CN110897701A - Special-shaped block at distal end of tibia - Google Patents
Special-shaped block at distal end of tibia Download PDFInfo
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- CN110897701A CN110897701A CN201911370366.7A CN201911370366A CN110897701A CN 110897701 A CN110897701 A CN 110897701A CN 201911370366 A CN201911370366 A CN 201911370366A CN 110897701 A CN110897701 A CN 110897701A
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- locking screw
- inclination angle
- screw hole
- horizontal
- hole
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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
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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
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
Abstract
The embodiment of the invention relates to a special-shaped block at the far end of a tibia, which is of a plate-shaped structure and specifically comprises: first fixed part and second fixed part, first fixed part and second fixed part are connected: the inner surface of the first fixing part is an L-shaped arc surface; the top of the first fixing part is provided with a first top locking screw hole, a second top locking screw hole, a third top locking screw hole and a fourth top locking screw hole in sequence from the inner side to the outer side; the first inclined insertion locking screw hole is positioned in the middle of the first fixing part; the second inclined inserting locking screw hole is positioned at the lower part of the first inclined inserting locking screw hole; a lower locking screw hole located at the lower part of the first fixing part; the second fixing portion includes: the fixing screw hole is positioned on the surface of the second fixing part; the front side connecting screw hole is positioned at the front side position of the side surface of the second fixing part; the rear side is connected the screw, is located the rear side position of second fixed part side.
Description
Technical Field
The invention relates to the field of orthopedic medical instruments, in particular to a special-shaped block at the far end of a tibia.
Background
Tibia fracture is a common fracture type, and is particularly likely to occur in young people and osteoporosis elderly people, fracture of the tibia fracture causes fracture of bones, and bone fragments may be dislocated, and the part at the far end of the tibia is generally small in meat and thin in skin, so that treatment difficulty is caused.
In the traditional fracture treatment operation, the occurrence probability of complications is high, the existing tibia far-end fracture is fixed and arranged at the fracture position at the far end of the tibia by an external fixator, the external fixator is combined on the tibia by a bone nail, the external fixator is usually large in size, the external fixator is only suitable for specific fracture conditions, the tibia after the external fixator is healed, and the condition that the skeleton is regenerated is poor. The hospitalization time of the patient is long, and the recovery speed is slow.
Disclosure of Invention
The invention aims to provide a special-shaped block at the far end of a tibia, which is integrally designed, fixed in multiple points and different directions, convenient to operate, and capable of forming an integrally stable frame structure with a mounting component or a related product, and is firmer in fixation, better in attachment performance and wide in wrapping range.
In order to achieve the above object, the present invention provides a tibia distal end special-shaped block, wherein the tibia distal end special-shaped block 8 is a plate-shaped structure, and the tibia distal end special-shaped block 8 specifically includes: a first fixing portion 81 and a second fixing portion 82, the first fixing portion 81 and the second fixing portion 82 being connected:
the inner surface of the first fixing part 81 is an L-shaped arc surface which is matched with the curved surface at the upper end of the outer side of the tibia and is used for being fixed on the outer side of the tibia;
the top of the first fixing part 81 is provided with a first top locking screw hole 810, a second top locking screw hole 811, a third top locking screw hole 812 and a fourth top locking screw hole 813 in sequence from the inner side to the outer side;
when a first locking screw penetrates through the first top locking screw hole 810, a first upper screwing part of the first locking screw is in screwed connection with the first top locking screw hole 810, and a vertical direction inclination angle of a normal direction of a plane where the first locking screw and the second fixing part 82 are located is a first vertical inclination angle; the horizontal direction inclination angle of the normal direction of the plane where the first locking screw and the second fixing part 82 are located is a first horizontal inclination angle;
when a second locking screw penetrates through the second top locking screw hole 811, a second upper screwing part of the second locking screw is screwed with the second top locking screw hole 811, and a vertical direction inclination angle of a normal direction of a plane where the second locking screw and the second fixing part 82 are located is a second vertical inclination angle; the horizontal direction inclination angle of the normal direction of the plane where the second locking screw and the second fixing part 82 are located is a second horizontal inclination angle;
