A crown bridge restoration

Abstract

The application discloses a crown-bridge prosthesis, which comprises a bridge body and two retention crowns, the bridge body is arranged between the two retention crowns, the top of each retention crown is provided with a retention groove, the front surface of each retention crown is provided with a positioning channel, the top of the positioning channel is throughly arranged, the positioning channel is communicated with the retention groove, an adapter is arranged in the retention groove, the front surface of the adapter is provided with a through hole, a center block is arranged in the through hole, the outer wall of the center block is provided with a clamping groove, the center block is movably clamped in the positioning channel, and a plurality of spring telescopic structures are uniformly arranged on the outer wall of the center block in a ring shape. The crown-bridge prosthesis is connected with abutments or implant abutments through the retention crowns. When a patient chews, the occlusal force is first applied to the bridge body, the force is transmitted to the center block of the adapter through the retention protrusions on the two sides of the bridge body, when the occlusal force is applied, the spring telescopic structures can absorb part of the force, reduce the impact on the natural teeth and the implant, disperse the stress, and avoid stress concentration.

Description

Technical Field

[0001] This invention relates to the field of oral medical technology, and in particular to a crown and bridge restoration. Background Technology

[0002] In the field of prosthodontics, fixed crown and bridge restoration is a common method of restoration after tooth loss. Traditional fixed crown and bridge restoration mainly relies on the adjacent teeth in front of and behind the edentulous area as support. It is necessary to grind down the adjacent teeth to form the abutment teeth of the crown and bridge restoration. The part located in the edentulous area is called the bridge body.

[0003] In recent years, the development of implant technology has provided new options for tooth loss restoration. Implants are rigidly integrated with alveolar bone, resulting in good stability. However, when implants and natural teeth jointly support crown and bridge restorations, the natural teeth are connected to the alveolar bone through the periodontal ligament, exhibiting physiological mobility (approximately 25-100 μm), while the implant mobility is only 3-5 μm. This significant difference in mobility can lead to stress concentration, causing alveolar bone resorption around the implant or fracture of the crown and bridge restoration, thus affecting the restoration effect and lifespan. Therefore, this invention proposes a crown and bridge restoration to address the above problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a crown and bridge restoration.

[0005] To achieve the above objectives, the present invention provides a crown-bridge restoration comprising a bridge body and retention crowns. Two retention crowns are provided, and the bridge body is disposed between the two retention crowns. A retention groove is formed at the top of each retention crown, and a placement channel is formed on the front of each retention crown. The top of the placement channel extends through the channel and communicates with the retention groove. A connector is inserted into the retention groove. A through hole is formed on the front of the connector, and a central block is disposed within the through hole. A retaining groove is formed on the outer wall of the central block, allowing the central block to be movably engaged within the placement channel. A plurality of spring-loaded telescopic structures are rotatably arranged in a ring around the outer wall of the central block. The side of the spring-loaded telescopic structure away from the central block is rotatably disposed on the inner wall of the through hole. Retention protrusions are fixedly provided on both sides of the bridge body, and the retention protrusions are engaged within the retaining grooves.

[0006] Furthermore, the bottom of the retention crown is provided with a sleeve groove, one of the retention crowns is sleeved and installed on the abutment tooth, and the other retention crown is sleeved and installed on the implant abutment.

[0007] Furthermore, vertical grooves are provided on both inner sides of the retaining crown, the retaining grooves are connected to the vertical grooves, a buffer pad is fixedly provided on the inner wall of the vertical groove, and a stop block is fixedly provided on the outer side of the buffer pad, the thickness of the stop block gradually increases from top to bottom.

[0008] Furthermore, the spring telescopic structure includes two rotating balls, one of which is rotatably disposed inside the through hole and the other is rotatably disposed outside the center block. A bidirectional telescopic rod is fixedly disposed between the two rotating balls, and a spring is sleeved on the bidirectional telescopic rod. The two ends of the spring are fixedly connected to the two rotating balls respectively.

[0009] Furthermore, the bidirectional telescopic rod includes two fixed rods, which are respectively fixedly connected to the rotating ball. The two fixed rods are respectively provided with longitudinal grooves on opposite sides, and a movable rod is movably inserted between the two grooves.

