Uses Of Impression Materials

Impression materials are used to produce a detailed replica of the teeth and the tissues of the oral cavity.

Uses of impression materials.

Agar is also known as a reversible hydrocolloidal impression material. Dental impression making is the process of creating a negative form of the teeth and oral tissues into which gypsum or other die materials can be processed to create working analogues. A dental impression is an imprint of teeth and or soft tissues formed with specific types of impression materials that is used in different area of dentistry including prosthodontics. This classification is based on the capability of the material to withdraw over the undercuts it has set.

It was not borrowed from another industry. Chemistry optional these materials have an ether group in the molecular structure. Development polyether impression material was developed in the late 1960s for use a s a dental impression material. It gives good detail reproduction than any other material.

Impression materials that is the materials used to get an idea about the shape of teeth and the alveolar ridges can be categorized as nonelastic and elastic materials. Contemporary dentistry generates new information every year and digital dentistry is becoming established and infl. From this replica or impression a model can be made that is used in the construction of full dentures partial dentures crowns bridges and inlays. These supporting structures include gingiva a lveolar bone or residual ridge hard and soft palate and frenums which are muscle attachments.

However it has been replaced by rubber based impression materials because of the costly armamentarium required. Impression trays are used to hold the impression material allowing the operator to place it into the patients mouth. Agar is an aqueous impression material used for recording maximum details. For example as in the production of dies for fixed restorations.

A correctly made dental impression will capture a part or all of a person s dentition and surrounding structures of oral cavity. Type ii higher fusing material used as an adaptation material which requires more viscous properties used for making primary impression of the soft tissues and then used a tray to support a thin layer of a second impression material such as znoe paste hydrocolloids or nonaqueous elastomers 45. In dentistry we take impressions of teeth and their supporting structur es. Types of impression trays.

General comments impression materials are used to make replicas models or casts of t eeth and other oral tissues. They may be perforated for better retention of the impression material. The impression material will set chemically or physically and then may be removed from the mouth for use extra orally.