Metal porcelain tooth capable of preventing edge collapse

Abstract

The utility model discloses a prevent edge collapse porcelain metal porcelain tooth, related to metal porcelain tooth technical field, including metal tooth body and porcelain body, metal tooth body includes fixed part and movable part, and the fixed part is installed on the natural tooth, and the movable part is provided with the slot that is matched with movable part side wall shape on, and the flexible strip is fixedly connected between the edge part of fixed part and movable part, and the middle part of fixed part is inserted with the slot and is connected with the rubber pad between the groove fixedly, and the fixed part and the inner wall of groove are all smooth surface, and a plurality of weakening grooves are equidistantly seted up on the rubber pad. The utility model discloses a metal tooth body is set up as the fixed part of fixed natural tooth and the movable part that can be opposite fixed part movable, and the rubber pad of weakening groove is seted up between the both, and the pressure is transferred, when the tooth bites to the hard thing, the rubber pad will be deformed (be pressed flat), makes the porcelain body can get the buffer, has reduced the phenomenon that porcelain collapses when porcelain body suffers the hard thing obstruction suddenly.

Description

Technical Field

[0001] This utility model relates to the field of metal-ceramic crown technology, specifically to a metal-ceramic crown that prevents edge chipping. Background Technology

[0002] Porcelain-fused-to-metal crowns are a common dental restorative material, mainly used to make crowns, bridges, and other restorations. Combining the advantages of metal and porcelain, they possess high strength and excellent aesthetics, making them suitable for posterior tooth restorations and an ideal dental prosthesis. The manufacturing process involves first creating a metal base using an alloy, then covering the surface with low-melting-point porcelain powder similar in color to natural teeth. This is followed by sintering and fusing in a vacuum high-temperature porcelain furnace. This material combines the strength of metal with the aesthetics of a full porcelain crown, effectively restoring the shape and function of teeth. It features high fracture resistance, natural color, realistic appearance, smooth surface, high wear resistance, resistance to deformation, stable color, and resistance to acids and alkalis, making it a permanent restoration.

[0003] Although metal-ceramic crowns have better fracture resistance than all-ceramic crowns due to the high hardness of the metal base, the bottom edge of the porcelain crown (i.e. the edge where it connects to the metal base) is prone to chipping due to external impact, especially when biting hard objects (such as accidentally biting a stone during chewing). The stress concentration at the metal-ceramic interface can easily lead to chipping at the edge. Utility Model Content

[0004] The purpose of this invention is to provide a metal-ceramic crown that prevents edge chipping, thereby solving the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A metal-ceramic crown for preventing marginal chipping includes a metal tooth body and a porcelain body. The metal tooth body includes a fixed component and a movable component. The fixed component is installed on the natural tooth. The movable component has a slot that matches the shape of its sidewall. A flexible strip is fixedly connected between the edge of the fixed component and the movable component. The middle part of the fixed component is inserted into the slot. A rubber pad is fixedly connected between the middle part of the fixed component and the slot. The inner walls of both the fixed component and the slot are smooth surfaces. A number of weakening grooves are equidistantly formed on the rubber pad. The side of the rubber pad without weakening grooves is set as an arc surface.

[0007] By adopting the above technical solution, the metal tooth body is configured as a fixation element for fixing to the natural tooth and a relative fixation element.

[0008] The movable parts are connected by a rubber pad with a weakening groove to transmit pressure. When the teeth bite down on a hard object, the rubber pad will deform (be flattened), which can cushion the porcelain body and reduce the phenomenon of porcelain chipping when the porcelain body is suddenly obstructed by a hard object.

[0009] A further improvement of this utility model is that the center of the weakening groove end face is circular, and several radial grooves extend outward.

[0010] By adopting the above technical solution and setting a groove with a special structure of the above shape, the radial grooves maintain rigidity during the low-pressure stage (when the metal tooth is in normal use), and the overall structure provides high rigidity, so that the tooth will not move during normal chewing. Therefore, it will not affect normal use and avoid the problem of tooth (i.e., metal tooth) shaking due to the yielding of the supporting structure (rubber pad) during normal chewing. When biting a hard object to the point of reaching the critical pressure, the root of the groove undergoes local buckling, and the rigidity drops sharply, thereby allowing overall compression deformation, increasing the tooth's movement space and reducing the occurrence of porcelain chipping.