[0010] Furthermore, a limiting groove is formed at the upper and lower ends of the central block, and the limiting groove communicates with the slot. A groove is formed at the top and bottom of the fixing protrusion. A limiting block is movably arranged at the upper end of the groove, and a buffer block is fixedly arranged at the bottom of the groove. The top of the buffer block is fixedly connected to the limiting block, and the limiting block is snapped into the limiting groove.

[0011] Furthermore, the limiting block includes a first block and a second block, which are fixedly connected. The cross-section of the first block is rectangular, and the longitudinal section of the second block is a right-angled triangle. The right-angled side of the second block is fixedly connected to the first block, and the bottoms of the first block and the second block are flush.

[0012] Furthermore, a first telescopic column is fixedly installed inside the rod groove, and the telescopic end of the first telescopic column is fixedly connected to the movable rod. A second telescopic rod is fixedly installed on both sides of the bottom of the groove, and the telescopic end of the second telescopic rod is fixedly connected to the limiting block.

[0013] Furthermore, the connector includes a base layer made of titanium alloy, with an inner anti-corrosion coating fixedly disposed on the inner side of the base layer and an outer smoothing layer fixedly disposed on the outer side of the base layer.

[0014] Furthermore, both the buffer block and the buffer pad are made of silicone material, and the outer surface of both the buffer block and the buffer pad is provided with an anti-corrosion layer. The longitudinal section of the retaining convex part is square, and the connecting body is a cubic structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The crown and bridge restoration of the present invention is connected to the abutment tooth or implant abutment through the retention crown. When the patient chews, the occlusal force is first applied to the bridge body. The bridge body transmits the force to the central block of the connector through the retention protrusions on both sides. The spring provides elastic buffer. When the occlusal force is applied, the spring extension structure can absorb part of the force, reduce the impact on the natural teeth and implants, and at the same time disperse the stress to avoid stress concentration.

[0017] 2. The present invention secures the retaining protrusions on both sides of the bridge body into the slots of the central block. The top and bottom of the retaining protrusions are provided with grooves, and buffer blocks and limiting blocks are provided in the grooves. The limiting block includes a first block and a second block. Its shape design allows the limiting block to enter the slot along with the retaining protrusion. When the retaining protrusion is engaged in the slot, the limiting block can be engaged in the limiting groove of the central block under the action of the restoring force of the buffer block, thereby firmly fixing the retaining protrusion in the slot and preventing the retaining protrusion from falling out of the slot.

[0018] 3. The connector of the present invention is installed in the retention crown through the retention groove and the placement channel. Vertical grooves are opened on both sides of the inner side of the retention crown. Buffer pads and abutments are provided in the vertical grooves. The buffer pads are made of silicone. During the process of the connector being inserted into the retention groove, the connector squeezes the abutments on both sides. Since the thickness of the abutments gradually increases from top to bottom, under the buffering force of the buffer pads, the two abutments can stably hold the connector in the retention groove, ensuring the stability of the entire restoration.

[0019] 4. The connector of the present invention is composed of a base layer, which is made of titanium alloy, giving the connector high strength. The outer smooth layer helps to reduce friction and facilitates the connector to be inserted into the retaining groove. The inner anti-corrosion coating improves the anti-corrosion performance of the inner side of the connector.

[0020] 5. The present invention uses a first block and a second block. The first block has a rectangular cross-section and the second block has a right-angled triangular cross-section. The first block does not affect the insertion of the retaining protrusion into the slot. The combination of the second block and the first block allows the limiting block to be stably inserted into the slot. Attached Figure Description

[0021] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments of this invention will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is the front view provided by the present invention;

[0023] Figure 2 This is a front view of the bridge body provided by the present invention;

[0024] Figure 3 This is a side view of the fixation crown provided by the present invention;

[0025] Figure 4 This is a side sectional view of the fixation crown provided by the present invention;

[0026] Figure 5 This is a schematic diagram of the connector structure provided by the present invention;

[0027] Figure 6 This is a schematic diagram of the spring telescopic structure provided by the present invention;

[0028] Figure 7 This is a schematic diagram of the bidirectional telescopic rod structure provided by the present invention;

[0029] Figure 8 This is a cross-sectional view of the bidirectional telescopic rod provided by the present invention;

