Three-dimensional printed all-ceramic restoration with repositioning function

Abstract

The utility model discloses a three-dimensional printing all-ceramic restoration with a repositioning function, belongs to the technical field of oral cavity restoration, and solves the technical problem that a traditional auxiliary retention form cannot be accurately adhered to a target position during adhesion. The inner surface of the all-ceramic restoration body is provided with a convex repositioning micro-retention form, the tooth body is provided with a concave structure matched with the repositioning micro-retention form, the repositioning micro-retention form is in an inverted cone shape, and the diameter of the repositioning micro-retention form is uniformly and gradiently reduced from the all-ceramic restoration body to the tooth body; according to the utility model, a target position can be accurately positioned when the all-ceramic restoration is bonded, the restoration is ensured to be accurately positioned, a repositioning effect is achieved when the restoration is bonded, the bonding retention force of the restoration is further effectively improved, and the bonded and retained short dental crown all-ceramic restoration is prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of oral restoration, in particular to a three-dimensionally printed all-ceramic restoration with a repositioning function. Background Art

[0002] Retention and stability are prerequisites for the functions of restorations such as veneers and crowns. In clinical practice, abutment teeth with crowns less than 4 mm are called short crowns. Short crown restorations that are only retained by bonding often fall off due to poor retention. Therefore, the application of reasonable auxiliary retention shapes is of great significance to increase the retention of short crown restorations. However, due to the limited accuracy of subtractive manufacturing technology in restoring the inner surface morphology of crowns, the use of auxiliary retention shapes in clinical practice has been significantly reduced. Good retention is mostly achieved through crown lengthening, orthodontic traction, pulp chamber retention crowns, and post-core crown restorations. However, each of the above methods has its own disadvantages. Crown lengthening may affect the gingival morphology of the affected tooth, increase the crown-root ratio, and cause the affected tooth to loosen; orthodontic traction treatment takes a long time and is expensive, which also increases the crown-root ratio; and pulp chamber retention crowns and post-core crown restorations require the affected tooth to complete root canal treatment, and more tooth tissue is removed during the preparation process, which significantly reduces the tooth resistance and increases the risk of tooth fracture.

[0003] The current mainstream subtractive manufacturing has the defect of insufficient precision in cutting auxiliary retention shapes on the inner surface of crowns. With the advancement of three-dimensional printing technology, printing accuracy has been significantly improved. At present, light-curing and inkjet-printed dental ceramic restorations have reached a printing accuracy of 20 microns. In theory, it can break through the limitations of subtractive manufacturing technology and realize the manufacturing of fine auxiliary retention shapes on the inner surface of crowns.

[0004] Traditional auxiliary retention shapes such as nail hole retention shapes and groove retention shapes have a certain effect in improving retention force. However, when the amount of prepared tooth is very small or not prepared and the porcelain veneer is thin, the traditional auxiliary retention shapes cannot be accurately bonded to the target position during bonding. Therefore, how to accurately "reposition" and ensure accurate positioning is a problem that needs to be solved urgently. Utility Model Content

[0005] The utility model is to solve the technical problem that the technical precision of traditional cutting and manufacturing is not enough to produce the required auxiliary retention shape, and the traditional auxiliary retention shape cannot be accurately bonded to the target position during bonding. The utility model aims to provide a three-dimensional printed all-ceramic restoration with a repositioning function. The auxiliary retention shape is produced based on high-precision printing of three-dimensional printing technology, and can be accurately positioned to the target position when the all-ceramic restoration is bonded, ensuring the accurate positioning of the restoration, playing a role of repositioning during bonding, and further effectively improving its bonding retention force, thereby avoiding the falling off of the bonded and retained short crown all-ceramic restoration.

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model provides a three-dimensionally printed all-ceramic restoration with a repositioning function, wherein the all-ceramic restoration is bonded to a tooth, an inner surface of the all-ceramic restoration is provided with a convex repositioning micro-retention shape, a concave structure cooperating with the repositioning micro-retention shape is provided on the tooth, the repositioning micro-retention shape is in an inverted cone shape, and the diameter of the repositioning micro-retention shape is uniformly reduced from the all-ceramic restoration to the tooth.

[0008] As a further technical solution of the utility model, the all-ceramic restoration includes an all-ceramic crown restoration and a ceramic veneer restoration.

