A multifunctional resin guide plate for assisting bonding of periodontal splints and its preparation method

Abstract

The present invention relates to a multifunctional resin guide plate for assisting in bonding periodontal splints and a preparation method thereof. The multifunctional resin guide plate includes a loose tooth fixing device and / or a splint positioning device. The splint positioning device is optional and can be detachably connected to the loose tooth fixing device. The present application utilizes full digitalization technology to produce a multifunctional resin guide plate for assisting in bonding periodontal splints based on a digital model of the natural curved surface morphology of teeth. This can avoid problems such as excessive thickness of the bonding layer caused by displacement of loose teeth and solve problems such as adverse stress during the bonding process. Computer-aided design software is used to make the design of the multifunctional resin guide plate intuitive, easy to modify, and convenient to observe. High-precision 3D printing / CNC milling / die-casting molding technology can enable the loose tooth retaining device, splint positioning device, and periodontal splint to be assembled and formed, avoiding assembly difficulties caused by physical errors.

Description

Technical Field

[0001] The present invention belongs to the field of oral restoration and periodontitis, and specifically relates to a multifunctional resin guide plate for assisting in the bonding of periodontal splints and a preparation method thereof. The guide plate can be applied to the bonding operation of any form of periodontal splints in the oral cavity, and is particularly suitable for the precise bonding of CAD / CAM periodontal splints. Background Art

[0002] Periodontal disease is a destructive disease of periodontal tissue caused by multiple factors such as plaque, inflammation, and trauma. As the most common chronic inflammatory oral disease in humans, its incidence rate in the Chinese population remains high.

[0003] The direct harm of periodontal disease is the gradual loosening and displacement of teeth, which can lead to chewing difficulties and affect patients' aesthetics, pronunciation, and mental health. Connecting loose teeth with surrounding relatively healthy teeth using splints to form a "multi-rooted giant tooth" can mobilize the compensatory capacity of the periodontal tissue, effectively distributing bite forces, reducing the load on individual teeth, and improving tolerance to external forces. It can also limit the displacement and elongation of loose teeth and reduce food impaction.

[0004] The main loose tooth fixation technologies currently used at home and abroad include ligature wire composite resin splints, fiber band resin splints, metal fixation splints, etc.

[0005] During the current loose tooth fixation technology bonding, after the periodontal splint is positioned on the lingual / labial side of the abutment tooth, the doctor manually presses the splint toward the lip / lingual side. Since periodontal disease patients have relatively large mobility of teeth, abutment teeth often shift when pressed manually. Especially when multiple loose teeth are involved, the displacement of each tooth is often uneven, resulting in the periodontal splint not fitting tightly with the abutment teeth and the local adhesive layer being too thick, affecting the durability of the splint. In the prior art, to prevent the displacement of loose teeth during the bonding process, doctors usually use a small amount of resin to connect the adjacent teeth together, and then fix the teeth with a periodontal splint; or use impression materials such as silicone rubber to fill the gaps between the teeth to limit the displacement of the teeth caused by the free hand during the bonding process.

[0006] The defects of the current existing technology are: first, the doctor's operation technique is highly sensitive and the chairside time is long in order to prevent the loose abutment teeth from shifting during splint bonding; second, it is difficult to ensure that the final bonding position of the splint is consistent with the established design position. Summary of the Invention

[0007] In order to solve the problems existing in the prior art, the present invention provides a resin guide plate for auxiliary bonding of periodontal splints and a manufacturing method thereof, which prevents loose abutment teeth from shifting during splint bonding and ensures that the final bonding position is consistent with the established design position.

[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a multifunctional resin guide plate for assisting in bonding periodontal splints, including a loose tooth fixing device and / or a splint positioning device, the splint positioning device is detachably connected to the loose tooth fixing device, and a front card slot and a rear card slot are provided on the loose tooth fixing device, the front card slot is consistent with the labial surface curve shape of the patient's loose tooth, and the rear card slot is used to cover part of the buccal and lingual surfaces and occlusal surfaces of the premolars or molars, and a positioning circular hole is provided on the occlusal surface, and the splint positioning device includes a connecting rod and a connecting plate connected to each other, and positioning columns are provided at both ends of the connecting rod, and the positioning columns are interference fit with the positioning circular holes; the connecting plate is arc-shaped, and splint positioning holes are provided on both sides of its front end for connecting the periodontal splint.