[0030] Figure 9 This is an enlarged schematic diagram of part A provided by the present invention;

[0031] Figure 10 This is a fixed convex sectional view provided by the present invention;

[0032] Figure 11 This is an enlarged schematic diagram of part B provided by the present invention;

[0033] Figure 12 This is a side view of the central block provided by the present invention;

[0034] Figure 13 This is a side sectional view of the central block provided by the present invention;

[0035] Figure 14 This is a schematic diagram of the internal structure of the connector provided by the present invention;

[0036] Figure 15 This is a three-dimensional view of the fixation crown provided by the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Retention crown; 2. Abutment tooth; 3. Implant abutment; 4. Bridge body; 5. Central block; 6. Retention protrusion; 7. Retention groove; 8. Connector; 81. Outer smooth layer; 82. Base layer; 83. Inner anti-corrosion coating; 9. Sleeve; 10. Buffer pad; 11. Abutment block; 12. Vertical groove; 13. Placement path; 14. Through hole; 15. Buffer block; 16. Slot; 17. Spring telescopic structure; 171. Rotating ball; 172. Fixed rod; 173. Movable rod; 174. Spring; 18. Rod groove; 19. First telescopic post; 20. Limiting groove; 21. Limiting block; 211. First block; 212. Second block; 22. Second telescopic rod; 23. Groove. Detailed Implementation

[0039] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0041] Please see Figure 1-15 A crown and bridge restoration includes a bridge body 4 and retention crowns 1. Two retention crowns 1 are provided. The bottom of the retention crown 1 is provided with a groove 9. One retention crown 1 is fitted onto the abutment tooth 2, and the other retention crown 1 is fitted onto the implant abutment 3. The bridge body 4 is located between the two retention crowns 1. The entire crown and bridge restoration is connected to the abutment tooth 2 or the implant abutment 3 through the retention crowns 1.

[0042] The top of the retaining crown 1 is provided with a retaining groove 7, and the front of the retaining crown 1 is provided with a positioning channel 13. The positioning channel 13 serves as a guide, allowing the connector 8 to enter the retaining groove 7 along a predetermined path. The top of the positioning channel 13 is through-hole and communicates with the retaining groove 7. The retaining groove 7 is used to install the connector 8. The connector 8 is inserted into the retaining groove 7 through the positioning channel 13, so that the connector 8 is firmly locked in it, thereby achieving a stable connection between the connector 8 and the retaining crown 1. The connector 8 is inserted and installed in the retaining groove 7. The connector 8 has a cubic structure and is installed in the retaining crown 1 through the retaining groove 7 and the positioning channel 13.

[0043] The front of the connector 8 has a through hole 14, and a central block 5 is provided in the through hole 14. The outer wall of the central block 5 has a slot 16. The central block 5 is movably locked in the positioning channel 13. The two sides of the bridge body 4 are respectively fixed with a retaining protrusion 6. The retaining protrusion 6 is locked in the slot 16. The longitudinal section of the retaining protrusion 6 is square, so that the retaining protrusion 6 can be stably locked in the slot 16, thereby realizing the connection between the bridge body 4 and the connector 8.

[0044] The outer wall of the central block 5 is uniformly and rotatably equipped with several spring-loaded telescopic structures 17. These spring-loaded telescopic structures 17 are used to avoid stress concentration during occlusal forces, thereby better protecting the natural teeth and implants. Specifically, when the patient chews, the occlusal force first acts on the bridge body 4, and then is transmitted to the central block 5 of the connector 8 through the retention protrusion 6. The spring-loaded telescopic structures 17 can absorb part of the occlusal force, reducing the direct impact on the natural teeth and implants. The side of the spring-loaded telescopic structure 17 furthest from the central block 5 is rotatably mounted on the inner wall of the through hole 14. The spring-loaded telescopic structure 17 includes two rotating balls 171, one of which is rotatably mounted on the inner wall of the through hole 14. Inside hole 14, another rotating ball 171 is rotatably mounted outside center block 5. A bidirectional telescopic rod is fixedly mounted between the two rotating balls 171. A spring 174 is sleeved on the bidirectional telescopic rod. The two ends of the spring 174 are fixedly connected to the two rotating balls 171 respectively. The bidirectional telescopic rod includes a fixed rod 172. There are two fixed rods 172. The two fixed rods 172 are fixedly connected to the rotating balls 171 respectively. The opposite sides of the two fixed rods 172 are respectively provided with rod grooves 18. A movable rod 173 is movably inserted between the two rod grooves 18. A first telescopic column 19 is fixedly mounted inside the rod groove 18. The telescopic end of the first telescopic column 19 is fixedly connected to the movable rod 173.

