Dental impression | 合法醫療器材資訊網

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. 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. Impression material is of liquid or semi-solid nature when first mixed and placed in the mouth. It then sets to become an elastic solid (usually takes a few minutes depending upon the material), leaving an imprint of persons dentition and surrounding structures of oral cavity.

Impressions, and the study models, are used in several areas of dentistry including:

The required type of material for taking an impression and...