A precisely fitted child deciduous tooth all-ceramic crown

Abstract

The utility model relates to a kind of children milk teeth full porcelain crown of precise fitting in the field of children oral cavity restoration, and half dissection formula tooth tip is equipped in full porcelain crown shell occlusal surface, and the gradient is close to natural milk teeth functional sharp angle, and is equipped with simulation development groove;Axial surface protrusion is designed according to milk teeth physiological data;Elliptical contact area is equipped in adjacent surface;Gingival margin area is scallop-shaped concave;External is equipped with blade-shaped edge shoulder platform, and shell line is matched with tight adhesion.According to different milk teeth position, full porcelain crown is divided into four models A / B / C / D according to size.By four model adaptation system and bionic form design, adaptation rate is significantly improved, reduces clinical polishing amount, reduces operation difficulty, shortens repair time;Half dissection formula tooth tip and bionic adjacent surface design improve mastication efficiency;Elliptical contact area reduces food jam, scallop-shaped gingival margin reduces gingivitis risk, protects periodontal health during milk teeth period;Full porcelain material characteristics make form color more close to natural milk teeth, satisfy aesthetic demand.

Description

Technical Field

[0001] This utility model relates to the field of pediatric oral restoration technology, specifically a precise-fitting all-ceramic crown for children's deciduous teeth. Background Technology

[0002] In clinical practice of pediatric deciduous tooth restoration, all-ceramic crowns are the core restoration for improving deciduous tooth defects and restoring chewing function. However, traditional pediatric deciduous tooth crowns have many technical defects and are difficult to adapt to the physiological characteristics of children's deciduous teeth. The specific problems are as follows:

[0003] Poor morphological adaptability: The cusp design of traditional deciduous tooth crowns is flat and cannot simulate the physiological angle of the functional cusp of natural deciduous teeth; the proximal surface morphology is monotonous and does not match the contact relationship with natural deciduous teeth, and cannot conform to the anatomical structure of natural teeth, which can easily lead to uneven occlusal force after restoration, and may also affect the normal eruption space of adjacent teeth; in addition, the axial surface protrusion is not designed according to the physiological data of deciduous teeth, which can easily cause abnormal pressure on the gingival tissue.

[0004] Insufficient model coverage: Only 1-2 models are available for each primary tooth position, which cannot cover the individual size differences of primary teeth in different children. In clinical application, a lot of manual grinding of the crown is required, which not only prolongs the doctor's operation time, but may also damage the integrity of the crown structure due to excessive grinding, reducing the retention and life of the restoration.

[0005] Aesthetic and functional defects: Traditional deciduous tooth crowns lack the occlusal development grooves unique to natural deciduous teeth and do not replicate the opalescent effect of natural teeth. The appearance after restoration is significantly different from that of natural deciduous teeth, making it difficult to meet the aesthetic needs of children and their parents. At the same time, unreasonable shape design may also lead to food impaction and increase the risk of gingivitis. Utility Model Content

[0006] This utility model discloses a precisely fitting all-ceramic crown for children's deciduous teeth, comprising an all-ceramic crown shell. The all-ceramic crown shell integrates a semi-anatomical cusp structure, a biomimetic proximal and gingival papilla structure, a precise fitting model system, and auxiliary fitting components. The specific structure is as follows:

[0007] Semi-anatomical cusp design: The occlusal surface of the all-ceramic crown shell is designed with semi-anatomical cusps, and the cusp inclination is optimized to be close to the functional cusp angle of natural deciduous teeth; the occlusal surface is also provided with developmental grooves, the depth of which simulates the physiological characteristics of natural deciduous teeth to ensure functional matching during occlusion; the axial surface convexity of the all-ceramic crown shell is designed according to the physiological data of deciduous teeth, which can promote the health of gingival tissue and avoid abnormal pressure on the gingiva.

