JP2008229016A - Bone structure separation tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bone structure separation tool for separating human body bone structures in surgery which has a sufficiently long, simple and slim insertion-opening/closing part that can easily reach bone structures and allows limit to the insertion of a bone contact part. <P>SOLUTION: The bone structure separation tool 1a includes an insertion-opening/closing part 2a inserted into a human body bone structure and open or close it, and an opening/closing power transmission part 3a to transmit necessary power to open or close the insertion-opening/closing part 2a. An insertion depth limit display 22a showing the insertion depth limit of the insertion-opening/closing part 2a inserted into the bone structure is provided at the bone contact part 21a of insertion-opening/closing part 2a that contact the bone structure. By this insertion depth limit display 22a, the tool operator can easily see or forecast the distance before the insertion-opening/closing part 2a can reach the bone structure, expand, separate or cut bones there safely in jaw correction surgery. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bone structure separating instrument for separating a human bone structure in a surgical operation.

  Conventionally, a bone structure separating device for separating adjacent bone structures has been used in order to perform treatment by correcting or rearranging the bone structures in a surgical operation.

  For example, there is a bone structure separating device as shown in FIGS. That is, as a spreader device 20 for separating adjacent bone structures, an actuator assembly 21, a distal spreader assembly 90, and a selective adjustment mechanism 45 are provided. The actuator assembly 21 has a first handle 22 that is pivotally coupled to a second handle 24 about a fastener 26. The first spring member 42 extends along the first handle 22 and is coupled to the first handle by a pin 42a. A second spring member 44 extends along the second handle 24 and is coupled to the second handle by a pin 44a.

  The end spreader assembly 90 includes a first spreader member 50 and a second spreader member 70. The first expansion member 50 has a proximal end portion 52 that can be attached to the actuator assembly 21. The elongated member 54 extends from the proximal end portion 52 in the distal direction. The second expansion member 70 has a proximal end portion 72 that can be attached to the actuator assembly 21. The elongated member 74 extends from the proximal end portion 72 in the distal direction.

  The extension member 54 and the extension member 74 are provided with contact surfaces 54c and 74c, respectively, which come into contact with the bone structure, and the contact surfaces 54c and 74c are lateral to the convex curved portion of each bone contact surface. It has a surface feature that engages the bone structure, such as a groove that forms a ridge extending in the direction. It is considered to provide a dent, an uneven surface, a knurled surface, a tooth, a ridge, a bowl-shaped portion, a spike, a top and valley-shaped portion, a groove, a concave curved portion and a convex curved portion as the surface texture portion.

  The spreader member 50 has a concave curved end wall 60 extending from the proximal end portion 52 to the elongated member 54 and the spreader member 70 is a concavely curved end wall extending from the proximal end portion 72 to the elongated member 74. 80. The end walls 60, 80 abut against the bone structure adjacent to the space into which the extension members 54, 74 are inserted to limit the insertion depth of the extension members 54, 74 into the space. Can do.

The above-described spreader device 20 configured as described above may push and spread the bone structure by inserting the spreader member 50 and the spreader member 70 into the space between the adjacent bone structures. It can be done.
JP-T-2005-525906 (FIGS. 2, 6, and 10 described on pages 28 to 30)

  By the way, the conventional bone structure separating device as described above has an end portion for limiting the insertion depth of the insertion opening / closing portion provided with the bone contact portion which is the elongated member at the distal end into the space in the bone structure. A wall is provided so that the bone contact part at the tip does not protrude further, preventing accidents that cause damage to nerve vessels, blood vessels, muscle tissue, etc. due to excessive insertion of the bone contact part during treatment, for example can do.

  However, depending on the bone structure to be treated, insertion of the bone contact portion at the distal end of the bone structure separating device may be easily blocked by the human tissue until the bone structure reaches the bone structure, or the reaching depth may be large. In some cases, with a bone structure separating device as described above, there is an end wall provided to limit the insertion of the bone contact portion, so that it can be prevented from reaching the bone structure to be treated, Or there was a problem of causing damage to surrounding human tissues.

  For example, in the field of oral surgery, when performing the sagittal split operation after osteotomy of the mandibular mandibular branch in orthognathic surgery, the bone contact part at the tip of the bone structure separating device is attached to the inner bone structure. In order for the provided insertion opening / closing part to reach, the shape of the tip part provided with the bone contact part must be as simple and slim as possible, but in this respect it is possible to limit the insertion of the conventional bone contact part There was a limit to the bone structure separating device.

