CN111297457A - Relay type bone moving device based on gear power and using method - Google Patents
Relay type bone moving device based on gear power and using method Download PDFInfo
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 114
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007547 defect Effects 0.000 claims abstract description 32
- 230000002512 anti-withdrawal effect Effects 0.000 claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000000249 desinfective effect Effects 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 230000000399 orthopedic effect Effects 0.000 abstract description 2
- 238000002271 resection Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000011164 ossification Effects 0.000 description 4
- 210000004872 soft tissue Anatomy 0.000 description 4
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- 230000000694 effects Effects 0.000 description 3
- 210000003414 extremity Anatomy 0.000 description 3
- 238000000338 in vitro Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000474 nursing effect Effects 0.000 description 2
- 210000000963 osteoblast Anatomy 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 208000020084 Bone disease Diseases 0.000 description 1
- 208000024779 Comminuted Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 206010017088 Fracture nonunion Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 206010023230 Joint stiffness Diseases 0.000 description 1
- 208000002565 Open Fractures Diseases 0.000 description 1
- 206010031264 Osteonecrosis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
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- 230000032631 intramembranous ossification Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
- A61B17/66—Alignment, compression or distraction mechanisms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
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Abstract
The invention discloses a relay type bone moving device based on gear power and a using method thereof, belonging to the technical field of medical instruments for orthopedics department. The relay type bone moving device comprises an internal fixing bridging plate, a sliding block, a plurality of groups of external rotating shaft combiners and a plurality of screws. When carrying out the bone and removing, the sleeve is moved in the rotation, and then drives the sliding block, and the removal of sliding block can drive and cut free bone piece and remove, makes the interval in bone defect district diminish, reads through the scale mark on the power shaft core and removes distance data. By adopting the device, the internal fixation bridging steel plate and the external rotating shaft combiner with the gear can be effectively combined, and a relay type extension mode is adopted according to the length of the bone defect, so that the sliding block carrying the cut bone block stably slides on the sliding chute of the internal fixation bridging plate, the bone block is pulled on the premise of ensuring the force line, and a simple, safe, effective and reliable bone moving technology can be realized.
Description
Technical Field
The invention belongs to the technical field of orthopedic medical instruments, and particularly relates to a relay type bone moving device based on gear power and a using method thereof.
Background
In 1950, Russian university Ilizarov advocated the use of external fixators in combination with bone distraction osteogenesis to treat bone defects. A plurality of researches find that the Ilizarov bone moving technology can effectively correct lower limb angulation deformity and limb length inequality and treat fracture nonunion and bone defect.
Comminuted fracture and open fracture caused by pathological factors such as trauma, inflammation, bone disease and the like are accompanied by massive bone defects, defects caused by segmental osteonecrosis caused by infection, unequal limb and the like, and all the problems belong to bone defects caused by diseases. In addition, the bone moving technology is widely applied to the heightening operation of plastic medicine in clinic, the moving technology is clinically applied for many years, the technology is mature, and the curative effect is reliable.
The bone moving technology is characterized in that metaphysis of long bones of limbs is cut off, a cut-off bone block is pulled to the opposite side at a speed of prolonging 1mm per day through an accurate fixing device, bone end cavities caused by pulling are filled with I-type collagen in a cross-linking mode, and the I-type collagen and osteoblast clusters can be constructed into a miniature bone column. Histological and ultrasound structural studies have shown that osteoblasts can bring together individual collagen bundles to form bone-like material, which eventually undergoes a mineralization process by intramembranous ossification.
The current fixation devices used for bone mobilization include manual and electric external fixation brackets, magnetic intramedullary nail devices. The external fixing frame is widely applied, however, although the external fixing frame is simple in design, the external fixing frame is heavy in appearance and difficult to care, the needle channel is used for cutting soft tissues, the needle channel is infected, the proximal joint flexion and extension activities are limited (pain caused by the needle channel cutting the soft tissues during activities), the biomechanical stability is poor (the eccentricity is too large), the fixing failure is caused, and a series of complications are difficult to control by clinicians.
The magnetic intramedullary nail is developed by foreign scholars and applied to clinic, most defects of an external fixing frame are avoided, but documents show that the magnetic intramedullary nail has the defects of too fast traction, difficult retraction, backward movement, bending, breakage, unstable rotation and the like. In addition, the price is very expensive and is not suitable for clinical popularization.