when a third locking screw penetrates through the third top locking screw hole 812, a third upper screwing part of the third locking screw is screwed with the third top locking screw hole 812, and a vertical direction inclination angle of a normal direction of a plane where the third locking screw and the second fixing part 82 are located is a third vertical inclination angle; the horizontal direction inclination angle of the normal direction of the plane where the third locking screw and the second fixing part 82 are located is a third horizontal inclination angle;
when a fourth locking screw penetrates through the fourth top locking screw hole 813, a fourth upper screwing part of the fourth locking screw is screwed with the fourth top locking screw hole 813, and a vertical direction inclination angle of a normal direction of a plane where the fourth locking screw and the second fixing part 82 are located is a fourth vertical inclination angle; the horizontal direction inclination angle of the plane where the fourth locking screw and the second fixing part 82 are located is a third horizontal inclination angle;
a first inclined insertion locking screw hole 814 which is located in the middle of the first fixing portion 81, and after a fifth locking screw penetrates through the first inclined insertion locking screw hole 814, a fifth upper screwing portion of the fifth locking screw is screwed with the first inclined insertion locking screw hole 814, and a vertical direction inclination angle of a normal direction of a plane where the fifth locking screw and the second fixing portion 82 are located is a fifth vertical inclination angle; a horizontal direction inclination angle of a normal direction of a plane where a fifth locking screw and the second fixing portion 82 are located is a fifth horizontal inclination angle, and the fifth horizontal inclination angle is intersected with the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively;
a second slanted insertion locking screw hole 815 located at a lower portion of the first slanted insertion locking screw hole 814, wherein when a sixth locking screw is inserted into the second slanted insertion locking screw hole 815, a sixth upper screwing portion of the sixth locking screw is screwed with the second slanted insertion locking screw hole 815, and a vertical direction inclination angle of a normal direction of a plane where the sixth locking screw and the second fixing portion 82 are located is a sixth vertical inclination angle; a horizontal direction inclination angle of a normal direction of a plane where the sixth locking screw and the second fixing portion 82 are located is a sixth horizontal inclination angle, and the sixth horizontal inclination angle is intersected with the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively;
a lower locking screw hole 816 positioned at a lower portion of the first fixing portion 81;
the second fixing portion 82 includes:
a fixing screw hole 820 located on the surface of the second fixing portion 82;
a front connection screw hole 821 located at the front side of the side surface of the second fixing portion 82, the front connection screw hole 821 having a first aperture;
a rear connection screw hole 822 at a rear side of a side surface of the second fixing portion 82, the rear connection screw hole 822 having a second hole diameter; the second aperture is smaller than the first aperture;
the first connecting rod is inserted into the front connecting screw hole 821, the second connecting rod is inserted into the rear connecting screw hole 822, and after the ninth locking screw penetrates through the fixing screw hole 820, the ninth upper screwing part of the seventh locking screw is screwed with the fixing screw hole 820, so that the front connecting screw hole 821 and the rear connecting screw hole 822 are extruded, and the first connecting rod and the second connecting rod are fixedly connected with the second fixing part 82.
Preferably, the distal tibial profile block 8 further comprises a positioning hole 817;
the positioning holes 817 include a first positioning hole 8170, a second positioning hole 8171, a third positioning hole 8172 and a fourth positioning hole 8173; the first positioning hole 8170, the second positioning hole 8171 and the third positioning hole 8172 are respectively positioned at the top end of the top locking screw hole, the fourth positioning hole 8173 is positioned between the top locking screw hole and the first oblique inserting locking screw hole 814, and the positioning hole 817 is used for temporarily fixing the tibia far-end special-shaped block in the operation or threading a suture or a cable.
Preferably, the sixth vertical inclination is greater than the first vertical inclination, the second vertical inclination, the third vertical inclination, the fourth vertical inclination, and the fifth vertical inclination.
Preferably, the first vertical inclination angle, the second vertical inclination angle, the third vertical inclination angle, the fourth vertical inclination angle, and the fifth vertical inclination angle are 7 °, and the sixth vertical inclination angle is 13 °.
Preferably, the fifth horizontal inclination is greater than the first horizontal inclination, the second horizontal inclination, the third horizontal inclination, the fourth horizontal inclination and the sixth horizontal inclination; the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are the same.
Preferably, the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are 25.7 °, the fifth horizontal inclination angle is 107.3 ° and the sixth horizontal inclination angle is 94.3 °.
Preferably, the curvature radius of the bottom edge of the horizontal tangent plane of the first fixing portion 81 between the third positioning hole 8172 and the fourth positioning hole 8173 is R1, and the value range of R1 is 28-32 mm.
