Liftable and bone flap restoring device and method for bone surgery

Abstract

The invention discloses a liftable and bone flap reduction device and method for bone surgery, and belongs to the technical field of bone fixation and repair. According to the device, a bone flap is fixed on an original bone through a bone fixer; the bone fixator comprises a first titanium nail, a fixing titanium plate, a threaded titanium alloy sleeve and a second titanium nail. The fixing titanium plate is an X-shaped titanium plate with holes in the four corners, one end of the fixing titanium plate is fixed to the bone flap through two second titanium nails, and the other end of the fixing titanium plate is fixed to the edge of the original bone through two first titanium nails and two threaded titanium alloy sleeves. By rotating the first titanium nail, the bone flap side is controlled to ascend and descend; a new means and method are provided for bone restoration and fixation in bone surgery, a new choice is provided between pure complete fixation and overall lifting, meanwhile, the device is higher than a traditional nail plate fixing system and a bone locking system in system strength, and the stability of the bone after restoration is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of bone fixation and repair, and in particular to a device and method for lifting and lowering a bone flap in bone surgery. Background Art

[0002] The fields of bone fixation and repair include neurosurgery, maxillofacial surgery, thoracic and cardiovascular surgery, orthopedics, etc. For example, orthopedic surgery involves the reduction and fixation of bones after surgery. Originally, bone connection mainly relied on silk thread fixation, and gradually bone lock fixation and body plate fixation methods emerged, that is, two metal discs were used to lock the broken bone from inside and outside the body to play a fixing role, but this method has the risk of postoperative epidural hematoma, and it is inconvenient for patients to move. Later, bone fixation adopted the method of bone connecting plate fixation, that is, the free bone and the surrounding bone edge were fixed with bone screws and bone connecting plates on the outside of the bone. It mainly requires the use of a manual screwdriver to fix at least two connecting plates with screws on the free bone, and then the bone is reduced, and then the other end of the connecting plate is fixed to the surrounding bone edge with a manual screwdriver. After decades of development, the main method is still to use titanium alloy bone connecting plates and fix them to the inside of the bone tissue with screws. For example, when treating some patients with bone defects, a bone that does not affect the patient's movement is taken from the patient's body. When treating a patient's mandible, the doctor takes the fibula from the patient's calf and uses it as a mandible filling material. However, it is found that the above-mentioned technology cannot achieve the condition of one-time recovery after surgery, so there is an urgent need for a method and device that can be restored in one time to prevent the risks of secondary surgery.

[0003] In summary, the traditional bone fixation system can only reduce and fix the fractured bone. Since there is no third option, the surgeon often fixes a single-function metal plate to ensure the patient's safety. During the patient's bone recovery process, the internal bone tissue may be affected by the outside world, which in turn affects the prognosis. Although the traditional fixation method completely retains the original bone shape, when inflammation, water accumulation and other symptoms occur inside the bone, the traditional method cannot achieve the purpose of decompression. Therefore, it is necessary to improve the reduction and fixation methods on the original basis. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for lifting and lowering a bone flap during bone surgery. The device can not only completely replace the traditional simple fixation device, but also reduce the internal pressure of the bone after surgery and stabilize the internal structure of the bone without a second surgery.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A device for lifting and lowering a bone flap for bone surgery comprises a bone fixer and a bone flap to be restored, wherein the bone flap is fixed to the original bone by the bone fixer; the bone fixer comprises a first titanium nail, a fixing titanium plate, a threaded titanium alloy sleeve and a second titanium nail; wherein: the fixing titanium plate is an X-shaped titanium plate with holes at four corners, one end of the fixing titanium plate is fixed to the bone flap by two second titanium nails, and the other end of the fixing titanium plate is fixed to the edge of the original bone by two first titanium nails and two threaded titanium alloy sleeves.

[0007] Furthermore, when the fixing titanium plate is fixed on the bone flap, the second titanium nail passes through the corresponding hole at the end of the fixing titanium plate and is then fixed in the corresponding screw hole opened at the edge of the bone flap.

