Novel cantilever point contact type fixed restoration

Abstract

The embodiment of the invention provides a novel cantilever point contact type fixed restoration, and relates to the technical field of oral cavity restoration. The novel cantilever point contact type fixed restoration comprises an alveolar bone and a restoration bridge body used for restoring dentition defects, meanwhile, one end of the restoration bridge body is provided with an adjustable connector, and the adjustable connector is used for improving the mechanical strength and fracture resistance of the restoration bridge body. One side, far away from the repairing bridge body, of the adjustable connecting body is provided with a retention wing, the other end of the retention wing is provided with an abutment, the adjustable connecting body and the retention wing are connected and bonded on the abutment, and tooth preparation for the abutment is not needed, so that the integrity of the abutment is protected. According to the scheme, the fracture resistance and the mechanical strength of the repairing bridge body can be effectively improved, so that the service life of the repairing bridge body is longer, the economic burden of a patient is relieved, and meanwhile, the integrity of dentition is also kept.

Description

Technical Field

[0001] The present application relates to the technical field of oral restoration, and in particular to a novel cantilever point-contact fixed restoration. Background Art

[0002] In the field of oral rehabilitation, the restoration of missing anterior teeth has always been an important topic. Traditional restoration methods mainly include removable dentures, fixed bridges and implant dentures. However, these methods have some obvious shortcomings in practical applications, which limits their widespread use;

[0003] 1. Bonded bridges with traditional veneer-type retention wings are more likely to break. In particular, the traditional design does not position the shape of the connector, but instead connects the veneer of the retention wing to the transition surface between the repair bridge body, which directly leads to unstable shape of the connector, uneven thickness of the connector, and lack of reliable design parameters for the shape of the connector, which leads to stress concentration at the connector during clinical use of the restoration, and the connector is easy to break; shortening the life of the restoration, resulting in patients frequently changing restorations or repair methods, increasing the economic burden on patients;

[0004] Second, the retention wings of the bonded bridge are traditional veneer designs. Because the retention wings are large veneers, the abutment teeth must be prepared to avoid affecting the normal occlusal function. In addition, for patients with tight bites, the preparation may reach the dentin level, which damages the enamel and dentin to a certain extent, which does not conform to the minimally invasive concept in oral restoration.

[0005] 3. The bonding bridge with retention wings of traditional veneer design has a large bonding area due to its veneer-style retention wings. The edge line connecting the retention wings and the tooth tissue becomes longer, and microleakage of the edge line is prone to increase during use, which increases the risk of secondary caries of the abutment teeth, damages the abutment tooth tissue, and shortens the life of the restoration.

[0006] Fourth, traditional removable dentures are used to repair anterior teeth. Patients need to remove and put on the dentures for cleaning after every meal, which is not convenient enough. Moreover, the chewing efficiency of removable dentures is only 50% of that of fixed dentures. Especially for young people, wearing removable dentures will also have a certain impact on their psychology and social life. Secondly, removable dentures are not aesthetically pleasing, and the workmanship is not as fine as that of bonded bridges.

[0007] 5. Traditional fixed bridge denture restoration requires preparation of the adjacent teeth on both sides, which will cause irreversible damage to the adjacent teeth on both sides. This method is also not advisable.

[0008] 6. For implant denture restoration, there must be sufficient soft and hard tissue support, and the patient must be an adult. Adolescents are not suitable for implant dentures because their bones are not fully developed.

[0009] In summary, the existing methods for restoring missing anterior teeth have many deficiencies in terms of aesthetics, mechanical strength, risk of microleakage, comfort and economy, etc. Therefore, a new cantilever point contact fixed restoration is needed to overcome the defects of the existing technology. Summary of the invention

[0010] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a new cantilever point contact fixed restoration, which can effectively improve the fracture resistance and mechanical strength of the restoration bridge, extend the life of the restoration bridge, reduce the economic burden on patients, and at the same time, maintain the integrity of the dentition.

[0011] This application is implemented as follows:

[0012] The present application provides a novel cantilever point-contact fixed restoration, comprising alveolar bone and a restoration bridge for repairing dentition defects. At the same time, an adjustable connector is provided at one end of the restoration bridge, and the adjustable connector is used to improve the mechanical strength and fracture resistance of the restoration bridge. A retention wing is provided on the side of the adjustable connector away from the restoration bridge, and an abutment is provided at the other end of the retention wing, wherein the adjustable connector and the retention wing are connected and bonded to the abutment, and there is no need to prepare the abutment, thereby protecting the integrity of the abutment.