In order to adapt to the development of bone moving technology and reduce a plurality of complications of various bone lengthening devices at present, it is imperative to develop a novel bone moving device which is simple in design, safe, effective and low in cost.
Disclosure of Invention
The invention provides a relay type bone moving device based on gear power and a using method thereof, which have simple structure, low cost and no complication and aim to solve the problems that the prior bone moving device causes complication and is high in price. By adopting the device, the internal fixation bridging steel plate and the external rotating shaft combiner with the gear can be effectively combined, and a relay type extension mode is adopted according to the length of the bone defect, so that the sliding block carrying the cut bone block stably slides on the sliding chute of the internal fixation bridging plate, the bone block is pulled on the premise of ensuring the force line, and a simple, safe, effective and reliable bone moving technology can be realized.
The technical scheme of the invention is as follows:
a relay type bone moving device based on gear power comprises an internal fixing bridge plate 1, a sliding block 2, a plurality of groups of external rotating shaft combiners and a plurality of screws 7.
The inner fixed bridging plate 1 is of a rectangular thin plate structure, and a plurality of threaded holes a8 are formed in the fixed bridging plate 1; a sliding groove is formed in the inner fixed bridging plate 1, and a plurality of groups of threaded holes b9 are formed in two sides of the sliding groove; the screw 7 passes through the screw hole a8 to fix the internal fixation bridging plate 1 with the bone 10 with bone defect, and the defect area of the bone 10 is located in the middle of the internal fixation bridging plate 1.
The external rotating shaft combiner comprises a power shaft core 3, a moving sleeve 4, an anti-withdrawal sleeve 5 and a pressure nut 6.
The power shaft core 3 is of a cylindrical structure, external threads are formed in two ends of the power shaft core, an external gear a is arranged between the external threads, scale marks are arranged on the surface of the external gear a and used for reading the bone moving distance, and the power shaft core 3 is arranged in a threaded hole b9 of the internal fixed bridging plate 1.
One end of the peripheral surface of the moving sleeve 4 is provided with an external gear b, and the other end of the peripheral surface is processed into a regular hexagon structure; the inner circumferential surface of the moving sleeve 4 is provided with an internal gear a; the moving sleeve 4 is sleeved on the power shaft core 3, an internal gear a of the moving sleeve 4 is meshed with an external gear a of the power shaft core 3, and an external gear b of the moving sleeve 4 is close to the internal fixed bridging plate 1.
The sliding block 2 is arranged in a sliding chute of the internal fixed bridging plate 1, the sliding block 2 is provided with a linear rack along the sliding direction, and the linear rack of the sliding block 2 is meshed with an external gear b of the moving sleeve 4; the sliding block 2 is provided with a plurality of threaded holes c11, and the screws 7 penetrate through the threaded holes c11 to fix the sliding block with the bone 10.
An internal gear b is arranged on the inner side of the anti-retreat sleeve 5, one end of the anti-retreat sleeve 5 is processed into an inner hexagonal countersunk hole, and the inner hexagonal countersunk hole has the same regular hexagon structure as the moving sleeve 4; the anti-moving sleeve 5 is sleeved on the power shaft core 3, an inner gear b of the anti-moving sleeve 5 is meshed with an outer gear a of the power shaft core 3, and an inner hexagonal countersunk hole of the anti-moving sleeve 5 is matched and fixed with a regular hexagon structure of the moving sleeve 4.
The pressurizing nut 6 is arranged on the external thread of the power shaft core 3, and the moving sleeve 4 and the anti-moving sleeve 5 are tightly pressed on the inner fixed bridging plate 1 through screwing pretightening force, so that the moving sleeve 4 is prevented from rotating and the anti-moving sleeve 5 is prevented from being separated.
A use method of a relay type bone moving device based on gear power comprises the following steps:
the method comprises the following steps: selecting a proper bone moving device according to the length of the bone 10 with bone defect, and sterilizing the internal fixed bridging plate 1, the sliding block 2, the power shaft core 3, the moving sleeve 4, the anti-withdrawal sleeve 5, the pressure nut 6 and the screw 7.