[0008] Biomimetic morphology of the proximal surface and gingival papilla: The proximal surface of the all-ceramic crown shell is provided with a proximal contact area, which is physiologically elliptical, conforming to the anatomical characteristics of the small contact area and rounded shape of the proximal surface of deciduous teeth. This can ensure the normal overflow of food in the interproximal space and the smooth drainage of gingival crevicular fluid, while reserving reasonable space for the eruption of adjacent teeth; the gingival margin area of ​​the all-ceramic crown shell is provided with a gingival margin.

[0009] Preferably, the gingival margin is a scallop-shaped depression with a depth of 0.3-0.5 mm, which matches the fullness characteristics of the gingival papilla in the deciduous dentition, achieving a precise point-to-point fit with the gingival papilla.

[0010] Preferably, the outer shell of the all-ceramic crown is also provided with a marginal shoulder, which is a blade-shaped shoulder with a width controlled between 0.5-0.8mm. This avoids excessive grinding of the deciduous tooth structure and provides sufficient retention space and strength support for the all-ceramic crown. Furthermore, the marginal shoulder matches and fits snugly with the lines of the all-ceramic crown shell.

[0011] Preferably, the upper surface of the all-ceramic crown shell is provided with a groove, and the gingival margin and the adjacent surface contact area are both in contact with the groove surface;

[0012] Preferably, for each primary tooth position, the all-ceramic crown is divided into four models of size: A / B / C / D. Based on big data on children's primary tooth size, it can cover 90% of children's primary tooth size and reduce the amount of clinical grinding.

[0013] The beneficial effects of this utility model are:

[0014] Significantly improved fit rate: Through a four-model precise fitting system and biomimetic design, the fit rate of all-ceramic crowns has been improved, greatly reducing the amount of manual adjustment in clinical practice, reducing the difficulty of operation for doctors, and shortening the repair time.

[0015] Functional optimization: The semi-anatomical cusps and biomimetic proximal surface design can improve the chewing efficiency of children; the oval proximal contact area reduces food impaction, and the scallop-shaped gingival margin reduces mechanical friction and pressure on the gingival papilla, thereby reducing the risk of gingivitis and protecting the health of periodontal tissues during the primary dentition period.

[0016] Realistic appearance: The semi-anatomical cusps, the developmental grooves that mimic natural teeth, and the characteristics of all-ceramic materials make the shape and color of all-ceramic crowns closer to natural deciduous teeth, meeting aesthetic requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the longitudinal section of a precisely fitting all-ceramic crown for children's deciduous teeth according to the present invention.

[0018] Figure 2 This is a top view of a precisely fitting all-ceramic crown for children's deciduous teeth according to this utility model;

[0019] In the image: 1. All-ceramic crown shell; 2. Marginal shoulder; 3. Gingival margin; 4. Proximal contact area; 5. Groove. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] In this embodiment, refer to Figures 1-2 Specifically, a type of all-ceramic crown for children's deciduous teeth that can be precisely fitted includes an all-ceramic crown shell 1. The all-ceramic crown shell 1 integrates a semi-anatomical cusp structure, a biomimetic proximal and gingival papilla structure, a precise fitting model system, and auxiliary fitting components. The specific structure is as follows:

[0022] Semi-anatomical cusp design: The occlusal surface of the all-ceramic crown shell 1 is designed with semi-anatomical cusps, and the cusp inclination is optimized to be close to the functional cusp angle of natural deciduous teeth; the occlusal surface is also provided with developmental grooves, the depth of which simulates the physiological characteristics of natural deciduous teeth to ensure functional matching during occlusion; the axial surface convexity of the all-ceramic crown shell 1 is designed according to the physiological data of deciduous teeth, which can promote the health of gingival tissue and avoid abnormal pressure on the gingiva.

[0023] Biomimetic morphology of the proximal surface and gingival papilla: The proximal surface of the all-ceramic crown shell 1 is provided with a proximal contact area 4, which is physiologically elliptical, conforming to the anatomical characteristics of the small contact area and rounded shape of the proximal surface of deciduous teeth. This can ensure the normal overflow of food in the interproximal space and the smooth drainage of gingival crevicular fluid, while reserving reasonable space for the eruption of adjacent teeth; the gingival margin area of ​​the all-ceramic crown shell 1 is provided with a gingival margin 3.