[0045] When the patient chews, the biting force is first applied to the bridge body 4. The bridge body 4 transmits the force to the central block 5 of the connector 8 through the retaining protrusions 6 on both sides. The central block 5 is connected to the inner wall of the through hole 14 through the spring telescopic structure 17. The movable rod 173 in the spring telescopic structure 17 moves in the groove 18 of the fixed rod 172. The spring 174 provides elastic buffer. When the biting force is applied, the spring telescopic structure 17 can absorb part of the force, reduce the impact on the natural teeth and implants, and at the same time disperse the stress to avoid stress concentration.

[0046] As an improvement to the above technical solution, vertical grooves 12 are provided on both sides of the inner side of the retention crown 1. The retention groove 7 is connected to the vertical groove 12. A buffer pad 10 is fixedly provided on the inner wall of the vertical groove 12. The buffer pad 10 is made of silicone material. An anti-corrosion layer is provided on the outer surface of the buffer pad 10. A stop block 11 is fixedly provided on the outer side of the buffer pad 10. The thickness of the stop block 11 gradually increases from top to bottom. During the process of the connector 8 being inserted into the retention groove 7, the connector 8 squeezes the stop blocks 11 on both sides. Since the thickness of the stop block 11 gradually increases from top to bottom, under the buffering force of the buffer pad 10, the two stop blocks 11 can stably lock the connector 8 in the retention groove 7, ensuring the stability of the entire restoration.

[0047] As an improvement to the above technical solution, limiting grooves 20 are respectively opened at the upper and lower ends of the center block 5. The limiting grooves 20 are connected to the slot 16. The top and bottom of the retaining protrusion 6 are respectively provided with grooves 23. A limiting block 21 is movably arranged at the upper end of the groove 23. The limiting block 21 includes a first block 211 and a second block 212. The first block 211 and the second block 212 are fixedly connected. The cross-section of the first block 211 is rectangular, and the longitudinal section of the second block 212 is right-angled triangular. The first block 211 does not affect the retaining protrusion 6 from entering the slot 16. The combination of the second block 212 and the first block 211 allows the limiting block 21 to be stably inserted into the slot 16, thereby realizing the connection between the retaining protrusion 6 and the center block 5.

[0048] The right-angled edge of the second block 212 is fixedly connected to the first block 211. The bottoms of the first block 211 and the second block 212 are flush. A buffer block 15 is fixedly installed at the bottom of the groove 23. The buffer block 15 is made of silicone and has an anti-corrosion layer. The top of the buffer block 15 is fixedly connected to the limiting block 21. The limiting block 21 is snapped into the limiting groove 20. The retaining protrusions 6 on both sides of the bridge body 4 are snapped into the slots 16 of the center block 5. The top of the retaining protrusions 6 The bottom is provided with a groove 23, and a buffer block 15 and a limiting block 21 are provided in the groove 23. The limiting block 21 includes a first block 211 and a second block 212. Its shape design allows the limiting block 21 to enter the slot 16 along with the retaining protrusion 6. When the retaining protrusion 6 is inserted into the slot 16, the limiting block 21 can be locked in the limiting groove 20 of the center block 5 under the action of the restoring force of the buffer block 15, thereby firmly fixing the retaining protrusion 6 in the slot 16 and preventing the retaining protrusion 6 from coming out of the slot 16.

[0049] A second telescopic rod 22 is fixedly installed on both sides of the bottom of the groove 23. The telescopic end of the second telescopic rod 22 is fixedly connected to the limiting block 21. The second telescopic rod 22 enables the limiting block 21 to move up and down stably.

[0050] As an improvement to the above technical solution, the connector 8 includes a base layer 82, which is made of titanium alloy, giving the connector 8 high strength. An inner anti-corrosion coating 83 is fixedly provided on the inner side of the base layer 82, which improves the anti-corrosion performance of the inner side of the connector 8. An outer smooth layer 81 is fixedly provided on the outer side of the base layer 82, which helps to reduce friction and facilitates the connector 8 to be inserted into the retaining groove 7.

