Preparation and application of educational model for microscopic periapical surgery

Objective To design a suitable microscopic periapical surgery related teaching mould to meet the need of dental laboratory education and solve related problem existed in research and clinical work. Methods The exsomatized teeth after root canal therapy were put on the alveolar of cavity block. The heated red wax was crumpled a small ball with a 0.5 cm diameter, and then were placed at the top of the teeth root and tightly compressed. The screw and sheet iron of the cavity block were tightly screwed down, The superhard plaster was clockwise stirred in water, and then was filled into cavity block and covered it with a lid that was pressed using a 2.5 kg object for 20 min. Subsequently, the screw of cavity block was turned off, and the dry superhard plasterwas put it into head-simulators for use. A questionnaire investigation was carried out among 24 microscopic periapical surgery operator trainees. Results The plaster teeth mould can be used in head-simulator directly, and imitated the range and the size of apical cyst and the treatment procedure of microscopic periapical surgery. In this questionnaire, 100% respondents believed that the head-simulator training course with improved plaster teeth mould is much close to clinical operation, while 87.5% trainees suggested more learning equipments of microscopic periapical surgery with further improvement are expected. Conclusions Microscopic periapical surgery is an extend technique of endodontic treatment commonly used in clinic. This educational model can be used in head-simulators and benefit to the experiment teaching of microscopic periapical surgery in different tooth. Key words: Periapical surgery, microscopic; Oral teaching simulation head model; Teaching, experiment