[0009] The connecting rod and the connecting plate are connected through a connecting column. One connecting column is provided, and two ends of the connecting column are respectively connected to the middle of the connecting rod and the connecting plate.

[0010] Splint positioning holes are provided at both ends of the connecting plate, and the splint positioning holes can be connected to the periodontal splint through the periodontal splint positioning columns on the lingual side of the periodontal splint.

[0011] The surfaces of the front and rear slots are the same shape as the surfaces of the covered teeth, forming a fit. The upper end of the front slot covers the set area of ​​the incisal end or occlusal surface of the affected tooth, and the rear slot is located in the non-concave area above the buccal and lingual surface guide line of the non-affected tooth.

[0012] The gingival side of the guide plate is consistent with the arc of the gum, and the end line of the guide plate is above the gum.

[0013] When the patient's periodontal splint needs to be set on the labial side, the front slot of the loose tooth retention device in the resin guide plate for auxiliary bonding of the periodontal splint is set on the lingual side, consistent with its curved surface shape, forming a fit, wrapping part of the lingual side and incisal end of the affected tooth, and removing the splint positioning device.

[0014] A method for preparing a multifunctional resin guide plate for assisting in bonding periodontal splints according to the present invention comprises the following steps:

[0015] S1: Use an intraoral scanner to scan the patient's oral cavity and obtain the patient's dentition information to form a digital model;

[0016] S2: Design of a resin guide loose tooth fixture based on the patient's digital oral model;

[0017] S3: Design a digital periodontal splint and splint positioning device on the patient's digital oral model. If a fiber-reinforced resin periodontal splint is made by manual indirect restoration on a printed patient dentition model, the splint is scanned after completion to generate a digital model containing the splint information, and then the splint positioning device is designed.

[0018] S4: The loose tooth fixing device and splint positioning device are solid-formed by 3D printing / CNC milling / die-casting.

[0019] Step S1 uses an intraoral scanner to scan the complete dentition information, free gingiva and attached gingiva of the patient's upper and lower jaws in the oral cavity. The patient's model data needs to be exported in STL format;

[0020] Step S2: Import the patient's digital oral model into EXOCAD software, fill the undercut, draw the shape curve of the loose tooth fixture, and export it in stl format.

[0021] In step S3, the patient's digital intraoral model and the fixture of the loose tooth are imported into the GEOMAGIC software. According to the characteristics of the resin guide plate for the auxiliary bonding periodontal splint, the splint positioning device is designed using the basic operations such as features and Boolean operations in GEOMAGIC, and holes are punched in the loose tooth fixture. Finally, the model is exported in the stl format.

[0022] The positioning holes of the splint positioning device are based on the positioning columns and are operated using Boolean calculations.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects: the loose tooth retention device in the multifunctional resin guide plate for auxiliary bonding of the periodontal splint can prevent the loose tooth from shifting during the bonding process, thereby avoiding increasing the thickness of the adhesive layer and reducing the risk of debonding of the periodontal splint.

[0024] The multifunctional resin guide plate splint positioning device for assisting in bonding periodontal splints can bond the indirect periodontal splint to the preset position of the abutment tooth during the bonding process, avoiding the periodontal splint from not fitting the abutment tooth surface and reducing the risk of periodontal splint detachment; avoiding adverse stress caused by the movement of the affected tooth after fixation, avoiding excessive changes in the patient's original occlusal relationship, and reducing occlusal trauma.

[0025] The splint positioning device in the present invention can be connected to the indirect periodontal splint. When performing pre-bonding treatment on the tissue surface of the indirect periodontal splint, the splint positioning device can be held to avoid contamination of the splint tissue surface during bonding, which may lead to bonding failure.