[0009] As a further technical solution of the utility model, the diameter of the repositioning micro-retention shape close to the all-ceramic restoration end is 0.6-2mm, the diameter of the repositioning micro-retention shape close to the tooth end is 0.3-1mm, and the depth is 1-2mm.

[0010] As a further technical solution of the utility model, the inner surface of the all-ceramic restoration is also provided with a nail hole retention shape, and the nail hole retention shape is cylindrical.

[0011] As a further technical solution of the utility model, the diameter of the nail hole retention shape is set to 0.6-2 mm, and the depth is 0.6-2 mm.

[0012] As a further technical solution of the utility model, the surface of the repositioning micro-retention shape and / or the nail hole retention shape is provided with surface texture.

[0013] As a further technical solution of the utility model, the surface texture includes serrations and threads.

[0014] As a further technical solution of the utility model, the inner surface of the all-ceramic restoration is also provided with a groove retention shape, and the groove retention shape includes an axial groove retention shape and a cutting groove retention shape.

[0015] As a further technical solution of the utility model, the axial groove retention shape is symmetrical and parallel, and the depth is 0.6-1.5mm.

[0016] As a further technical solution of the utility model, the depth of the groove retention shape is 0.5 to 1 mm.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] 1. The utility model realizes the retention between the all-ceramic crown restoration, the porcelain veneer restoration and the tooth by setting an inverted cone-shaped repositioning micro-retention shape, so as to improve the retention force of the all-ceramic restoration in the short crown restoration and prevent it from falling off. At the same time, when the amount of prepared tooth is very small or not prepared and the porcelain veneer is thin, the inverted cone-shaped repositioning micro-retention shape can accurately position the all-ceramic restoration to the target position when bonding, ensuring the accurate positioning of the restoration, playing a role of repositioning during bonding, and further effectively improving its bonding retention force.

[0019] 2. The utility model provides surface textures on the surface of the repositioning micro-retention shape and / or the nail hole retention shape. The surface textures include serrations and threads. The retention force can be further increased by providing the surface textures.

[0020] 3. The utility model can flexibly design auxiliary retention shapes according to the tooth conditions. On the basis of setting the repositioning micro-retention shape, it can further add nail hole retention shapes and groove retention shapes as needed to form a composite retention shape to ensure the retention force of the all-ceramic crown restoration in the short crown restoration and avoid falling off. At the same time, it can accurately position the target position when the all-ceramic restoration is bonded, ensuring the accurate positioning of the restoration, playing a role of repositioning during bonding, and further effectively improving its bonding retention force.

[0021] 4. The utility model uses three-dimensional printing technology to manufacture an all-ceramic restoration with an auxiliary retention shape, which overcomes the problem of insufficient precision of the traditional cutting-molded all-ceramic auxiliary retention shape and can achieve the replication of the precise structure of the tooth auxiliary retention shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0023] Figure 1 It is a cross-sectional schematic diagram of the posterior teeth after bonding with the all-ceramic crown restoration containing the repositioning micro-retention shape;

[0024] Figure 2 It is a schematic diagram of the structure after bonding the front teeth to the porcelain veneer restoration containing the repositioning micro-retention shape;

[0025] Figure 3 It is a cross-sectional schematic diagram of the posterior teeth after bonding with the all-ceramic crown restoration with nail hole retention;

[0026] Figure 4 It is a schematic diagram of the structure after bonding the posterior teeth to the all-ceramic crown restoration with a nail hole retention shape;

[0027] Figure 5 This is a schematic diagram of the structure of the anterior tooth after preparation of the nail hole retention shape (i.e. before bonding);

[0028] Figure 6 This is the side view of the posterior teeth after bonding with the all-ceramic crown restoration with axial groove retention;

[0029] Figure 7 A schematic diagram of the structure of the axial groove retention shape symmetrically set on the mesiodistal plane of the posterior teeth;

[0030] Figure 8 A schematic diagram of a structure in which an axial groove retention shape is symmetrically arranged on the buccal and lingual surfaces of posterior teeth;

[0031] Fig. 9 It is a cross-sectional schematic diagram of simultaneously setting an axial groove retention shape and an incisal groove retention shape on anterior teeth;

[0032] Marks and corresponding parts names in the attached drawings:

