The three classifications of impressions in dentistry are:

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The three classifications of impressions in dentistry are preliminary, final, and occlusal or bite registration. Preliminary impressions are taken to create a replica of the teeth and surrounding tissues to make a custom tray or determine the impression technique for the next step. Final impressions capture the detailed and accurate representation of the teeth for the creation of restorations or prosthetics. Occlusal or bite registration impression records the way the teeth come together using a material that can be later used to create a bite record or articulation of the patient's jaw movement.

The Three Classifications of Impressions in Dentistry Are