2/29/2024 0 Comments Dental impression rubber![]() The tissues are not displaced during impression taking, hence the material is termed mucostatic. Plaster of Paris is traditionally used as a casting material once the impression has been taken, however its use as an impression material is occasionally useful in edentate patients. Rigid Plaster of Paris (impression plaster) Impression materials can be considered as follows: Inserting a retraction cord into the gingival crevice is one method of retracting gingival tissues away from the tooth. As a result, the gingival tissues must be pushed away from the preparation margin in order for the impression material to be accessible. The preparation border must be accurately captured by the light bodied impression material when taking impressions for crown and bridge work. Impression for provision of fixed prosthesis
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