Spherical osteotomy oscillating saw head and spherical osteotomy oscillating saw

Abstract

The present invention relates to a spherical osteotomy swing saw head, comprising: a connecting device; a first saw blade, the first end of the first saw blade is connected to the connecting device; a second saw blade, the first end of the second saw blade is connected to the second end of the first saw blade, the second saw blade is connected to the first saw blade in an "L" shape, and the second end of the second saw blade is provided with a plurality of saw teeth; the inner surfaces of the first saw blade and the second saw blade form a spherical arc surface; the connecting device, the first saw blade and the second saw blade are integrally formed. It also relates to a spherical osteotomy swing saw. Its advantage is that by forming a spherical arc surface on the inner surfaces of the first saw blade and the second saw blade, spherical osteotomy is achieved under the action of reciprocating power, so that the osteotomy end is spherical, and the osteotomy end surface is smooth and flat; it is conducive to fine adjustment during osteotomy surgery, so that the contact surface of the osteotomy end surface is maximized, which is conducive to fixation after osteotomy and reduces related complications.

Description

Technical Field

[0001] The invention relates to the technical field of osteotomy devices, and in particular to a spherical osteotomy oscillating saw head and a spherical osteotomy oscillating saw. Background Art

[0002] Osteotomy is a common surgical procedure in orthopedics. Existing osteotomy is mostly performed with a conventional osteotomy oscillating saw, and the osteotomy plane is usually flat. This osteotomy method usually has certain problems. For example, when adjusting the angle, a gap usually occurs between the osteotomy ends, which leads to an uneven osteotomy plane, which can easily cause poor fracture healing, loose fixation, and breakage of the fixation.

[0003] In order to solve the above problems, the existing osteotomy oscillating saw is improved to obtain a semicircular osteotomy saw. However, due to the poor strength distribution of the structure of this osteotomy saw, the osteotomy saw may break during osteotomy. In addition, the semicircular osteotomy saw cannot be adjusted at a fine angle.

[0004] Therefore, there is an urgent need for an osteotomy oscillating saw that can solve the above problems, realize spherical osteotomy, and make the osteotomy end surface smooth and flat. Summary of the invention

[0005] The purpose of the present invention is to provide a spherical osteotomy swing saw head in view of the deficiencies in the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A spherical osteotomy swing saw head, characterized in that it comprises:

[0008] Connecting device;

[0009] a first saw blade, wherein a first end of the first saw blade is connected to the connecting device;

[0010] a second saw blade, wherein a first end of the second saw blade is connected to a second end of the first saw blade, the second saw blade is connected to the first saw blade in an "L" shape, and a plurality of saw teeth are disposed on the second end of the second saw blade;

[0011] The inner surfaces of the first saw blade and the second saw blade form a spherical arc surface;

[0012] The connecting device, the first saw blade and the second saw blade are integrally formed.

[0013] Preferably, the outer end surface of the second saw blade is a curved surface.

[0014] Preferably, the central angle of the outer end surface of the second saw blade is less than 90°.

[0015] Preferably, the connecting device comprises:

[0016] A first connecting device, the first connecting device is cylindrical, and the second end of the first connecting device is connected to the first end of the first saw blade;

[0017] The second connecting device is in a triangular shape, and the second end of the second connecting device is connected to the first end of the first connecting device.

[0018] Preferably, a radial distance between an axis center of the second connecting device and an edge of the second connecting device is smaller than a radial distance between an axis center of the first connecting device and an edge of the first connecting device.

[0019] Preferably, the second connecting device further comprises a connecting hole, and the connecting hole is coaxially arranged with the second connecting device.

[0020] Preferably, the first end of the second connecting device is spherical.

[0021] Preferably, three edges of the second connecting device protrude toward the axis of the second connecting device.

[0022] Preferably, the angle formed by the connection between the first saw blade and the connecting device is an obtuse angle.

[0023] Preferably, the angle formed by the connection between the first saw blade and the second saw blade is an acute angle, a right angle or an obtuse angle.

[0024] Preferably, the connecting device, the first saw blade and the second saw blade are made of stainless steel.

[0025] Preferably, the first end of the first saw blade is in a shape that changes from narrow to wide toward the second end of the first saw blade.

[0026] Preferably, the first end of the first saw blade is trapezoidal, and the second end of the first saw blade is rectangular.

[0027] A spherical osteotomy oscillating saw comprises the spherical osteotomy oscillating saw head as described above.

[0028] The present invention adopts the above technical solution, and has the following technical effects compared with the prior art:

[0029] The spherical osteotomy swing saw head of the present invention forms a spherical arc surface on the inner surfaces of the first saw blade and the second saw blade, and realizes spherical osteotomy under the action of reciprocating power, so that the osteotomy end is spherical and the osteotomy end surface is smooth and flat; it is conducive to fine adjustment during osteotomy surgery, maximizes the contact area of ​​the osteotomy end surface, is conducive to fixation after osteotomy, and reduces related complications; spherical arc surfaces with different diameters can be designed according to different bone parts, so that it can be applied to bones in various places; it has a simple structure, is easy to operate, and has broad clinical application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view of an exemplary embodiment of the present invention.