Preferably, the first aperture of the front side connection screw hole and the second aperture of the rear side connection screw hole are equal or different.
According to the special-shaped block for the distal tibia, which is provided by the embodiment of the invention, the special-shaped block is integrally formed and designed and has a certain curvature, the attachment is ensured, the space structure of cross locking is realized by fixing screw holes in different directions, the connection firmness is improved, the wrapping range is wider, and the discomfort of a patient is relieved.
Drawings
Fig. 1 is a top view of a shaped block for the distal tibia provided by an embodiment of the present invention;
fig. 2 is a bottom view of a distal tibial profile block provided in accordance with an embodiment of the present invention;
fig. 3 is a distal end side view of a shaped block of the distal tibia provided by an embodiment of the present invention;
FIG. 4 is a cross-sectional view of portion A-A of FIG. 1;
fig. 5 is a cross-sectional view of portion B-B of fig. 1.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The embodiment of the invention provides a special-shaped block 8 for the far end of a tibia, which is applied to fixing of a fracture part in a tibia fracture operation.
Fig. 1 is a top view of a distal tibial profile block provided in an embodiment of the present invention, fig. 2 is a bottom view of the distal tibial profile block provided in an embodiment of the present invention, and fig. 3 is a distal end side view of the distal tibial profile block provided in an embodiment of the present invention; as shown in the drawings, the tibia distal end special-shaped block 8 according to the embodiment of the present invention is a plate-shaped structure, and the tibia distal end special-shaped block 8 specifically includes: a first fixing portion 81 and a second fixing portion 82.
The first fixing portion 81 is an L-shaped structure, and the first fixing portion 81 and the second fixing portion 82 are connected and integrally formed.
Preferably, in this embodiment, the plane where the second fixing portion 82 is located is set as a first plane, a plane parallel to the horizontal direction of the normal of the first plane is set as a second plane, and a plane parallel to the vertical direction of the normal of the first plane is set as a third plane; in the L-shaped structure of the first fixing portion 81, the side near the short side of the end portion is defined as the inner side of the tibia far-end special-shaped block 8, extends from the short side to the long side, and the side near the long side is defined as the outer side of the tibia far-end special-shaped block 8.
The outer surface of the first fixing part 81 is an arc-shaped curved surface with a certain radian, a plurality of screw holes and round holes are sequentially arranged on the arc-shaped curved surface from the inner side to the outer side, and the inner surface of the first fixing part 81 is an L-shaped arc-shaped surface which is matched with the curved surface at the upper end of the outer side of the tibia and is used for being fixed on the outer side of the tibia; specifically, a first top locking screw hole 810, a second top locking screw hole 811, a third top locking screw hole 812 and a fourth top locking screw hole 813 are sequentially formed at the top of the first fixing portion 81 from the inner side to the outer side.
The first top locking screw hole 810 is positioned at the end part, close to the L-shaped short side, of the top of the first fixing part 81, the inside of the first top locking screw hole 810 is specifically composed of an upper edge part and a lower edge part, the surface of the upper edge part is a smooth curved surface, the surface of the lower edge part is provided with fastening threads, and the first top locking screw hole 810 is used for attaching the inner surface of the first fixing part 81 to the bone surface of the upper end of the outer side of the tibia through a locking screw and fixing the inner surface of the first fixing;
fig. 2 is a bottom view of a distal tibial block according to an embodiment of the present invention, fig. 3 is a side view of a distal end of the distal tibial block according to an embodiment of the present invention, and referring to fig. 2 and 3, in a specific embodiment, after a first locking screw is inserted into a first top locking screw hole 810, a first upper screw part of the first locking screw is screwed with a lower edge part of the first top locking screw hole 810, and as the first upper screw part is screwed with a fastening screw and bites, a cap part of the first locking screw stays in an upper edge part of the first top locking screw hole 810, a screw part and a head part of the first locking screw are respectively inserted into a bone after passing through the first top locking screw hole 810, and during the insertion, an inclination angle formed by the first locking screw and a third plane is a first vertical inclination angle α, the first vertical inclination angle α is 7 °, and an inclination angle formed by the first locking screw and the second plane is a first horizontal inclination angle α ', and the first horizontal inclination angle α' is 25.7 °.