[0033] 1-all-ceramic crown restoration, 2-tooth preparation shoulder, 3-nail hole retention shape, 4-surface texture, 5-axial groove retention shape, 6-cutting groove retention shape, 7-porcelain veneer restoration outer surface, 8-porcelain veneer restoration inner surface, 9-repositioning micro-retention shape, 10-tooth. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0035] Example 1

[0036] This embodiment 1 provides a three-dimensional printed all-ceramic restoration with a repositioning function, such as Figure 1 , 2 As shown, the all-ceramic restoration is bonded to the tooth 10, and the inner surface of the all-ceramic restoration is provided with a raised repositioning micro-retention shape 9, and the tooth 10 is provided with a concave structure that cooperates with the repositioning micro-retention shape 9, and the repositioning micro-retention shape 9 is in an inverted cone shape, and the repositioning micro-retention shape 9 decreases in diameter from the all-ceramic restoration to the tooth 10 in a uniform gradient.

[0037] The all-ceramic restoration includes an all-ceramic crown restoration 1 and a ceramic veneer restoration, such as Figure 1 As shown, a posterior tooth bonding all-ceramic crown restoration 1 is shown, and a repositioning micro-retention shape 9 is provided on the inner surface of the all-ceramic crown restoration 1, and its size and shape match the concave structure provided on the posterior tooth body 10, as shown in FIG. Figure 2As shown, a porcelain veneer restoration bonded to an anterior tooth is provided, the porcelain veneer restoration having an inner surface 8 of the porcelain veneer restoration and an outer surface 7 of the porcelain veneer restoration, the repositioning micro-retention shape 9 being arranged on the inner surface 8 of the porcelain veneer restoration, and the position of the repositioning micro-retention shape 9 being arranged at the labial cut 1 / 3 area and the middle 1 / 3 area of ​​the anterior tooth body 10, preferably being arranged at the junction of the labial cut 1 / 3 and the middle 1 / 3 of the anterior tooth body 10.

[0038] The number of the repositioning micro-retention shape 9 is at least one, the diameter of the end close to the all-ceramic restoration is 0.6-2mm, the diameter of the end close to the tooth body 10 is 0.3-1mm, and the depth is 1-2mm.

[0039] The utility model realizes the retention between the all-ceramic crown restoration 1, the porcelain veneer restoration and the tooth 10 by setting an inverted cone-shaped repositioning micro-retention shape 9, so as to improve the retention force of the all-ceramic restoration in the short crown restoration and prevent it from falling off. At the same time, when the prepared tooth 10 is very small or not prepared and the manufactured porcelain veneer is thin, the inverted cone-shaped repositioning micro-retention shape 9 can accurately position the all-ceramic restoration to the target position when the all-ceramic restoration is bonded, ensuring the accurate positioning of the restoration, playing a role of repositioning during bonding, and further effectively improving its bonding retention force.

[0040] It should be noted that the utility model is suitable for clinical short crown restoration and porcelain veneer restoration positioning, including anterior teeth and posterior teeth. The specific setting position of each retention shape needs to be determined according to the situation. The manufacturing method of the all-ceramic restoration includes but is not limited to photocuring additive manufacturing, inkjet additive manufacturing, and is made by three-dimensional printing. The all-ceramic restoration material includes but is not limited to zirconium oxide, lithium disilicate reinforced glass ceramics and other all-ceramic materials.

[0041] Example 2

[0042] This embodiment further illustrates the all-ceramic restoration with nail hole retention shape 3.

[0043] The inner surface of the all-ceramic restoration is also provided with a nail hole retention shape 3.

[0044] like Figure 3 , 4 As shown, a full-ceramic crown restoration 1 is bonded to the posterior teeth, and the full-ceramic crown restoration 1 is bonded to the posterior tooth body 10, and is completely in close contact with the tooth body 10 through the prepared shoulder 2 of the tooth body 10, and a raised nail hole retention shape 3 is provided on the inner surface of the full-ceramic restoration, and the position of the nail hole retention shape 3 is set at the cusp groove of the posterior teeth, and a concave structure matching the size and shape of the nail hole retention shape 3 is provided at the groove of the posterior tooth body 10, and at least one nail hole retention shape 3 is provided, which is cylindrical in shape, with a diameter set to 0.6-2mm and a depth of 0.6-2mm.