  Therefore, the present invention has been made to solve the above problems, and has a length that can easily reach the bone structure, a simple and slim insertion opening / closing portion, and the bone contact portion. An object of the present invention is to provide a bone structure separating device that can be inserted.

  That is, the bone structure separating instrument of the present invention is a bone comprising an insertion opening / closing portion that is inserted between bone structures of a human body and opens / closes between them, and an opening / closing power transmission portion that transmits power for opening / closing in the insertion opening / closing portion. An insertion depth limit indicating a depth limit of insertion between bone structures of an insertion opening / closing portion at a bone contact portion of the insertion opening / closing portion contacting the bone structure. It is assumed that a display unit is provided.

  In the bone structure separating instrument according to the present invention, the insertion depth limit display unit is set between a position of 10 mm from the distal end of the insertion opening / closing part and a position of 12 mm from the distal end of the insertion opening / closing part. Yes.

    Further, in the bone structure separating instrument of the present invention, the insertion depth restriction display portion is marked on the bone contact portion at a position of 10 mm and a position of 12 mm from the distal end of the insertion opening / closing portion. .

  Furthermore, in the bone structure separating instrument of the present invention, engagement grooves are provided at regular intervals in the bone contact part of the insertion opening / closing part other than the insertion depth restriction display part.

  Furthermore, the bone structure separating instrument of the present invention is provided with an opening / closing adjusting mechanism for engaging and holding the opening width of the insertion opening / closing portion in an appropriate width state in the bone structure separating instrument.

  Therefore, the bone structure separating instrument of the present invention is provided with the insertion opening / closing part and has an insertion depth limit indicating the insertion depth limit between the bone structures of the insertion opening / closing part at the bone contact part contacting the bone structure. Since the display unit is provided, the shape of the insertion opening / closing unit can be configured as simple and slim as possible as a bone structure separating instrument that can limit insertion of the bone contact unit.

  Further, in the bone structure separating instrument of the present invention, the insertion opening / closing part has a length and a simple and slim shape that can easily reach the bone structure as described above, and the insertion depth is inserted into the bone contact part of the insertion opening / closing part. Because it has a restriction display, even if the insertion opening / closing part is easily blocked by human tissue or the depth of reach is large until the insertion opening / closing part reaches the bone structure, the insertion depth restriction display It is possible to easily predict the arrival of the insertion opening / closing part to the bone structure by the part, and it is possible to avoid accidents such as damage to the surrounding human body tissue as much as possible and to have excellent safety.

  Furthermore, since the bone structure separating instrument of the present invention is configured such that the insertion depth limit display unit is engraved on the bone contact portion, the insertion depth limit display unit can be easily provided in production. In the case where a large number of small engagement grooves for engaging the bone are engraved in the bone contact portion, the insertion depth limit display portion can be provided in the same manner as the engraving of the engagement groove. The structure in the bone contact part provided with both the display part and the engagement groove becomes compact.

  Furthermore, the bone structure separating instrument of the present invention is configured such that the insertion depth restriction display section is set between a position of 10 mm from the distal end of the insertion opening / closing section and a position of 12 mm from the distal end. It is suitable for expansion and separation of bone structures in orthopedic surgery, or osteotomy, and this insertion depth limit display section is marked in line, so that orthognathic surgery is performed while easily confirming the limit position visually. The bone structure can be expanded and separated, or osteotomy can be performed.

  Furthermore, since the bone structure separating instrument of the present invention is provided with an opening / closing adjustment mechanism for adjusting the opening / closing of the insertion opening / closing part, the opening width of the insertion opening / closing part in orthognathic surgery is appropriately fixed, or Since the opening / closing operation of the insertion opening / closing part can be performed gradually and stably, appropriate and reliable treatment can be performed.

Hereinafter, the bone structure separating instrument of the present invention will be described in detail based on an embodiment shown in the drawings.
1 and 2 are perspective views showing an embodiment of the bone structure separating instrument of the present invention, FIG. 3 is a front view showing an embodiment of the bone structure separating instrument of the present invention, and FIG. FIG. 5 is a front reference view showing one embodiment of the opening / closing operation of the insertion opening / closing part and the opening / closing power transmission part in the bone structure separating instrument of the present invention, and FIG. 5 shows the insertion opening / closing part 2a in the bone structure separating instrument of the present invention as a bone. FIG. 6 is a reference diagram showing an embodiment in a state of being inserted between structures, and FIG. 6 is a reference diagram showing an embodiment of orthognathic surgery using the bone structure separating instrument of the present invention. 7 to 9 are reference diagrams showing the prior art.