[0031] Figure 2 is a top view of an exemplary embodiment of the present invention.

[0032] Figure 3 It is a right side view of an exemplary embodiment of the present invention.

[0033] Figure 4 is a perspective view of an exemplary embodiment of the present invention.

[0034] Figure 5 is a schematic diagram of a connecting device and a first saw blade according to an exemplary embodiment of the present invention.

[0035] Figure 6 Schematic diagram of a first saw blade and a second saw blade according to an exemplary embodiment of the present invention.

[0036] Figure 7 is a cross-sectional view of a second saw blade (first saw blade) according to an exemplary embodiment of the present invention.

[0037] The reference numerals are: connecting device 1; first saw blade 2; second saw blade 3; first connecting device 11; second connecting device 12; connecting hole 13. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0041] An exemplary embodiment of the present invention is as follows Figures 1 to 4 As shown, a spherical osteotomy swing saw head includes a connecting device 1, a first saw blade 2 and a second saw blade 3. The connecting device 1, the first saw blade 2 and the second saw blade 3 are connected in sequence, and the connecting device 1, the first saw blade 2 and the second saw blade 3 are integrally formed.

[0042] The connecting device 1 comprises a first connecting device 11 and a second connecting device 12. The first end of the first connecting device 11 is connected to the second end of the second connecting device 12. The first connecting device 11 and the second connecting device 12 are coaxially arranged. The first connecting device 11 is cylindrical and the second connecting device 12 is triangular.

[0043] The radial distance between the axis center and the edge of the first connecting device 11 (ie, the radius of the first connecting device 11 ) is greater than the radial distance between the axis center and the edge of the second connecting device 12 .

[0044] Further, the second connecting device 12 is a circular triangle, that is, the three corners of the second connecting device 12 are circular arcs.

[0045] Furthermore, the three sides of the second connecting device 12 may also be protruding from the outside to the inside (axis).

[0046] A connecting hole 13 is also provided on the second connecting device 12 , and the connecting hole 13 is coaxially arranged with the second connecting device 12 .

[0047] Furthermore, the connecting hole 13 passes through the second connecting device 12 .

[0048] Furthermore, the connecting hole 13 also passes through the first connecting device 11 .

[0049] Furthermore, the diameter of the connecting hole 13 is smaller than or equal to the distance between two ends of the arc of the second connecting device 12 .

[0050] Furthermore, the first end of the second connecting device 12 is spherical.

[0051] The first end of the first saw blade 2 is connected to the second end of the connecting device 1 , that is, the first end of the first saw blade 2 is connected to the second end of the first connecting device 11 .

[0052] The shape of the first saw blade 2 is a shape that becomes wider from the first end to the second end (i.e., the longitudinal section of the first saw blade 2). Specifically, the first end of the first saw blade 2 is a trapezoid, and the second end of the first saw blade 2 is a rectangle, and the length of the upper base of the trapezoid at the first end is equal to the diameter of the first connecting device 11, and the length of the lower base of the trapezoid at the first end is equal to the length of one side of the rectangle at the second end (the side connecting the rectangle and the trapezoid).

[0053] The angle α formed by the first saw blade 2 and the connecting device 1 is an obtuse angle.

[0054] Furthermore, the angle α ranges from 90° to 150°, preferably ranges from 90° to 135°, and more preferably ranges from 120° to 135°.

[0055] In this embodiment, the angle α is 120° or 135°.

[0056] Furthermore, the first saw blade 2 has a certain curvature, that is, the first saw blade 2 is arc-shaped (that is, the cross-section of the first saw blade 2), and the straight lines (or planes) where the centers of the arcs of the first saw blade 2 are located are coplanar with the straight lines (or planes) where the axis centers of the connecting device 1 (that is, the first connecting device 11 and the second connecting device 12) are located.

[0057] Furthermore, the arc center angle γ of the first saw blade 2 is less than or equal to 90°.

[0058] Furthermore, the arc center angle γ of the first saw blade 2 is 15° to 60°, preferably 30° to 45°.

[0059] Specifically, from the perspective of the right side view, the first saw blade 2 and the connecting device 1 are designed to be concentric circles.

[0060] The first end of the second saw blade 3 is connected to the second end of the first saw blade 2 , and the second saw blade 3 and the first saw blade 2 form an “L”-shaped structure.

[0061] Furthermore, the angle β formed by the connection between the first saw blade 2 and the second saw blade 3 is a right angle, an acute angle, or an obtuse angle.

[0062] Furthermore, the angle β ranges from 60° to 120°, and preferably ranges from 75° to 110°.

[0063] In this embodiment, the angle β is 75°, 90°, or 105°.

[0064] The second end of the second saw blade 3 is evenly provided with saw teeth.

[0065] The second saw blade 3 has a certain curvature, that is, the outer end surface of the second saw blade 3 is an arc surface (i.e., the cross section of the second saw blade 3). And the straight line (or plane) where the centers of the arcs of the second saw blade 3 are located is coplanar with the straight line (or plane) where the centers of the arcs of the first saw blade 2 are located.