[0011] A further improvement of this utility model is that the corner of the groove away from the center of the weakening groove is set as a rounded corner.

[0012] By adopting the above technical solution and designing the end of the groove with rounded corners, stress concentration can be avoided.

[0013] A further improvement of this utility model is that: positioning buckles are fixedly connected to the inside of the slot and the middle position of the fixing member, and positioning grooves corresponding to the positioning buckles are opened at the top and bottom of the rubber pad, and the shapes of the positioning buckles and positioning grooves are matched.

[0014] By adopting the above technical solution, the relative positions between the fixing component, rubber pad and slot are more stable by setting the slot and positioning buckle, reducing the misalignment caused by the engagement process.

[0015] A further improvement of this utility model is that a rivet groove is provided on the inner edge of the fastener, and both sides of the inner wall of the rivet groove have notches.

[0016] Using the above technical solution, the metal tooth is connected to the pre-treated natural tooth through the cavity side of the fixed part. The connection process relies on a special adhesive (usually light-cured resin) to fill the cavity and bond with the natural tooth. By setting a notch, the adhesive will seep into the notch and groove when filling the cavity, thus forming a barb-like shape, which increases the "gripping" ability of the adhesive after solidification and makes the bond more stable.

[0017] A further improvement of this utility model is that a flexible edging is provided between the ceramic body and the flexible strip.

[0018] The above technical solution incorporates an edge trimming system at the edges of the ceramic body, as these are the most prone to chipping. This system directly protects the edges from external impacts and provides cushioning by using a flexible edge trimming system, thus reducing the occurrence of chipping at the edges.

[0019] A further improvement of this utility model is that the flexible strip is made of a composite material of silicone rubber and zirconium oxide, and a microporous structure is provided inside the flexible strip.

[0020] The above technical solution is adopted so that the edge part can provide adaptive movement when the moving part moves relative to the fixed part, while avoiding the edge part from becoming skewed and causing the porcelain to chip.

[0021] A further improvement of this utility model is that the side of the fixed part away from the moving part has a cavity, and the inner wall of the cavity is a rough surface.

[0022] The above technical solution addresses the issue that the installation of the fasteners relies on adhesive adhesion. If the interior of the fasteners is too smooth, the bonding strength will be affected. Therefore, the solution involves making the inner wall of the cavity rough to increase the gripping ability of the adhesive on the fasteners and improve the bonding stability.

[0023] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0024] 1. This utility model provides a metal-ceramic crown that prevents edge chipping. By setting the metal crown as a fixed part that is fixed to the natural tooth and a movable part that can move relative to the fixed part, a rubber pad with a weakening groove is set between the two to transmit pressure. When the tooth bites a hard object, the rubber pad will deform (be flattened), so that the porcelain crown can be buffered, reducing the phenomenon of porcelain chipping when the porcelain crown is suddenly obstructed by a hard object.

[0025] 2. This utility model provides a metal-ceramic crown that prevents edge chipping. By setting a groove with a columnar structure and a radial groove structure on the outside, the radial grooves maintain rigidity under low pressure (when the metal tooth is in normal use). The overall structure provides high rigidity, so the tooth will not move during normal chewing. Therefore, it will not affect normal use and avoid the problem of tooth (i.e., metal tooth) shaking due to the yielding of the supporting structure (rubber pad) during normal chewing. When biting a hard object to the point of reaching the critical pressure, the root of the groove undergoes local buckling, and the rigidity drops sharply, thereby allowing overall compression deformation, increasing the tooth's movement space and reducing the occurrence of porcelain chipping.

[0026] 3. This utility model provides a metal-ceramic crown to prevent edge chipping. The inner wall of the cavity is roughened to increase the adhesion of the adhesive to the fixing component. A notched groove is provided inside the cavity to facilitate adhesive filling.