A second top locking screw hole 811 located above the first top locking screw hole 810 and between the first top locking screw hole 810 and the third top locking screw hole 812, similarly, the inside of the second top locking screw hole 811 has an upper edge portion and a lower edge portion as well as the inside of the first top locking screw hole 810, the second top locking screw hole 811 has the same function as the first top locking screw hole 810, and the first fixing portion 81 is attached and fixed to the bone surface at the upper end of the outer side of the tibia by a locking screw;
in a specific embodiment, after the second locking screw is inserted into the second top-locking screw hole 811, the second upper screw-connecting portion of the second locking screw is screwed with the lower edge portion of the second top-locking screw hole 811, and as the second upper screw-connecting portion is screwed with the fastening screw and bites, the screw cap portion of the second locking screw stays in the upper edge portion of the second top-locking screw hole 811, and the screw portion and the head portion of the second locking screw are inserted into the bone through the second top-locking screw hole 811, respectively, and during the insertion, the second locking screw and the third plane form an inclination angle of a second vertical inclination angle β, the second vertical inclination angle β is equal to the first vertical inclination angle α, and the second locking screw and the second plane form an inclination angle of a second horizontal inclination angle β ', the second horizontal inclination angle β ' is equal to the first horizontal inclination angle α '.
A third top locking screw hole 812 interposed between the second top locking screw hole 811 and the fourth top locking screw hole 813, and similarly, the inside of the third top locking screw hole 812 has an upper edge portion and a lower edge portion as in the first top locking screw hole 810, and the third top locking screw hole 812 has the same function as the first top locking screw hole 810, and both of them are adapted to the bone surface of the outer upper end of the tibia by the first fixing part 81 attached and fixed thereto by the locking screw;
in a specific embodiment, after the third locking screw is inserted into the third top-locking screw hole 812, the third upper screw-connecting portion of the third locking screw is screwed with the lower edge portion of the third top-locking screw hole 812, and as the third upper screw-connecting portion is screwed with the fastening screw and bites, the screw cap portion of the third locking screw stays in the upper edge portion of the third top-locking screw hole 812, and the screw portion and the head portion of the third locking screw are inserted into the bone after passing through the third top-locking screw hole 812, respectively, during the insertion process, the third locking screw and the third plane form an inclination angle γ that is the third vertical inclination angle γ and the first vertical inclination angle α are equal, and the third locking screw and the second plane form an inclination angle γ ' that is the third horizontal inclination angle γ ' and the first horizontal inclination angle α ' are equal.
A fourth top locking screw hole 813 provided above the third top locking screw hole 812, wherein the fourth top locking screw hole 813 has an upper edge and a lower edge as in the first top locking screw hole 810, and the fourth top locking screw hole 813 functions as in the first top locking screw hole 810, and the first fixing part 81 is attached to and fixed to the bone surface of the upper end of the outer side of the tibia by a locking screw;
in a specific embodiment, after the fourth locking screw is inserted into the fourth top-locking screw hole 813, the fourth upper screw-connecting portion of the fourth locking screw is screwed with the lower edge portion of the fourth top-locking screw hole 813, and as the fourth upper screw-connecting portion is screwed and bitten into the fastening screw, the screw cap portion of the fourth locking screw stays in the upper edge portion of the fourth top-locking screw hole 813, the screw portion and the head portion of the fourth locking screw are inserted into the bone through the fourth top-locking screw hole 813, respectively, and during the insertion process, the fourth locking screw and the third plane form an inclination angle of a fourth vertical inclination angle δ, which is equal to the first vertical inclination angle α, and the fourth locking screw and the second plane form an inclination angle of a fourth horizontal inclination angle δ ', which is equal to the first horizontal inclination angle α'.
As shown in fig. 2, the first vertical inclination angle α, the second vertical inclination angle β, the third vertical inclination angle γ, and the fourth vertical inclination angle δ are the same, and as shown in fig. 3, the first horizontal inclination angle α ', the second horizontal inclination angle β', the third horizontal inclination angle γ ', and the fourth horizontal inclination angle δ' are the same.
