Preparation guide plate capable of positioning occlusal support concave part, related bur and manufacturing method of preparation guide plate

Abstract

The invention discloses a preparation guide plate capable of positioning an occlusal support concave part, a related bur and a manufacturing method of the preparation guide plate. The part, corresponding to a to-be-ground area of an adjacent tooth, of an adjacent tooth covering structure of the preparation guide plate is of an opening structure, the opening structure corresponding to the to-be-ground area of the adjacent tooth is close to an odontia area covering structure, and a guide plane is formed between the opening structure corresponding to the to-be-ground area of the adjacent tooth and the adjacent tooth covering structure; the guide plane is arranged along the direction of a false tooth in-position path; the part, corresponding to the occlusal support concave part, of the adjacent tooth covering structure is of an opening structure, and the edge of the opening structure corresponding to the occlusal support concave part extends in the long axis direction of adjacent teeth to form an occlusal support concave part positioning guide rail; and meanwhile, a bur inlet is formed in the side wall of the occlusal bracket concave positioning guide rail. According to the invention, the preparation of the occlusal support recess is kept consistent with that of the occlusal support recess designed on a digital model in advance, and the manufacturing of the removable partial denture stent is completed at the same time. The method has the advantages of simple clinical operation, high precision and reduction of the number of doctor seeing times of the patient.

Description

Technical Field

[0001] This invention patent belongs to the field of oral digital technology, and relates to a preparation guide plate for occlusal rest seats that can be positioned, related burs, and their manufacturing methods. Background Art

[0002] In the field of oral medicine, dentition defect is one of the most common oral diseases. Usually, fixed bridges, removable partial dentures, or implant dentures are used for restoration. Since fixed bridge dentures require a large amount of healthy tooth tissue to be ground away, the acceptance rate of patients is relatively low. Removable partial dentures are widely used because of their low cost, minimally invasive nature, and wide range of indications. However, due to their structural characteristics, it is necessary to design and prepare occlusal rest seats (in this article, "occlusal" represents a Chinese character, pronounced "hé") and guiding planes on the remaining natural teeth. The occlusal rest seat is the placement position of the occlusal rest structure of the removable partial denture on the abutment tooth (or adjacent tooth), which bears and transmits the occlusal force.

[0003] Clinically, usually before making the working model of the dentition, doctors need to prepare the occlusal rest seats in the patient's mouth. The depth of the occlusal rest seat is generally about 1.5 mm, and the standard shape is hemispherical. However, due to the limited vision and operation errors in manual preparation, few doctors can prepare a standard occlusal rest seat, which results in a non-standard shape of the occlusal rest of the removable partial denture. If it is made according to the standard shape and thickness, it will be difficult to be seated and the occlusion will be too high. Clinical doctors need a lot of time for grinding, and the ground occlusal rest cannot reach the clinical standard in terms of both shape and thickness, resulting in limited use of the removable denture. Summary of the Invention

[0004] In view of the defects or deficiencies of the prior art, the present invention provides a preparation guide plate for occlusal rest seats that can be positioned.

[0005] To this end, the preparation guide plate for occlusal rest seats provided by the present invention includes an edentulous area covering structure and an adjacent tooth covering structure. The part of the adjacent tooth covering structure corresponding to the area to be ground on the adjacent tooth is an opening structure. At the same time, the opening structure corresponding to the area to be ground on the adjacent tooth is close to the edentulous area covering structure, and a guiding plane is formed between the opening structure corresponding to the area to be ground on the adjacent tooth and the adjacent tooth covering structure. The guiding plane is arranged along the direction of the denture insertion path.

[0006] The part of the adjacent tooth covering structure corresponding to the occlusal rest seat is an opening structure, and the edge of the opening structure corresponding to the occlusal rest seat extends along the long axis direction of the adjacent tooth to form an occlusal rest seat positioning guide rail. At the same time, a bur inlet is provided on the side wall of the occlusal rest seat positioning guide rail.

[0007] An optional solution is that the opening structure corresponding to the occlusal support recess is close to the covering structure of the edentulous area, and the opening structure corresponding to the occlusal support recess and the opening structure corresponding to the area to be removed of the adjacent teeth intersect, so that the guide plane passes through the side wall of the occlusal support recess positioning guide rail to form an opening on the side wall of the occlusal support recess positioning guide rail, and the opening is the entry port for the turning needle.

