Get ready
1. According to the number of missing teeth. Place? Relationship and abutment morphology, tissue structure and periodontal supporting tissue to select abutment teeth and determine the number of abutments.
2. Check whether the extraction wound in the missing tooth area is healed, the size of the missing tooth gap, the alveolar ridge and the oral mucosa.
3. The crown of the abutment tooth should be tall and the root should be large, if there is a tooth body or periodontal disease, it needs to be treated first, and the pulp tooth should be treated with a perfect root canal.
4. The occlusal relationship should be basically normal, and if the abutment teeth are tilted and displaced, elongated to the jaw teeth, twisted or misaligned, they must be ground or change the design method of the retention body.
Method
1. Tooth preparation of abutment: When preparing the tooth body according to the type of retention body with reference to tooth defect repair, the corresponding axial surfaces of all abutment teeth are required to be parallel to each other, without concave or slightly directional. Square or cut end polymerization 2o-5o to obtain a common position channel of each retainer, and attention should be paid to enhancing the retention force of the retainer.
2. Impression and mold: The impression must be accurate, complete and clear. For casting fixed bridges and metal porcelain bridges, the whole tooth printing mold is taken by double-layer silicone rubber impression method, the mold is filled with anhydrite, and then the removable model is formed with a substitute needle.
3. Fixed bridge production: generally completed in the laboratory room.
4. Fixed teeth trial: the preliminarily polished retention body is tested on each abutment tooth, and the retention body is required to be correct and also close to the neck of the abutment tooth, the edge is properly extended, the adjacency relationship is good, the occlusal is coordinated, no warping, and the retention is good, if there is a problem and treated accordingly, it can be polished and glued. The metal porcelain bridge is tried on before glazing, and after contouring and biting, it is glazed and glued.
5. Doctor's advice: instruct the patient to fast within 2 hours after sticking, chew hard food without a fixed bridge within 24 hours, and make an appointment for a re-examination if necessary.