[0013] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the repair bridge is arranged at the position of the missing teeth on the alveolar bone, and the adjacent teeth are arranged at the end of the repair bridge away from the adjustable connector, wherein the roots of the adjacent teeth and the abutment teeth are embedded in the alveolar socket and connected to the alveolar bone through the periodontal membrane.

[0014] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the restoration bridge is made of lithium disilicate material.

[0015] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the adjustable connector includes connector one, wherein connector one is rectangular in shape to provide mechanical strength and fracture resistance to the repair bridge body, thereby extending the service life of the repair bridge body.

[0016] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the adjustable connector includes a second connector, wherein the second connector is trapezoidal in shape, which enhances the mechanical strength of the repair bridge while providing aesthetics.

[0017] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the connection between the retention wing and the abutment tooth is bonded with a resin adhesive, and after bonding, the edge of the repair bridge is highly polished.

[0018] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the retention wing adopts a point-contact fixed winglet, and the side away from the adjustable connector is a smooth surface to facilitate the coating of resin adhesive.

[0019] According to the novel cantilever point-contact fixed restoration of the embodiment of the present application, the restoration bridge is carved using an in vitro aesthetic wax pattern, and the wax pattern is reproduced into the patient's mouth using diagnostic finishing technology.

[0020] Beneficial effects of the present invention:

[0021] 1. The repair bridge of the present invention adopts a cantilever design and is made of lithium disilicate material; the design of the repair bridge repositions the shape of the adjustable connector into connector 1 or connector 2, wherein connector 1 has higher mechanical strength, is less likely to break, and has a longer service life as verified by three-dimensional finite element and clinical experiments. Connector 2 can be more beautiful to a certain extent, and at the same time, has better mechanical strength than the traditional design of non-standard connectors. The selection of connector 1 and connector 2 depends on the size of the abutment teeth in the dentition defect to be repaired.

[0022] 2. The retention wing of the present invention is designed as a point-contact winglet. Because it is relatively small, it does not require tooth preparation for the abutment tooth during application, thereby protecting the integrity of the abutment tooth and complying with the concept of minimally invasive and aesthetically pleasing oral restoration. At the same time, because it is relatively small and connected to the adjustable connector and bonded to the abutment tooth with a short bonding edge line, it is easier for patients to clean the tooth surface, thereby reducing the occurrence of secondary caries.

[0023] 3. The retention wings of the present invention adopt point-contact resin bonding to fix the repair bridge. Because it is a denture fixed on the teeth and cannot be taken out by itself, it is more beautiful, convenient, and has higher chewing efficiency than traditional removable dentures. At the same time, it can enhance the self-confidence of young people and they do not have to bear the risk of teeth falling out of the mouth during socializing. At the same time, the repair bridge adopts a fixed form, which can be suitable for patients with missing anterior teeth who cannot be implanted due to insufficient soft and hard tissues, as well as patients who have congenital anterior tooth loss in adolescence but cannot have dental implants and need fixed dentures for transition.

[0024] Summary: The restoration bridge designed in the present invention can be directly manufactured without tooth preparation, which conforms to the concept of minimally invasive surgery; and the design of the restoration bridge repositions the shape of the restoration bridge, such as connector one and connector two, which can increase the mechanical strength and fracture resistance of the restoration; the restoration bridge is shortened to a small wing point contact design, which can be more lightweight and beautiful on the one hand, and on the other hand can reduce the edge line of the bonding between the restoration bridge and the abutment tooth, reduce microleakage, and reduce the risk of secondary caries of the abutment tooth, and can effectively restore the integrity of the dentition; and this new design can extend the life of the restoration bridge, increase aesthetics, and protect the abutment tooth tissue, thereby reducing the economic burden on patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a three-dimensional schematic diagram of a plaster model of a repaired bridge structure according to an embodiment of the present application;

[0027] Figure 2 It is a three-dimensional exploded schematic diagram of the front lip side of the repaired bridge body, the connector 1 and the retention wing structure according to an embodiment of the present application;

[0028] Figure 3 It is a three-dimensional exploded schematic diagram of the back palatal side of the repaired bridge and the connector according to an embodiment of the present application;

[0029] Figure 4 It is a three-dimensional exploded schematic diagram of the reverse palatal side of the repaired bridge and a connector according to an embodiment of the present application;

[0030] Figure 5 It is a schematic diagram of designing a repair bridge for a patient and performing a three-dimensional finite element analysis stress diagram using CBCT data according to an embodiment of the present application;

[0031] Figure 6 is a schematic diagram of trial fitting of a repair bridge on a 3D model according to an embodiment of the present application;

[0032] Figure 7 is a schematic diagram of the design of an adjustable connector according to an embodiment of the present application;

[0033] Figure 8 It is a flow chart of the bridge repair implementation method according to an embodiment of the present application.

