Uses Of Different Impression Materials

Pvs offer advantages of improved hydrophilic nature and thus better flow precision and accurate detailing kumar and vijayalakshmi 2006.

Uses of different impression materials.

Figure 11 1 impression material classification elastic properties. Unique vps impression material uses an advanced temperature sensitive formulation howard e. T he mixed material is placed on the occlusal s urfaces of the mandibular arch. A dental impression is a negative imprint of hard teeth and soft tissues in the mouth from which a positive reproduction cast or model can be formed.

Also there is a wide range of dental impression materials like the following. The p atient bites into the material. Different types of impression materials are available. Technique accuracy taste ease of manipulation cost dimensional stability and the operator s preference will dictate the choice of impression materials figure 11 1.

A correctly made dental impression will capture a part or all of a person s dentition and surrounding structures of oral cavity. The differences between impression materials as outlined above are the materials themselves and the purpose they are used for. There are various impression techniques ranging from open mouth to close mouth methods. One of the most commonly used nanoimpression materials are polyvinylsiloxanes pvs.

The elastic impression materials must then be used but as most are actually viscoelastic materials see chapter 1 6 there is a possibility of some permanent deformation. Bite registration materials most elastome ric impression materials can be used as a bite registration material. 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. In the routine practice of restorative dentistry impression materials are one of the key materials that make our practices easier and more predictable than in the past.

Each of the materials has advantages and disadvantages but they are each used for a different purpose and are effective and commonly used products in dentistry today. Impression materials are selected because of their unique qualities that allow dentists to obtain the most accurate reproduction. It is made by placing an appropriate material in a stock or custom dental impression tray which is designed to roughly fit over the dental arches. An impression material is classified according to specific properties.

The two types of material are inelastic and elastic. Different types of impression materials are available which vary in their properties. Storage stability there is usually a significant delay between the taking of an impression and its arrival in the dental laboratory where the model is poured.