A first inclined insertion locking screw hole 814 which is located in the middle of the long side of the L-shape of the first fixing portion 81, and similarly, the inside of the first inclined insertion locking screw hole 814 has an upper edge portion and a lower edge portion as in the first top locking screw hole 810, and the first inclined insertion locking screw hole 814 has the same function as the first top locking screw hole 810, and the first fixing portion 81 is attached and fixed to the bone surface on the outer side of the tibia by a locking screw;
in a specific embodiment, after the fifth locking screw is inserted into the first inclined insertion locking screw hole 814, the fifth upper screw part of the fifth locking screw is screwed with the lower edge of the first inclined insertion locking screw hole 814, and as the fifth upper screw part is screwed and engaged with the fastening screw thread, the screw cap portion of the fifth locking screw stays in the upper edge of the first inclined insertion locking screw hole 814, the screw shaft portion and the screw head portion of the fifth locking screw are respectively inserted into the bone after passing through the first inclined insertion locking screw hole 814, during the insertion, the fifth locking screw and the third plane form an inclination angle of a fifth vertical inclination angle epsilon, the fifth vertical inclination angle epsilon and the first vertical inclination angle α are equal, the fifth locking screw and the second plane form an inclination angle of a fifth horizontal inclination angle epsilon ', the fifth horizontal inclination angle of a 107.3 deg., and the fifth horizontal inclination angle epsilon' intersects with the first horizontal inclination angle α ', the second horizontal inclination angle β', the third horizontal inclination angle gamma 'and the fourth horizontal inclination angle delta', respectively.
A second slanted insertion locking screw hole 815 which is arranged at a distance from the first slanted insertion locking screw hole 814 along the long side direction of the L-shape, is located at the lower part of the first slanted insertion locking screw hole 814, and similarly, the inside of the second slanted insertion locking screw hole 815 has an upper edge part and a lower edge part as well as the inside of the first top locking screw hole 810, and the second slanted insertion locking screw hole 815 has the same function as the first top locking screw hole 810, and both of them attach and fix the first fixing part 81 to the bone surface on the outer side of the tibia by a locking screw;
in a specific embodiment, after the sixth locking screw is inserted into the second angular insertion locking screw hole 815, the sixth upper screw portion of the sixth locking screw is screwed with the lower edge portion of the second angular insertion locking screw hole 815, and as the sixth upper screw portion is screwed with the fastening screw and bites, the screw cap portion of the sixth locking screw stays in the upper edge portion of the second angular insertion locking screw hole 815, the screw portion and the screw head portion of the sixth locking screw are inserted into the bone through the second angular insertion locking screw hole 815, respectively, and during the insertion process, the sixth locking screw and the third plane form an inclination angle of sixth vertical inclination angle ζ which is 13 °, the sixth locking screw and the second plane form an inclination angle of sixth horizontal inclination angle ζ 'which is 94.3 °, and the sixth horizontal inclination angle ζ' intersects with the first horizontal inclination angle α ', the second horizontal inclination angle β', the third horizontal inclination angle γ ', and the fourth horizontal inclination angle δ', respectively.
The sixth vertical inclination angle ζ is greater than the first vertical inclination angle α, the second vertical inclination angle β, the third vertical inclination angle γ, the fourth vertical inclination angle δ, and the fifth vertical inclination angle e as shown in fig. 2, and the fifth horizontal inclination angle e 'is greater than the first horizontal inclination angle α', the second horizontal inclination angle β ', the third horizontal inclination angle γ', the fourth horizontal inclination angle δ ', and the sixth horizontal inclination angle ζ' as shown in fig. 3.
The lower locking screw hole 816 is located below the L-shaped long side of the first fixing portion 81, and similarly, the lower locking screw hole 816 has an upper edge portion and a lower edge portion inside the same as the first top locking screw hole 810, and the lower locking screw hole 816 functions in the same way as the first top locking screw hole 810, and the first fixing portion 81 is fixed to the bone surface on the outer side of the tibia by the locking screw.
The lower locking screw hole 816 is used in conjunction with a locking screw in the same manner as the first top locking screw hole 810 is used in conjunction with a first locking screw and will not be described again.
A positioning hole 817, which is formed by a circular hole and is located on one side of the short side of the top L-shape of the first fixing portion 81, and specifically includes a first positioning hole 8170, a second positioning hole 8171, a third positioning hole 8172 and a fourth positioning hole 8173; the first positioning hole 8170, the second positioning hole 8171 and the third positioning hole 8172 are respectively positioned at the top ends of the first top locking screw hole 810, the second top locking screw hole 811, the third top locking screw hole 812 and the fourth top locking screw hole 813, the fourth positioning hole 8173 is positioned between the fourth top locking screw hole 813 and the first oblique insertion locking screw hole 814, the aperture of the positioning hole 817 is smaller than that of the locking screw holes, and the positioning hole 817 is used for temporarily fixing the special-shaped block at the far end of the tibia in the operation or threading a suture or a cable. Fig. 5 is a cross-sectional view of a portion B-B in fig. 1, and as shown in the drawing, the curvature radius of the arc-shaped surface of the inner surface of the first fixing portion 81 extending from the top to the middle gradually changes, and the curvature radius R1 of the bottom edge of the horizontal section between the third positioning hole 8172 and the fourth positioning hole 8173 is in a range of 35-40 mm.
