Absorbable mandible extender
By using absorbable fixed foot and cover structure prepared with absorbable materials, the problem of difficult removal of fixed foot by jaw traction device is solved, and the effect of simplifying surgery and shortening surgical time is achieved.
Patent Information
- Application Number
- CN202421523522.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-06-28
AI Technical Summary
When the existing jaw traction device is removed, it is difficult to remove the fixed foot, resulting in the problem of prolonged surgery and increased trauma.
The absorbable upper and lower electrode fixing feet prepared with absorbable materials are used to traction of the absorbable shell to achieve the coupling of the upper and lower electrode fixing feet, and the tail of the absorbable extender is removed after the operation, avoiding the expansion of the incision after the operation to remove the fixed foot.
It greatly shortens the operation time and reduces the difficulty of the operation, reduces patient trauma, and simplifies the surgical process.
Smart Images
Figure CN223262997U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of surgical instruments, in particular to an absorbable mandibular extender. Background Art
[0002] Craniofacial microsomia is a congenital craniofacial deformity second only to cleft lip and palate in incidence, and can affect multiple organs and structures, including the mandible, maxilla, zygomatic bone, temporal bone, external ear, middle ear, and facial nerve. Distraction osteogenesis is commonly used for congenital dentofacial and craniofacial defects difficult to correct with traditional orthognathic surgery, defects caused by maxillofacial tumor resection and trauma, and mandibular developmental deformities secondary to cleft lip and palate surgery. Distraction osteogenesis is one of the primary treatments for craniofacial microsomia, using mechanical traction to promote new bone formation at a rate 4-6 times the natural growth rate of childhood.
[0003] The device used in distraction osteogenesis is a mandibular distractor. It consists of a fixation device and a distraction device. The fixation device has front and rear fixed legs, one of which is connected to the distraction device and can be moved. The distraction device generally consists of a screw and a spiral track. Rotating the screw at a predetermined speed and frequency causes the distraction device to move the fixed leg and the bone segment attached to it along the spiral track.
[0004] In actual clinical practice, when the extender is removed after traction, the absorbable upper pole fixation foot is often extended upward to the back of the zygomatic arch, making it difficult to remove the screw of the absorbable upper pole fixation foot of the traction device. This may cause the traction metal absorbable upper pole fixation foot to remain in the patient's body or increase the operation time and surgical trauma. Utility Model Content
[0005] In response to the above problems, the utility model provides an absorbable mandibular extender, which is fixed on the two sides of the mandibular osteotomy by an absorbable upper pole fixing foot and an absorbable lower pole fixing foot made of absorbable material, and the traction of the absorbable cover shell is used to achieve the alignment of the two sides of the osteotomy connected by the upper and lower pole fixing feet. The tail of the absorbable extender can be removed after the operation, and there is no need to expand the incision after the operation to remove the upper and lower fixing feet, which greatly reduces the operation time and difficulty.
[0006] To achieve the above-mentioned purpose, the present invention provides an absorbable mandibular extender, comprising: an absorbable upper pole fixing foot, an absorbable lower pole fixing foot, an absorbable cover shell and an absorbable extender tail;
[0007] The absorbable cover is connected to the absorbable upper pole fixing foot and the absorbable lower pole fixing foot respectively, and the absorbable upper pole fixing foot and the absorbable lower pole fixing foot are respectively fixed to the osteotomies on both sides of the mandibular portion to be lengthened;
[0008] A screw rod is provided in the absorbable cover, and loosening the screw rod can completely separate the absorbable upper pole fixing leg and the absorbable lower pole fixing leg, and tightening the screw rod can drive the two sides of the osteotomy fixed by the absorbable upper pole fixing leg and the absorbable lower pole fixing leg to achieve alignment through the absorbable cover;
[0009] The tail of the absorbable extender is connected to the screw rod and extends outside the body.
[0010] In the above technical solution, preferably, the absorbable upper pole fixing foot, the absorbable lower pole fixing foot, the absorbable cover, the absorbable extender tail and the screw rod are all made of absorbable materials.
