Why make a separate tray?

Separate trays are made to get a functional impression.

After the tooth is missing, before the tooth is inserted, it is necessary to make an oral impression through the finished oral tray. Because each patient's oral morphology, the remaining teeth in the oral cavity and the alveolar ridge are very different, the finished tray can not meet the individual dental arch and alveolar ridge of the patient.

Only by making an individualized tray outside the mouth to make a second impression can the accuracy of the impression be improved, that is to say, an accurate denture working model can meet the requirements of individualized and customized denture making for patients and ensure the restoration effect of dentures.

Individual tray is to take the first impression to make an individual tray suitable for the patient's oral situation, and then use the individual tray to hold the impression material and take the second impression. The second impression is more detailed, accurate and clear than the first impression, and the edge extension is moderate.

Requirements for making impressions

After missing teeth, the first step is to complete the patient's comprehensive oral examination before inserting teeth: making a precise and accurate impression is one of the key steps for the success of denture. For denture restoration, the basic requirement of impression technology is to clearly reflect the teeth, gingival sulcus and tissues related to restoration, such as gingival margin, alveolar ridge in edentulous area, adjacent teeth and opposite teeth.

Oral impression reflects the situation of oral soft and hard tissues related to restoration. The model material is poured into the prepared impression to obtain a model completely consistent with the shape of the oral cavity.

Generally, all kinds of dentures are made by preparing impressions, pouring models and then making them on the models. Therefore, whether the impression and model truly reflect the oral tissue is closely related to the accuracy of making the prosthesis. It can be said that the quality of impression and model is the first prerequisite for making excellent prosthesis.