Combined type intermaxillary fixing system

Abstract

The utility model discloses a combined type intermaxillary fixing system which comprises a bone setting module used for providing support for a jaw bone, a positioning module used for positioning the bone setting module and a connecting module used for achieving intermaxillary fixing, the bone setting module is arranged on the outer side of an intermaxillary dentition, the positioning module is arranged on one side of the bone setting module, and the connecting module is arranged on the other side of the bone setting module. The utility model has the beneficial effects that the structure is simple, the operation is convenient, the operation efficiency can be effectively improved, the risk of steel wire adhesion can be reduced through the bone support design, the gomphiasis is avoided, the oral hygiene is favorably maintained, the edge of the bone support adopts an arc-shaped structure, and the bone support is convenient to use. According to the device, the comfort level of a patient can be improved, the number of anchoring points is large, anchoring stability can be guaranteed, the bone segment involution and closing stability is effectively improved, the bone setting module can be used for stretching and compressing operation, the position of a screw hole is adjusted to avoid tooth roots and nerves, universality is high, and the bone segment involution situation can be adjusted without repositioning a steel wire.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary equipment, in particular to a combined inter-maxillary fixation system. Background Art

[0002] In the prior art, intermaxillary ligation is one of the important methods for treating maxillofacial fractures. In the past, steel wire was usually used for binding. At present, dental arch splints or IMF screws are most commonly used in clinical practice, which are combined with steel wires or rubber bands to achieve intermaxillary ligation fixation to help the maxillary and / or mandibular bones to be repositioned and achieve the purpose of restoring occlusion. The dental arch splint has high strength and stable ligation, but it has the disadvantages of being time-consuming and laborious to install and remove, prone to needlestick injuries, difficult to maintain oral hygiene and gum health, and may cause ischemic necrosis of the oral mucosa and periodontal membrane, may cause tooth loss, and require secondary surgery for removal; IMF screws are simple and easy to operate, but they have the disadvantages of being prone to poor reduction and occlusal dislocation in posterior mandibular fractures, there is a potential risk of screw dislocation, and they cannot be used alone as a separate treatment structure for mandibular fractures. In addition, the existing intermaxillary ligation fixation structure cannot be changed, that is, it is a fixed structure, which usually needs to be customized according to the patient's condition, is expensive, and has poor universality. In addition, after ligation, the bone segment alignment cannot be directly improved, and the screw needs to be repositioned before the bone segment alignment can be adjusted.

[0003] The Chinese utility model patent with application number: 201820324031.6 discloses a mandibular fracture circumflex mandibular ligation and fixation device, including: two puncture needles for puncture, each of the puncture needles includes a needle head and a needle body, and there is an angle between the needle head and the needle body; a steel wire connected between the two puncture needles; the two puncture needles respectively penetrate the buccal and lingual soft tissues on both sides of the mandibular fracture to be repaired, and the steel wire is passed through the jaw plate or denture placed at the mandibular fracture to be repaired and ligated and fixed. However, this mandibular fracture circumflex mandibular ligation and fixation device is prone to needle puncture injuries, making it difficult to maintain oral hygiene and gum health, and may cause ischemic necrosis of the oral mucosa and periodontal membrane, and may cause tooth loss, requiring secondary surgery to remove the teeth, and needing to be customized according to the patient's condition, with high costs and poor universality. The steel wire needs to be repositioned before the bone segment alignment can be adjusted. Utility Model Content

[0004] The utility model aims to provide a combined intermaxillary fixation system.

[0005] In order to achieve the above purpose, the technical solution proposed by the utility model is:

[0006] A combined intermaxillary fixation system comprises a bone setting module for providing support for the jaw, a positioning module for positioning the bone setting module, and a connecting module for achieving intermaxillary fixation, wherein the bone setting module is arranged outside the intermaxillary dentition, the positioning module is configured on one side of the bone setting module, and the connecting module is assembled on a side of the bone setting module away from the positioning module.