[0008] Furthermore, the threaded titanium alloy sleeve has a height of 5 mm, an inner diameter of 2 mm, and an outer diameter of 4 mm, and is provided with threads both inside and outside, and the inner threads are opposite to the outer threads.

[0009] Furthermore, when the fixed titanium plate is fixed to the edge of the original bone, the first titanium nail passes through the corresponding hole at the end of the fixed titanium plate and is matched with the internal thread of the threaded titanium alloy sleeve, and the threaded titanium alloy sleeve is fixed in the corresponding screw hole opened at the edge of the original bone through the external thread.

[0010] Furthermore, the device also includes a limit clip and a spring fixing plate. The limit clip is sleeved on the studs of the first titanium nail and the second titanium nail and is located between the top of the thread and the nail head, preferably 1.5 mm below the lower end of the nail head; the spring fixing plate is an annular sheet structure with an inner diameter of 0.5 mm and an outer diameter of 1 mm.

[0011] Furthermore, when the fixed titanium plate is fixed on the bone flap, the second titanium nail passes through the fixed titanium plate and the retaining spring fixing plate in sequence and then is fixed on the bone flap. After fixation, the limiting buckle is located between the nail head of the second titanium nail and the fixed titanium plate, and the retaining spring fixing plate is located between the fixed titanium plate and the bone flap.

[0012] Furthermore, when the fixed titanium plate is fixed to the edge of the original bone, the first titanium nail is sequentially passed through the fixed titanium plate and the retaining spring fixing plate and screwed into the threaded titanium alloy sleeve, and the threaded titanium alloy sleeve is fixed at the edge of the original bone through an external thread; after fixation, the limiting buckle is located between the nail head of the first titanium nail and the fixed titanium plate, and the retaining spring fixing plate is located between the fixed titanium plate and the threaded titanium alloy sleeve.

[0013] Furthermore, the number of bone fixators is 3, which are installed according to the midline positioning; the length of the first titanium nail and the second titanium nail is 10 mm and the radius is 1 mm; the length of the fixed titanium plate is 20 mm, the width is 15 mm, and the thickness is 1.5 mm; circular through holes with a radius of 1 mm are provided at the four corners of the fixed titanium plate for the first titanium nail and the second titanium nail to pass through.

[0014] Furthermore, when the first titanium nail is screwed into the threaded titanium alloy sleeve, the lifting or lowering of the bone flap is controlled by rotating the first titanium nail clockwise or counterclockwise; the limiting buckles on both sides of the fixed titanium plate cooperate with the retaining spring fixing plate to ensure that the bone flap can be lifted or lowered smoothly; the maximum lifting displacement of the bone flap is 5 mm, and the lowering displacement does not exceed the lowest point of the device.

[0015] Furthermore, the threaded titanium alloy sleeve is provided with a 5 mm limit to prevent the first titanium nail from falling off due to excessive tightening force or excessive rotation stroke.

[0016] A method for raising and lowering a bone flap during bone surgery using the above-mentioned device is provided. The method comprises the following steps: raising and lowering a bone flap and lowering a bone flap using the device; the bone fixator is installed according to the midline positioning; if the gap is large, the number of bone fixators needs to be increased according to the actual situation of the patient; the two ends of the fixed titanium plate are respectively fixed at the edge of the bone flap and the original bone; the bone flap is raised or lowered by rotating the first titanium nail clockwise or counterclockwise.

[0017] The design principle and beneficial effects of the present invention are as follows

[0018] 1. The device and method for lifting and lowering the bone flap used in bone surgery solves the problem that the traditional bone fixation system cannot reduce pressure. At the same time, the device is stronger than the traditional nail plate fixation system and the bone locking system, ensuring the stability of the bone after reduction. The device can lift the defective bone flap side by adjusting the first titanium nail 101, and can reduce it normally according to the rotation path with a certain tension.

[0019] 2. The device of the present invention has stability of fixation: the traditional nail-piece system is fixed at three points, with a single titanium piece mode, while the present invention is fixed at four points, and each device will be fixed to the bone flap side and the original bone side respectively, which is more stable. They are connected by special titanium nails, which is stronger than the traditional fixation system.

