Tooth neck shoulder preparation method in tooth full-crown repair process and special bur therefor

Abstract

The invention relates to the technical field of tooth restoration, in particular to a tooth neck shoulder preparation method in the tooth full-crown repair process and a special bur therefor. According to the technical scheme, the method comprises the following preparation steps that S1, a used bur is subjected to surface disinfection by soaking for 20-30 min, the texture part of the bur is cleaned for 1-5 times with a toothbrush with a small head after soaking, and finally the bur is washed with clear water; S2, the used bur is placed in a high-low speed handpiece used by a doctor, and installed, and then the bur waits for use; and S3, if the neck of the tongue side or the adjacent face takes metal as the crown edge, the neck edge can be prepared into a feather shape, a groove shape or a right-angle inclined plane shape, and if the lip-cheek side or the full crown edge is porcelain, the tooth neck edge should be prepared into a right angle or a 135-degree concave surface. According to the invention, the strength and the beauty of the neck edge porcelain can be ensured, the accuracy and the suitability of the edge of the restoration body are also improved, and the advantages of small gingival irritation of the upper gingival edge and the beauty of the lower gingival edge are also integrated.

Description

technical field [0001] The invention relates to the technical field of tooth restoration, in particular to a tooth neck shoulder preparation method and a special-purpose bur in the tooth full crown restoration process. Background technique [0002] The basic content of dental prosthodontics is: firstly, prepare teeth according to the principles of retention, resistance and protection of pulp-dentine organs; finally, use specific materials to restore their inherent shape and function through certain procedures. Therefore, in the process of tooth restoration, from design to preparation, each specific step and operation must take into account the preservation of tooth tissue. According to the condition of the tooth defect, a cavity of a certain shape is prepared on the affected tooth, a restoration that can be embedded in the cavity is made outside the mouth, and it is adhered in the cavity with cement, that is, the anatomical shape and shape of the tooth are restored. Physiol...

AI Technical Summary

Problems solved by technology

This is because the commonly used burs used for tooth edge preparation do not accurately quantify the cut tooth tissue, and the grinding depth of the tooth edge depends on the doctor's naked eye observation, resulting in a large error in the amount of tooth edge preparation ;And for the sake of aesthetics, the edge of the full crown is often placed under the gums. Due to the occlusion of the gums, the edge of the tooth to be prepared is not within the doctor's field of vision. The doctor can only estimate the grinding thickness based on clinical experience , which increases the error of tooth margin preparation, leading to a large number of unqualified margin preparation cases in clinical practice, and it is easy to injure the gums, further damage the periodontal tissue, and seriously affect the health and appearance of patients

", but when installing the bur, it is not convenient to disassemble and install, and the installation operation is not stable. It may damage the patient's gums and teeth during rotation, resulting in secondary injuries.

[0005] However, if the preparation is insufficient in the restoration of the full crown of the tooth, either the porcelain layer of the neck is too thin, the metallic color or transparency decreases, and the strength of the crown edge decreases; The neck of the tooth is inconsistent and the neck of the crown develops a swollen appearance

Too much preparation may cause pulp damage

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