[0026] Furthermore, the present invention, due to its fully digital design, utilizes intraoral digital scanning technology, combined with CNC cutting, die-casting, or 3D printing, to achieve fully integrated personalized design and computer-aided production. This improves patient comfort, reduces technical sensitivity, and improves work efficiency. Since the present invention does not involve traditional impression technology, it avoids the inaccurate impressions caused by loose teeth shifting, which is often associated with traditional impression technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1Top view of the loose tooth retention device for the multifunctional resin guide.

[0028] Figure 2 Labial and buccal view of the splint positioning device for the multifunctional resin guide.

[0029] Figure 3 This is the lingual view of the CAD / CAM periodontal splint.

[0030] Figure 4 It is an assembly of a multifunctional resin guide and a CAD / CAM periodontal splint.

[0031] Figure 5 Position the multi-function resin guide plate on the 3D printed model.

[0032] Figure 6 Lingual view of the design drawing for the missing tooth restoration.

[0033] Figure 7 Lingual view of an edentulous CAD / CAM periodontal splint.

[0034] Figure 8 Labial view of the assembly of the CAD / CAM periodontal splint and the edentulous restoration.

[0035] Figure 9 A top view of a loose tooth retention device for another type of multifunctional resin positioning guide used to assist in bonding periodontal splints.

[0036] Figure markings: 1-front slot; 2-positioning circular hole; 3-connecting rod; 4-connecting column; 5-positioning column; 6-connecting plate; 7-splint positioning hole; 8-periodontal splint positioning column; 9-bonding hole groove of restoration; 10-bonding column of periodontal splint. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are intended only to explain the relevant content and are not intended to limit the present invention. It should also be noted that, for ease of description, only portions relevant to the present invention are shown in the accompanying drawings.

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] Unless otherwise stated, the exemplary embodiments / examples shown are to be understood as providing exemplary features of various details of some ways in which the technical concept of the present invention can be implemented in practice. Therefore, unless otherwise stated, the features of the various embodiments / examples may be further combined, separated, interchanged, and / or rearranged without departing from the technical concept of the present invention.

[0040] The use of cross hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise indicated, the presence or absence of cross hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the order described. In addition, the same figure numbers represent the same components.

[0041] When a component is referred to as being “on,” “over,” “connected to,” or “coupled to” another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another component, there are no intervening components present. For this purpose, the term “connected” may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0042] refer to Figure 1 and Figure 2 A multifunctional resin guide plate for assisting in the bonding of periodontal splints includes a loose tooth fixing device and / or a splint positioning device, wherein the splint positioning device is detachably connected to the loose tooth fixing device. The loose tooth fixing device is provided with a front slot and a rear slot. The front slot is consistent with the labial curved surface shape of the patient's loose tooth, and the rear slot is used to cover the non-concave area above the buccal and lingual guide wire of the non-affected tooth. A positioning circular hole 2 is provided on the occlusal surface. The splint positioning device includes a connecting rod 3 and a connecting plate 6 connected to each other. Positioning posts 5 are provided at both ends of the connecting rod 3. The positioning posts 5 are interference fit with the positioning circular hole 2.

[0043] The connecting rod 3 and the connecting plate 6 are connected via a connecting column 4. One connecting column 4 is provided, and its two ends are respectively connected to the connecting rod 3 and the connecting plate 6.

[0044] refer to Figure 3 and Figure 4The connecting plate 6 is arc-shaped, and splint positioning holes 7 are provided on both sides of its front end, which can be connected to the positioning columns 8 on the lingual side of the periodontal splint.

[0045] The gingival side of the positioning guide is consistent with the gingival arc line, and the end line of the guide is above the gum.

[0046] When the patient's periodontal splint needs to be set on the labial side, the front slot of the loose tooth retention device in the multifunctional resin positioning guide for auxiliary bonding of the periodontal splint is set on the lingual side, consistent with its curved surface shape, forming a fit, wrapping part of the lingual side and incisal end of the tooth row, and removing the splint positioning device.