[0020] 3. The device of the present invention has an adjustable lifting function, which can effectively reduce the damage caused by increased intraosseous pressure after surgery and enhance the postoperative rehabilitation effect.

[0021] 4. For patients with mild to moderate swelling after surgery, the device of the present invention can be raised by about 6 mm, which can completely achieve the purpose of decompression. The present invention can replace traditional bone fracture treatment methods to ensure the surgical effect.

[0022] 5. The device of the present invention has a simple structure and controllable cost, which is conducive to practical application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the device for lifting and lowering a bone flap in bone surgery after installation.

[0024] Figure 2The present invention is a schematic diagram of the structure of a device for lifting and lowering a bone flap used in bone surgery.

[0025] Figure 3 This is a structural diagram of the titanium nail in the device of the present invention.

[0026] Figure 4 This is a structural diagram of a fixed titanium plate in the device of the present invention.

[0027] Figure 5 This is a structural diagram of a threaded titanium alloy sleeve in the device of the present invention.

[0028] Figure 6 It is a structural diagram of the clip fixing piece in the device of the present invention.

[0029] In the figure: 100 - bone fixator; 101 - titanium nail; 102 - fixed titanium plate; 103 - threaded titanium alloy sleeve; 104 - second titanium nail; 105 - retaining spring fixing plate; 106 - limiting buckle; 200 - bone flap; 300 - original bone. DETAILED DESCRIPTION

[0030] In order to further understand the present invention, the present invention is described in detail below.

[0031] The present invention provides a device for bone surgery that can be raised and lowered and can restore a bone flap. Figure 1 The device includes a bone fixator 100 and a bone flap 200 to be restored. The bone flap 200 is restored to the original bone 300 through the bone fixator 100. The number of bone fixators 100 is preferably 3. The bone fixators are positioned and installed according to the midline. If the gap is large, the number of bone fixators needs to be increased according to the actual situation of the patient.

[0032] like Figure 2 As shown, the bone fixator 100 includes a first titanium nail 101 , a fixing titanium plate 102 , a threaded titanium alloy sleeve 103 , a second titanium nail 104 , a limiting buckle 106 and a spring fixing sheet 105 .

[0033] like Figure 3 As shown, the length of the first titanium nail 101 and the second titanium nail 104 is 10 mm and the radius is 1 mm; the limiting buckle 106 is sleeved on the studs of the first titanium nail 101 and the second titanium nail 104, and is located between the top of the thread and the nail head, preferably 1.5 mm below the lower end of the nail head.

[0034] like Figure 4 As shown, the fixed titanium plate 102 is an X-shaped titanium plate with a length of 20 mm, a width of 15 mm, and a thickness of 1.5 mm. Circular through holes with a radius of 1 mm are provided at the four corners for the first titanium nail 101 and the second titanium nail 104 to pass through. The material is medical titanium alloy.

[0035] like Figure 5 As shown, the threaded titanium alloy sleeve 103 has a height of 5 mm, an inner diameter of 2 mm, and an outer diameter of 4 mm. It is provided with threads both inside and outside, and the inner threads are opposite to the outer threads.

[0036] like Figure 6 As shown, the retaining spring fixing sheet 105 is a notched annular sheet structure with an inner diameter of 0.5 mm and an outer diameter of 1 mm.

[0037] When the bone flap 200 is returned to the original bone 300 by the bone fixator 100, one end of the fixing titanium plate 102 is fixed to the bone flap 200 by two second titanium nails 104, and the other end of the fixing titanium plate 102 is fixed to the edge of the original bone 300 by two first titanium nails 101 and two threaded titanium alloy sleeves 103. The details are as follows:

[0038] When the fixing titanium plate 102 is fixed on the bone flap, the second titanium nail 104 passes through the corresponding holes on the fixing titanium plate 102 and the clip fixing piece 105 in sequence and is then fixed in the corresponding screw hole opened at the edge of the bone flap 200. After fixation, the limit buckle 106 is located between the nail head of the second titanium nail 104 and the fixing titanium plate 102, and the clip fixing piece 105 is located between the fixing titanium plate 102 and the bone flap 200.