Fig. 4 is a cross-sectional view of a portion a-a in fig. 1, and as shown in fig. 1 and 4, an outer surface of the second fixing portion 82 is configured as an arc-shaped curved surface having a certain radian, two fixing screw holes 820 are disposed in the arc-shaped curved surface and are spaced apart from each other at a certain distance along a long axis direction of the second fixing portion 82, an interior of the fixing screw holes 820 is specifically configured by an upper edge 8201 and a lower edge 8202, a surface of the upper edge 8201 is a smooth curved surface and is matched with an upper screw portion of a locking screw, a surface of the lower edge 8202 is provided with a fastening screw, and an aperture of the fixing screw; the inner surface of the second fixing part 82 is also provided with an arc-shaped curved surface with a certain radian on one side which is jointed with the tibia backbone, and the radian of the arc-shaped curved surface of the inner surface of the second fixing part 82 can be adapted according to different patients and different fracture parts, so that the special-shaped block 8 at the far end of the tibia is more jointed with the surface of the tibia; the side surfaces of the second fixing portion 82 are respectively provided with a front-side connection screw hole 821 and a rear-side connection screw hole 822, the front-side connection screw hole 821 and the rear-side connection screw hole 822 are arranged in parallel along the long axis direction of the second fixing portion 82 and are respectively arranged at two sides of the fixing screw hole 820, and the front-side connection screw hole 821 and the rear-side connection screw hole 822 are used for firmly connecting the connecting rod 2 and the tibia far-end special-shaped block 8 together through a locking screw.
A front connection screw hole 821 located at the front side of the side surface of the second fixing portion 82, the front connection screw hole 821 having a first hole diameter D1;
a rear connection screw hole 822 located at a rear side of a side surface of the second fixing portion 82, the rear connection screw hole 822 having a second hole diameter D2;
wherein the first and second apertures D1 and D2 are equal or different, and the different apertures of the anterior and posterior connecting screws 821 and 822 are specifically designed to better conform to the shape and characteristics of the asian bones.
The second fixing portion 82 firmly fixes the connecting rod 2 inside the second fixing portion 82 by a locking screw; the intersection of the front side connection screw hole 821 and the rear side connection screw hole 822 with the fixing screw hole 820 has a cross hole 823, and the cross hole 823 is mainly used for pressing the connecting rod 2 by a locking screw, thereby fixing the connecting rod 2 in the second fixing portion 82.
In a specific embodiment, the first connecting rod 20 is inserted into the front connecting screw hole 821, the second connecting rod 21 is inserted into the rear connecting screw hole 822, after two seventh locking screws are respectively inserted into the two fixing screw holes 820, the seventh upper screw portion of the seventh locking screw is screwed with the lower edge 8202 of the fixing screw hole 820, as the seventh upper screw portion is screwed and bitten with the fastening screw, the screw cap portion of the seventh locking screw stays in the upper edge 8201 of the fixing screw hole 820, the first connecting rod 20 and the second connecting rod 21 are fixedly connected with the second fixing portion 82 through the cross hole 823 while respectively pressing the front connecting screw hole 821 and the rear connecting screw hole 822, and the screw portion and the nail head portion of the seventh locking screw are respectively inserted into the bone after passing through the fixing screw hole 820.
The above is a description of the components of the tibial distal special-shaped block and the connection relationship between them provided by the embodiment of the invention, and the following is a detailed description of the usage of the tibial distal special-shaped block with reference to fig. 1, fig. 2 and fig. 4;
when a doctor uses the special-shaped block at the far end of the tibia to fix a fracture part in a tibia fracture operation, the locking screw 1 and the connecting rod 2 need to be matched for use. The process used in conjunction is described in detail below.