  That is, as shown in the embodiment of FIGS. 1 and 3, the bone structure separating instrument 1a of the present invention is inserted between the bone structures of the human body and opened / closed between them, and the insertion opening / closing portion 2a. This is mainly composed of an opening / closing power transmission part 3a for transmitting power for opening and closing in the part 2a.

  With respect to the insertion opening / closing part 2a and the opening / closing power transmission part 3a, as shown in FIG. 3, a right frame 11a and a left frame 12a, and a turning part 14a for connecting the right frame 11a and the left frame 12a so as to be rotatable in the middle. In the frame body constructed from the above, the upper side of the rotating part 14a is the insertion opening / closing part 2a, and the lower side of the rotating part 14a is the opening / closing power transmission part 3a.

  Therefore, as shown in FIG. 4, when the opening / closing power transmission unit 3a is opened and closed by applying a force, the insertion opening / closing unit 2a also performs an opening / closing operation with the rotating unit 14a as a base axis. Note that the input to the opening / closing power transmission unit 3a is not shown in the figure, regardless of whether it is manual or automatic, and an input configuration using a link mechanism is also conceivable. In addition, in the drawings, as an embodiment, a configuration in which the opening / closing power transmission unit 3a is manually opened and closed while gripping is shown, and slippery when gripping the outer side of the right frame 11a and the left frame 12a is shown. Asperities are appropriately formed.

  Further, as shown in FIG. 1, the insertion opening / closing part 2a may be formed by tilting a part of the distal end side to one side as appropriate. By forming the insertion opening / closing portion 2a in this manner, an angle at which the insertion opening / closing portion 2a can be easily inserted between bone structures can be obtained.

  Furthermore, as shown in FIG.1 and FIG.3, you may provide the biasing member 15a suitably in the said opening-and-closing motive power transmission part 3a. That is, the leaf spring-like urging members 15a and 15a attached to the rear ends of the right frame 11a and the left frame 12a can be connected to each other at their tips. Therefore, the opening / closing power transmission unit 3a always maintains the state of being urged in the opening direction by the urging members 15a and 15a.

  In particular, when the opening / closing power transmission unit 3a is opened and closed manually, that is, while being held with one hand, the closing power transmission unit 3a is always easier to close than the opening / closing power transmission unit 3a. It is easy to use if it is urged by the urging member 15a in the opening direction.

  The urging member 15a is not limited to a plate spring shape, and may be a coil spring or a fluid pressure.

  Furthermore, in the bone structure separating instrument 1a of the present invention, an opening / closing adjustment mechanism 4a for adjusting opening / closing of the insertion opening / closing portion 2a may be provided as shown in FIGS.

  That is, as the opening / closing adjustment mechanism 4a, the end of the bottom frame 13a is connected to the end of the left frame 12a opposite to the insertion opening / closing portion 2a, and the right frame 11a of the bottom frame 13a is connected. On one side, which is the side, there is provided an engaging groove portion 131a composed of a number of small grooves formed in the length direction.

  Further, an engagement end 111a is provided at the end of the right frame 11a on the bottom frame 13a side, and the engagement end 111a is always in pressure contact with the engagement groove 131a of the bottom frame 13a.

  Therefore, as shown in FIG. 4, when the opening / closing power transmission portion 3a is opened and closed, the engagement end portion 111a of the right frame 11a is formed in each groove formed on the engagement groove portion 131a of the bottom frame 13a. It is possible to move while engaging in a stepwise manner, and as shown in FIG. 2, the insertion opening / closing portion 2a can be engaged and fixed with an appropriate opening width.

  Although not shown, the engagement end portion 111a of the right frame 11a is always in pressure contact with the engagement groove portion 131a of the bottom frame 13a, although not shown, using biasing by a spring or bending of the bottom frame 13a itself. Also good.

  The opening / closing adjustment mechanism 4a is also referred to as a ratchet mechanism. In addition to such a mechanism, an existing expansion / contraction adjustment mechanism is appropriately provided between the right frame 11a and the left frame 12a, although not shown. Can do.