Step two: the internal fixation bridge plate 1 is bridge-fixed with screws 7 to both ends of a bone 10 with bone defect, and the bone defect area of the bone 10 is placed in the middle of the internal fixation bridge plate 1.
Step three: a straight line is selected at the metaphysis of the bone 10 as the resection line 12, and the area between the resection line 12 and the bone defect of the bone 10 is the free bone mass.
Step four: the sliding block 2 is fixed to the free bone block using screws 7.
Step five: the bone is cut along the cut line 12.
Step six: the position and the number of the external rotary shaft combiners are selected according to the moving force and the moving stroke length, and the power shaft core 3 is screwed into the threaded hole b9 of the internal fixed bridge plate 1 in a rotating way.
Step seven: the moving sleeve 4 is sleeved into the power shaft core 3, the internal gear a of the moving sleeve 4 is meshed with the external gear a of the power shaft core 3, and the external gear b of the moving sleeve 4 is meshed with the linear rack of the sliding block 2.
Step eight: the anti-retreat sleeve 5 is sleeved on the power shaft core 3, an inner hexagonal countersunk hole of the anti-retreat sleeve 5 is matched and fixed with a regular hexagonal structure of the moving sleeve 4, and an inner gear b of the anti-retreat sleeve 5 is meshed with an outer gear a of the power shaft core 3.
Step nine: the pressurizing nut 6 is arranged on the external thread of the power shaft core 3, the moving sleeve 4 and the anti-moving sleeve 5 are tightly pressed on the inner fixed bridging plate 1 through screwing pretightening force, and the moving sleeve 4 is prevented from rotating and the anti-moving sleeve 5 is prevented from being separated.
Step ten: when the bone is moved, the pressure nut 6 and the anti-withdrawal sleeve 5 are taken down, the moving sleeve 4 is rotated to drive the sliding block 2, the movement of the sliding block 2 can drive the cut free bone blocks to move, and the space between the bone defect areas is reduced; after the bone is moved, installing an anti-withdrawal sleeve 5 and a pressure nut 6 according to the eighth step and the ninth step; and pulls the new bone tissue along the resection line 12.
When the moving sleeve 4 is rotated, the moving sleeve 4 is always kept to be tightly attached to the internal fixed bridging plate 1, and the bone moving distance is read through the scale marks on the power shaft core 3;
after the moving is finished, installing an anti-withdrawal sleeve 5 and a pressure nut 6 according to the installation step eight and the installation step nine; if the moving resistance is large or the moving stroke is long, the number of the external rotating shaft combiner can be increased to move in a relay manner.
The invention has the beneficial effects that:
soft tissue cutting: the mode of rotating the sleeve at a fixed position is adopted in vitro, and the sleeve slides through the track of the internal sliding block and is pulled forwards to form a bone, so that the defect of soft tissue cutting by an external fixing frame needle channel is effectively prevented;
the force line is accurate: the sliding block that cuts the bone piece that carries slides along internal fixation bridging board track, and the tractive force line is more accurate.
Biomechanics: the locking steel plate system is better in biomechanical feasibility compared with an external fixator.
Nursing and daily life: the number of the in-vitro rotary combiner is selected according to the lack length of the sclerotin, so that the in-vitro retention of the device is reduced as much as possible, and the device is beneficial to nursing and wearing clothes.
Operational energy efficiency: the device can be moved in two directions, and can reversely rotate the moving sleeve to prevent the occurrence of wire-drawing-shaped drawing bone formation if the osteogenesis area has poor osteogenesis.
The device of the invention can be used for carrying out the proximal joint movement in an early stage and preventing the occurrence of the joint stiffness complication.
In a word, the device is effectively combined with an internal fixed bridging steel plate and an external rotating shaft combiner with gears, and a simple, safe, effective and reliable bone moving technology can be realized.
Drawings
FIG. 1 is a front view of the general construction of the present invention;
FIG. 2 is a schematic structural view of an internal fixation bridge plate;
FIG. 3 is a schematic view of a slider mounting position;
FIG. 4 is a schematic view of a slider configuration;
fig. 5 is a schematic view of the power shaft core structure.