[0039] When fixing the fixed titanium plate 102 to the edge of the original bone 300, the first titanium nail 101 passes through the corresponding holes at the end of the fixed titanium plate 102 and the retaining spring fixing plate 105 in sequence and then matches and connects with the internal thread of the threaded titanium alloy sleeve 103 (screwed into the threaded titanium alloy sleeve), and the threaded titanium alloy sleeve is fixed in the corresponding screw hole opened at the edge of the original bone 300 through the external thread; after fixation, the limiting buckle 106 is located between the nail head of the first titanium nail 101 and the fixed titanium plate 102, and the retaining spring fixing plate 105 is located between the fixed titanium plate 102 and the threaded titanium alloy sleeve 103.

[0040] When the first titanium nail 101 is screwed into the threaded titanium alloy sleeve, the lifting or lowering of the bone flap can be controlled by rotating the first titanium nail 101 clockwise or counterclockwise; the movement of the fixed titanium plate 102 can be limited by cooperating with the limit buckles on both sides of the fixed titanium plate 102 and the retaining spring fixing plate 105, thereby ensuring that the bone flap 200 can be lifted or lowered smoothly; the maximum lifting displacement of the bone flap 200 is 5 mm, and the lowering displacement does not exceed the lowest point of the device.

[0041] The threaded titanium alloy sleeve 103 is provided with a limit of 5 mm to prevent the first titanium nail 101 from falling off due to excessive tightening force or excessive rotation stroke.

[0042] When using the above-mentioned device to raise and lower the bone flap and reduce it, first, the three bone fixators are installed according to the midline positioning. If the gap is large, the number of bone fixators needs to be increased according to the actual situation of the patient. During installation, the two ends of the fixed titanium plate are respectively fixed at the bone flap and the edge of the original bone, and the bone flap is controlled to rise or fall by rotating the first titanium nail clockwise or counterclockwise. For example, the bone flap 200 is controlled to rise by rotating the first titanium nail 101 clockwise, and the bone flap 200 is controlled to fall by rotating the first titanium nail 101 counterclockwise.

[0043] The device of the present invention provides a new means and method for the reduction and fixation of bones after orthopedic surgery, and provides a new option between simple complete fixation and complete lifting. The use of the fixation device for patients who may have increased intraosseous pressure after surgery can effectively solve the problem of increased internal pressure and help control the risks brought by postoperative tissue swelling in patients. At the same time, the device is stronger than traditional nail plate fixation systems and bone locking systems, ensuring the stability of the bone after reduction. The device can achieve the lifting of the bone flap side by adjusting the first titanium nail, and can be reduced normally according to the rotation path with a certain tension.

[0044] The system strength of the device of the present invention is stronger than the traditional nail plate fixation system and the bone locking system, which ensures the stability of the bone after reduction. After being wrapped by connective tissue 3 months after the operation, the effect is no different from the existing bone fixation system on the market.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable technicians in this field to understand the content of the present invention and implement it. It cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the essence of the present invention belong to the protection scope of the present invention.

Claims

1. A device for lifting and lowering a bone flap in bone surgery, characterized in that: The device comprises a bone fixer (100) and a bone flap (200) to be restored, and the bone flap (200) is fixed to the original bone (300) by the bone fixer (100); The bone fixator (100) comprises a first titanium nail (101), a fixing titanium plate (102), a threaded titanium alloy sleeve (103) and a second titanium nail (104); wherein: the fixing titanium plate (102) is an X-shaped titanium plate with holes opened at four corners, one end of the fixing titanium plate (102) is fixed to the bone flap (200) through two second titanium nails (104), and the other end of the fixing titanium plate (102) is fixed to the edge of the original bone (300) through two first titanium nails (101) and two threaded titanium alloy sleeves (103).

2. The device for lifting and lowering bone flap in bone surgery according to claim 1, characterized in that: When the fixing titanium plate (102) is fixed on the bone flap, the second titanium nail (104) passes through the corresponding hole at the end of the fixing titanium plate (102) and is then fixed in the corresponding screw hole opened at the edge of the bone flap (200).