In a specific tibial fracture operation, a surgeon aligns and fits the first fixing portion 81 of the distal tibial end special-shaped block 8 with the bone surface of the upper end of the outer side of the tibia, inserts the locking screws 1 into the first top locking screw hole 810, the second top locking screw hole 811, the third top locking screw hole 812 and the fourth top locking screw hole 813, screws the upper screw portion of the locking screw with the lower edge portion of the locking screw hole after the locking screw is inserted into the locking screw hole, the screw cap portion of the locking screw stays in the upper edge portion of the locking screw hole as the upper screw portion is screwed and bitten with the fastening screw, the screw portion and the head portion of the locking screw are inserted into the bone after passing through the locking screw hole, finally the first fixing portion 81 of the distal tibial end special-shaped block 8 is fixed on the bone surface of the upper end of the outer side of the tibia, inserts the first connecting rod 20 and the second connecting rod 21 into the anterior connecting screw hole 821 and the posterior connecting screw hole 822 in sequence, meanwhile, the locking screws are respectively arranged in the two fixing screw holes 820, after the locking screws are arranged in the fixing screw holes 820, the upper screwing parts of the locking screws are screwed with the lower edges 8202 of the fixing screw holes 820, along with the screwing and the fastening screw threads, the screw cap parts of the locking screws are stopped in the upper edges 8201 of the fixing screw holes 820, the front connecting screw holes 821 and the rear connecting screw holes 822 are respectively extruded, meanwhile, the first connecting rod 20 and the second connecting rod 21 are fixedly connected with the second fixing part 82 through the cross holes 823, the screw rod parts and the screw head parts of the locking screws respectively penetrate through the fixing screw holes 820 and then are implanted into the bone, and therefore, the special-shaped block 8 at the far end of the tibia can be completely fixed with the far end of the tibia.
According to the special-shaped block for the distal tibia, which is provided by the embodiment of the invention, the special-shaped block is integrally formed and designed and has a certain curvature, the attachment is ensured, the space structure of cross locking is realized by fixing screw holes in different directions, the connection firmness is improved, the wrapping range is wider, and the discomfort of a patient is relieved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a distal tibial dysmorphism piece, its characterized in that, distal tibial dysmorphism piece is platelike structure, distal tibial dysmorphism piece specifically includes: first fixed part and second fixed part, first fixed part and second fixed part are connected:
the inner surface of the first fixing part is an L-shaped arc surface, is matched with the curved surface at the upper end of the outer side of the tibia and is used for being fixed on the outer side of the tibia;
the top of the first fixing part is provided with a first top locking screw hole, a second top locking screw hole, a third top locking screw hole and a fourth top locking screw hole in sequence from the inner side to the outer side;
when a first locking screw penetrates through the first top locking screw hole, a first upper screwing part of the first locking screw is in screwed connection with the first top locking screw hole, and a normal vertical direction inclination angle of a plane where the first locking screw and the second fixing part are located is a first vertical inclination angle; the normal horizontal direction inclination angle of the plane where the first locking screw and the second fixing part are located is a first horizontal inclination angle;
when a second locking screw penetrates through the second top locking screw hole, a second upper screwing part of the second locking screw is in screwed connection with the second top locking screw hole, and a normal vertical direction inclination angle of a plane where the second locking screw and the second fixing part are located is a second vertical inclination angle; the normal horizontal direction inclination angle of the plane where the second locking screw and the second fixing part are located is a second horizontal inclination angle;
when a third locking screw penetrates through the third top locking screw hole, a third upper screwing part of the third locking screw is in screwed connection with the third top locking screw hole, and a normal vertical direction inclination angle of a plane where the third locking screw and the second fixing part are located is a third vertical inclination angle; the normal horizontal direction inclination angle of the plane where the third locking screw and the second fixing part are located is a third horizontal inclination angle;
when a fourth locking screw penetrates through the fourth top locking screw hole, a fourth upper screwing part of the fourth locking screw is in screwed connection with the fourth top locking screw hole, and a normal vertical direction inclination angle of a plane where the fourth locking screw and the second fixing part are located is a fourth vertical inclination angle; the normal horizontal direction inclination angle of the plane where the fourth locking screw and the second fixing part are located is a fourth horizontal inclination angle;