[0027] When filling the cavity, it seeps into the rivet groove and notch, forming a barb-like shape, which increases the "gripping" ability of the adhesive after it solidifies, making the bond stronger. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 This is one of the structural schematic diagrams of the overall metal tooth body of this utility model;

[0030] Figure 2 This is the second schematic diagram of the overall structure of the metal tooth body of this utility model;

[0031] Figure 3 This is a schematic diagram of the disassembled structure of the metal tooth body of this utility model;

[0032] Figure 4 This is a schematic diagram of the structure of the rubber pad of this utility model;

[0033] Figure 5 This is a schematic diagram of the structure of the movable part and the ceramic body of this utility model;

[0034] Figure 6 This is a schematic diagram of the structure of the fastener of this utility model;

[0035] Figure 7 This utility model Figure 1 Enlarged view of point A in the middle;

[0036] Figure 8 This is a cross-sectional view of the flexible strip of this utility model;

[0037] In the diagram: 101, fastener; 102, moving part; 103, slot; 2, flexible strip; 3, ceramic body; 4, rivet groove;

[0038] 5. Notch; 6. Rubber pad; 7. Weakening groove; 8. Groove; 10. Positioning buckle; 11. Positioning groove; 12. Flexible edging;

[0039] 13. Curved surface; 14. Microporous structure. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the embodiments.

[0041] Example:

[0042] like Figure 1, Figure 2 and Figure 3 As shown, this utility model provides a metal-ceramic crown to prevent edge chipping, including a metal tooth body and a porcelain body 3; the metal tooth body includes a fixed member 101 and a movable member 102. The fixed member 101 is installed on the natural tooth, and the movable member 102 has a slot 103 that matches the shape of the side wall of the movable member 102. A flexible strip 2 is fixedly connected between the edge of the fixed member 101 and the movable member 102. The middle part of the fixed member 101 is inserted into the slot 103, and a rubber pad 6 is fixedly connected between the middle part of the fixed member 101 and the slot 103. The inner walls of the fixed member 101 and the slot 103 are both smooth surfaces. A plurality of weakening grooves 7 are equidistantly provided on the rubber pad 6, and the side of the rubber pad 6 without weakening grooves 7 is set as an arc surface 13.

[0043] In this embodiment, the metal tooth body is configured as a fixation member 101 that is fixed to the natural tooth and a relative fixation member.

[0044] The movable part 102 of the 101 movement is provided with a rubber pad 6 with a weakening groove 7 between them to transmit pressure. When the teeth bite a hard object, the rubber pad 6 will deform (be flattened), so that the porcelain body 3 can be buffered, reducing the phenomenon of porcelain chipping when the porcelain body 3 is suddenly obstructed by a hard object.

[0045] like Figure 3 and Figure 4 As shown, preferably, the center of the end face of the weakening groove 7 is circular, and several radial grooves 8 extend outward.

[0046] In this embodiment, by setting the groove with the special structure of the above shape, the radial groove 8 remains rigid during the low pressure stage (when the metal tooth is in normal use), and the overall structure provides high rigidity, so that the tooth will not move during normal chewing, thus not affecting normal use, and avoiding the problem of tooth (i.e. metal tooth) shaking due to the yielding of the support structure (rubber pad 6) during normal chewing.

[0047] When biting a hard object to the point of reaching critical pressure, local buckling occurs at the root of groove 8, and the stiffness drops sharply, thus allowing overall compression deformation to increase the space for tooth movement and reduce the occurrence of porcelain chipping.

[0048] It should be noted that the critical pressure value can be adjusted by the number and angle of the grooves (for example, increasing the number of grooves can reduce the critical pressure).

[0049] like Figure 4 As shown, preferably, the corner of the groove 8 away from the center of the weakening groove 7 is set as a rounded corner.

[0050] In this embodiment, since stress concentration usually occurs at points of abrupt change in geometry (such as sharp corners or the edges of holes), in sharp corners: the abrupt change in geometry causes the force lines to twist, and the stress increases sharply at the sharp corners. In rounded corners: the radius of curvature increases, the force lines transition smoothly, and the stress distribution becomes more uniform. Therefore, by designing the end of the groove 8 with rounded corners, stress concentration can be avoided.

[0051] like Figure 4 , Figure 5 and Figure 6 As shown, preferably, the slot 103 is fixedly connected to the middle position of the fastener 101 and the slot 103 is fixedly connected to the positioning buckle 10. The top and bottom of the rubber pad 6 are provided with positioning grooves 11 that correspond one-to-one with the positioning buckle 10. The shapes of the positioning buckle 10 and the positioning groove 11 are matched.

[0052] In this embodiment, by setting the slot 103 and the positioning buckle 10, the relative positions between the fixing member 101, the rubber pad 6 and the slot 103 are more stable, reducing the misalignment caused by the engagement process.

