CN217696724U

CN217696724U - Bone cutting device

Info

Publication number: CN217696724U
Application number: CN202221467485.1U
Authority: CN
Inventors: 江东; 程相允
Original assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Current assignee: Peking University Third Hospital Peking University Third Clinical Medical College
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-11-01
Anticipated expiration: 2032-06-13

Abstract

The utility model provides a bone cutting device, include: the bone cutting device comprises a hand piece, a bone cutting piece and a rotary fixing piece, wherein the hand piece is connected with the rotary fixing piece, and the bone cutting piece is connected with the rotary fixing piece in a sliding manner through a connecting rod; the rotary fixing part is movably connected with the scale guide pin, so that the rotary fixing part moves up and down along the length direction of the scale guide pin and rotates along the circumferential direction of the scale guide pin. The advantages are that: avoid the tradition to use the bone to bore can't carry out the pertinence to the subchondral bone cyst and freshen the defect of handling and can only carry out the horizontal shape contact with the bone contact surface for this application compares with prior art, can carry out the pertinence to the subchondral bone cyst and freshen the processing, and because the utility model discloses structural characteristic can carry out the pertinence cutting of bone face according to the bone defect condition and the customization false body shape.

Description

Bone cutting device

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a bone cutting device.

Background

The focal osteochondral injury of the knee joint is a common disease, can cause pain and limited movement of the knee joint of a patient, and seriously influences the life quality of the patient. If the injury is in an early stage and has a small area, conservative treatments such as oral non-steroidal anti-inflammatory drugs, rehabilitation exercise and the like can be adopted; if conservative treatment fails, surgical approaches such as microfracture, drilling, or osteochondral transplantation are generally considered. However, the treatment is limited for the middle-aged and the elderly who fail to treat the disease in the conservative or non-conservative way and have large focus. Partial prosthetic replacements that have emerged in recent years may be used in the treatment of severe focal osteochondral injuries to such joints.

For partial surface prosthesis replacement surgery, bone drills are mostly used for treating bone tracts before the prosthesis implantation process at present. However, the bone drill cannot perform targeted fresh treatment on the subchondral bone cyst, is not beneficial to the fusion of the implanted prosthesis and the surrounding bone, and is easy to cause focus residue and cyst recurrence in the later period. In addition, the prosthesis drilled by the bone drill is mostly in a horizontal shape, and if a customized prosthesis with an irregular shape is implanted, the bone drill cannot perform targeted cutting of the bone surface according to the defect condition and the shape of the customized prosthesis.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bone cutting device can pertinence eliminate bone cyst to according to the condition of defect and the customized partial surface false body shape of surface carry out the pertinence cutting of drumhead.

In order to realize the purpose of the utility model, the utility model provides a following technical scheme:

a bone cutting mechanism comprising: the bone cutting device comprises a hand piece, a bone cutting piece and a rotary fixing piece, wherein the hand piece is connected with the rotary fixing piece, and the bone cutting piece is connected with the rotary fixing piece in a sliding manner through a connecting rod;

the rotary fixing piece is movably connected with the scale guide pin, so that the rotary fixing piece can move up and down along the length direction of the scale guide pin and rotate along the circumferential direction of the scale guide pin.

Preferably, the rotating fixing part comprises a fixing ring and a supporting rod, and one end of the hand piece is connected with the fixing ring, so that the hand piece moves along with the movement of the rotating fixing part; the one end of bracing piece connect in gu fixed ring's inner wall, the other end is directional gu fixed ring's centre of a circle direction is through bracing piece joint scale guide pin, makes the bracing piece removes along scale guide pin length direction to it is rotatory along the circumferencial direction of scale guide pin.

Preferably, be equipped with the shrinkage pool that is used for the card to establish the scale guide pin on the bracing piece, make solid fixed ring is in the effect of handheld piece drives the bracing piece moves up and down along the length direction of scale guide pin to the circumferencial direction of following the scale guide pin is rotatory.

Preferably, the bone cutting member comprises a connecting pipe, a bone cutting knife and a connecting rod, one end of the connecting pipe is connected with the power source, the other end of the connecting pipe is connected with the bone cutting knife, and two ends of the connecting rod are respectively fixedly connected with the bone cutting knife, the other end of the connecting rod is connected with the fixing ring in a sliding manner, so that the bone cutting knife is connected with the fixing ring in a sliding manner in the circumferential direction through the connecting rod.

Preferably, the bone cutting member further comprises a moving ring sleeved on the fixing ring, so that after the connecting rod is connected with the moving ring, the moving ring slides along the circumferential direction of the fixing ring to drive the bone cutting knife to move along the circumferential direction of the fixing ring.

Preferably, the moving ring is provided with a screw hole for a screw to pass through, and the screw is inserted and then abuts against the fixing ring so as to fix the fixing ring and the moving ring.