the first oblique inserting locking screw hole is positioned in the middle of the first fixing part, after a fifth locking screw penetrates through the first oblique inserting locking screw hole, a fifth upper screwing part of the fifth locking screw is in screwed connection with the first oblique inserting locking screw hole, and a normal vertical direction inclination angle of a plane where the fifth locking screw and the second fixing part are positioned is a fifth vertical inclination angle; a normal horizontal direction inclination angle of a plane where a fifth locking screw and the second fixing part are located is a fifth horizontal inclination angle, and the fifth horizontal inclination angle is intersected with the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively;
the second inclined inserting locking screw hole is positioned at the lower part of the first inclined inserting locking screw hole, when a sixth locking screw penetrates through the second inclined inserting locking screw hole, a sixth upper screwing part of the sixth locking screw is in screwed connection with the second inclined inserting locking screw hole, and a normal vertical direction inclination angle of a plane where the sixth locking screw and the second fixing part are positioned is a sixth vertical inclination angle; a normal horizontal direction inclination angle of the sixth locking screw and a plane where the second fixing part is located is a sixth horizontal inclination angle, and the sixth horizontal inclination angle is intersected with the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle respectively;
a lower locking screw hole located at the lower part of the first fixing part;
the second fixing portion includes:
the fixing screw hole is positioned on the surface of the second fixing part;
the front side connecting screw hole is positioned at the front side position of the side surface of the second fixing part, and the aperture of the front side connecting screw hole is a first aperture;
the rear side connecting screw hole is positioned at the rear side of the side surface of the second fixing part, and the aperture of the rear side connecting screw hole is a second aperture;
and the first connecting rod is inserted into the front side connecting screw hole, the second connecting rod is inserted into the rear side connecting screw hole, and after the ninth locking screw penetrates through the fixing screw hole, the seventh upper screwed part of the seventh locking screw is in threaded connection with the fixing screw hole, so that the front side connecting screw hole and the rear side connecting screw hole are extruded, and the first connecting rod and the second connecting rod are fixedly connected with the second fixing part.
2. The distal tibial profile block of claim 1, further comprising a positioning hole;
the positioning holes comprise a first positioning hole, a second positioning hole, a third positioning hole and a fourth positioning hole; the first positioning hole, the second positioning hole and the third positioning hole are respectively positioned at the top end of the top locking screw hole, the fourth positioning hole is positioned between the top locking screw hole and the first oblique inserting locking screw hole, and the positioning holes are used for temporarily fixing the special-shaped block at the far end of the tibia in the operation or threading a suture or a cable.
3. The distal tibial profile block of claim 1, wherein said sixth vertical inclination is greater than said first vertical inclination, said second vertical inclination, said third vertical inclination, said fourth vertical inclination, and said fifth vertical inclination.
4. The distal tibial profile block of claim 1, wherein said first, second, third, fourth and fifth vertical inclination angles are 7 ° and said sixth vertical inclination angle is 13 °.
5. The distal tibial profile block of claim 1, wherein said fifth horizontal inclination is greater than said first horizontal inclination, said second horizontal inclination, said third horizontal inclination, said fourth horizontal inclination, and said sixth horizontal inclination; the first horizontal inclination angle, the second horizontal inclination angle, the third horizontal inclination angle and the fourth horizontal inclination angle are the same.
6. The distal tibial profile block of claim 1, wherein said first horizontal inclination, said second horizontal inclination, said third horizontal inclination, and said fourth horizontal inclination are 25.7 °, said fifth horizontal inclination is 107.3 °, and said sixth horizontal inclination is 94.3 °.
7. The distal tibial profile block of claim 1, wherein a radius of curvature of a bottom edge of a horizontal section between said third positioning hole and said fourth positioning hole of said first fixing portion is R1, and a value of said R1 is in a range of 28-32 mm.
8. The distal tibial profile block of claim 1, wherein said first aperture of said anterior connection screw and said second aperture of said posterior connection screw are equal or unequal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370366.7A CN110897701A (en) | 2019-12-26 | 2019-12-26 | Special-shaped block at distal end of tibia |
| PCT/CN2020/137879 WO2021129547A1 (en) | 2019-12-26 | 2020-12-21 | Special-shaped block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370366.7A CN110897701A (en) | 2019-12-26 | 2019-12-26 | Special-shaped block at distal end of tibia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110897701A true CN110897701A (en) | 2020-03-24 |
Family
ID=69827831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911370366.7A Pending CN110897701A (en) | 2019-12-26 | 2019-12-26 | Special-shaped block at distal end of tibia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110897701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021129547A1 (en) * | 2019-12-26 | 2021-07-01 | 天津市威曼生物材料有限公司 | Special-shaped block |
-
2019
- 2019-12-26 CN CN201911370366.7A patent/CN110897701A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021129547A1 (en) * | 2019-12-26 | 2021-07-01 | 天津市威曼生物材料有限公司 | Special-shaped block |
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