A kit of tools for full crown tooth preparation

Abstract

The application discloses a full crown tooth preparation auxiliary tool kit, which comprises a dental handpiece, a positioning reference assembly and a positioning needle. The dental handpiece comprises a dental handpiece body and a dental handpiece head mounted at one end of the dental handpiece body, and the dental handpiece head is provided with a lathe needle. The positioning reference assembly comprises a bite guide plate and an ideal preparation body model which are connected together through a connecting plate. The bite guide plate is fixedly sleeved with teeth in a target tooth area to be repaired, and the bite guide plate is provided with a hollow groove for exposing the target tooth area to be repaired. The positioning needle is fixedly assembled with the dental handpiece and is arranged in parallel with the lathe needle at an interval. The distance between the lathe needle and the positioning needle is equal to the distance between the ideal preparation body model and the corresponding point of the target tooth area to be repaired, and the lathe needle is parallel to the positioning needle. The full crown tooth preparation auxiliary tool kit can provide a reference for tooth preparation operation of a dentist, so that a more accurate tooth preparation amount can be obtained, and the tooth preparation quality is improved.

Description

Technical Field

[0001] This invention relates to the field of dental preparation technology, specifically to a kit of auxiliary tools for preparing full crown teeth. Background Technology

[0002] Tooth defects caused by dental caries, dental trauma, and abrasion are common and frequently occurring diseases in dentistry. In most cases, fillings can be used for treatment. However, when the tooth defect is severe and filling is difficult, or when higher aesthetic requirements are needed, restorative treatment is employed. Restorative treatment of tooth defects involves using artificial restorations to restore the shape and function of the damaged tooth. Commonly used restorations include full crowns, partial crowns, veneers, inlays, and post-core crowns. Full crowns can be further classified based on the materials used: cast metal full crowns, porcelain-fused-to-metal full crowns, and all-ceramic crowns. All-ceramic crowns offer excellent aesthetic performance, good biocompatibility, no metal toxicity or allergy issues, and avoid the interference of metal on certain imaging examinations, such as MRI, thus their clinical application is becoming increasingly widespread.

[0003] All-ceramic crowns can, in principle, be used to repair various crown defects, especially for anterior teeth with incisal edge or other defects requiring aesthetic restoration. To provide the necessary restorative space, remove undercuts, design the position and shape of the margins, and obtain good retention and resistance, tooth preparation must be strictly performed according to requirements before fabricating the crown.

[0004] The core elements of tooth preparation are quantity and shape. The main indicators for measuring these two elements include undercut, convergence, roughness, shoulder, and the amount of tooth preparation. The long axis of the tooth is the geometric axis that runs longitudinally through the tooth and passes through its center. In tooth observation and measurement, it is used to describe the characteristics and interrelationships of the tooth. With the continuous improvement of the mechanical properties of crown restorative materials, the concept of minimally invasive restorations is gaining increasing importance. Minimally invasive restorations mean that the space required for the restoration within the tooth is minimal, i.e., the amount of tooth preparation is gradually decreasing, and the clinical difficulty is gradually increasing. Furthermore, due to the limitations of the mechanical properties of ceramic materials, the requirements for both "quantity" and "shape" in tooth preparation for all-ceramic crown restorations are even higher.

[0005] Current tooth preparation techniques rely on dental handpieces as operating tools, allowing clinicians to manipulate the tooth manually based on their theoretical knowledge and experience. Even skilled clinicians struggle to guarantee precision and standardization. Novice clinicians, lacking extensive clinical experience, find it even more difficult to ensure quality in tooth preparation. Therefore, using only existing dental handpieces for tooth preparation introduces numerous uncontrollable factors, making it difficult to transform the target tooth (the tooth requiring preparation) into an ideal preparation body (a tooth that has already undergone preparation), thus compromising the quality of tooth preparation. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a full crown tooth preparation auxiliary tool kit to assist dentists in tooth preparation operations, thereby improving the quality of tooth preparation.

