Additive manufacturing zirconium oxide Maryland bridge with tree frog bionic structure

Abstract

The utility model belongs to the field of Maryland bridges, and relates to a frog bionic structure additive manufacturing zirconium oxide Maryland bridge, which comprises a Maryland bridge and a plurality of teeth, false teeth are bonded in the middle of the teeth through the Maryland bridge, and a frog bionic structure is arranged on the contact surface of the Maryland bridge and the teeth. Cylindrical holes distributed in a rectangular array are formed in the tree frog bionic structure, and an auxiliary supporting assembly is mounted in the false tooth; through the structural design of the Maryland bridge, a tree frog bionic structure is adopted, the surface roughness of the bonding surface is increased, the bonding reliability is improved, 3d printing is adopted for one-time forming, the working procedure is simplified, waste is reduced, a green and reliable manufacturing mode is formed, and the problems that the Maryland bridge is poor in bonding performance and poor in bonding performance are solved. The existing Maryland bridge is easy to fall off when hard objects are chewed, the service life of the Maryland bridge is influenced, and meanwhile, the use of the Maryland bridge is limited due to the disadvantage.

Description

Technical Field

[0001] The utility model relates to the field of Maryland bridges, in particular to a tree frog bionic structure additively manufactured zirconia Maryland bridge. Background Art

[0002] As a dental restoration technique, Maryland bridges offer unique advantages. They rarely require natural tooth extractions and don't require the removal of healthy teeth surrounding the missing tooth, making them widely applicable. However, Maryland bridges are bonded to the teeth and can easily fall off if biting forces are too strong. Improving the bonding properties of Maryland bridges is crucial.

[0003] After searching, the utility model patent with Chinese patent number CN202322734660.X discloses a minimally invasive repair adhesive-retained Maryland bridge for dentures, specifically a minimally invasive repair adhesive-retained Maryland bridge for dentures, comprising a bridge body, connecting plates fixedly installed on both sides of the bridge body, movable grooves are opened inside the two connecting plates, and the two movable grooves have rotating rods movably connected to the bearings inside the two movable grooves. The ends of the two rotating rods away from the bridge body are provided with connecting mechanisms. By fixing the connecting plates at both ends of the bridge body and movably connecting the rotating rods with bearings on the surfaces of the connecting plates, when the labial and palatal side wings are installed, they can be moved by the rotating rods, thereby facilitating bonding to the teeth.

[0004] Due to the poor bonding performance of the current Maryland bridge, it is easy to fall off when chewing hard objects, which affects its service life. At the same time, this shortcoming also limits the use of the Maryland bridge. Therefore, to address the above problems, a tree frog bionic structure additively manufactured zirconia Maryland bridge is proposed. Utility Model Content

[0005] The purpose of this solution is to solve the problem that the current Maryland bridge has poor bonding properties and is prone to falling off when chewing hard objects, which affects its service life. At the same time, this shortcoming also limits the use of the Maryland bridge. The utility model proposes a tree frog bionic structure additively manufactured zirconia Maryland bridge.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a tree frog bionic structure additively manufactured zirconia Maryland bridge, including a Maryland bridge and a plurality of teeth, the Maryland bridge is provided with dentures, the contact surface between the Maryland bridge and the teeth is provided with a tree frog bionic structure, the tree frog bionic structure is provided with cylindrical holes distributed in a rectangular array, and an auxiliary support component is installed inside the dentures.

[0007] Preferably, the auxiliary support assembly includes a push rod and a support rod, the push rod is slidably connected to the denture, a plurality of limiting cones are provided in the middle of the push rod, the limiting cones are slidably sleeved with the denture, the support rod is in contact with the limiting cones, a push plate is fixedly connected to the side of the support rod away from the denture, the support rod is slidably sleeved with the denture, and the push plate is in contact with the teeth.

[0008] Preferably, the denture is provided with a first sliding groove matched with the push rod and the limiting circular table and a second sliding groove matched with the support rod and the push plate.

[0009] Preferably, the outer side of the push plate is polished into a rough surface.

[0010] Preferably, the upper side of a section of the support rod close to the limiting cone is an inclined surface and the lower side is a straight surface.