[0007] The bone setting module includes a bone setting base plate, an anchoring screw hole and a ligation hook. The bone setting base plate is arranged on the outside of the jawbone and is arranged in close contact with the jawbone. The bone setting base plate is arranged as a corrugated plate structure and has a plurality of arc-shaped protrusion structures arranged at intervals on both sides thereof. There are a plurality of anchoring screw holes, which are evenly spaced on one side of the bone setting base plate and penetrate the bone setting base plate. There are a plurality of ligation hooks, which are evenly spaced on one side of the bone setting base plate away from the anchoring screw hole and are integrally connected to the bone setting base plate.

[0008] The anchoring screw hole is located at the arc-shaped protrusion on one side of the bone-setting base plate and a part of the anchoring screw hole protrudes from the arc-shaped protrusion of the bone-setting base plate.

[0009] The anchoring screw hole is located at the arc-shaped protrusion on one side of the bone-setting base plate and is located inside the arc-shaped protrusion of the bone-setting base plate.

[0010] The ligation hook is configured as a strip-shaped protrusion structure, and the ligation hook is located at the inner side of the arc-shaped protrusion of the bone-setting base plate.

[0011] The positioning module includes a positioning screw and a locking protrusion. There are several positioning screws, and the several positioning screws are arranged at the several anchoring screw holes and are threadedly connected to the jawbone. The locking protrusion is arranged on the side of one end of the positioning screw and is integrally formed with the positioning screw. There is a distance between the locking protrusion and the nut of the positioning screw. The diameter of the locking protrusion is larger than the diameter of the positioning screw and the side of the locking protrusion is provided with a thread. The locking protrusion is threadedly connected to the anchoring screw hole through a thread.

[0012] There are two groups of bone setting modules and two groups of positioning modules, and the two groups of bone setting modules and the two groups of positioning modules are symmetrically arranged on the outside of the upper jaw and the lower jaw.

[0013] The connection module includes a cerclage wire and an anchoring wire. The cerclage wire is provided in several groups. The groups of cerclage wire are arranged side by side between two groups of ligation hooks and are hung with the corresponding ligation hooks. The cerclage wire is arranged around the sides of two adjacent ligation hooks. The anchoring wire is provided in several groups. The groups of anchoring wire are arranged around the sides of two adjacent groups of positioning screws and are hung with the corresponding positioning screws.

[0014] The bone-setting baseplate is made of pure titanium secondary material, and the positioning screw is made of titanium alloy material.

[0015] The osteosynthesis base plate is arranged in a fit with the patient's upper jaw or lower jaw, and the anchoring screw hole and the ligation hook are arranged corresponding to the patient's gum line.

[0016] The beneficial effects of the utility model are:

[0017] It has a simple structure and is equipped with a bone setting module, a positioning module and a connection module to form a combined intermaxillary fixation system. It is easy to operate and can effectively improve the efficiency of the operation. The bone support design can reduce the risk of wire adhesion, avoid loose teeth, and help maintain oral hygiene. The arc-shaped structure is adopted at the edge to improve the patient's comfort. There are many anchoring points to ensure stable anchoring and effectively improve the stability of bone segment occlusion and closure. The bone setting module can be stretched and compressed to adjust the screw hole position to avoid the tooth root and nerve. It has strong universality and can adjust the bone segment occlusion without repositioning the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0019] Figure 2 This is a schematic structural diagram of a bone setting module in Embodiment 1 of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of a positioning module in Embodiment 1 of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the bone setting module of the second embodiment of the present utility model.

[0022] In the figure: 1. bone setting base plate; 2. anchoring screw hole; 3. ligation hook; 4. positioning screw; 5. locking protrusion; 6. cerclage wire; 7. anchoring wire. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Embodiment 1:

[0025] A combined intermaxillary fixation system includes a bone setting module for providing support for the jaw, a positioning module for positioning the bone setting module, and a connection module for achieving intermaxillary fixation. The bone setting module is arranged outside the intermaxillary dentition, the positioning module is arranged on one side of the bone setting module, and the connection module is assembled on the side of the bone setting module away from the positioning module. The overall structural schematic diagram of the first embodiment of the utility model is shown in FIG. Figure 1 shown.