[0066] Furthermore, a central angle γ of an outer end surface (ie, an arc-shaped surface) of the second saw blade 3 is less than or equal to 90°.

[0067] Furthermore, the central angle γ of the outer end surface (ie, the arc surface) of the second saw blade 3 is 15° to 60°, preferably 30° to 45°.

[0068] The inner surface of the structure formed by connecting the first saw blade 2 and the second saw blade 3 is a spherical arc surface, and the straight line (or plane) where the center of the spherical arc surface lies is coplanar with the straight lines (or planes) where the centers of the arcs of the first saw blade 2 and the straight lines (or planes) where the centers of the arcs of the second saw blade 3 lie.

[0069] Furthermore, the radius of the spherical arc surface is 1 cm to 6 cm.

[0070] Furthermore, the radius of the spherical arc surface is 1 cm or 4 cm.

[0071] Furthermore, in terms of the cross section of the second saw blade 3 , the radius of the arc of the outer end surface of the second saw blade 3 is greater than the radius of the spherical arc surface.

[0072] Likewise, in the cross section of the first saw blade 2 , the radius of the arc of the first saw blade 2 is greater than the radius of the spherical arc surface.

[0073] Furthermore, in the cross section of the second saw blade 3, the width may gradually increase from the middle to the sides, that is, the shape may be narrow in the middle and wide on both sides.

[0074] Similarly, the cross section of the first saw blade 2 may gradually widen from the middle to both sides, that is, form a shape that is narrow in the middle and wide on both sides.

[0075] The present embodiment also relates to a spherical osteotomy oscillating saw, comprising the above-mentioned spherical osteotomy oscillating saw head and an oscillating saw body, wherein the oscillating saw body comprises a casing, a motor and a rotating shaft, wherein the motor is arranged in the casing, the rotating shaft is connected to the motor, and the spherical osteotomy oscillating saw is connected to the rotating shaft.

[0076] The method of using the present invention is as follows: connect the spherical osteotomy oscillating saw head to the oscillating saw body, and connect the second connecting device 12 to the rotating shaft; turn on the motor, the motor drives the rotating shaft to rotate, and then drives the second connecting device 12 to rotate (the general rotation angle range is 1° to 90°), so that the spherical osteotomy oscillating saw head rotates 1° to 5° on both sides with the connecting device 1 as the axis, that is, with the connecting device 1 as the axis, first rotate 1° to 5° to one side, then reset, and then rotate 1° to 5° to the other side; under the action of rotation, the spherical arc surface of the inner surface of the first saw blade 2 and the second saw blade 3 forms a spherical cross-section for the osteotomy position, and the spherical cross-section is flat; in addition, the spherical cross-section of the osteotomy position can be changed by adjusting the angle.

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A spherical osteotomy swing saw head, characterized in that: include: Connecting device (1); A first saw blade (2), wherein a first end of the first saw blade (2) is connected to the connecting device (1); a second saw blade (3), wherein a first end of the second saw blade (3) is connected to a second end of the first saw blade (2), the second saw blade (3) is connected to the first saw blade (2) in an "L" shape, and a plurality of saw teeth are provided at the second end of the second saw blade (3); The inner surfaces of the first saw blade (2) and the second saw blade (3) form a spherical arc surface; The connecting device (1), the first saw blade (2) and the second saw blade (3) are integrally formed; Wherein, the angle formed by the connection between the first saw blade (2) and the second saw blade (3) is an acute angle, a right angle or an obtuse angle; Wherein, the connecting device (1) comprises: A first connecting device (11), the first connecting device (11) is cylindrical, and the second end of the first connecting device (11) is connected to the first end of the first saw blade (2); A second connecting device (12), the second connecting device (12) is in a triangular shape, and a second end of the second connecting device (12) is connected to a first end of the first connecting device (11); The first end of the first saw blade (2) is a trapezoid, the second end of the first saw blade (2) is a rectangle, the length of the upper base of the trapezoid at the first end is equal to the diameter of the first connecting device (11), and the length of the lower base of the trapezoid at the first end is equal to the length of one side of the rectangle at the second end.

2. The spherical osteotomy oscillating saw head according to claim 1, characterized in that: The outer end surface of the second saw blade (3) is an arc-shaped surface.

3. The spherical osteotomy oscillating saw head according to claim 2, characterized in that: The central angle of the outer end surface of the second saw blade (3) is less than 90°.

4. The spherical osteotomy oscillating saw head according to claim 1, characterized in that: The radial distance between the axis of the second connecting device (12) and the edge of the second connecting device (12) is smaller than the radial distance between the axis of the first connecting device (11) and the edge of the first connecting device (11).

5. The spherical osteotomy oscillating saw head according to claim 1, characterized in that: The second connecting device (12) further comprises a connecting hole (13), wherein the connecting hole (13) is coaxially arranged with the second connecting device (12).

6. The spherical osteotomy oscillating saw head according to claim 1, characterized in that: The angle formed by the connection between the first saw blade (2) and the connecting device (1) is an obtuse angle.

7. A spherical osteotomy oscillating saw, comprising the spherical osteotomy oscillating saw head according to any one of claims 1 to 6.

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