[0011] Preferably, the diameter of the circular holes is 250 μm, the depth of the circular holes is 100 μm, the distance between the circular holes is 100 μm, and irregular scale-like patterns are loaded on the bonding surface of the circular holes.

[0012] Preferably, the surface of the Maryland bridge opposite to the contact surface with the teeth is a smooth surface.

[0013] Preferably, the Maryland bridge is bonded to the teeth using resin cement.

[0014] The utility model is beneficial in that:

[0015] 1. This utility model adopts a tree frog-inspired structure through the structural design of the Maryland bridge, increases the surface roughness of the bonding surface, improves the reliability of the bonding, and adopts 3D printing in one step, which simplifies the process and reduces waste. It is a green and reliable manufacturing method. It solves the problem of poor bonding performance of the Maryland bridge, which easily causes it to fall off when chewing hard objects, shortening its service life. At the same time, this shortcoming also limits the use of the Maryland bridge.

[0016] 2. The present invention adopts the structural design of the auxiliary support assembly. After the Maryland bridge and dentures are installed, the push rod is pressed into the denture by a tool. The limit cone on the push rod contacts the support rod and extends outward, pushing the push plate to contact the opposite side of the good tooth. Since the contact surface between the push plate and the tooth is roughened, the friction between the push plate and the tooth can be increased, thereby increasing the friction between the denture and the teeth, which plays a certain supporting effect on the denture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a structural diagram of a tree frog bionic structure additively manufactured zirconia Maryland bridge of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the denture of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the denture of the present invention;

[0021] Figure 4 Schematic top view of the scanning electron microscope image of the gravure surface of the present invention;

[0022] Figure 5 This is the electronic diagram of the scanning mirror on the gravure surface of the utility model;

[0023] Figure 6 This is a production flow chart of the Maryland Bridge of the present invention.

[0024] In the figure: 1. tooth; 2. cylindrical hole; 3. denture; 301. first slide; 302. second slide; 4. Maryland bridge; 5. auxiliary support assembly; 501. push rod; 502. limiting circular table; 503. support rod; 504. push plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The following is combined with Figure 1 —2 provide further details of this application,

[0027] The present application discloses a tree frog bionic structure additively manufactured zirconia Maryland bridge. Figure 1 and Figure 2A Maryland bridge with composite functions includes a Maryland bridge 4 and multiple teeth 1. The Maryland bridge 4 is provided with dentures 3. The contact surface between the Maryland bridge 4 and the teeth 1 is provided with a tree frog bionic structure. The tree frog bionic structure is provided with cylindrical holes 2 distributed in a rectangular array. An auxiliary support component 5 is installed inside the denture 3.

[0028] Reference Figure 2 The auxiliary support assembly 5 includes a push rod 501 and a support rod 503, the push rod 501 is slidably connected to the denture 3, a plurality of limiting round platforms 502 are provided in the middle of the push rod 501, the limiting round platforms 502 are slidably sleeved with the denture 3, the support rod 503 contacts the limiting round platforms 502, and the support rod 503 is fixedly connected to a push plate 504 on the side away from the denture 3, the support rod 503 is slidably sleeved with the denture 3, and the push plate 504 contacts the tooth 1. The denture 3 is provided with a first slide groove 301 matching the push rod 501 and the limiting round platform 502 and a second slide groove 302 matching the support rod 503 and the push plate 504, the outer side of the push plate 504 is polished into a rough surface, and the upper side of the end of the support rod 503 close to the limiting round platform 502 is an inclined surface and the lower side is a straight surface;

[0029] After the Maryland bridge 4 and the denture 3 are installed, the push rod 501 is pressed into the interior of the denture 3 by a tool, and the limiting round platform 502 on the push rod 501 contacts the support rod 503 and extends outward, pushing the push plate 504 to contact the opposite side of the good tooth 1. The linear distance that the limiting round platform 502 pushes the support rod 503 can be set to 0.1-0.4 mm, which can be printed by 3D printing technology. The push plate 504 does not fully extend out of the denture 3. Since the contact surface between the push plate 504 and the tooth 1 is rough, the friction between the push plate 504 and the tooth 1 can be increased, thereby increasing the friction between the denture 3 and the tooth 1, which has a certain supporting effect on the denture 3. After being fully pressed, the straight surface of the limiting round platform 502 contacts the support rod 503, which will not cause the push rod 501 to move upward. At this time, the gap between the first slide groove 301 and the second slide groove 302 is blocked by the resin cement to prevent saliva or other objects from entering.