3. The device for lifting and lowering bone flap in bone surgery according to claim 2, characterized in that: The threaded titanium alloy sleeve (103) has a height of 5 mm, an inner diameter of 2 mm, and an outer diameter of 4 mm. It is provided with threads both inside and outside, and the inner threads are opposite to the outer threads. When the fixed titanium plate (102) is fixed to the edge of the original bone (300), the first titanium nail (101) passes through the corresponding hole at the end of the fixed titanium plate (102) and is matched with the inner thread of the threaded titanium alloy sleeve (103). The threaded titanium alloy sleeve is fixed in the corresponding screw hole opened at the edge of the original bone (300) through the outer thread.

4. The device for lifting and lowering a bone flap in bone surgery according to claim 3, characterized in that: The device also includes a limit buckle (106) and a spring fixing plate (105). The limit buckle (106) is sleeved on the studs of the first titanium nail (101) and the second titanium nail (104) and is located between the top of the thread and the nail head, preferably 1.5 mm below the lower end of the nail head; the spring fixing plate (105) is an annular sheet structure with an inner diameter of 0.5 mm and an outer diameter of 1 mm.

5. The device for lifting and lowering bone flap in bone surgery according to claim 4, characterized in that: When the fixed titanium plate (102) is fixed on the bone flap, the second titanium nail (104) passes through the fixed titanium plate (102) and the retaining spring fixing plate (105) in sequence and is then fixed on the bone flap (200). After fixation, the limiting buckle (106) is located between the nail head of the second titanium nail (104) and the fixed titanium plate (102), and the retaining spring fixing plate (105) is located between the fixed titanium plate (102) and the bone flap (200).

6. The device for lifting and lowering bone flap in bone surgery according to claim 4, characterized in that: When the fixing titanium plate (102) is fixed to the edge of the original bone (300), the first titanium nail (101) passes through the fixing titanium plate (102) and the retaining spring fixing plate (105) in sequence and is screwed into the threaded titanium alloy sleeve, and the threaded titanium alloy sleeve is fixed to the edge of the original bone (300) through the external thread; after fixation, the limiting buckle (106) is located between the nail head of the first titanium nail (101) and the fixing titanium plate (102), and the retaining spring fixing plate (105) is located between the fixing titanium plate (102) and the threaded titanium alloy sleeve (103).

7. The device for lifting and lowering bone flap in bone surgery according to claim 4, characterized in that: The number of bone fixators (100) is 3 and they are installed according to the midline positioning; the length of the first titanium nail (101) and the second titanium nail (104) is 10 mm and the radius is 1 mm; the length of the fixing titanium plate (102) is 20 mm, the width is 15 mm and the thickness is 1.5 mm; the four corners of the fixing titanium plate (102) are provided with circular through holes with a radius of 1 mm for the first titanium nail (101) and the second titanium nail (104) to pass through.

8. The device for lifting and lowering a bone flap in bone surgery according to claim 4, characterized in that: When the first titanium nail (101) is screwed into the threaded titanium alloy sleeve, the first titanium nail (101) is rotated clockwise or counterclockwise to control the lifting or lowering of the bone flap; the limiting buckles on both sides of the fixed titanium plate (102) cooperate with the spring fixing plate (105) to ensure that the bone flap (200) can be lifted or lowered smoothly; the maximum lifting displacement of the bone flap (200) is 5 mm, and the lowering displacement does not exceed the lowest point of the device.

9. The device for lifting and lowering bone flap in bone surgery according to claim 4, characterized in that: The threaded titanium alloy sleeve (103) is provided with a limit of 5 mm to prevent the first titanium nail (101) from falling off due to excessive tightening force or excessive rotation stroke.

10. A method for lifting and lowering a bone flap in bone surgery using the device according to any one of claims 1 to 9, characterized in that: The method is to use the device to lift and lower the bone flap and reduce it, and install the bone fixator according to the midline positioning. If the gap is large, the number of bone fixators needs to be increased according to the actual situation of the patient; the two ends of the fixed titanium plate are respectively fixed at the edge of the bone flap and the original bone, and the bone flap is controlled to rise or fall by rotating the first titanium nail clockwise or counterclockwise.

Images