[0011] In the above technical solution, preferably, the absorbable mandibular extender further includes a universal tail rod, which is connected to the tail of the absorbable extender and can freely rotate within a preset angle range relative to the tail of the absorbable extender.
[0012] In the above technical solution, preferably, the absorbable upper pole fixing foot and the absorbable lower pole fixing foot are respectively fixed to the osteotomies on both sides of the portion of the mandible to be lengthened by absorbable nails.
[0013] In the above technical solution, preferably, the absorbable cover and the absorbable lower pole fixing foot are respectively provided with matching slide grooves and slideways, and the absorbable cover and the absorbable lower pole fixing foot can slide relative to each other through the slide grooves and the slideways.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the absorbable upper pole fixing foot and the absorbable lower pole fixing foot made of absorbable material are respectively fixed on the osteotomies on both sides of the mandible, and the traction of the absorbable cover shell is used to achieve the alignment of the osteotomies on both sides connected by the upper and lower pole fixing feet. The tail of the absorbable extender can be removed after the operation, and there is no need to expand the incision after the operation to remove the upper and lower fixing feet, which greatly reduces the operation time and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 The present invention is a schematic structural diagram of an absorbable mandibular extender disclosed in one embodiment of the present invention.
[0016] In the figure, the corresponding relationship between each component and the reference numeral is as follows:
[0017] 1. Absorbable upper pole fixing foot, 2. Absorbable lower pole fixing foot, 3. Absorbable cover, 4. Absorbable extender tail, 5. Universal tail rod. DETAILED DESCRIPTION
[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are 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 shall fall within the scope of protection of the present invention.
[0019] The present invention is described in further detail below with reference to the accompanying drawings:
[0020] like Figure 1 As shown, an absorbable mandibular extender according to the present invention comprises: an absorbable upper pole fixing foot 1, an absorbable lower pole fixing foot 2, an absorbable cover 3 and an absorbable extender tail 4;
[0021] The absorbable cover 3 is connected to the absorbable upper pole fixing foot 1 and the absorbable lower pole fixing foot 2 respectively. The absorbable upper pole fixing foot 1 and the absorbable lower pole fixing foot 2 are respectively fixed to the osteotomies on both sides of the mandibular portion to be lengthened.
[0022] A screw rod is provided in the absorbable cover 3. Loosening the screw rod can completely separate the absorbable upper pole fixing foot 1 and the absorbable lower pole fixing foot 2. Tightening the screw rod can drive the two sides of the osteotomy fixed by the absorbable upper pole fixing foot 1 and the absorbable lower pole fixing foot 2 to achieve alignment through the absorbable cover 3.
[0023] The tail portion 4 of the absorbable extender is connected to the screw rod and extends outside the body.
[0024] In this embodiment, the absorbable upper pole fixing foot 1 and the absorbable lower pole fixing foot 2 made of absorbable material are respectively fixed on the osteotomies on both sides of the mandible, and the traction of the absorbable cover 3 is used to achieve the alignment of the osteotomies on both sides connected to the upper and lower pole fixing feet. The tail part 4 of the absorbable extender can be removed after the operation, and there is no need to expand the incision after the operation to remove the upper and lower fixing feet, which greatly reduces the operation time and difficulty.
[0025] Specifically, during mandibular lengthening surgery, the absorbable upper fixation foot 1 is fixed to the bone above the mandibular osteotomy line, while the absorbable lower fixation foot 2 is fixed to the bone below the mandibular osteotomy line. This ensures that the bones at both ends of the osteotomy line are well aligned. Once the fixation is satisfactory, the absorbable screw is checked to ensure that it can be smoothly rotated to fully separate the upper and lower fixation feet. Once this is complete, the screw is retracted to the upper and lower fixation angles to ensure good alignment of the bone segments. The surgical incision is then closed, leaving a portion of the absorbable tail outside the body.