[0045] like Figure 5 As shown, it is a schematic diagram of the structure of the anterior tooth nail hole retention shape after preparation (i.e. before bonding), the position of the nail hole retention shape 3 is set at the deep part of the lingual fossa, the lingual incisal ridge, and the junction of the mesiodistal marginal ridge, and there is at least one nail hole retention shape.

[0046] The surface of the repositioning micro-retention shape 9 and / or the nail hole retention shape 3 is provided with surface texture 4, and the surface texture 4 includes serrations and threads. When the surface texture 4 is not provided, the surface is a smooth surface. By providing the surface texture 4, the retention force can be further increased.

[0047] Example 3

[0048] This embodiment further illustrates an all-ceramic restoration with a groove retention shape.

[0049] The inner surface of the all-ceramic restoration is also provided with groove retention shapes, which include axial groove retention shapes 5 and cutting groove retention shapes 6.

[0050] like Figure 6-8 As shown, the arrangement of the axial groove retention shape 5 needs to be symmetrical and parallel to each other, consistent with the direction of the placement path, and the posterior teeth can be on the buccal and lingual surfaces ( Figure 8 ) or in the mesiodistal aspect ( Figure 7 ) The axial groove retention shape 5 is symmetrically arranged. The anterior teeth can be symmetrically arranged in the mesiodistal plane. The setting depth of the axial groove retention shape 5 is 0.6 to 1.5 mm, and the end of the axial groove retention shape 5 is at least 0.5 mm away from the gingival edge.

[0051] like Fig. 9 As shown, in order to further improve the retention effect, a groove retention shape 6 may be further provided, and the depth of the groove retention shape 6 is 0.5 to 1 mm.

[0052] Finally, it should be noted that in specific applications, the auxiliary retention shape can be flexibly designed according to the situation. On the basis of setting the repositioning micro-retention shape 9, the nail hole retention shape 3 and the groove retention shape can be further added as needed. The number of each retention shape can be adjusted according to actual needs to form a composite retention shape to ensure the retention force of the all-ceramic crown restoration 1 in the short crown restoration and avoid falling off. At the same time, it can be accurately positioned to the target position when the all-ceramic restoration is bonded, ensuring the accurate positioning of the restoration, playing a role of repositioning during bonding, and further effectively improving its bonding retention force.

[0053] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A three-dimensionally printed all-ceramic restoration with a repositioning function, wherein the all-ceramic restoration is bonded to a tooth (10), characterized in that: The inner surface of the all-ceramic restoration is provided with a raised repositioning micro-retention shape (9), and the tooth body (10) is provided with a concave structure that cooperates with the repositioning micro-retention shape (9). The repositioning micro-retention shape (9) is in an inverted cone shape, and the repositioning micro-retention shape (9) decreases in diameter in a uniform gradient from the all-ceramic restoration to the tooth body (10).

2. A three-dimensional printed all-ceramic restoration with repositioning function according to claim 1, characterized in that: The all-ceramic restoration comprises an all-ceramic crown restoration (1) and a ceramic veneer restoration.

3. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 1, characterized in that: The diameter of the repositioning micro-retention shape (9) close to the all-ceramic restoration is 0.6-2 mm, the diameter of the repositioning micro-retention shape (9) close to the tooth (10) is 0.3-1 mm, and the depth is 1-2 mm.

4. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 1, characterized in that: The inner surface of the all-ceramic restoration is also provided with a nail hole retention shape (3), and the nail hole retention shape (3) is cylindrical.

5. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 4, characterized in that: The diameter of the nail hole retention shape (3) is set to 0.6-2 mm, and the depth is 0.6-2 mm.

6. A three-dimensionally printed all-ceramic restoration with repositioning function according to any one of claims 1 to 5, characterized in that: The surface of the repositioning micro-retention shape (9) and / or the nail hole retention shape (3) is provided with surface textures (4).

7. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 6, characterized in that: The surface texture (4) includes serrations and threads.

8. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 1, characterized in that: The inner surface of the all-ceramic restoration is also provided with a groove retention shape, and the groove retention shape includes an axial groove retention shape (5) and a cutting groove retention shape (6).

9. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 8, characterized in that: The axial groove retaining shapes (5) are symmetrically and parallelly arranged, and have a depth of 0.6-1.5 mm.

10. The three-dimensionally printed all-ceramic restoration with repositioning function according to claim 8, characterized in that: The depth of the groove retention shape (6) is 0.5 to 1 mm.

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