[0026] The bone setting module comprises a bone setting base plate 1, an anchoring screw hole 2 and a ligation hook 3. The bone setting base plate 1 is arranged on the outside of the jawbone and is arranged in close contact with the jawbone. The bone setting base plate 1 is arranged in a corrugated plate structure and a plurality of arc-shaped convex structures are arranged at intervals on both sides thereof. A plurality of anchoring screw holes 2 are arranged evenly at intervals on one side of the bone setting base plate 1 and penetrate the bone setting base plate 1. A plurality of ligation hooks 3 are arranged evenly at intervals on one side of the bone setting base plate 1 away from the anchoring screw hole 2 and are arranged together with the bone setting base plate 1. The bone-setting module is connected by body forming, and the bone-setting base plate 1, the anchoring screw hole 2 and the ligation hook 3 cooperate to provide bone support for the jaw, wherein the bone-setting base plate 1 is used as the main part in the bone-setting structure, thereby providing bone support for the jaw through the wavy titanium plate structure, the anchoring screw hole 2 is used as the anchoring structure on the bone-setting base plate 1, thereby meeting the positioning requirements of the positioning module, and the ligation hook 3 is used as the hook structure in the bone-setting structure, thereby providing an anchor point for the cerclage wire 6. The structural schematic diagram of the bone-setting module of the first embodiment of the utility model is shown in FIG. Figure 2 shown.

[0027] The anchoring screw hole 2 is located at the arc-shaped protrusion on one side of the osteosynthesis base plate 1 and part of it protrudes from the arc-shaped protrusion of the osteosynthesis base plate 1. The ligation hook 3 is set as a strip-shaped protrusion structure, and the ligation hook 3 is located on the inner side of the arc-shaped protrusion of the osteosynthesis base plate 1. The part of the anchoring screw hole 2 protruding from the arc-shaped protrusion of the osteosynthesis base plate 1 can increase the height of the osteosynthesis module, thereby adjusting the rigid fixation strength of the osteosynthesis module to meet the intermaxillary fixation needs of patients with higher jaws.

[0028] The positioning module includes a positioning screw 4 and a locking protrusion 5. The positioning screws 4 are provided with a plurality of them. The plurality of positioning screws 4 are arranged at a plurality of anchoring screw holes 2 and are threadedly connected to the jawbone. The locking protrusion 5 is arranged on the side of one end of the positioning screw 4 and is integrally formed with the positioning screw 4. A spacing is left between the locking protrusion 5 and the nut of the positioning screw 4. The diameter of the locking protrusion 5 is larger than the diameter of the positioning screw 4 and the side of the locking protrusion 5 is provided with a thread. The locking protrusion 5 is threadedly connected to the anchoring screw hole 2 through the thread. The positioning module cooperates with the positioning screw 4 and the locking protrusion 5 to position the bone joint module, wherein the positioning screw 4 is used to fix the bone joint base plate 1 and can be used as an anchor point for the anchoring wire 7 for auxiliary fixation. The locking protrusion 5 is used as a locking connection structure on the positioning screw 4, so that the positioning screw 4 is matched and connected with the anchoring screw hole 2 to improve the stability of the fixing system. The structural schematic diagram of the positioning module of the first embodiment of the utility model is shown in FIG. Figure 3 shown.

[0029] There are two groups of bone setting modules and positioning modules, which are symmetrically arranged on the outside of the upper jaw and the lower jaw, wherein the two groups of bone setting modules and the two groups of positioning modules can fix the upper jaw and the lower jaw of the patient.

[0030] The connecting module includes a cerclage wire 6 and an anchoring wire 7. The cerclage wire 6 is provided in several groups. The groups of cerclage wires 6 are arranged side by side between two groups of ligation hooks 3 and are connected to the corresponding ligation hooks 3. The cerclage wire 6 is arranged around the sides of two adjacent ligation hooks 3. The anchoring wire 7 is provided in several groups. The groups of anchoring wires 7 are arranged around the sides of two adjacent groups of positioning screws 4 and are connected to the corresponding positioning screws 4. The connecting module cooperates with the cerclage wire 6 and the anchoring wire 7 to achieve intermaxillary fixation to restore the bite force, wherein the cerclage wire 6 is used to connect the bone setting modules on the outside of the maxilla and the mandible to achieve intermaxillary fixation, and the anchoring wire 7 is used as an auxiliary fixing structure to fix the two adjacent groups of positioning screws 4 to match the bone segments.