[0008] An optional solution is that the thickness of the preparation guide plate body is 1.5-1.7 mm, and the edge of the opening structure corresponding to the occlusal rest recess extends 2.9-3.1 mm along the long axis direction of the adjacent tooth to form an occlusal rest recess positioning guide.

[0009] An optional solution is that the inner wall of the occlusal support recess positioning guide rail is provided with a plurality of protrusion structures, and the plurality of protrusion structures are distributed on the inner walls on both sides opposite to each other in the occlusal support recess positioning guide rail.

[0010] The present invention also provides a method for constructing the above-mentioned preparatory guide plate model, and the provided construction method comprises the following steps:

[0011] (1) determining the adjacent teeth to be removed area and the occlusal support recess on the edentulous data model; generating the preparation guide body data on the edentulous model, the preparation guide body data including the edentulous area coverage structure data and the adjacent teeth coverage structure data;

[0012] (2) removing the structural data of the occlusal support recess covering the data of the preparation guide body, forming an opening structure corresponding to the occlusal support recess, and then extending the edge of the opening structure along the long axis of the adjacent tooth to form the occlusal support recess positioning guide rail data, and forming an opening for the needle in the side wall of the occlusal support recess positioning guide rail data;

[0013] The structural data covering the area to be removed of the adjacent teeth are cut out on the prepared guide plate body data, and the cutting direction is along the direction of the denture placement path, thereby forming a guide plane on the adjacent teeth covering structural data.

[0014] In some other embodiments, the method for constructing the preparatory guide plate model comprises the following steps:

[0015] (1) determining the adjacent teeth to be removed and generating the occlusal support recess on the edentulous model; generating the preparation guide plate body data on the edentulous model, wherein the preparation guide plate body data includes the edentulous area coverage structure data and the adjacent teeth coverage structure data;

[0016] (2) removing the structural data of the occlusal rest recess covering the data of the preparation guide body, forming an opening structure corresponding to the occlusal rest recess, and then extending the edge of the opening structure along the long axis direction of the adjacent tooth to form the occlusal rest recess positioning guide rail data;

[0017] Then, the structural data covering the area to be ground of the adjacent teeth and part of the data of the occlusal support recess positioning guide rail are cut away along the direction of the denture placement path, thereby forming a guide plane on the adjacent tooth covering data and the occlusal support recess positioning guide rail data, and the local data of the occlusal support recess positioning guide rail is cut away to form a needle entry port.

[0018] At the same time, the present invention also provides a method for manufacturing the above-mentioned preliminary guide plate, including using the above-mentioned method to model and then using a 3D printing method to process the preliminary guide plate.

[0019] In addition, the present invention also provides a turning needle for processing the above-mentioned preparation guide plate, comprising a turning needle body, one axial end of the turning needle body is an occlusal support concave grinding head, and the occlusal support concave grinding head is hemispherical in shape; a limiting structure is provided on the turning needle body, and the portion of the limiting structure axially close to the support concave grinding head is adapted to the occlusal support concave positioning guide rail. Optionally, the limiting structure is in an inverted cone shape, and the pointed end of the inverted cone faces the support concave grinding head.

[0020] The present invention solves the problem in the prior art that the shape of the prepared occlusal rest recess is non-standard and inconsistent with the clinical standard due to the limited operating field of the doctor and technical deviation during the preparation of the occlusal rest recess, which affects the long-term use of the denture, affects the transmission of the occlusal force, and affects the periodontal health of the remaining natural teeth.

[0021] The present invention uses digital technology to keep the preparation of the occlusal rest recess consistent with the occlusal rest recess designed in advance on the digital model, and completes the production of the removable partial denture bracket at the same time. It has the advantages of simple clinical operation, high accuracy and reduced number of patient visits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention provides a schematic structural diagram of the guide plate.

[0023] Figure 2 A top view of the structure of the guide plate is provided for the present invention.

[0024] Figure 3 This is a digital maxillary dentition defect model in an embodiment of the present invention, wherein an occlusal rest recess is to be prepared on tooth 17.

[0025] Figure 4 For Figure 3 The mesial occlusal surface of tooth 17 on the model was used to complete the standard preparation of the occlusal rest recess.

[0026] Figure 5 This is a generation diagram of the preparation guide plate in the embodiment of the present invention.