In the figure: 1. internally fixing a bridge plate; 2. a slider; 3. a power shaft core; 4. moving the sleeve; 5. a withdrawal prevention sleeve; 6. a compression nut; 7. a screw; 8. a threaded hole a; 9. a threaded hole b; 10. a bone; 11. a threaded hole c; 12. and (6) cutting off the line.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the present invention is further described below with reference to the accompanying drawings in combination with the embodiments so that those skilled in the art can implement the present invention by referring to the description, and the scope of the present invention is not limited to the embodiments. It is to be understood that the embodiments described below are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A relay type bone moving device based on gear power as shown in figure 1 comprises an internal fixing bridge plate 1, a sliding block 2, two sets of external rotating shaft combiners and 8 screws 7.
As shown in fig. 2, the rectangular thin plate structure of the internal fixation bridging plate 1 is provided with a plurality of threaded holes a8 on the fixation bridging plate 1; a sliding groove is formed in the inner fixed bridging plate 1, and a plurality of groups of threaded holes b9 are formed in two sides of the sliding groove; the screw 7 passes through the screw hole a8 to fix the internal fixation bridging plate 1 with the bone 10 with bone defect, and the defect area of the bone 10 is located in the middle of the internal fixation bridging plate 1.
The external rotating shaft combiner comprises a power shaft core 3, a moving sleeve 4, an anti-withdrawal sleeve 5 and a pressure nut 6.
As shown in fig. 5, the power shaft core 3 is a cylindrical structure, both ends of the power shaft core are provided with external threads, an external gear a is arranged between the external threads, the surface of the external gear a is provided with scale marks for reading the bone moving distance, and the power shaft core 3 is installed in a threaded hole b9 of the internal fixed bridging plate 1.
One end of the peripheral surface of the moving sleeve 4 is provided with an external gear b, and the other end of the peripheral surface is processed into a regular hexagon structure; the inner circumferential surface of the moving sleeve 4 is provided with an internal gear a; the moving sleeve 4 is sleeved on the power shaft core 3, an internal gear a of the moving sleeve 4 is meshed with an external gear a of the power shaft core 3, and an external gear b of the moving sleeve 4 is close to the internal fixed bridging plate 1.
A sliding block 2 shown in fig. 4 is installed in a sliding groove of an internal fixed bridging plate 1, the sliding block 2 is provided with a linear rack along the sliding direction, the linear rack of the sliding block 2 is meshed with an external gear b of a moving sleeve 4, and the meshing structure is shown in fig. 3; the sliding block 2 is provided with a plurality of threaded holes c11, and the screws 7 penetrate through the threaded holes c11 to fix the sliding block with the bone 10.
An internal gear b is arranged on the inner side of the anti-retreat sleeve 5, one end of the anti-retreat sleeve 5 is processed into an inner hexagonal countersunk hole, and the inner hexagonal countersunk hole has the same regular hexagon structure as the moving sleeve 4; the anti-moving sleeve 5 is sleeved on the power shaft core 3, an inner gear b of the anti-moving sleeve 5 is meshed with an outer gear a of the power shaft core 3, and an inner hexagonal countersunk hole of the anti-moving sleeve 5 is matched and fixed with a regular hexagon structure of the moving sleeve 4.
The pressurizing nut 6 is arranged on the external thread of the power shaft core 3, and the moving sleeve 4 and the anti-moving sleeve 5 are tightly pressed on the inner fixed bridging plate 1 through screwing pretightening force, so that the moving sleeve 4 is prevented from rotating and the anti-moving sleeve 5 is prevented from being separated.
A use method of a relay type bone moving device based on gear power comprises the following steps:
the method comprises the following steps: selecting a proper bone moving device according to the length of the bone 10 with bone defect, and sterilizing the internal fixed bridging plate 1, the sliding block 2, the power shaft core 3, the moving sleeve 4, the anti-withdrawal sleeve 5, the pressure nut 6 and the screw 7.
Step two: the internal fixation bridge plate 1 is bridge-fixed with screws 7 to both ends of a bone 10 with bone defect, and the bone defect area of the bone 10 is placed in the middle of the internal fixation bridge plate 1.
Step three: a straight line is selected at the metaphysis of the bone 10 as the resection line 12, and the area between the resection line 12 and the bone defect of the bone 10 is the free bone mass.
Step four: the sliding block 2 is fixed to the free bone block using screws 7.
Step five: the bone is cut along the cut line 12.