[0053] like Figure 1 and Figure 7 As shown, preferably, the inner edge of the fastener 101 is provided with a rivet groove 4, and both sides of the inner wall of the rivet groove 4 are provided with a notch 5.

[0054] In this embodiment, the metal tooth body is docked with the pre-treated natural tooth through the cavity side of the fixing part. The docking process relies on a special adhesive (usually light-cured resin) to fill the cavity and bond with the natural tooth. By setting a groove 4 with a notch 5, the adhesive will seep into the groove 4 and the notch 5 when filling the cavity, thereby forming a barb-like shape, which increases the "gripping" ability of the adhesive after solidification and makes the bonding more stable.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, preferably, a flexible edging 12 is provided between the ceramic body 3 and the flexible strip 2.

[0056] In this embodiment, since the edge of the ceramic body 3 is the part most prone to chipping, the solution also provides an edge banding at the edge of the ceramic body 3. On the one hand, it can directly protect the edge of the ceramic body 3 from direct external impacts. On the other hand, the flexible edge banding provides cushioning, which can reduce the occurrence of chipping at the edge.

[0057] like Figure 3 and Figure 8 As shown, preferably, the flexible strip 2 is a composite material of silicone rubber and zirconium oxide, and in the flexible strip...

[0058] 2. The interior is equipped with a microporous structure 14.

[0059] In this embodiment, the edge portion is designed to provide adaptive movement when the movable member 102 moves relative to the fixed member 101, while avoiding edge misalignment that could lead to chipping.

[0060] Preferably, the side of the fixed member 101 away from the movable member 102 has a cavity, and the inner wall of the cavity is rough.

[0061] In this embodiment, since the installation of the fastener 101 depends on the adhesion of the adhesive, if the interior of the fastener 101 is too smooth, the strength of the adhesion will be affected. Therefore, in this solution, the inner wall of the cavity is made into a rough surface to increase the gripping ability of the adhesive relative to the fastener 101 and improve the stability of the adhesion.

[0062] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A metal-ceramic crown for preventing marginal chipping, comprising a metal tooth body and a porcelain body (3); characterized in that: The metal tooth includes a fixed part (101) and a movable part (102). The fixed part (101) is installed on the natural tooth. The movable part (102) has a slot (103) that matches the shape of the side wall of the movable part (102). A flexible strip (2) is fixedly connected between the edge of the fixed part (101) and the movable part (102). The middle part of the fixed part (101) is inserted into the slot (103). A rubber pad (6) is fixedly connected between the middle part of the fixed part (101) and the slot (103). The inner walls of the fixed part (101) and the slot (103) are smooth surfaces. Several weakening grooves (7) are equidistantly provided on the rubber pad (6). The side of the rubber pad (6) without weakening grooves (7) is set as an arc surface (13). The center of the end face of the weakening groove (7) is circular and extends outward with several radial grooves (8).

2. The metal-ceramic crown for preventing marginal chipping according to claim 1, characterized in that: The corner of the groove (8) away from the center of the weakening groove (7) is set as a rounded corner.

3. A metal-ceramic crown for preventing marginal chipping according to claim 2, characterized in that: The slot (103) and the middle part of the fastener (101) are both fixedly connected with positioning buckles (10). The top and bottom of the rubber pad (6) are provided with positioning grooves (11) that correspond one-to-one with the positioning buckles (10). The shapes of the positioning buckles (10) and the positioning grooves (11) are matched.

4. A metal-ceramic crown for preventing marginal chipping according to claim 3, characterized in that: The fixed member (101) has a cavity on the side away from the movable member (102), and the inner wall of the cavity is rough.

5. A metal-ceramic crown for preventing marginal chipping according to claim 4, characterized in that: A flexible edging (12) is provided between the ceramic body (3) and the flexible strip (2).

6. A metal-ceramic crown for preventing marginal chipping according to claim 5, characterized in that: The flexible strip (2) is made of silicone rubber and zirconium oxide composite material, and a microporous structure (14) is provided inside the flexible strip (2).

7. A metal-ceramic crown for preventing marginal chipping according to claim 6, characterized in that: The inner edge of the fastener (101) is provided with a rivet groove (4), and both sides of the inner wall of the rivet groove (4) are provided with notches (5).

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