Embedded guide plate for precise positioning of root canal, preparation method and system of embedded guide plate, application and precise positioning method of root canal

Abstract

The invention discloses a preparation method of an embedded guide plate for precise positioning of an embedded root canal. The preparation method comprises the steps that by constructing a corresponding three-dimensional model, a scene of precise matching of a surgical instrument with a target root canal in a target tooth is simulated so as to obtain a preoperative planning path of the surgical instrument; then relevant parameters of the embedded guide plate for precise positioning of the target root canal are obtained according to the preoperative planning path; and then the embedded guide plate is prepared according to the relevant parameters. The personalized embedded guide plates can be prepared for each target tooth in a residual root / residual crown state so as to ensure the precise positioning of the target root canal in each target tooth, the clinical time for finding the root canal (especially a mutated root canal) is significantly shortened, the risks such as side penetrationand bottom penetration are reduced, the success rate of the operation is increased, and thus the affected teeth are effectively retained. Correspondingly, the invention further provides the guide plate for precise positioning of the root canal, a preparation system of the guide plate, application and a precise positioning method for the root canal.

Description

technical field [0001] The invention relates to the technical field, and relates to an oral auxiliary medical device, in particular to an embedded guide plate for precise positioning of root canals in root canal treatment, a preparation method, a preparation system, an application thereof, and a method for precise positioning of root canals. Background technique [0002] Pulp disease and periapical disease are common and frequently-occurring diseases in oral clinical work. At present, the most effective treatment method is root canal treatment. The principle of root canal treatment is to thoroughly clean, shape, disinfect the complex root canal system of the tooth, and fill the root canal tightly with filling materials to prevent recurrence of infection. Successful root canal treatment requires a comprehensive understanding of the root canal system, without missing any root canals, thorough cleaning of the root canals, proper shaping, and tight three-dimensional filling. Th...

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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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