Step six: this implementation installs two sets of external rotation axis combiners, screws into the rotatory screw hole b9 of internal fixation bridging plate 1 both sides with power axle core 3.
Step seven: the moving sleeve 4 is sleeved into the power shaft core 3, the internal gear a of the moving sleeve 4 is meshed with the external gear a of the power shaft core 3, and the external gear b of the moving sleeve 4 is meshed with the linear rack of the sliding block 2.
Step eight: the anti-retreat sleeve 5 is sleeved on the power shaft core 3, an inner hexagonal countersunk hole of the anti-retreat sleeve 5 is matched and fixed with a regular hexagonal structure of the moving sleeve 4, and an inner gear b of the anti-retreat sleeve 5 is meshed with an outer gear a of the power shaft core 3.
Step nine: the pressurizing nut 6 is arranged on the external thread of the power shaft core 3, the moving sleeve 4 and the anti-moving sleeve 5 are tightly pressed on the inner fixed bridging plate 1 through screwing pretightening force, and the moving sleeve 4 is prevented from rotating and the anti-moving sleeve 5 is prevented from being separated.
Step ten: when the bone is moved, the pressure nut 6 and the anti-withdrawal sleeve 5 are taken down, the moving sleeve 4 is rotated to drive the sliding block 2, the movement of the sliding block 2 can drive the cut free bone blocks to move, and the space between the bone defect areas is reduced; after the bone is moved, the anti-back sleeve 5 and the compression nut 6 are installed according to the eighth step and the ninth step, and the new bone tissue is pulled out along the cutting line 12.
When the moving sleeve 4 is rotated, the moving sleeve 4 is always kept to be tightly attached to the internal fixed bridging plate 1, and the bone moving distance is read through the scale marks on the power shaft core 3;
after the moving is finished, installing an anti-withdrawal sleeve 5 and a pressure nut 6 according to the installation step eight and the installation step nine; if the moving resistance is large or the moving stroke is long, the number of the external rotating shaft combiner can be increased to move in a relay manner.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. A relay type bone moving device based on gear power is characterized by comprising an internal fixed bridge plate (1), a sliding block (2), a plurality of groups of external rotating shaft combiners and a plurality of screws (7);
the inner fixed bridging plate (1) is of a rectangular thin plate structure, and a plurality of threaded holes a (8) are formed in the inner fixed bridging plate (1); a sliding chute is arranged on the inner fixed bridging plate (1), and a plurality of groups of threaded holes b (9) are arranged on two sides of the sliding chute; the screw (7) passes through the threaded hole a (8) to fix the internal fixation bridging plate (1) and the bone (10) accompanied with bone defect, and the defect area of the bone (10) is positioned in the middle of the internal fixation bridging plate (1);
the external rotating shaft combiner comprises a power shaft core (3), a moving sleeve (4), an anti-withdrawal sleeve (5) and a pressure nut (6);
the power shaft core (3) is of a cylindrical structure, external threads are formed in two ends of the power shaft core, an external gear a is formed between the external threads, scale marks are arranged on the surface of the external gear a and used for reading a bone moving distance, and the power shaft core (3) is installed in a threaded hole b (9) of the internal fixed bridging plate (1);
one end of the peripheral surface of the moving sleeve (4) is provided with an external gear b, and the other end of the peripheral surface is processed into a regular hexagon structure; the inner circumferential surface of the moving sleeve (4) is provided with an internal gear a; the moving sleeve (4) is sleeved on the power shaft core (3), an internal gear a of the moving sleeve (4) is meshed with an external gear a of the power shaft core (3), and an external gear b of the moving sleeve (4) is close to the internal fixed bridging plate (1);
the sliding block (2) is arranged in a sliding chute of the inner fixed bridging plate (1), a linear rack is arranged on the sliding block (2) along the sliding direction, and the linear rack of the sliding block (2) is meshed with an external gear b of the moving sleeve (4); the sliding block (2) is provided with a plurality of threaded holes c (11), and the sliding block and the skeleton (10) are fixed by screws (7) penetrating through the threaded holes c (11);
an internal gear b is arranged on the inner side of the anti-retreat sleeve (5), one end of the anti-retreat sleeve (5) is processed into an inner hexagonal countersunk hole, and the inner hexagonal countersunk hole has the same regular hexagon structure as the moving sleeve (4); the anti-withdrawal sleeve (5) is sleeved on the power shaft core (3), an internal gear b of the anti-withdrawal sleeve (5) is meshed with an external gear a of the power shaft core (3), and an inner hexagonal countersunk hole of the anti-withdrawal sleeve (5) is matched and fixed with a regular hexagonal structure of the moving sleeve (4);
the pressurizing nut (6) is arranged on the external thread of the power shaft core (3), and the moving sleeve (4) and the anti-withdrawal sleeve (5) are tightly pressed on the internal fixed bridging plate (1) through screwing pretightening force, so that the moving sleeve (4) is prevented from rotating and the anti-withdrawal sleeve (5) is prevented from being separated.