[0030] Reference Figure 1 、 Figure 3 、 Figure 4 ,as well as Figure 5 As shown, the diameter of the circular hole 2 is 250 μm, the depth of the circular hole is 100 μm, the distance between the circular holes is 100 μm, the bonding surface of the circular hole is loaded with irregular scale-like patterns, the surface opposite to the contact surface of the Maryland bridge 4 and the tooth is a smooth surface, and the Maryland bridge 4 and the tooth 1 are bonded with resin cement;

[0031] CAD design software was used to design a tree frog bionic structure on the bonding surface between tooth 1 and Maryland bridge 4. The tree frog bionic structure uses cylindrical holes 2 to form a regular array. The cylindrical holes 2 are designed on the bonding surface between tooth 1 and Maryland bridge 4. The diameter of the circular holes is 250 microns, the depth of the circular holes is 100 microns, and the distance between the circular holes is 100 microns. Then, irregular scale-like patterns are loaded on the bonding surface with the arrayed circular holes, so that the surface roughness of the originally smooth surface of Maryland bridge 4 is 1.6-2.5. The cylindrical holes 2 of the tree frog bionic structure are equidistant and neatly arranged on the bonding surface of Maryland bridge 4 and tooth 1. The bonding surface of non-Maryland bridge 4 and tooth 1 is not designed with tree frogs. The back of the Maryland Bridge 4 is smooth. The Maryland Bridge 4 with the tree frog bionic structure adopts an integrated design and is printed using 3D inkjet additive manufacturing. It can be personalized according to the different patients. The side with the tree frog bionic structure is placed in the front, and the side of the Maryland Bridge 4 without the tree frog bionic structure, that is, the smooth side, is placed on the back. The two Maryland Bridges 4 are placed side by side, and the printing walls on both sides of the Maryland Bridge 4 are 0.68mm higher than the highest point of the two Maryland Bridges 4. The 3D printer sprays zirconia model ink and support ink during the additive manufacturing process, and prints layer by layer according to the slicing software until the part is formed. Subsequently, subsequent hydrolysis to support, dyeing and sintering and other back-end processes are carried out until the part is shipped.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A tree frog bionic structure additively manufactured zirconia Maryland bridge, characterized by: The invention comprises a Maryland bridge (4) and a plurality of teeth (1), wherein the Maryland bridge (4) is provided with dentures (3), a tree frog bionic structure is provided on the contact surface between the Maryland bridge (4) and the teeth (1), the tree frog bionic structure is provided with cylindrical holes (2) distributed in a rectangular array, and an auxiliary support component (5) is installed inside the dentures (3).

2. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 1, characterized in that: The auxiliary support assembly (5) comprises a push rod (501) and a support rod (503), wherein the push rod (501) is slidably connected to the denture (3), a plurality of limiting cones (502) are provided in the middle of the push rod (501), the limiting cones (502) are slidably sleeved with the denture (3), the support rod (503) is in contact with the limiting cones (502), a push plate (504) is fixedly connected to the side of the support rod (503) away from the denture (3), the support rod (503) is slidably sleeved with the denture (3), and the push plate (504) is in contact with the tooth (1).

3. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 2, characterized in that: The denture (3) is provided with a first sliding groove (301) matched with the push rod (501) and the limiting circular table (502) and a second sliding groove (302) matched with the support rod (503) and the push plate (504).

4. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 3, characterized in that: The outer side of the push plate (504) is polished to a rough surface.

5. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 3, characterized in that: The upper side of the support rod (503) close to the limiting truncated cone (502) is an inclined surface, and the lower side is a straight surface.

6. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 1, characterized in that: The diameter of the circular hole in (2) is 250 μm, the depth of the circular hole is 100 μm, the distance between the circular holes is 100 μm, and irregular scale-like patterns are loaded on the bonding surface of the circular hole.

7. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 1, characterized in that: The surface of the Maryland bridge (4) opposite to the contact surface with the teeth is a smooth surface.

8. The tree frog bionic structure additively manufactured zirconia Maryland bridge according to claim 7, characterized in that: The Maryland bridge (4) and the tooth (1) are bonded with resin cement.

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