[0034] In the figure: 1. alveolar bone; 2. abutment tooth; 3. retention wing; 4. connector 1; 5. restoration bridge; 6. adjacent teeth; 7. connector 2. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0036] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] like Figure 1-Figure 6 As shown, the novel cantilever point contact fixed prosthesis according to the embodiment of the present application includes an alveolar bone 1 and a prosthetic bridge 5 for repairing dentition defects. The alveolar bone 1 is a part of the upper and lower jaws, located in the oral cavity, surrounding and supporting the teeth. It is composed of a series of alveolar sockets, each of which contains the root of a tooth. The main function of the alveolar bone 1 is to provide stable support for the teeth and ensure the normal function of the teeth during chewing and speaking;

[0038] The restoration bridge 5 is arranged at the position of the missing tooth on the alveolar bone 1, and an adjacent tooth 6 is arranged at one end of the restoration bridge 5 away from the adjustable connector, wherein the roots of the adjacent tooth 6 and the abutment tooth 2 are embedded in the alveolar socket and connected to the alveolar bone 1 through the periodontal membrane, and the crowns of the adjacent tooth 6 and the abutment tooth 2 are exposed in the oral cavity for chewing food; wherein the restoration bridge 5 is made of lithium disilicate material; the restoration bridge 5 is carved with an in vitro aesthetic wax model, and the wax model is reproduced into the patient's mouth using diagnostic veneer technology; the final restoration effect is adjusted according to the patient's feedback to ensure the aesthetics of the restoration bridge 5 and the patient's satisfaction; wherein the restoration bridge 5, the connector 4 and the adjustable connector are all integrally formed;

[0039] At the same time, an adjustable connector is provided at one end of the repair bridge body 5, and the adjustable connector is used to improve the mechanical strength and anti-fracture ability of the repair bridge body 5, and the adjustable connector is integrally formed with the repair bridge body 5.

[0040] like Figure 2 and Figure 4 As shown, an embodiment of the adjustable connector includes a connector 4, wherein the connector 4 is rectangular to provide mechanical strength and anti-fracture capability of the repair bridge 5, thereby extending the service life of the repair bridge 5.

[0041] like Figure 3 As shown, it is a second embodiment of the adjustable connector, wherein the same components are not repeated, and the adjustable connector includes a second connector 7, wherein the second connector 7 is in a trapezoidal shape, which enhances the mechanical strength of the repair bridge 5 while providing aesthetics;

[0042] Specifically, connector 2 7 is used in conjunction with larger teeth adjacent to missing teeth of different patients, while connector 1 4 is used in conjunction with smaller teeth adjacent to missing teeth of patients, and the specific connector 2 7 and connector 1 4 to be used need to be selected in real time according to the actual condition of the patient's teeth;

[0043] Finally, the shape of the adjustable connector is connector 1 4 or connector 2 7. After three-dimensional finite element analysis and clinical experiments, connector 1 4 has higher mechanical strength, is less likely to break, and has a longer service life. Connector 2 7 can be more aesthetically pleasing to a certain extent, and has better mechanical strength than the traditional non-standard connector design. The selection of connector 1 4 and connector 2 7 depends on the size of the abutment 2 in the dentition defect to be repaired.

[0044] A retention wing 3 is provided on the side of the adjustable connector away from the restoration bridge 5. The retention wing 3 adopts a point-contact fixing winglet, and the side away from the adjustable connector is a smooth surface to facilitate the coating of the resin adhesive. The retention wing 3 adopts a point-contact retention winglet design to reduce the edge line length of the bonding point with the abutment 2, thereby effectively reducing the risk of microleakage and secondary caries of the abutment 2 and protecting the abutment 2 tissue.

[0045] Furthermore, the retention wing 3 is designed as a point contact winglet. Because it is relatively small, it is not necessary to prepare the abutment 2 during application, thus protecting the integrity of the abutment 2 and meeting the concept of minimally invasive and aesthetically pleasing oral restoration. At the same time, because it is relatively small and connected to the adjustable connector and bonded to the abutment 2, the bonding edge line is short, making it easier for patients to clean the tooth surface, thus reducing the occurrence of secondary caries.