[0027] Figure 6 This is a rough unpolished image of a preliminary guide plate prepared in an embodiment of the present invention.

[0028] Figure 7 This is a diagram of a preparation guide plate placed on a dental model in an embodiment of the present invention.

[0029] Figure 8 Schematic diagram of the structure of the needle in the embodiment of the present invention.

[0030] Fig. 9 Schematic diagram of the use status of the preparation guide plate in the embodiment of the present invention.

[0031] Fig.10 It is a dental arch model in which the support recess processing is completed in the dental arch model in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] Unless otherwise specified, the scientific and technical data herein are based on the understanding of ordinary technicians in the relevant fields.

[0033] The determination of the adjacent tooth area to be removed (the clinical function is to position the denture for wearing) and the occlusal support recess described in this article follows the rules in the field of oral medicine. According to relevant clinical knowledge, the adjacent tooth area to be removed and the occlusal support recess are generally set on the same adjacent tooth. According to the actual situation of the patient, the adjacent tooth area to be removed and the occlusal support recess are both close to the edentulous area and the two partially overlap, or the adjacent tooth area to be removed and the occlusal support recess are distributed in different parts of the same adjacent tooth, and the adjacent tooth area to be removed is close to the edentulous area, while the occlusal support recess is set at other parts of the adjacent tooth, and there is no overlapping area between the two.

[0034] See also Figure 1 As shown, the preparation guide plate capable of locating the occlusal support recess of the present invention comprises a preparation guide plate body that can be worn at the tooth base or model 8 of the dentition defect, the preparation guide plate body comprises an edentulous area covering structure 1 and an adjacent tooth covering structure 2, wherein the portion of the adjacent tooth covering structure corresponding to the adjacent tooth to-be-removed area is an opening structure so that the adjacent tooth to-be-removed area is exposed, which is in line with clinical common sense, the opening structure corresponding to the adjacent tooth to-be-removed area is close to the edentulous area covering structure 1, and a guide plane 3 is formed between the opening structure corresponding to the adjacent tooth to-be-removed area and the adjacent tooth covering structure, and the guide plane is arranged along the denture placement direction to locate the denture wearing;

[0035] In addition, the portion of the adjacent tooth covering structure corresponding to the occlusal support recess is an open structure, and the edge of the open structure corresponding to the occlusal support recess extends along the long axis direction of the adjacent tooth to form a cylindrical occlusal support recess positioning guide rail 4, and the side wall of the occlusal support recess positioning guide rail is provided with a turning needle entry port 5. When in use, after the preparation guide plate is sleeved on the patient's edentulous area, the grinding area on the adjacent tooth is removed by grinding along the guide plane; the turning needle 7 for processing the occlusal support recess is ground from the turning needle entry port, gradually enters the occlusal support recess positioning guide rail 4, and under the constraint of the occlusal support recess positioning guide rail 4 (i.e., ground downward along the long axis direction of the adjacent tooth), the occlusal support recess is ground on the adjacent tooth to form the occlusal support recess.

[0036] In the case where the adjacent tooth area to be ground and the occlusal support recess are both close to the edentulous area and the two partially overlap, on the basis of the above scheme, the opening structure corresponding to the occlusal support recess and the opening structure corresponding to the adjacent tooth area to be ground intersect, so that the guide plane passes through the side wall of the occlusal support recess positioning guide rail, and forms an opening on the side wall of the occlusal support recess positioning guide rail, which is the needle entry port 5.

[0037] In accordance with clinical operation requirements, the thickness of the prepared guide plate body is generally 1.5-1.7 mm, and the edge of the opening structure corresponding to the occlusal support recess extends 2.9-3.1 mm along the long axis direction of the adjacent tooth to form an occlusal support recess positioning guide rail 4, that is, the height dimension of the occlusal support recess positioning guide rail is 2.9-3.1 mm.

[0038] In some preferred schemes, in order to standardize clinical operations and avoid mistakes during the grinding of the occlusal rest recess, the inner wall of the occlusal rest recess positioning guide in the above scheme is provided with a plurality of protrusion structures 6, and the plurality of protrusion structures are distributed on the inner walls on both sides of the occlusal rest recess positioning guide, so that when the bur is grinding the occlusal rest recess, in addition to grinding downward along the long axis of the adjacent teeth, the bur also forms a "Z"-shaped or "S"-shaped processing guide when bypassing each protrusion inward.

