Fig. 5). The impression tray is border-molded and a zinc oxide/eugenol paste impression is made (Fig. 6). The impression is removed, the excessis trimmed away, and the
THE
JOURNAL
OF PROSTHETIC
DENTISTRY
SUMMARY An alternative immediate denture impression technique for extremely mobile teeth, utilizing amalgam condensers, has been presented. The apically applied pressure on the mobile teeth minimizes the risk of accidental tooth extraction during impression removal. REFERENCE 1. Heartwell CM Jr, Rahn AO. Syllabus of complete Philadelphia: Lea & Febiger, 198&460-568.
dentures.
4th ed.
Reprint requests to: DR. GARY GOLDSTEIN DIVISION OF RESTORATIVE KIUSER DENTAL CENTER 345 EAST 24TH ST. NEW YORK, NY 10010
AND PROSTHODONTIC
SCIENCES
893
An alternative Gary
R. Goldstein,
immediate
complete
denture
impression
FROM
OUR READERS
technique
DDSa
Kriser Dental Center, New York University, New York, N.Y. Patients presenting for immediate denture therapy may have the remaining teeth., which are extremely mobile, extracted by routine impression procedures. The purpose of this article is to present an impression technique that can prevent extraction of these teeth (Fig. 1). Before taking impressions of mobile teeth, the following regions are blocked out with wax or clay. 1. Embrasures of teeth with closed contact points
BProfessor,Division of Restorative and Prosthodontic Sciences, Director of Prosthodontic Research. 10/4/36284
1. Condition of the teeth before impressions were made. Fixed partial denture with class III + mobility.
Fig.
2. Fixed partial denture pontics that do not make tissue contact 3. Undercuts on remaining teeth PRELIMINARY
IMPRESSION
An irreversible hydrocolloid impression is made in a disposable stock acrylic resin tray. The borders of the tray are corrected with modeling compound or baseplate wax (Fig. 2). Holes, which are large enough to accommodate the end of an amalgam condenser, are prepared through the tray directly over the incisal or occlusal surfaces of the questionable teeth. When the impression is ready to be removed from the oral cavity, the assistant places the amalgam con-
3. Irreversible hydrocolloid preliminary impression about to be removed from oral cavity. The amalgam condensers are being pushed apically through previously prepared holes in the impression tray.
Fig.
4. Preliminary impression with the holes at the incisal edges of the mandibular left and right canines where the amalgam condensers were inserted.
Fig. Fig. WaX.
892
2. Stock tray border-molded
with pink baseplate
JUNE
1992
VOLUME
67
NUMBER
6
TIPS
FROM
OUR READERS
Fig. 5. Autopolymerizing acrylic resin tray. Undercut finger rests in the molar region also aid in retention of the irreversible hydrocolloid impression.
Fig. 7. Combined zinc oxideleugenol irreversible hydrocolloid impression. Amalgam condensers were again used in facilitating removal of the impression without extracting mobile fixed partial denture.
impression is replaced in the oral cavity. A large or extra large stock disposable acrylic resin impression tray is again prepared with holes over the mobile teeth to receive the amalgam condensers. The teeth are dried, undercuts are blocked out, and irreversible hydrocolloid is wiped over the teeth and into the mucolabial fold. The tray, filled with irreversible hydrocolloid, is then placed in the patient’s mouth over the first-stage impression. Removal, without extraction of any teeth, is facilitated by the use of the amalgam condensers (Fig. 7).
Fig. 6. Zinc oxide/eugenol impression in the oral cavity.
densers through the holes and pushes the teeth gingivally as the tray is removed (Figs. 3 and 4). SECONDARY
IMPRESSION
Where teeth have mobility, a two-piece impression is preferred.l A custom, acrylic resin impression tray is fabricated with undercuts in the finger rest areas to aid in the retention of the second-stage irreversible hydrocolloid impression (Fig. 5). The impression tray is border-molded and a zinc oxide/eugenol paste impression is made (Fig. 6). The impression is removed, the excessis trimmed away, and the
THE
JOURNAL
OF PROSTHETIC
DENTISTRY
SUMMARY An alternative immediate denture impression technique for extremely mobile teeth, utilizing amalgam condensers, has been presented. The apically applied pressure on the mobile teeth minimizes the risk of accidental tooth extraction during impression removal. REFERENCE 1. Heartwell CM Jr, Rahn AO. Syllabus of complete Philadelphia: Lea & Febiger, 198&460-568.
dentures.
4th ed.
Reprint requests to: DR. GARY GOLDSTEIN DIVISION OF RESTORATIVE KIUSER DENTAL CENTER 345 EAST 24TH ST. NEW YORK, NY 10010
AND PROSTHODONTIC
SCIENCES
893
