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Experimental purpose of making impression of upper and lower dentition
The purpose of this experiment is as follows:

1, according to today's headline official information, in order to obtain accurate three-dimensional information of patients' oral cavity, it is convenient for the design and operation of treatment schemes such as oral restoration, orthodontics or maxillofacial surgery.

2. The impression of upper and lower dentition can provide accurate oral structure information, including tooth type, shape and subtle spatial relationship, and provide reliable and effective reference for the formulation, design and operation of subsequent diagnosis and treatment programs.

3. It can be used to detect whether the connection between teeth is reasonable, whether there is permanent tooth caries, falling off, dislocation, poor contact, etc., thus playing a positive role in the prevention, treatment and maintenance of oral diseases.