[0047] In one implementation, only the loose tooth fixture is provided, with anterior and posterior slots. The slot surfaces align with the tooth surfaces they cover, creating a chiseled fit. The anterior slot conforms to the labial curve of the patient's loose tooth, with its upper end covering a predetermined area of ​​the incisal or occlusal surface of the affected tooth. The posterior slot covers the buccal and lingual non-undercut areas and occlusal surface above the guide wire of the non-affected tooth. The gingival angle of the guide plate aligns with the gingival curve, with the guide plate's termination line located above the gingiva.

[0048] The present invention also provides a method for preparing a resin guide plate for assisting in bonding a periodontal splint, comprising the following steps:

[0049] S1: Use an intraoral scanner to scan the patient's oral cavity and obtain the patient's dentition information to form a digital model;

[0050] S2: Design a resin guide loose tooth fixture based on the patient's digital oral model. Figure 1 ;

[0051] S3: Design digital periodontal splints and splint positioning devices based on the patient's digital oral model. Figure 2 If a fiber-reinforced resin periodontal splint is made by manually performing indirect restoration on a printed model of the patient's dentition, the splint is scanned after completion to generate a digital model containing the splint information, and then the design of the splint positioning device is completed.

[0052] S4: The loose tooth fixing device and splint positioning device are solid-formed by 3D printing / CNC milling / die-casting.

[0053] A resin guide plate for assisting in the bonding of a periodontal splint is prepared using any of the methods described in the embodiments. The resin guide plate for the periodontal splint prepared using the aforementioned method can prevent excessive bonding thickness and address adverse stress issues caused by loose tooth displacement during bonding. The resin guide plate for the periodontal splint, designed using computer-aided design software, is intuitive, easy to modify, and convenient to observe. High-precision 3D printing / CNC milling / die-casting technology allows for the assembly of the loose tooth retention device, splint positioning device, and periodontal splint, avoiding assembly difficulties caused by physical errors.

[0054] The method for using the resin guide plate for assisting the bonding of a periodontal splint according to the present invention comprises the following steps:

[0055] S11: Connecting the positioning post of the periodontal splint to the positioning hole of the splint positioning device;

[0056] S12: Pretreatment of the patient's tooth tissue and the tissue surface of the periodontal splint before bonding;

[0057] S13: Install the loose tooth fixture on the patient's dentition, ensuring that the incisal end of the affected tooth fits tightly against the front slot and the rear slot fits tightly against the covered occlusal surface.

[0058] S14: Apply a thin layer of resin cement to the tissue surface of the periodontal splint;

[0059] S15: Fix the connected splint positioning device and periodontal splint on the loose tooth fixture, so that the periodontal splint fits the lingual side of the abutment tooth, check whether it is in place after pre-curing, and complete curing;

[0060] S16: Grind away the connecting column 4 of the splint positioning device using a high-speed mobile phone.

[0061] S17: Take out the loose tooth fixture.

[0062] S18: Polishing the lingual surface of the periodontal splint.

[0063] Example 1:

[0064] A method for making a resin guide plate for lingual periodontal splint for auxiliary bonding indirect restoration, referring to Figure 1-Figure 5 , follow these steps:

[0065] S1: Use an intraoral scanner to scan the patient's oral cavity and obtain the patient's dentition information to form a digital model;

[0066] S2: Design a resin guide loose tooth fixture based on the patient's digital oral model. Figure 1 ;

[0067] S3: Design digital periodontal splints and splint positioning devices based on the patient's digital oral model. Figure 2 If a fiber-reinforced resin periodontal splint is made by manually performing indirect restoration on a printed model of the patient's dentition, the splint is scanned after completion to generate a digital model containing the splint information, and then the design of the splint positioning device is completed.

[0068] S4: The loose tooth fixing device and splint positioning device are solid-formed using 3D printing / CNC milling / die-casting methods.

