No muss, no fuss irreversible hydrocolloid impressions

uss, rno fuss irreversible

0

Ronald J. Lambert, DDSa U.S. Army Dental Corps, Fort Sam Houston,

hydrocolloid

Tex.

During deployment to Southwest Asia in support of Operations Desert Shield and Desert Storm we were tasked to operate in a number of clinical settings ranging from fixed facilities to tents. Because of a shortage of mixing bowls and spatulas and in an effort to minimize cleanup time, an improvised technique using a plastic head rest cover to mix the impression material was devised. The method is practical, minimizes the mess associated with impression procedures, and provides for an adequate mixing of the irreversible hydrocolloid.

METHOD The simplified technique is as follows: 1. Measure the water and pour into a plastic cover.

%ieutenant 10/4/41826

Colonel,

PolyvinylI

U.S.

Army

Dental

siloxane

impressions

head rest

SUMMARY The above described technique provided a practical and adequate method to mix irreversible hydrocolloid impression material, decreasing clean-up time by decreasing the usual mess associated with impression procedures. Reprint requests to: LT. COL. RONALD J. LAMBERT ACADEMY OF HEALTH SCIENCES ATTN: HSHA-MD(LTC LAMBERT) FORT SAM HOUSTON, TX 78234-6100

Corps.

as a disclosing

G. Roger Troendle, MS, DDS,a and Karen The University of Texas Health Science Center

Add irreversible hydrocolloid impression material. Mix by kneading the impression material thoroughly in one corner of the head rest cover. Cut the corner of the head rest cover with a pair of scissors and squeeze the material into the impression tray. Make the irreversible hydrocolloid impression and discard the head rest cover.

B. Troendle, at San Antonio,

Disclosing media have been used to enhance the fit of cast restorations. A number of materials have been suggested to disclose discrepancies of fit between the casting and the prepared tooth. r, 2 This article describes a clinical technique for using Extrude low-viscosity type I polyvinyl siloxane impression material (Kerr Manufacturing Co., Romulus, Mich.) as disclosing medium. It has been shown that Extrude polyvinyl siloxene impression material has less film thickness than the maximum allowed for dental zinc phosphate cement in American National Standards Institute/American Dental Association specification No. 8., 1987.3,4

medium DDSb Tex. 4. Express a small quantity of Extrude polyvinyl siloxane without using a tip on the syringe (Fig. 1). 5. Mix the material with a small spatula. This saves using a mixing tip for such a small amount of material. 6. Place the material in the restoration and seat it in the

PROCEDURE 1. Remove the temporary restoration and excess temporary cement from the preparation. 2. Trial seat the restoration on the tooth preparation. 3. Examine the interproximal contacts to ensure that the casting is not being held up by tight contacts. When contacts are adjusted, remove the restoration.

%linical tistry. bAssociate 10/4/41166

THE

Associate Professor,

JOURNAL

Professor, Department

OF PROSTHETIC

Department

of Restorative

of Restorative

DENTISTRY

Dentistry.

Den-

Fig. 1. A small quantity of Extrude impression material dispensed from syringe without a tip onto a mixing pad ready for mixing.

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