[0007] The present invention solves the above problems through the following technical means: A set of auxiliary tools for preparing full-crown teeth includes a dental handpiece, a positioning reference component, and a positioning pin. The dental handpiece includes a dental handpiece body and a dental handpiece head mounted on one end of the dental handpiece body. The dental handpiece head is provided with a bur. The positioning reference component includes an occlusal guide plate and an ideal preparation model connected together by a connecting plate. The occlusal guide plate is matched and fixedly sleeved with the tooth in the target tooth position area. The occlusal guide plate has a groove that exposes the target tooth position. The positioning pin is fixedly assembled with the dental handpiece and arranged parallel to the bur at intervals. The distance between the bur and the positioning pin is equal to the distance between the corresponding point of the ideal preparation model and the target tooth position. The bur and the positioning pin are parallel.

[0008] Furthermore, the positioning pin is fixedly assembled with the dental handpiece via a positioning component. The positioning component includes an upper positioning plate and a lower positioning plate. One end of the upper positioning plate is integrally provided with a reference sleeve that matches and fits with the head of the dental handpiece. The lower positioning plate and the end of the upper positioning plate away from the reference sleeve are joined together and fitted with the body of the dental handpiece. The positioning pin is welded and fixed to the lower positioning plate.

[0009] Furthermore, connecting lugs extend from both sides of the upper and lower positioning plates. These connecting lugs, when fitted together, are connected by a bolt assembly. The connecting lugs are provided with connecting holes for bolt assembly assembly. Alternatively, the upper and lower positioning plates can be connected by a snap-fit ​​mechanism, consisting of a snap-fit ​​body on the upper positioning plate and a snap-fit ​​seat on the lower positioning plate.

[0010] Furthermore, the positioning pin is a telescopic rod structure.

[0011] Furthermore, the dental handpiece is equipped with a light.

[0012] Furthermore, the ideal pre-built model is fabricated using 3D printing.

[0013] Furthermore, the ideal prepared model is obtained based on the optical scan digital model or image scan digital model of the patient's tooth before preparation.

[0014] Furthermore, the occlusal guide plate is provided with a first guide post parallel to the long axis of the tooth to be repaired.

[0015] Furthermore, the occlusal guide plate is provided with a second guide post parallel to the line connecting the target tooth position to be restored and the corresponding point of the ideal preparation model.

[0016] The beneficial effects of this invention are: The full crown tooth preparation auxiliary tool kit of the present invention utilizes the positioning reference of an ideal preparation model to provide a reference for dentists' tooth preparation operations, thereby obtaining a more accurate amount of tooth preparation and improving the quality of tooth preparation. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of a dental handpiece with a positioning pin. Figure 2 This is a schematic diagram of the positioning reference component structure; Figure 3 This is a schematic diagram of the positioning assembly structure for bolted connections; Figure 4 This is the main view of the positioning component for the bolt connection; Figure 5 This is a schematic diagram of the upper positioning plate structure; Figure 6 This is a schematic diagram of the lower positioning plate structure; Figure 7 This is a schematic diagram of the positioning component with snap-fit ​​connection; In the attached drawings: 101, dental handpiece body; 102, dental handpiece head; 103, bur; 104, illumination lamp; 2, positioning pin; 3, positioning reference assembly; 301, occlusal guide plate; 302, ideal preparatory model; 303, slot; 304, connecting plate; 305, first guide post; 306, second guide post; 4, positioning assembly; 5, upper positioning plate; 501, reference sleeve; 6, lower positioning plate; 601, illumination lamp hole; 7, bolt assembly; 8, connecting lug; 9, connecting hole; 10, snap fastener. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them.