2. The use method of the relay type bone moving device based on gear power as claimed in claim 1, characterized by comprising the following steps:
the method comprises the following steps: selecting a bone moving device according to the length of a bone (10) with bone defect, and disinfecting an internal fixed bridging plate (1), a sliding block (2), a power shaft core (3), a moving sleeve (4), an anti-withdrawal sleeve (5), a pressure nut (6) and a screw (7);
step two: the internal fixation bridging plate (1) and two ends of a bone (10) accompanied with bone defect are fixed in a bridging way by using screws (7), and the bone defect area of the bone (10) is arranged in the middle of the internal fixation bridging plate (1);
step three: selecting a straight line at the metaphysis of the bone (10) as a truncation line (12), and using the area between the truncation line (12) and the bone defect of the bone (10) as a free bone block;
step four: fixing the sliding block (2) and the free bone block by using a screw (7);
step five: cutting the bone along a cutting line (12);
step six: selecting the position and the number of the external rotating shaft combiners according to the moving force and the moving stroke length, and screwing the power shaft core (3) into a threaded hole b (9) of the internal fixed bridging plate (1) in a rotating manner;
step seven: sleeving a moving sleeve (4) into the power shaft core (3), meshing an internal gear a of the moving sleeve (4) with an external gear a of the power shaft core (3), and meshing an external gear b of the moving sleeve (4) with a linear rack of the sliding block (2);
step eight: sleeving an anti-withdrawal sleeve (5) on a power shaft core (3), matching and fixing an inner hexagonal countersunk hole of the anti-withdrawal sleeve (5) and a regular hexagonal structure of a moving sleeve (4), and meshing an inner gear b of the anti-withdrawal sleeve (5) with an outer gear a of the power shaft core (3);
step nine: a pressurizing nut (6) is arranged on the external thread of the power shaft core (3), the moving sleeve (4) and the anti-withdrawal sleeve (5) are tightly pressed on the inner fixed bridging plate (1) through screwing pretightening force, and the moving sleeve (4) is prevented from rotating and the anti-withdrawal sleeve (5) is prevented from being withdrawn;
step ten: when the bone is moved, the compression nut (6) and the anti-withdrawal sleeve (5) are taken down, the moving sleeve (4) is rotated, the sliding block (2) is further driven, the movement of the sliding block (2) can drive the cut free bone blocks to move, the space between the bone defect areas is reduced, and the moving distance data is read through the scale marks on the power shaft core (3); after the bone is moved, installing an anti-withdrawal sleeve (5) and a pressure nut (6) according to the eighth step and the ninth step; when the moving resistance is large or the moving stroke is long, the number of the external rotating shaft combiners can be increased for relay moving;
when the moving sleeve (4) is rotated, the moving sleeve (4) is always kept to be tightly attached to the internal fixed bridging plate (1), and the bone moving distance is read through the scale marks on the power shaft core (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235833.1A CN111297457A (en) | 2020-03-30 | 2020-03-30 | Relay type bone moving device based on gear power and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010235833.1A CN111297457A (en) | 2020-03-30 | 2020-03-30 | Relay type bone moving device based on gear power and using method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111297457A true CN111297457A (en) | 2020-06-19 |
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| CN202010235833.1A Pending CN111297457A (en) | 2020-03-30 | 2020-03-30 | Relay type bone moving device based on gear power and using method |
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Cited By (1)
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| CN117100376A (en) * | 2023-10-11 | 2023-11-24 | 陕西聚仁谷医疗器械有限公司 | Fracture minimally invasive reduction fixing system |
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