The utility model discloses a bone cutting device, its advantage: avoid tradition to use the bone to bore can't carry out the pertinence to the subchondral bone cyst and freshen the defect of handling and can only carry out the horizontal shape contact with the bone contact surface for this application compares with prior art, can carry out the pertinence to the subchondral bone cyst and freshen the processing, and because the utility model discloses structural characteristic can carry out the pertinence cutting of bone face according to the bone defect condition and the customization surface part false body shape.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic view of a bone cutting mechanism according to the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is a schematic view of a portion of the structure of the connection between the support rod and the scale guide pin;

handpiece 1, memory 11;

the bone cutting part 2, the connecting pipe 21, the bone cutting knife 22, the connecting rod 23, the moving ring 24 and the screw 25;

the rotary fixing piece 3, the fixing ring 31, the support rod 32, the inserting part 33, the concave hole 34 and the support rib 35;

and 4, a scale guide needle 4.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

According to the drawings of fig. 1-3, the present invention provides a bone cutting mechanism, which is convenient, fast and effective to operate, comprising a hand piece 1, a bone cutting piece 2, and a rotary fixing piece 3, wherein the hand piece 1 is connected with the rotary fixing piece 3, and the bone cutting piece 2 is slidably connected with the rotary fixing piece 3 through a connecting rod 23;

the rotary fixing part 3 is movably connected with the scale guide pin 4, so that the rotary fixing part 3 moves up and down along the length direction of the scale guide pin 4 and rotates along the circumferential direction of the scale guide pin 4.

In this embodiment, the structure of the hand piece 1 is convenient for the operator to hold and does not affect the operation, for example, the cross section of the hand piece 1 may be trapezoidal, and the hand piece 1 is held to control the moving direction of the whole device. Further, the hand piece 1 is used for an operator to hold and provide mechanical power for the operator to adjust the height and direction of the guide pin 4 relative to the scale.

More specifically, the bone cutting member 2 has a working principle similar to that of an ultrasonic osteotome, has no effect on soft tissues in the working process, can perform ultrasonic cutting when meeting bones, and due to the characteristics of the bone cutting member, water flow or fine mist can be sprayed out in the cutting process, so that the cutting part can be washed while cooling a cut wound.

In a specific embodiment, in order to keep the structure of the present invention in the center of the bone defect (because the graduated pin 4 is vertically implanted into the bone defect) all the time during the operation process, the structure of the present invention is convenient for operation, the rotary fixing member 3 includes a fixing ring 31 and a support rod 32, one end of the hand piece 1 is connected with the fixing ring 31, so that the hand piece 1 moves along with the movement of the rotary fixing member 3; the one end of bracing piece 32 connect in gu fixed ring 31's inner wall, the other end is directional gu fixed ring 31's centre of a circle direction is through bracing piece 32 joint scale guide pin 4, makes bracing piece 32 removes along 4 length direction of scale guide pin to rotatory along the circumferencial direction of scale guide pin 4, at this in-process, because scale guide pin 4 is located bone defect department central authorities perpendicularly throughout, improve the cutting accuracy.

In order to improve the cutting degree, the graduated guide pin 4 is always positioned on the longitudinal central line of the fixed ring 31. Furthermore, the supporting rod 32 is inserted into the inner wall of the fixing ring 31, for example, as shown in the drawings of the present invention, one end of the supporting rod 32 connected to the fixing ring 31 is provided with two insertion portions 33 arranged oppositely, so as to be inserted into two corresponding insertion holes (not shown in the drawings) in the fixing ring 31. It should be noted that the supporting rod 32 and the fixing ring 31 may be fixedly connected or inserted, and are specifically arranged according to actual requirements.

In a specific embodiment, the supporting rod 32 is provided with a concave hole 34 for clamping the calibration guide pin 4, so that the fixing ring 31 drives the supporting rod 32 to move up and down along the length direction of the calibration guide pin 4 and rotate along the circumferential direction of the calibration guide pin 4 under the action of the hand piece 1. In this embodiment, the scale guide pin 4 is adapted to be clamped in the concave hole 34, so as to prevent the scale guide pin 4 from shaking in the concave hole 34 to affect the operation precision.

In a specific embodiment, in order to facilitate the targeted fresh treatment of the subchondral bone cyst and simultaneously perform targeted cutting on the bone surface according to the bone defect condition and the customized surface part prosthesis shape, the bone cutting element 2 comprises a connecting pipe 21, a bone cutting knife 22 and a connecting rod 23, one end of the connecting pipe 21 is connected with a power source, the other end of the connecting pipe is connected with the bone cutting knife 22, and two ends of the connecting rod 23 are respectively fixedly connected with the bone cutting knife 22 and the other end of the connecting rod is slidably connected with the fixing ring 31, so that the bone cutting knife 22 is slidably connected around the circumference direction of the fixing ring 31 through the connecting rod 23. In this embodiment, after the connection tube 21 is inserted into an instrument (which may be one of a osteotome power system and an osteotome main machine, and the structure is commercially available and therefore not described in detail), the bone cutting knife 22 may be operated to perform ultrasonic cutting, the bone cutting knife 22 in this embodiment is an ultrasonic cutting knife, and at least one power line is provided in the connection tube 21 for providing power to the at least one mist outlet tube for spraying during the bone cutting process to clean the cutting site.