[0026] 5-7 days after the operation, the screw rod is turned, and the upper and lower poles are pulled apart by about 1mm every day for 30 days. The mechanical traction force is used to promote new bone formation and extend the mandibular bone for the treatment of mandibular developmental deformity. After the traction length is maintained for several months, the 4 parts of the tail of the absorbable extender in vitro are surgically removed. The tail 4 of the absorbable extender in vivo does not need to be removed, which greatly shortens the operation time and reduces the difficulty of the operation. There is no need to expand the mandibular incision or make an additional incision in front of the ear to remove the absorbable upper pole fixation foot 1 screw.
[0027] In the above embodiment, preferably, the absorbable upper pole fixing foot 1, the absorbable lower pole fixing foot 2, the absorbable cover 3, the absorbable extender tail 4 and the screw rod are all made of absorbable materials.
[0028] Specifically, the surgical implant grade absorbable material used in the present application does not need to be removed after the traction treatment is completed, and the absorbable material will eventually be gradually absorbed into the patient's body.
[0029] In the above embodiment, preferably, the absorbable mandibular extender further includes a universal tail rod 5, which is connected to the tail portion 4 of the absorbable extender, and the universal tail rod 5 can freely rotate within a preset angle range relative to the tail portion 4 of the absorbable extender. The universal tail rod 5 can facilitate the fixation of the absorbable mandibular extender after surgery, and can be removed after each day of extension and reinstalled during the extension process.
[0030] In the above embodiment, preferably, the absorbable upper and lower pole fixing legs 1 and 2 are respectively fixed to the osteotomies on either side of the mandibular osteotomy site to be lengthened using absorbable nails. Specifically, the absorbable upper pole fixing leg 1 is fixed to the bone above the mandibular osteotomy line using absorbable nails, while the absorbable lower pole fixing leg 2 is fixed to the bone below the mandibular osteotomy line using absorbable nails.
[0031] In the above embodiment, preferably, the absorbable cover 3 and the absorbable lower pole fixing foot 2 are respectively provided with matching sliding grooves and slideways, and the absorbable cover 3 and the absorbable lower pole fixing foot 2 can slide relative to each other through the sliding grooves and slideways.
[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. An absorbable mandibular extender, characterized in that: include: absorbable upper pole fixation foot, absorbable lower pole fixation foot, absorbable cover and absorbable extender tail; The absorbable cover is connected to the absorbable upper pole fixing foot and the absorbable lower pole fixing foot respectively, and the absorbable upper pole fixing foot and the absorbable lower pole fixing foot are respectively fixed to the osteotomies on both sides of the mandibular portion to be lengthened; A screw rod is provided in the absorbable cover, and loosening the screw rod can completely separate the absorbable upper pole fixing leg and the absorbable lower pole fixing leg, and tightening the screw rod can drive the two sides of the osteotomy fixed by the absorbable upper pole fixing leg and the absorbable lower pole fixing leg to achieve alignment through the absorbable cover; The tail of the absorbable extender is connected to the screw rod and extends outside the body.
2. The absorbable mandibular extender according to claim 1, characterized in that: The absorbable upper pole fixing foot, the absorbable lower pole fixing foot, the absorbable cover shell, the absorbable extender tail and the screw rod are all made of absorbable materials.
3. The absorbable mandibular extender according to claim 1 or 2, characterized in that: It also includes a universal tail rod, which is connected to the tail of the absorbable extender and can rotate freely within a preset angle range relative to the tail of the absorbable extender.
4. The absorbable mandibular extender according to claim 3, characterized in that: The absorbable upper pole fixing foot and the absorbable lower pole fixing foot are respectively fixed to the osteotomies on both sides of the mandibular portion to be lengthened through absorbable nails.
5. The absorbable mandibular extender according to claim 4, characterized in that: The absorbable cover shell and the absorbable lower pole fixing foot are respectively provided with matching sliding grooves and slideways, and the absorbable cover shell and the absorbable lower pole fixing foot can slide relative to each other through the sliding grooves and the slideways.