  As shown in FIGS. 1 and 5, the bone structure separating instrument 1a of the present invention is provided on the insertion opening / closing part 2a and on the bone contact part 21a contacting the bone structure B, the bone of the insertion opening / closing part 2a. An insertion depth restriction display unit 22a that indicates the insertion depth restriction between the structures B is provided. That is, it is possible to determine whether or not the insertion opening / closing part 2a is inserted between the bone structures B at an appropriate depth while visually recognizing the insertion depth restriction display part 22a.

  The insertion depth restriction display portion 22a is provided between the insertion depth L1 position from the distal end of the insertion opening / closing section 2a and the insertion depth L2 position from the distal end as shown in FIG.

  Further, the insertion depth restriction display unit 22a can display a line on the bone contact unit 21a. Further, the display means is not limited to this, and the ridges may be formed opposite to the engraved lines, and the use of paint or other parts may be considered as another display means.

  Furthermore, as shown in FIGS. 1 and 5, a large number of small engaging grooves 23a for engaging with bone may be provided in the bone contact portion 21a at regular intervals. The engagement groove 23a can be formed in the bone contact portion 21a. In that case, as shown in the drawing, the insertion depth restriction display portion 22a is provided in the same manner as the engraving of the engaging groove 23a.

  Further, as shown in FIG. 5, the bone structure separating instrument 1a of the present invention places the insertion depth limit display portion 22a at a position 10 millimeters from the distal end of the insertion opening / closing portion 2a and a position 12 millimeters from the distal end. It is assumed that it was provided. The position of the insertion depth restriction display portion 22a in the insertion opening / closing portion 2a is particularly suitable for expansion and separation of the bone structure or osteotomy in the orthognathic surgery shown in FIG.

It is a perspective view which shows one Embodiment of the bone structure separation instrument of this invention. It is a perspective view which shows one Embodiment of the bone structure separation instrument of this invention. It is a front view which shows one Embodiment of the bone structure separation instrument of this invention. It is a front reference figure which shows one Embodiment of the opening / closing operation | movement of the insertion opening / closing part and the opening / closing power transmission part in the bone structure separation instrument of this invention. It is a reference figure showing one embodiment of a state where insertion opening part 2a in a bone structure separation instrument of the present invention was inserted between bone structures. It is a reference figure showing one embodiment of orthognathic surgery using the bone structure separation instrument of the present invention. It is a reference figure which shows a prior art. It is a reference figure which shows a prior art. It is a reference figure which shows a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Bone structure isolation | separation instrument 11a Right frame 111a Engagement end part 12a Left frame 13a Bottom frame 131a Engagement groove part 14a Rotating part 15a Energizing member 2a Insertion opening / closing part 21a Bone contact part 22a Insertion depth restriction display part 23a Engagement groove 3a Open / close power transmission unit 4a Open / close adjustment mechanism
B Bone structure L1 Insertion depth L2 Insertion depth

Claims (5)

A bone structure separating instrument comprising an insertion opening / closing part that is inserted between bone structures of a human body and opens / closes between them, and an opening / closing power transmission part that transmits power for opening / closing in the insertion opening / closing part. In the separation instrument, the bone contact portion of the insertion opening / closing portion that comes into contact with the bone structure is provided with an insertion depth restriction display portion indicating a depth restriction of insertion between the bone structures of the insertion opening / closing portion. Structure separator. 2. The bone structure according to claim 1, wherein the insertion depth limit display unit is set between a position of 10 millimeters from a distal end of the insertion opening / closing section and a position of 12 millimeters from the distal end of the insertion opening / closing section. Body separation instrument. 3. The insertion depth restriction display section is marked on a bone contact portion at a position of 10 millimeters and a position of 12 millimeters from the distal end of the insertion opening / closing section, respectively. Bone structure separation instrument. 4. The bone structure separation according to claim 1, wherein engagement grooves are provided at regular intervals in a bone contact portion of an insertion opening / closing portion other than the insertion depth restriction display portion. Instruments. The bone structure separating instrument according to claim 1, 2, 3, or 4, further comprising an opening / closing adjustment mechanism for holding an open width state of the insertion opening / closing portion. The bone structure separating instrument according to any one of claims 2, 3 and 4.

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