Abstract
The deposit around the root surface plays a major role in the etiology of the periodontal disease. Therefore the scaling and the root planing are indispensable for the treatment of this disease. For a training scheme of the beginner, we developed a model of a dental arch that had artificial calculus around the roots of the resin teeth. Powdered metal, made by filing of the cored solder, was cemented to the resin teeth by cyanoacrylic bonding agent (Aron alpha A “Sankyo”). The silicon impression material (Exaflex, GC Dental Mfg. Co.) was adopted as the artificial gingiva.
The model was attached to the mannequin with artificial cheeks and served for the training. The area of artificial calculus before and after the scaling was measured and the residual rate of the artificial calculus was calculated. The rate of roughness of the gingiva and of the root surfaces were also evaluated. Most of the operator who showed smaller residual rate had tendency to produce rougher gingiva. But a few showed the smallest residual rate with minor periodontal damage.
This model was useful for the training scheme.