[0031] The bone-setting baseplate 1 is made of pure titanium grade 2 material, and the positioning screw 4 is made of titanium alloy material. The bone-setting baseplate 1 is made of pure titanium grade 2 material that meets the standard requirements, and the positioning screw 4 is made of Ti6Al7Nb titanium alloy material that meets the standard requirements.

[0032] The osteosynthesis base plate 1 is arranged to fit the patient's maxilla or mandible, and the anchoring screw hole 2 and the ligation hook 3 are arranged corresponding to the patient's gum line. The osteosynthesis base plate 1 adopts a wave-shaped design to meet the tension or compression requirements, thereby adjusting the position of the positioning screw 4 to avoid the position of the tooth root.

[0033] Embodiment 2:

[0034] On the basis of Example 1, the rest of the parts remain unchanged, and the relative position between the anchoring screw hole 2 and the bone setting base plate 1 is adjusted, that is, the anchoring screw hole 2 is located at the arc-shaped protrusion on one side of the bone setting base plate 1 and it is located on the inner side of the arc-shaped protrusion of the bone setting base plate 1, wherein the anchoring screw hole 2 is located on the inner side of the arc-shaped protrusion of the bone setting base plate 1, which can reduce the height of the bone setting module, thereby adjusting the rigid fixation strength of the bone setting module to meet the inter-maxillary fixation requirements of patients with lower jaws. The structural schematic diagram of the bone setting module of Example 2 of the utility model is shown in FIG. Figure 4 shown.

[0035] The anchor wire 7 is used as an additional anchor structure in the intermaxillary fixation system, and can be added or reduced according to actual conditions, that is, it is an optional structure.

[0036] Operation process:

[0037] Select a suitable bone base plate 1 according to the anatomical structure of the patient's upper and lower jaws to ensure that the positioning screws 4 and the ligature hooks 3 are properly positioned relative to the gum line. The height of the plate can be adjusted by manually stretching the plate horizontally. Cut the excess length of the bone base plate 1 and cut next to the anchor screw hole 2 to avoid damaging the thread of the screw hole. To ensure stability, there must be an anchor screw hole 2 at each end of the bone base plate 1. Use a file to remove burrs and sharp edges of all cutting surfaces, place the bone base plate 1 on the outside of the maxilla or mandible, and insert a positioning screw 4 of appropriate length through the bone base plate 1 at the desired anatomical position. Align the anchor screw hole 2 with the expected position of the remaining positioning screws 4, insert the remaining positioning screws 4, engage the positioning screw 4 with the osteosynthesis base plate 1, place the cerclage wire 6 at the pre-bent ligation hook 3, tighten the wire and bend it to the non-invasive position for cutting, adjust the in-plane bent ligation hook 3 to adapt to the anatomical structure and wire style, the plane of the ligation hook 3 is completely less than forty-five degrees to prevent breakage, place the anchor wire 7 on the positioning screw 4 as an additional anchor point, tighten it to help align the bone segments and obtain additional stability, after placing the anchor wire 7, fully tighten the positioning screw 4 to ensure that it is locked in the osteosynthesis base plate 1.

[0038] Working principle:

[0039] A bone-supported intermaxillary fixation system is formed by a bone-setting module, a positioning module and a connection module. The bone-setting base plate 1 adopts a wavy titanium plate structure and is fixed to the maxilla and the mandible by a positioning screw 4. The bone-setting base plate 1 can be extended and retracted along the plane to form a plastic titanium plate structure, so that the position of the anchor screw hole 2 can be accurately adjusted to avoid the root position. The distance between the positioning screw 4 and the locking protrusion 5 serves as an anchor point for the auxiliary fixation anchor wire 7. The cerclage wire 6 is arranged around the ligature hook 3 and the nail head of the positioning screw 4 to achieve intermaxillary fixation and restore the bite force.

[0040] The beneficial effects of the utility model are that the structure is simple, and a bone setting module, a positioning module and a connecting module cooperate to form a combined intermaxillary fixation system, which is easy to operate and can effectively improve the efficiency of the operation. The bone support design can reduce the risk of wire adhesion, avoid loose teeth, and is conducive to maintaining oral hygiene. The arc structure is adopted at the edge to improve the comfort of patients. There are many anchoring points to ensure stable anchoring and effectively improve the stability of bone segment alignment and closure. The bone setting module can be stretched and compressed to adjust the position of the screw hole to avoid the tooth root and nerve. It has strong universality and can adjust the alignment of the bone segments without repositioning the wire.