[0069] When performing step S1 , a scanner such as 3shape, Raycus, or Pinrui may be used to perform an intraoral scan on the patient to obtain information about the patient's dentition and surrounding soft tissues.

[0070] When performing step S2, software such as EXOCAD or GEOMAGIC can be used. Based on the labial and occlusal surface information and arrangement information of the mandibular dentition extracted in step S1, after filling the undercut, the shape of the resin guide for assisting the bonding of the periodontal splint and the loose tooth fixing device can be designed using the curve editing step, and excess material can be removed in the wax-up editing step.

[0071] In step S3, GEOMAGIC software can be used to design the retaining post, connecting rod, connecting post, and connecting plate for the splint positioning device based on the position of the loose tooth fixture designed in step S2. The connecting plate should be curved to follow the dental arch. The specific size should be designed based on a combination of factors such as the loose tooth fixture, the final material of the guide plate, and the patient's dental arch morphology.

[0072] When performing step S3, the production of the positioning holes of the splint positioning device varies according to the different periodontal splint production methods. Two periodontal splint positioning columns 8 are set on the lingual polishing surface of the CAD / CAM periodontal splint during design, and the positioning holes 7 are generated based on Boolean operations with the splint positioning device in GEOMAGIC; the indirectly produced fiber band periodontal splint can use resin accumulation to generate two positioning columns during extraoral production. After scanning, the positioning holes on the splint positioning device are generated through Boolean operations in GEOMAGIC, so that the positioning columns 7 and the positioning holes 8 are fit together.

[0073] When performing step S4, 3D printing / CNC cutting / die-casting methods can be used to assist in bonding the resin guide of the periodontal splint.

[0074] The method for using the resin guide plate for bonding a periodontal splint according to the present invention is carried out in the following steps:

[0075] S1: Connect the positioning post of the periodontal splint to the positioning hole of the splint positioning device;

[0076] S2: Install the loose tooth fixture on the patient's dentition, ensuring that the incisal end of the affected tooth fits tightly into the front slot and the rear slot fits tightly into the covered occlusal surface;

[0077] S3: Pretreatment of the patient's tooth tissue and the tissue surface of the periodontal splint before bonding;

[0078] S4: Apply a thin layer of resin cement to the tissue surface of the periodontal splint;

[0079] S5: Fix the connected splint positioning device and periodontal splint to the loose tooth fixture, so that the periodontal splint fits the lingual side of the abutment tooth, check whether it is in place after pre-curing, and complete curing;

[0080] S6: Use a high-speed mobile phone to grind off the connecting column of the splint positioning device and remove it.

[0081] S7: Remove the loose tooth fixture.

[0082] S8: Polishing the lingual surface of the periodontal splint.

[0083] Example 2:

[0084] A method for manufacturing a resin guide plate for assisting in direct bonding of a labial fiber band resin splint is carried out in the following steps: when the patient's periodontal splint needs to be set on the labial side, the loose tooth retention device is completed using the design, production and use method of Example 1. The difference in design and production is that S2 is required to set the front slot of the loose tooth retention device in the resin guide plate for assisting in bonding the periodontal splint on the lingual side, covering part of the lingual side and incisal end of the dentition, with reference to Figure 9 In this example, since the repositioning of the periodontal splint is not a concern, a splint positioning device may not be provided.

[0085] Example 3:

[0086] When there are missing teeth in the patient's mouth, refer to Figure 6-Figure 8 , the design, production and use methods are as follows:

[0087] The difference between the design and production method of this embodiment and that of the first embodiment lies in S2, which requires first designing the shape and position of the missing tooth in EXOCAD, and then importing it and the remaining dentition information into GEOMAGIC for Boolean operation and merging before design.

[0088] The difference between the method of use of this embodiment and the first embodiment is that S1 requires the restoration of the missing tooth to be placed in vitro. Figure 6 Bonded to the bonding post 10 of the periodontal splint, Figure 7 and Figure 8 .