[0051] Working principle and usage of this invention:

[0052] In use, the entire crown and bridge restoration is connected to the abutment tooth 2 or implant abutment 3 via the retention crown 1. When the patient chews, the occlusal force is first applied to the bridge body 4. The bridge body 4 transmits the force to the central block 5 of the connector 8 via the retention protrusions 6 on both sides. The central block 5 is connected to the inner wall of the through hole 14 via the spring telescopic structure 17. The movable rod 173 in the spring telescopic structure 17 moves within the groove 18 of the fixed rod 172. The spring 174 provides elastic cushioning. When the occlusal force is applied, the spring telescopic... Structure 17 can absorb some force, reducing the impact on natural teeth and implants, while dispersing stress and avoiding stress concentration. The retaining protrusions 6 on both sides of the bridge 4 are engaged in the slots 16 of the central block 5. The top and bottom of the retaining protrusions 6 are provided with grooves 23, and buffer blocks 15 and limiting blocks 21 are provided within the grooves 23. The shape design of the first block 211 and the second block 212 allows the limiting block 21 to enter the slot 16 along with the retaining protrusions 6. After the retaining protrusions 6 are engaged in the slot 16, the limiting block 21... Under the action of the restoring force, the buffer block 15 can be locked in the limiting groove 20 of the center block 5, thereby firmly fixing the retaining protrusion 6 in the slot 16 and preventing the retaining protrusion 6 from detaching from the slot 16. The connecting body 8 is installed in the retaining crown 1 through the retaining groove 7 and the positioning channel 13. Vertical grooves 12 are opened on both sides of the inner side of the retaining crown 1. The vertical grooves 12 are provided with buffer pads 10 and abutments 11. During the process of the connecting body 8 being locked into the retaining groove 7, the connecting body 8 squeezes the abutments 11 on both sides. Since the thickness of the abutments 11 is from The thickness gradually increases from top to bottom. Under the buffering force of the buffer pad 10, the two abutments 11 can stably hold the connector 8 in the retention groove 7, ensuring the stability of the entire restoration. The connector 8 is composed of a base layer 82, which is made of titanium alloy, giving the connector 8 high strength. The outer smooth layer 81 helps to reduce friction and facilitates the connector 8 to be inserted into the retention groove 7. The inner anti-corrosion coating 83 improves the anti-corrosion performance of the inner side of the connector 8.

[0053] Example: Fabrication and application of a crown and bridge restoration

[0054] I. Background and Needs

[0055] In the field of prosthodontics, traditional fixed crown and bridge restorations have limitations when patients experience tooth loss. When implants and natural teeth jointly support the restoration, the significant difference in mobility between the natural teeth and implants can easily lead to stress concentration, causing alveolar bone resorption around the implant or fracture of the restoration. Therefore, this embodiment aims to provide a crown and bridge restoration that can effectively absorb and disperse stress, reducing impact on natural teeth and implants.

[0056] II. Fabrication Process of Crown and Bridge Restorations

[0057] Fabrication of retention crowns: Two retention crowns 1 are fabricated using dental-specific materials such as zirconia ceramic or metal alloy, ensuring that their dimensions match the abutment tooth 2 and implant abutment 3; a groove 9 is machined at the bottom of the retention crown 1 for fitting onto the abutment tooth 2 or implant abutment 3; a retention groove 7 and a placement channel 13 are machined at the top of the retention crown 1, and vertical grooves 12 are machined on both inner sides, with a buffer pad 10 bonded to the inner wall of the vertical groove 12, and a stop block 11 fixedly installed on the outer side of the buffer pad 10.

[0058] Fabrication of the bridge body: Based on the shape and size of the patient's edentulous area, the bridge body 4 is fabricated using dental materials such as resin or ceramic; retention protrusions 6 are machined on both sides of the bridge body 4. The longitudinal section of the retention protrusions 6 is square to ensure that they can be stably inserted into the slot 16 of the central block 5.