Further, for convenient operation, to better perform cutting operation on the bone defect, the bone cutting element 2 further comprises a moving ring 24 sleeved on the fixing ring 31, so that after the connecting rod 23 is connected with the moving ring 24, the moving ring 24 slides along the circumferential direction of the fixing ring 31 to drive the bone cutting knife 22 to move along the circumferential direction of the fixing ring 31. Namely, the bone cutting knife 22 can move around the circumference direction of the fixing ring 31, and then the cutting operation of the circumferential direction of the bone defect position is completed.

In order to fix the bone cutting knife 22, the moving ring 24 is provided with screw holes for screws 25 to pass through, and the screws 25 are inserted and then abut against the fixing ring 31, so that the fixing ring 31 and the moving ring 24 are fixed.

For carrying and transportation, the hand piece 1 is provided with a storage 11 for storing the connecting tube 21, so that the insertion end of the connecting tube 21 is stored therein.

In the concrete implementation mode, for improving the accuracy, guarantee that rotatory mounting 3 normally moves on scale guide pin 4, reduce the utility model discloses the structure is to scale guide pin 4's pressure, rotatory mounting 3 still include both ends connect respectively the bracing piece 32 the support rib 35 of solid fixed ring 31 inner wall, and make scale guide pin 4 be located bracing piece 32 support rib 35 gu fixed ring 31 encloses the space that closes.

The utility model discloses a realize like this:

the scale guide pin 4 is clamped into the concave hole 34, then the insertion end of the connecting pipe 21 is inserted into a corresponding instrument to open the bone cutting knife 22, and meanwhile, the hand-held piece 1 can be moved along the length direction and the circumferential direction of the scale guide pin 4 by holding the hand-held piece 1 according to requirements so as to adjust the cutting position of the bone cutting knife 22 at the bone defect;

and connecting rod 23 with position, motion relation between shift ring 24 and the solid fixed ring 31 can realize bone cutting knife 22 edge gu fixed ring 31 circumferencial direction motion uses the utility model discloses the structure carries out the bone cutting, and the horizontal shape when using the bone to bore the cutting contrast in with the tradition, the utility model discloses in can carry out the pertinence cutting to the bone face according to the defective condition and the partial false body shape of customization surface.

Principles, structures, processes, etc., not explicitly described in the present application are available to those skilled in the art through conventional technical means.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. Bone cutting device, its characterized in that: the bone cutting device comprises a hand-held piece (1), a bone cutting piece (2) and a rotary fixing piece (3), wherein the hand-held piece (1) is connected with the rotary fixing piece (3), and the bone cutting piece (2) is connected with the rotary fixing piece (3) in a sliding manner through a connecting rod (23);

the rotary fixing piece (3) is movably connected with the scale guide pin (4), so that the rotary fixing piece (3) moves up and down along the length direction of the scale guide pin (4) and rotates along the circumferential direction of the scale guide pin (4).

2. The bone cutting device of claim 1, wherein: the rotary fixing piece (3) comprises a fixing ring (31) and a supporting rod (32), one end of the handheld piece (1) is connected with the fixing ring (31), and the handheld piece (1) moves along with the movement of the rotary fixing piece (3); the one end of bracing piece (32) connect in the inner wall of solid fixed ring (31), the other end is directional gu the centre of a circle direction of fixed ring (31) is through bracing piece (32) joint scale guide pin (4), makes bracing piece (32) remove along scale guide pin (4) length direction to it is rotatory along the circumferencial direction of scale guide pin (4).

3. The bone cutting device of claim 2, wherein: be equipped with shrinkage pool (34) that are used for the card to establish scale guide pin (4) on bracing piece (32), make fixed ring (31) are in drive under the effect of handheld piece (1) bracing piece (32) move up and down along the length direction of scale guide pin (4) to the circumferencial direction of following scale guide pin (4) is rotatory.

4. The bone cutting device of claim 2, wherein: the bone cutting piece (2) comprises a connecting pipe (21), a bone cutting knife (22) and a connecting rod (23), one end of the connecting pipe (21) is connected with a power source, the other end of the connecting pipe is connected with the bone cutting knife (22), the two ends of the connecting rod (23) are respectively connected with the bone cutting knife (22) in a fixed mode, the other end of the connecting rod is connected with the fixing ring (31) in a sliding mode, and the bone cutting knife (22) is made to pass through the connecting rod (23) and wound around the fixing ring (31) in a sliding mode in the circumferential direction.

5. The bone cutting device of claim 4, wherein: the bone cutting piece (2) further comprises a moving ring (24) sleeved on the fixing ring (31), so that after the connecting rod (23) is connected with the moving ring (24), the moving ring (24) slides along the circumferential direction of the fixing ring (31) to drive the bone cutting knife (22) to move along the circumferential direction of the fixing ring (31).

6. The bone cutting device of claim 5, wherein: the moving ring (24) is provided with a screw hole for a screw (25) to pass through, and the screw (25) is inserted and then abutted to the fixing ring (31) so as to fix the fixing ring (31) and the moving ring (24).