[0046] Among them, the retention wing 3 adopts point-contact resin bonding to fix the restoration bridge 5. Because it is a denture fixed on the teeth and cannot be taken out by itself, it is more beautiful, convenient, and has higher chewing efficiency than traditional removable dentures. At the same time, it can enhance the self-confidence of young people and they do not have to bear the risk of teeth falling out of the mouth during socializing. At the same time, the restoration bridge 5 adopts a fixed form, which can be suitable for patients with missing anterior teeth who cannot be implanted due to insufficient soft and hard tissues, and patients who have congenital anterior tooth loss in adolescence but cannot be implanted and need fixed dentures for transition;

[0047] Before the restoration bridge 5 is formally made, a preliminary shape of the restoration is first carved out using wax material in vitro, i.e., in a laboratory environment, which is called an aesthetic wax-up. Through wax-up carving, the preliminary effect of the restoration bridge 5 can be visually seen, which is convenient for adjustment and optimization.

[0048] Specifically, the diagnostic veneer is a temporary restoration bridge 5, which is made by casting the wax-up model carved in vitro into a resin material or other temporary material, and then installing it in the patient's mouth. Through the diagnostic veneer, the patient can intuitively feel the appearance and function of the restoration bridge 5 when actually wearing it, and thus provide feedback.

[0049] In the process of making a prosthetic denture using the prosthetic bridge 5, the retention wings 3 and the adjustable connector, the prosthetic bridge 5 is a denture fixed on the teeth and cannot be removed by itself. Compared with traditional removable dentures, it is more beautiful and convenient, and has a higher chewing efficiency, thereby improving the patient's quality of life.

[0050] Restorative bridge 5 is suitable for patients with anterior tooth loss who cannot be implanted due to insufficient soft and hard tissue, as well as patients who were born with anterior tooth loss during adolescence but are not suitable for dental implants, providing an effective transitional solution;

[0051] The design process of the repair bridge 5 includes using the patient's imaging data CBCT to perform three-dimensional finite element modeling to analyze the stress distribution of the adjustable connector and the retention wing 3 to ensure the scientificity and rationality of the design;

[0052] During the manufacturing process of the repair bridge 5, the parameters of the adjustable connector and the retaining wing 3 are constructed using EXOCAD software, and the CAD-CAM technology is used for production to ensure the accuracy and aesthetics of the repair bridge 5;

[0053] Before bonding, the restoration bridge 5 needs to be placed in the patient's mouth with a rubber dam and bonded with a special resin adhesive. After bonding, the edges of the restoration are highly polished to ensure that the occlusal contact points are normal and to improve the stability and comfort of the restoration.

[0054] Rubber dam is a thin, elastic rubber sheet used in stomatology, especially in dental restoration, root canal treatment, periodontal treatment and other operations. Its main purpose is to isolate the treatment area and provide a dry, sterile environment so that the doctor can operate more precisely;

[0055] The other end of the retention wing 3 is provided with an abutment 2, wherein the adjustable connector is connected to the retention wing 3 and bonded to the abutment 2, and no tooth preparation is required for the abutment 2, thereby protecting the integrity of the abutment 2;

[0056] The connection between the retention wing 3 and the abutment 2 is bonded by a resin adhesive, and after bonding, the edge of the restoration bridge 5 is highly polished to ensure that the occlusal contact point is normal and to improve the stability and comfort of the restoration bridge 5;

[0057] Finally, the resin bonding agent uses Ivocare bonding kit or Cole veneer bonding kit, preferably Ivocare bonding kit, which allows minimally invasive restoration of missing teeth without the need for molar treatment;

[0058] like Figure 1-Figure 8 As shown, in order to achieve the above-mentioned purpose, according to the novel cantilever point contact fixed prosthesis of the embodiment of the present application, the technical steps adopted in the design are as follows:

[0059] S1. Collect imaging data and analyze the plaster model according to the missing teeth in the patient's mouth and predict the aesthetic effect after restoration;

[0060] S2. Using the patient's imaging data (CBCT) to perform three-dimensional finite element modeling to analyze two connector designs of the adjustable connector on the repair bridge 5, such as the stress distribution effect of the connector 1 4 and the connector 2 7, as well as the position of the retention wing 3 and the stress distribution size on the labial side or the palatal side, to optimize the design of the final repair bridge 5;

[0061] S3. Based on the design data of the adjustable connector and the retention wing 3 obtained by the three-dimensional finite element analysis, the patient's plaster model is selected, and an aesthetic wax-up is sculpted in vitro to produce a diagnostic wax-up, simulating the shape of the adjustable connector and the placement of the retention wing 3. The in vitro wax-up is placed in the patient's mouth using the diagnostic veneer mock-up technology to observe the aesthetic effect, and the patient is asked to give subjective opinions, modify the wax-up, and confirm the final restoration effect;

[0062] S4. Clean and polish the adjacent teeth 6 and abutment 2, remove the undercuts, use the 3SHAPE oral scanning device to perform an intraoral scan on the patient, and record the occlusal relationship; and wear a temporary restoration bridge 5 for the patient;