[0089] The specific implementation method for the resin guide plate for assisting the bonding of periodontal splints described above further illustrates the objectives, technical solutions, and beneficial effects of the present invention. In addition to the aforementioned embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent substitution or equivalent variation falls within the scope of protection claimed by the present invention.

Claims

1. A multifunctional resin guide plate for assisting in bonding periodontal splints, characterized by: The invention comprises a loose tooth fixing device and a splint positioning device, wherein the splint positioning device is detachably connected to the loose tooth fixing device, and a front slot (1) and a rear slot are provided on the loose tooth fixing device, wherein the front slot (1) is consistent with the shape of the labial curved surface of the patient's loose tooth, and the rear slot is used to cover part of the buccal and lingual surfaces and the occlusal surface of the premolar or molar, and a positioning circular hole (2) is provided on the occlusal surface, and the splint positioning device comprises a connecting rod (3) and a connecting plate (6) connected to each other, and positioning columns (5) are provided at both ends of the connecting rod (3). The positioning post (5) is interference-fitted with the positioning circular hole (2); the connecting plate (6) is arc-shaped, and is provided with splint positioning holes (7) on both sides of its front end for connecting the periodontal splint; the connecting rod (3) and the connecting plate (6) are connected via a connecting post (4), and one connecting post (4) is provided, and the two ends of the connecting post (4) are respectively connected to the middle of the connecting rod (3) and the connecting plate (6); the two ends of the connecting plate (6) are provided with splint positioning holes (7), and the splint positioning holes (7) can be connected to the periodontal splint through the periodontal splint positioning post (8) on the lingual side of the periodontal splint.

2. The multifunctional resin guide plate for assisting the bonding of periodontal splints according to claim 1, characterized in that: The front slot (1) and the rear slot have the same shape as the surface of the covered tooth to form a chimeric fit, the upper end of the front slot (1) covers the set area of ​​the incisal end or occlusal surface of the affected tooth, and the rear slot is located in the non-concave area above the buccal and lingual surface guide wire of the non-affected tooth.

3. The multifunctional resin guide plate for assisting the bonding of periodontal splints according to claim 1, characterized in that: The gingival side of the guide plate is consistent with the arc of the gum, and the end line of the guide plate is above the gum.

4. A method for preparing a multifunctional resin guide plate for auxiliary bonding of periodontal splints according to any one of claims 1 to 3, characterized in that The following steps are involved: S1: Use an intraoral scanner to scan the patient's oral cavity and obtain the patient's dentition information to form a digital model; S2: Design of a resin guide loose tooth fixture based on the patient's digital oral model; S3: Design a digital periodontal splint and splint positioning device on the patient's digital oral model. If a fiber-reinforced resin periodontal splint is made by manual indirect restoration on a printed patient dentition model, the splint is scanned after completion to generate a digital model containing the splint information, and then the splint positioning device is designed. S4: The loose tooth fixing device and splint positioning device are solid-formed by 3D printing / CNC milling / die-casting.

5. The method for preparing the multifunctional resin guide plate for assisting the bonding of periodontal splints according to claim 4, characterized in that: Step S1 uses an intraoral scanner to scan the complete dentition information, free gingiva and attached gingiva of the patient's upper and lower jaws in the oral cavity. The patient's model data needs to be exported in STL format; Step S2: Import the patient's digital oral model into EXOCAD software, fill the undercut, draw the shape curve of the loose tooth fixture, and export it in stl format.

6. The method for preparing the multifunctional resin guide plate for assisting the bonding of periodontal splints according to claim 4, characterized in that: In step S3, the patient's digital intraoral model and the fixture of the loose tooth are imported into the GEOMAGIC software. According to the characteristics of the resin guide plate for the auxiliary bonding periodontal splint, the splint positioning device is designed using basic operations including features and Boolean operations in GEOMAGIC, and holes are punched in the loose tooth fixture, which is finally exported in the STL format.

7. The method for preparing the multifunctional resin positioning guide for assisting the bonding of periodontal splints according to claim 4, characterized in that: The positioning holes of the splint positioning device are based on the positioning columns and are operated using Boolean calculations.

Images