Embedded guide plate for precise positioning of root canals and its preparation method, preparation system, application, method for precise positioning of root canals

Abstract

The invention discloses a preparation method of an embedded guide plate for precise positioning of embedded root canals, which simulates the scene of precise matching of surgical instruments and target root canals in target teeth by constructing corresponding three-dimensional models, so as to obtain the preoperative Plan the path, and then obtain the relevant parameters of the embedded guide plate for precise positioning of the target root canal according to the preoperative planning path, and then prepare the embedded guide plate according to the relevant parameters, which can be used for the target of each residual root / crown state The personalized embedded guide plate for tooth preparation ensures the precise positioning of the target root canal in each target tooth, which significantly shortens the time for clinical root canal search (especially for variant root canals), and reduces the risk of side penetration and bottom canal Wear and other risks, improve the success rate of surgery, thus effectively retaining the affected teeth. Correspondingly, the present invention also provides a root canal precise positioning guide plate, its preparation system, application, and a root canal precise positioning method.

Description

technical field [0001] The invention relates to the technical field, relates to oral auxiliary medical devices, and in particular relates to an embedded guide plate for precise root canal positioning in root canal therapy and its preparation method, preparation system, application, and root canal precise positioning method. Background technique [0002] Endodontic disease and periapical disease are common and frequently-occurring diseases in oral clinical work. Currently, the most effective treatment method is root canal therapy. The principle of root canal therapy is to thoroughly clean, shape, and disinfect the complex root canal system of the tooth, and then use the filling material for strict root canal filling, thereby preventing the recurrence of infection. Successful root canal treatment requires a comprehensive understanding of the root canal system, without missing any root canal, thorough cleaning of the root canal, proper shaping, and tight three-dimensional filli...

AI Technical Summary

Problems solved by technology

[0004] However, the CBCT three-dimensional image before root canal surgery is only a display of the root canal system, which is helpful for physicians to understand the root canal system, but it cannot provide intraoperative navigation and guidance for the operator. That is to say, the current root canal treatment Still relying on the operator's deep understanding of the root canal system of the target tooth to be treated, and then combining the microscope to use "free hands" to perform root canal treatment, there are the following two problems:

[0006] 2) Root canals may still be missed under the microscope, especially when the root canal changes, that is, the position of the root canal opening and / or the axial direction of the root canal changes, it is more difficult for the "free hand" to accurately find the changed root canal s position

However, since this guide plate is directly covered on the surface of the crown to determine the pulp opening point, it is only suitable for target teeth with intact crowns / sound crowns, not for target teeth with residual crowns / roots, and This kind of guide plate will have the following problems in practical application:

[0008] 1) Since the guide plate directly covers the surface of the crown, no matter in the process of opening the pulp or cleaning the root canal, the guide plate may shift or even break away from the crown, especially in the process of cleaning the root canal. It is constantly pulled up and down, which is more likely to cause the guide plate to shift or fall off

If the guide plate is detached or displaced, the guide hole will deviate from the root canal mouth, that is to say, the stability of this full-coverage guide plate is poor, which may lead to inaccurate positioning during root canal treatment;

[0009] 2) The full-coverage guide plate is only suitable for the anterior teeth on both sides of the maxillofacial midline, such as the incisors, and is not suitable for the posterior teeth

Since the full-coverage guide plate covers the surface of the crown, correspondingly, its internal guide hole is also located outside the target tooth, so there is no guidance between the guide hole of the guide plate and the root canal orifice, that is to say, the full-coverage guide plate The guide plate can only determine the position of the root canal opening, that is, the needle insertion point, but it cannot guide the surgical instrument into the root canal according to the ideal path, that is, it cannot uniquely determine the needle insertion direction of the surgical instrument, especially when the axial direction of the root canal occurs. When changing, that is to say, the full-coverage guide plate cannot guide the whole process, so it cannot ensure that the surgical instrument reaches the ideal position

[0011] 4) As we all know, surgical instruments are soft and easy to bend once they are resisted. Therefore, in the absence of any guidance in the medullary cavity, even if the surgical instrument enters the medullary cavity through the guide hole, it may be affected by other tissues in the medullary cavity. Bending due to resistance, so that the optimal position cannot be reached, resulting in iatrogenic injuries such as side penetration or bottom penetration

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