[0024] The gingival margin 3 is a scallop-shaped depression with a depth of 0.3-0.5mm, which matches the fullness characteristics of the gingival papilla in the deciduous dentition, achieving a precise point-to-point fit with the gingival papilla.

[0025] The outer surface of the all-ceramic crown shell 1 is also provided with a marginal shoulder 2. The marginal shoulder 2 is a blade-shaped shoulder with a width controlled between 0.5-0.8mm. This avoids excessive grinding of the deciduous tooth structure and provides sufficient retention space and strength support for the all-ceramic crown. Furthermore, the marginal shoulder 2 matches and fits snugly with the lines of the all-ceramic crown shell 1.

[0026] The upper surface of the all-ceramic crown shell 1 is provided with a groove 5, and the gingival margin 3 and the adjacent surface contact area 4 are both in contact with the surface of the groove 5.

[0027] For each primary tooth position, the all-ceramic crowns are divided into four sizes: A, B, C, and D. Based on big data on children's primary tooth sizes, the crowns can cover 90% of children's primary tooth sizes, reducing the amount of clinical grinding required.

[0028] Data collection and model classification: A database of primary tooth size data of children was established by collecting a large amount of clinical data on the size of primary teeth. Based on the database, the all-ceramic crowns of each tooth position were classified into four models: A, B, C, and D, to ensure coverage of 90% of the primary tooth size of children.

[0029] Crown structure design: Based on the physiological and anatomical data of deciduous teeth, a semi-anatomical cusp is designed to determine the cusp inclination and the depth of the occlusal groove; an elliptical proximal contact area 4 and a scallop-shaped concave gingival margin 3 (concave depth 0.3-0.5mm) are designed; a blade-shaped marginal shoulder 2 is designed, and the shoulder width is controlled to be 0.5-0.8mm; a groove 5 is designed on the upper surface of the all-ceramic crown shell 1.

[0030] Crown molding: Glass-ceramic material is used as the base material for the all-ceramic crown. The all-ceramic crown shell 1 is made by casting or 3D printing technology. After molding, the all-ceramic crown is completed.

[0031] Clinical application: During clinical restoration, based on the position and size of the child's deciduous teeth, the corresponding model of all-ceramic crown is selected for trial fitting. Only minor adjustments are needed to achieve a precise fit and complete the restoration of the deciduous teeth.

[0032] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A precisely fitting all-ceramic crown for children's deciduous teeth, comprising an all-ceramic crown shell (1), characterized in that: The occlusal surface of the all-ceramic crown shell (1) is provided with semi-anatomical cusps, the inclination of which is close to the functional cusp angle of natural deciduous teeth, and the occlusal surface is also provided with developmental grooves that simulate the depth of natural deciduous teeth; the axial surface convexity of the all-ceramic crown shell (1) is designed according to the physiological data of deciduous teeth; the proximal surface of the all-ceramic crown shell (1) is provided with a proximal contact area (4), which is elliptical; the gingival margin area of ​​the all-ceramic crown shell (1) is provided with a gingival margin (3), which is a scallop-shaped depression; The outer surface of the all-ceramic crown shell (1) is also provided with a marginal shoulder (2). The marginal shoulder (2) is a blade-shaped shoulder and matches and fits the lines of the all-ceramic crown shell (1). For each deciduous tooth position, the all-ceramic crown is divided into four models A / B / C / D according to size. The scallop-shaped depression of the gingival margin (3) has a depth of 0.3-0.5mm. The upper surface of the all-ceramic crown shell (1) is provided with a groove (5). The gingival margin (3) and the proximal contact area (4) are both in contact with the surface of the groove (5).

2. The all-ceramic crown for children's deciduous teeth that can be precisely fitted according to claim 1, characterized in that: The width of the edge shoulder (2) is 0.5-0.8mm.

3. The all-ceramic crown for children's deciduous teeth that can be precisely fitted according to claim 1, characterized in that: The four types of all-ceramic crowns, A / B / C / D, are designed based on big data on children's primary tooth dimensions, covering 90% of children's primary tooth dimensions.

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