Construction of dental study models.

摘要

There are several recommended methods for the construction of orthodontic gypsum models in the human dental literature. All methods have the objective to standardize the technique and produce a perfect reproduction of the dental and soft tissue structures of the oral cavity. The gypsum dental models provide valuable information that register and archive a representation of the oral cavity in clinical cases. They assist in the analysis and study of animal occlusion, malpositioned teeth, jaw characteristics, discrepancies of dental size, and osseous bases. Dental models are used as a basis for diagnosis and treatment planning. Dental models are also valuable in communicating oral and dental diseases with pet owners and veterinary dental colleagues. Finally, pre- and post-treatment models can be used to assess the efficacy of treatment. Materials and equipment required for the construction of dental models include: adjustable or custom-made mold trays, alginate, plaster or stone gypsum, bowls, spatulas, gypsum knife, vibrator, sheets of red wax, cutting model machine, ruler, extra fine sandpaper (400 or 500 grit), polish solution, a polish machine with felt disc, or panty hose silk. The mold (negative or impression) is obtained by moulding the oral cavity with alginate impression material and the model (positive) is obtained by filling the mold with gypsum. The model is then cut and polished to improve its final appearance. Human methods were adapted for animal patients and the complete sequence of dental study model construction is described step-by-step.