[0020] like Figures 1-6As shown, this invention discloses a full-crown tooth preparation auxiliary tool kit, including a dental handpiece, a positioning reference component 3, and a positioning pin 2. The dental handpiece includes a dental handpiece body 101 and a dental handpiece head 102 installed at one end of the dental handpiece body. The dental handpiece head is provided with a bur 103. The positioning reference component 3 includes an occlusal guide 301 and an ideal preparation model 302 connected together by a connecting plate 304. The occlusal guide is matched and fixedly sleeved with the tooth in the target tooth position area. The occlusal guide has a groove 303 that exposes the target tooth position. The positioning pin is fixedly assembled with the dental handpiece and arranged parallel to the bur at intervals. The distance between the bur and the positioning pin is equal to the distance between the ideal preparation model and the corresponding point of the target tooth position. The bur and the positioning pin are parallel. The ideal preparation model is obtained based on the optical scan digital model or image scan digital model of the patient's tooth before preparation, and then the ideal preparation model is fabricated by 3D printing. The specific data calculation method of the ideal preparation model is prior art and will not be described in detail here.

[0021] When using the full-crown tooth preparation auxiliary tool kit of this application, the dentist holds the dental handpiece and places the bur on the target tooth to be restored. Simultaneously, the positioning pin is positioned at the corresponding point on the ideal preparation model. The positioning pin is moved along the outer surface of the ideal preparation model, and the bur is manipulated to prepare the tooth at the target tooth, transforming it into the shape of the ideal preparation model. This tooth preparation method, using an ideal preparation model as a reference, offers higher precision and achieves better tooth preparation quality compared to traditional manual manipulation by dentists.

[0022] In a preferred embodiment, the positioning pin is fixedly assembled with the dental handpiece via a positioning assembly 4. The positioning assembly includes an upper positioning plate 5 and a lower positioning plate 6. One end of the upper positioning plate is integrally provided with a reference sleeve 501 that matches and fits onto the head of the dental handpiece. The lower positioning plate and the end of the upper positioning plate away from the reference sleeve are joined together and fitted onto the body of the dental handpiece. The positioning pin is welded and fixed to the lower positioning plate. Connecting lugs 8 extend from both sides of the upper and lower positioning plates. The connecting lugs on the corresponding sides are connected by a bolt assembly 7 after being fitted together. The connecting lugs are provided with connecting holes 9 for bolt assembly.

[0023] In this embodiment, the reference sleeve of the upper positioning piece is designed as a cylindrical sleeve. After installation, the reference sleeve fits against the head of the dental handpiece, serving a positioning function. The end of the upper positioning piece furthest from the reference sleeve is designed as an upper semi-cylindrical sleeve, which fits against the upper part of the dental handpiece body after installation. The lower positioning piece is also designed as a lower semi-cylindrical sleeve, which fits against the lower part of the dental handpiece body. After the upper and lower positioning pieces are joined together, a bolt is passed through the connecting hole on the connecting lug to achieve a fixed connection. At this time, the positioning pin welded on the lower positioning piece is in the designed position, avoiding displacement of the positioning pin and affecting the tooth preparation effect. The method of using positioning components for connection also facilitates the disassembly and replacement of parts.

[0024] like Figure 7 As shown, in some other embodiments, the upper positioning piece and the lower positioning piece are connected by a snap fastener 10. The snap fastener consists of a snap fastener body disposed on the upper positioning piece and a snap fastener seat disposed on the lower positioning piece. The upper positioning piece and the lower positioning piece are closed together, and the snap fastener body and the snap fastener seat are fastened together, so as to realize the assembly of the positioning component and facilitate assembly and disassembly.

[0025] In a preferred embodiment, the positioning pin 2 is a telescopic rod structure. The telescopic rod structure consists of a hollow rod with another rod of smaller diameter fitted inside, and the two rods are positioned together by bolts. In use, the telescopic rod is stretched to the required length and then the bolts are tightened to fix the length. Different burs may need to be changed at different stages of tooth preparation; this application designs the positioning pin as a telescopic structure to accommodate length changes caused by different burs, avoiding the tedious operation of repeatedly disassembling and replacing parts.

