Trouble-shooting dual arch impressions
Article Abstract:
Dual arch impression techniques can save time and materials but require meticulous technique in comparison with other methods for taking impressions of the teeth during dental work. Dual arch trays come in various types, including plastic and metal, and enclose different amounts of the arch. Correct selection and insertion of the tray are crucial to taking an accurate impression of the teeth and where they meet. Different techniques involve inserting the arch tray and then injecting viscous impression material around the tooth being worked on while the patient bites down. Before the procedure, dentists may need to show patients how to bite all the way down without changing the alignment of their bite. A water-soluble lubricant placed on the impression material or a local anesthetic applied to nearby oral structures may help the patient bite down completely.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1996
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Trouble-shooting dual arch impressions, part 2
Article Abstract:
Several precautions taken before performing a dual arch impression can improve the success of the procedure. A dual arch impression provides an accurate full upper and lower bite-down template mold for the region of interest before applying a crown. Impression trays should be individually chosen to precisely fit the patient's mouth and allow the patient to bite down completely. Tray composition should be matched with a complementary impression material. The targeted tooth should be molded completely with one impression material to ensure an accurate fit. Dentists should carefully evaluate the crown before and after fitting.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1997
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Isolation with a dual-arch impression tray
Article Abstract:
A custom acrylic dental impression tray may be modified to maintain a dry operative field while cementing a dental prosthesis. A dentist can cut a window into the impression tray, after it is used to form the prosthesis, in order to access the area of restoration. The dentist can then work through the window to cement the prosthesis, while the tray prevents saliva from contaminating the field.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1998
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