[0059] Fabrication of the connector: The base layer 82 of the connector 8 is made of titanium alloy material to ensure that it has sufficient strength; the inner anti-corrosion coating 83 is coated on the inner side of the base layer 82 and the outer smooth layer 81 is coated on the outer side; a through hole 14 is machined on the front side of the connector 8 for mounting the center block 5.

[0060] Fabrication of the center block: The center block 5 is made using dental materials such as resin or ceramic, ensuring that its outer wall matches the through hole 14 of the connector 8; a groove 16 is machined on the outer wall of the center block 5 to hold the retaining protrusion 6; several spring telescopic structures 17 are evenly installed in a ring on the outer wall of the center block 5, and limiting grooves 20 are machined at the upper and lower ends.

[0061] Fabrication of the spring telescopic structure: Two rotating balls 171 are made of metal material, and a bidirectional telescopic rod is fixedly installed between the two rotating balls 171; a spring 174 is sleeved on the bidirectional telescopic rod, and the two ends of the spring 174 are fixedly connected to the two rotating balls 171 respectively; a rod groove 18 is longitudinally machined on the opposite side of the fixed rod 172, and a first telescopic column 19 is installed inside the rod groove 18, and the telescopic end of the first telescopic column 19 is fixedly connected to the movable rod 173.

[0062] Fabrication of the limiting block: The limiting block 21 is made using dental materials such as resin or ceramic, including a first block 211 and a second block 212. The first block 211 has a rectangular cross-section, and the second block 212 has a right-angled triangle longitudinal section. Grooves 23 are machined at the top and bottom of the retaining protrusion 6, and a buffer block 15 is bonded to the bottom of the groove 23. The top of the buffer block 15 is fixedly connected to the limiting block 21.

[0063] III. Installation Process of Crown and Bridge Restorations

[0064] Installation of retention crowns: Place one retention crown 1 on the abutment tooth 2 and the other retention crown 1 on the implant abutment 3, ensuring that the retention crown 1 fits tightly against the abutment tooth 2 or the implant abutment 3.

[0065] Installation of the connector: The connector 8 is installed in the retaining crown 1 through the retaining groove 7 and the positioning channel 13, ensuring that the connector 8 can be stably locked in the retaining groove 7. During the installation process, the connector 8 presses against the abutments 11 on both sides. Since the thickness of the abutments 11 gradually increases from top to bottom, under the buffering force of the buffer pad 10, the two abutments 11 can stably lock the connector 8 in the retaining groove 7.

[0066] Installation of the center block: The center block 5 is installed in the through hole 14 of the connector 8. During the installation process, the spring telescopic structure 17 can provide elastic cushioning to ensure that the center block 5 can be stably installed in the through hole 14.

[0067] Bridge body installation: The retaining protrusions 6 on both sides of the bridge body 4 are engaged in the slots 16 of the center block 5 to ensure that the retaining protrusions 6 can be stably engaged in the slots 16. During the installation process, the limiting blocks 21 in the grooves 23 at the top and bottom of the retaining protrusions 6 can enter the slots 16 along with the retaining protrusions 6. After the retaining protrusions 6 are engaged in the slots 16, the limiting blocks 21 can be engaged in the limiting grooves 20 of the center block 5 under the action of the restoring force of the buffer block 15, thereby firmly fixing the retaining protrusions 6 in the slots 16 and preventing the retaining protrusions 6 from coming out of the slots 16.

[0068] IV. Working Principle of Crown and Bridge Restorations

[0069] When the patient chews, the biting force is first applied to the bridge body 4. The bridge body 4 transmits the force to the central block 5 of the connector 8 through the retention protrusions 6 on both sides. The central block 5 is connected to the inner wall of the through hole 14 through the spring telescopic structure 17. The spring 174 provides elastic buffer. When the biting force is applied, the spring telescopic structure 17 can absorb part of the force, reduce the impact on the natural teeth and implants, and at the same time disperse the stress to avoid stress concentration.