[0039] In some other solutions, a skylight 9 is provided on the adjacent tooth covering structure to facilitate the doctor to observe the changes of the adjacent teeth during the operation and save materials at the same time.

[0040] The occlusal support recess processing needle structure used in conjunction with the preparation guide plate of the present invention is shown in FIG. Figure 8 As shown, one end of the needle is a hemispherical grinding needle 11, and the middle area of ​​the needle is provided with a limiting structure 10 adapted to the occlusal support recess positioning guide rail or whose bottom structure can extend into the occlusal support recess positioning guide rail, such as an inverted cone.

[0041] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Example:

[0043] This embodiment is a solution to implement the present invention on a specific dentition defect model. This embodiment is implemented on Geomagic software:

[0044] The first step is to obtain and reconstruct a digital maxillary dentition defect model (in this embodiment, Figure 3 The maxillary standard dentition defect model shown in the figure is taken as an example, but the present invention is not limited thereto), wherein 17 teeth ( Figure 3 The white arrows point to the abutment teeth or the adjacent teeth of the edentulous area, and part of the upper inner side needs to be ground off, and the occlusal support recess needs to be prepared;

[0045] On the above 17 abutments, part of the data was pre-grinded by computer software to generate an occlusal rest concave that meets clinical requirements (the standard occlusal rest concave is a round triangle with a hemispherical bottom and a grinding depth of 1.5 mm). Figure 4 As shown, the area to be removed inside the adjacent teeth is marked with different colors ( Figure 4 This area is not shown in the figure) to complete the digital design of the mesial guide plane of the abutment tooth in the future. The shape of the guide plane coincides with the position of the mesial opening of the guide plate, which is convenient for the later clinical operation and realizes the unification of the guide plane design and clinical preparation;

[0046] After that, the corresponding preparation guide body data is generated, and the thickness is designed to be 1.6mm;

[0047] The second step is to remove the structural data of the occlusal support recess on the preparation guide body data, form an opening structure corresponding to the occlusal support recess, and then make the edge of the opening structure extend along the long axis of the abutment tooth and form a cylindrical structure with a height of about 3mm to form the occlusal support recess positioning guide rail data, and then design two protrusions on the opposite side walls in the cylindrical structure;

[0048] Then, the structural data covering the adjacent teeth to be ground and part of the data of the occlusal support recess positioning guide rail are removed along the denture placement direction, so as to form a guide plane on the adjacent teeth covering data and the occlusal support recess positioning guide rail data, and the bur entry port is formed after the partial data of the occlusal support recess positioning guide rail is removed; the preparatory guide plate model of this embodiment is obtained, see Figure 5 shown.

[0049] Furthermore, based on the above model, SLM technology is used to complete the production of metal (specific material: cobalt-chromium alloy) preparatory guide plate ( Figure 6 as shown); Figure 6 The preparation guide is polished and placed on the dental model. Figure 7 Check and confirm the stability in position as shown.

[0050] Embodiment 2:

[0051] Design and use mechanical digital technology to process a tungsten steel needle that matches the preparation guide plate of Example 1. The needle is shaped as follows: Figure 8 As shown, the end of the needle is a hemispherical grinding needle, and a conical limiter structure groove is provided in the middle of the needle. The distance between the conical bottom and the end of the needle is about 6.1mm (i.e., the support recess depth 1.5mm + guide rail height 3.0mm + guide plate thickness 1.5mm).

[0052] When using, after removing the adjacent tooth area to be ground, insert the needle with a limiter through the needle entry port on the preparation guide plate. Fig. 9 As shown ( Fig. 9The machining process of the adjacent tooth grinding area is not shown) "Z" grinding is performed on the occlusal surface of the abutment of the model along the thin wall and the guide rail. The needle always moves close to the guide rail. The depth and shape are limited by the needle limiter and the guide rail of the guide plate to complete the precise preparation of the occlusal concave. Fig.10 As shown, the white arrow indicates the prepared occlusal rest recess.