[0063] S5. Using the scanned data, the parameters of the adjustable connector and the retention wing 3 of the repair bridge 5 determined in advance are constructed using EXOCAD software, and the morphology is referenced to the aesthetic wax-up morphology confirmed by the patient in advance; then CAD-CAM is used to produce the new repair bridge 5;

[0064] S6. Remove the temporary restoration bridge 5 in the patient's mouth, clean the adjacent teeth 6 and abutment teeth 2, try on the new restoration bridge 5, and start bonding after confirming the shape and color with the patient; before bonding, a rubber dam needs to be placed in the patient's mouth, and a special resin adhesive is used for bonding. After bonding, the edge of the restoration bridge 5 is highly polished, and the occlusal contact point is adjusted to normal.

[0065] Example: After the patient's mouth is scanned to obtain data to construct a three-dimensional finite element model, and when the stress is analyzed to determine that the best design is connector 1 4, the retention wing 3 is placed on the lip side; the restoration bridge 5 is designed based on the parameters obtained by the finite element through EXCAD software; then the new restoration bridge 5 is cut out through CAD-CAM technology, and the restoration bridge 5 is tried in the patient's mouth and on the model; then the restoration bridge 5 is bonded under the rubber dam in the mouth; after fine-tuning, blending and polishing, the restoration bridge 5 is bonded;

[0066] The repair bridge 5 of the present invention mainly relies on digital design. Due to individual differences, the size and shape of the abutment 2 of each patient are different. Therefore, before repair, the imaging data is used to perform three-dimensional finite element modeling and stress distribution analysis on the abutment 2 in the mouth to design and determine the shape of the adjustable connector of the repair bridge 5, and the basic parameters such as the placement position of the connector 1 4 or the connector 2 7 and the retention wing 3 are selected, which can effectively improve the anti-fracture ability and mechanical strength of the new repair bridge 5. This makes the life of the repair bridge 5 longer, and at the same time, it also maintains the integrity of the dentition.

[0067] The electronic components and models used in the present invention can be determined according to actual needs.

[0068] The above description is only an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A new cantilever point contact fixed prosthesis, characterized in that: The invention comprises an alveolar bone (1) and a repair bridge (5) for repairing a tooth defect. At the same time, an adjustable connector is arranged at one end of the repair bridge (5), and the adjustable connector is used to improve the mechanical strength and fracture resistance of the repair bridge (5). A retaining wing (3) is arranged on the side of the adjustable connector away from the repair bridge (5), and an abutment (2) is arranged at the other end of the retaining wing (3). The adjustable connector and the retaining wing (3) are connected and bonded to the abutment (2), and there is no need to prepare the tooth body of the abutment (2), thereby protecting the integrity of the abutment (2).

2. The novel cantilever point contact fixed prosthesis according to claim 1 is characterized in that: The repair bridge (5) is arranged at the position of the missing tooth on the alveolar bone (1), and an adjacent tooth (6) is arranged at one end of the repair bridge (5) away from the adjustable connector, wherein the roots of the adjacent tooth (6) and the abutment tooth (2) are both embedded in the alveolar socket and connected to the alveolar bone (1) via the periodontal membrane.

3. The novel cantilever point contact fixed prosthesis according to claim 2 is characterized in that: The repair bridge (5) is made of lithium disilicate material.

4. The novel cantilever point contact fixed prosthesis according to claim 1 is characterized in that: The adjustable connector includes a connector one (4), wherein the connector one (4) is rectangular in shape to provide the repair bridge (5) with mechanical strength and anti-fracture capability, thereby extending the service life of the repair bridge (5).

5. The novel cantilever point contact fixed prosthesis according to claim 1 is characterized in that: The adjustable connector includes a second connector (7), wherein the second connector (7) is in a trapezoidal shape, which enhances the mechanical strength of the repair bridge (5) while providing aesthetics.

6. The novel cantilever point contact fixed prosthesis according to claim 1 is characterized in that: The connection between the retention wing (3) and the abutment tooth (2) is performed by bonding with a resin adhesive, and after bonding, the edge of the repair bridge (5) is highly polished.

7. The novel cantilever point contact fixed prosthesis according to claim 2 is characterized in that: The retaining wing (3) adopts a point contact type fixing winglet, and the side thereof away from the adjustable connector is a smooth surface to facilitate the coating of a resin adhesive.

8. The novel cantilever point contact fixed prosthesis according to claim 3 is characterized in that: The repair bridge (5) is carved using an in vitro aesthetic wax model, and the wax model is reproduced into the patient's mouth using diagnostic finishing technology.

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