[0070] The above description is only used to illustrate the technical solutions of the present invention, and is not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Any equivalent structural or procedural transformations made using the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A crown-bridge prosthesis, characterized by: The utility model provides a bridge (4) and the retention crown (1) including, the retention crown (1) is provided with two, the bridge (4) is arranged between two the retention crown (1), the top of retention crown (1) is provided with retention slot (7), the front of retention crown (1) is provided with just in place channel (13), the top of just in place channel (13) is through arrangement, just in place channel (13) with retention slot (7) is linked, the inside insertion of retention slot (7) is installed and is equipped with the link body (8), the front of link body (8) is provided with through -hole (14), the inside of through -hole (14) is provided with center block (5), the outer wall of center block (5) is provided with the clamping slot (16), center block (5) is movably installed in just in place channel (13), the outer wall of center block (5) annularly even rotation is provided with a plurality of spring telescopic structure (17), the one side of spring telescopic structure (17) away from center block (5) rotation is provided in the inner wall of through -hole (14), the both sides of bridge (4) are respectively fixedly provided with retention convex (6), retention convex (6) is installed in clamping slot (16).

2. A crown and bridge restoration according to claim 1, wherein: The bottom of the retention crown (1) is provided with a sleeve groove (9), one of the retention crown (1) is installed on the abutment (2), and the other retention crown (1) is installed on the implant abutment (3).

3. A crown and bridge restoration according to claim 1, wherein: The inner two sides of the retention crown (1) are provided with vertical grooves (12), the retention slot (7) is communicated with the vertical grooves (12), the inner wall of the vertical groove (12) is fixedly provided with a buffer pad (10), the outer side of the buffer pad (10) is fixedly provided with a stop block (11), and the thickness of the stop block (11) gradually increases from top to bottom.

4. The crown and bridge restoration of claim 1, wherein: The spring telescopic structure (17) comprises rotating balls (171), the rotating balls (171) are provided with two, one of the rotating balls (171) is rotatably arranged on the inner side of the through-hole (14), the other rotating ball (171) is rotatably arranged on the outer side of the center block (5), two bidirectional telescopic rods are fixedly arranged between the two rotating balls (171), a spring (174) is sleeved on the bidirectional telescopic rod, and the two ends of the spring (174) are fixedly connected with the two rotating balls (171) respectively.

5. A crown and bridge restoration according to claim 4, wherein: The bidirectional telescopic rod comprises fixed rods (172), the fixed rods (172) are provided with two, the fixed rods (172) are fixedly connected with the rotating balls (171) respectively, and the opposite sides of the fixed rods (172) are respectively provided with rod grooves (18) longitudinally.

6. A crown and bridge restoration according to claim 5, wherein: The center block (5) is provided with limiting grooves (20) at the upper end and the lower end, the limiting grooves (20) are communicated with the clamping slot (16), the top and the bottom of the retention convex (6) are respectively provided with recesses (23), the limiting blocks (21) are movably arranged in the recesses (23) at the upper end, the buffer blocks (15) are fixedly arranged in the recesses (23) at the bottom, the top of the buffer block (15) is fixedly connected with the limiting block (21), and the limiting block (21) is installed in the limiting groove (20).

7. A crown and bridge restoration according to claim 6, wherein: The limiting block (21) comprises a first block (211) and a second block (212), the first block (211) and the second block (212) are fixedly connected, the first block (211) is in the shape of a rectangle in cross section, the second block (212) is in the shape of a right triangle in longitudinal section, the right angle side of the second block (212) is fixedly connected with the first block (211), and the bottom of the first block (211) and the second block (212) is flush.

8. A crown and bridge restoration according to claim 7, wherein: The inside of the rod slot (18) is fixedly provided with a first telescopic column (19), the telescopic end of the first telescopic column (19) is fixedly connected with the movable rod (173), the inside bottom of the groove (23) is fixedly provided with a second telescopic rod (22) on each side, and the telescopic end of the second telescopic rod (22) is fixedly connected with the limiting block (21).

9. The crown-bridge restoration of claim 1, wherein: The adapter (8) comprises a base layer (82), the base layer (82) is made of titanium alloy material, the inner side of the base layer (82) is fixedly provided with an inner anticorrosion coating (83), and the outer side of the base layer (82) is fixedly provided with an outer smooth layer (81).

10. The crown-bridge restoration of claim 6, wherein: The buffer block (15) and the buffer pad (10) are both made of silica gel material, the outer surfaces of the buffer block (15) and the buffer pad (10) are provided with anticorrosion layers, the retainer convex (6) is in the shape of a square in longitudinal section, and the adapter (8) is in the shape of a square.

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