Claims

1. A preparation guide plate capable of positioning an occlusal rest recess, comprising a preparation guide plate body, wherein the preparation guide plate body comprises an edentulous area covering structure (1) and an adjacent tooth covering structure (2), characterized in that: The portion of the adjacent tooth covering structure corresponding to the adjacent tooth area to be removed is an open structure, and the opening structure corresponding to the adjacent tooth area to be removed is close to the edentulous area covering structure (1), and a guide plane (3) is formed between the opening structure corresponding to the adjacent tooth area to be removed and the adjacent tooth covering structure, and the guide plane is arranged along the denture placement direction; The portion of the adjacent tooth covering structure corresponding to the occlusal support recess is an open structure, and the edge of the opening structure corresponding to the occlusal support recess extends along the long axis direction of the adjacent tooth to form an occlusal support recess positioning guide rail (4); at the same time, a needle entry port (5) is provided on the side wall of the occlusal support recess positioning guide rail.

2. The preparation guide plate for positioning the occlusal rest recess according to claim 1, characterized in that: The opening structure corresponding to the occlusal support recess is close to the covering structure of the missing teeth area, and the opening structure corresponding to the occlusal support recess and the opening structure corresponding to the area to be removed of the adjacent teeth intersect, so that the guide plane passes through the side wall of the occlusal support recess positioning guide rail and forms an opening on the side wall of the occlusal support recess positioning guide rail, and the opening is the needle entry port (5).

3. The preparation guide plate for positioning the occlusal rest recess according to claim 1, characterized in that: The thickness of the preparation guide plate body is 1.5-1.7 mm, and the edge of the opening structure corresponding to the occlusal support recess extends 2.9-3.1 mm along the long axis direction of the adjacent tooth to form an occlusal support recess positioning guide rail (4).

4. The preparation guide plate for positioning the occlusal rest recess according to claim 1, characterized in that: The inner wall of the occlusal support recess positioning guide rail is provided with a plurality of protruding structures (6), and the plurality of protruding structures are distributed on the inner walls on both sides opposite to each other in the occlusal support recess positioning guide rail.

5. The method for constructing the preparatory guide plate model according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: (1) determining the adjacent teeth to be removed area and the occlusal support recess on the edentulous data model; generating the preparation guide body data on the edentulous model, the preparation guide body data including the edentulous area coverage structure data and the adjacent teeth coverage structure data; (2) removing the structural data of the occlusal support recess covering the data of the preparation guide body, forming an opening structure corresponding to the occlusal support recess, and then extending the edge of the opening structure along the long axis of the adjacent tooth to form the occlusal support recess positioning guide rail data, and forming an opening for the needle in the side wall of the occlusal support recess positioning guide rail data; The structural data covering the area to be removed of the adjacent teeth are cut out on the prepared guide plate body data, and the cutting direction is along the denture placement direction, thereby forming a guide plane on the adjacent teeth covering structural data.

6. The method for constructing the preparatory guide plate model according to claim 2, characterized in that: The method comprises the following steps: (1) determining the adjacent teeth to be removed and generating the occlusal support recess on the edentulous model; generating the preparation guide plate body data on the edentulous model, wherein the preparation guide plate body data includes the edentulous area coverage structure data and the adjacent teeth coverage structure data; (2) removing the structural data of the occlusal rest recess covering the data of the preparation guide body, forming an opening structure corresponding to the occlusal rest recess, and then extending the edge of the opening structure along the long axis direction of the adjacent tooth to form the occlusal rest recess positioning guide rail data; Then, the structural data covering the area to be ground of the adjacent teeth and part of the data of the occlusal support recess positioning guide rail are cut away along the direction of the denture placement path, thereby forming a guide plane on the adjacent tooth covering data and the occlusal support recess positioning guide rail data, and the local data of the occlusal support recess positioning guide rail is cut away to form a needle entry port.

7. The method for manufacturing the preparatory guide plate according to any one of claims 1 to 4, characterized in that: After modeling using the method described in claim 5 or 6, the preliminary guide plate is processed using a 3D printing method.

8. A turning needle for processing the preparatory guide plate according to any one of claims 1 to 4, comprising a turning needle body, characterized in that: One axial end of the needle body is an occlusal support concave grinding head, and the occlusal support concave grinding head is hemispherical in shape; a limiting structure is provided on the needle body, and the part of the limiting structure axially close to the support concave grinding head is adapted to the occlusal support concave positioning guide rail.

9. The needle according to claim 8, characterized in that: The limiting structure is in the shape of an inverted cone, and the pointed end of the inverted cone faces the supporting concave grinding head.

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