[0041] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A combined intermaxillary fixation system, characterized in that: It includes a bone setting module for providing support for the jaw, a positioning module for positioning the bone setting module, and a connection module for achieving inter-maxillary fixation, wherein the bone setting module is arranged outside the inter-maxillary dentition, the positioning module is arranged on one side of the bone setting module, and the connection module is assembled on the side of the bone setting module away from the positioning module; The bone setting module comprises a bone setting base plate (1), an anchoring screw hole (2) and a ligation hook (3), wherein the bone setting base plate (1) is arranged on the outside of the jawbone and is arranged in close contact with the jawbone, the bone setting base plate (1) is arranged as a corrugated plate structure and a plurality of arc-shaped protrusion structures are arranged at intervals on both sides thereof, a plurality of the anchoring screw holes (2) are arranged evenly at intervals on one side of the bone setting base plate (1) and penetrate the bone setting base plate (1), and a plurality of the ligation hooks (3) are arranged evenly at intervals on a side of the bone setting base plate (1) away from the anchoring screw hole (2) and are integrally connected to the bone setting base plate (1).

2. A combined intermaxillary fixation system according to claim 1, characterized in that: The anchoring screw hole (2) is located at the arc-shaped protrusion on one side of the bone-setting base plate (1), and a portion thereof protrudes from the arc-shaped protrusion of the bone-setting base plate (1).

3. A combined intermaxillary fixation system according to claim 1, characterized in that: The anchoring screw hole (2) is located at the arc-shaped protrusion on one side of the bone-setting base plate (1) and is located inside the arc-shaped protrusion of the bone-setting base plate (1).

4. A combined intermaxillary fixation system according to claim 2 or 3, characterized in that: The ligation hook (3) is configured as a strip-shaped protrusion structure, and the ligation hook (3) is located on the inner side of the arc-shaped protrusion of the osteosynthesis base plate (1).

5. A combined intermaxillary fixation system according to claim 4, characterized in that: The positioning module comprises a positioning screw (4) and a locking protrusion (5), wherein a plurality of the positioning screws (4) are provided, wherein the plurality of the positioning screws (4) are arranged at a plurality of the anchoring screw holes (2) and are threadedly connected to the jawbone, wherein the locking protrusion (5) is arranged at a side portion of one end of the positioning screw (4) and is integrally formed with the positioning screw (4), wherein a spacing is left between the locking protrusion (5) and the nut of the positioning screw (4), wherein the diameter of the locking protrusion (5) is greater than the diameter of the positioning screw (4) and a thread is provided on the side portion of the locking protrusion (5), and wherein the locking protrusion (5) is threadedly connected to the anchoring screw hole (2) via a thread.

6. A combined intermaxillary fixation system according to claim 5, characterized in that: There are two groups of bone setting modules and two groups of positioning modules, and the two groups of bone setting modules and the two groups of positioning modules are symmetrically arranged on the outside of the upper jaw and the lower jaw.

7. A combined intermaxillary fixation system according to claim 6, characterized in that: The connection module comprises a cerclage steel wire (6) and an anchoring steel wire (7). The cerclage steel wire (6) is provided in a plurality of groups. The plurality of groups of the cerclage steel wire (6) are arranged side by side and adjacently between two groups of the ligation hooks (3) and are hung with the corresponding ligation hooks (3). The cerclage steel wire (6) is arranged around the sides of two adjacent ligation hooks (3). The anchoring steel wire (7) is provided in a plurality of groups. The plurality of groups of the anchoring steel wire (7) are arranged around the sides of two adjacent groups of the positioning screws (4) and are hung with the corresponding positioning screws (4).

8. A combined intermaxillary fixation system according to claim 7, characterized in that: The bone fracture base plate (1) is made of pure titanium secondary material, and the positioning screw (4) is made of titanium alloy material.

9. A combined intermaxillary fixation system according to claim 8, characterized in that: The osteosynthesis base plate (1) is arranged to fit the patient's upper jaw or lower jaw, and the anchoring screw hole (2) and the ligation hook (3) are arranged to correspond to the patient's gum line.

Images