[0026] In a preferred embodiment, the dental handpiece is equipped with a light 104. The light is used for illumination during tooth preparation, helping the dentist observe the teeth and improving the quality of preparation. The light can be located on the head or body of the dental handpiece, as long as it does not obstruct the dentist's view and serves an illumination purpose. In this embodiment, the light is located at the connection point between the head and body of the dental handpiece, on the same side as the bur, facilitating the dentist's observation of the teeth. Simultaneously, a corresponding light hole 601 is designed on the lower positioning plate to prevent obstruction of the light.

[0027] In a preferred embodiment, the occlusal guide 301 is provided with a first guide post 305 parallel to the long axis of the tooth to be restored; the occlusal guide is also provided with a second guide post 306 parallel to the line connecting the corresponding points of the target tooth to be restored and the ideal prepared model. When using the full crown tooth preparation auxiliary tool kit of this application, the bur can be made parallel to the first guide post by visual observation, and the dental handpiece body can be made parallel to the second guide post at the same time, reducing tooth preparation deviation and improving tooth preparation quality.

[0028] In summary, the full crown tooth preparation auxiliary tool kit of this embodiment can provide a reference for dentists' tooth preparation operations, so as to obtain more accurate tooth preparation amount and improve tooth preparation quality.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A set of auxiliary tools for preparing full crown teeth, characterized in that: The device includes a dental handpiece, a positioning reference assembly (3), and a positioning pin (2). The dental handpiece includes a dental handpiece body (101) and a dental handpiece head (102) mounted on one end of the dental handpiece body. The dental handpiece head is provided with a bur (103). The positioning reference assembly (3) includes an occlusal guide (301) and an ideal preparation model (302) connected together by a connecting plate (304). The occlusal guide is matched and fixedly sleeved with the tooth in the target tooth position area. The occlusal guide has a setting for the target tooth to be restored. The cavity (303) is exposed at the tooth position to be restored; the positioning pin is fixedly assembled with the dental handpiece and arranged in parallel with the bur at intervals, the distance between the bur and the positioning pin is equal to the distance between the corresponding point of the ideal preparation model and the target tooth position to be restored, and the bur and the positioning pin are parallel; the occlusal guide (301) is provided with a first guide post (305) parallel to the long axis of the tooth body of the target tooth position to be restored; the occlusal guide (301) is provided with a second guide post (306) parallel to the line connecting the corresponding point of the target tooth position to be restored and the ideal preparation model.

2. The full crown tooth preparation auxiliary tool kit according to claim 1, characterized in that: The positioning pin is fixedly assembled with the dental handpiece via the positioning component (4). The positioning component includes an upper positioning piece (5) and a lower positioning piece (6). One end of the upper positioning piece is integrally provided with a reference sleeve (501) that matches and fits with the head of the dental handpiece. The lower positioning piece and the end of the upper positioning piece away from the reference sleeve are joined together and fitted with the body of the dental handpiece. The positioning pin is welded and fixed to the lower positioning piece.

3. The full crown tooth preparation auxiliary tool kit according to claim 2, characterized in that: Both sides of the upper and lower positioning plates extend into connecting lugs (8). The connecting lugs on the corresponding sides are fitted together and connected by bolt assemblies (7). The connecting lugs are provided with connecting holes (9) for bolt assembly.

4. The full crown tooth preparation auxiliary tool kit according to claim 2, characterized in that: The upper positioning piece (5) and the lower positioning piece (6) are connected by a buckle (10), which consists of a buckle body disposed on the upper positioning piece (5) and a buckle seat disposed on the lower positioning piece (6).

5. The full crown tooth preparation auxiliary tool kit according to claim 1, characterized in that: The positioning pin (2) is a telescopic rod structure.

6. The full crown tooth preparation auxiliary tool kit according to claim 1, characterized in that: The dental handpiece is equipped with a light (104).

7. The full crown tooth preparation auxiliary tool kit according to claim 1, characterized in that: The ideal pre-built model (302) was fabricated by 3D printing.

8. The full crown tooth preparation auxiliary tool kit according to claim 1, characterized in that: The ideal prepared model (302) is obtained based on the optical scan digital model or image scan digital model of the patient's tooth before preparation.

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