JP2013244130A - Skull plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skull plate which is excellent in workability and allows position confirmation and follow-up after surgery.SOLUTION: A skull plate 1A includes a plate-shaped synthetic resin body part, and a wire-shaped or pin-shaped position confirming member attached to the body part. The position confirming member has an imaging ability by at least one method of X-ray imaging or nuclear magnetic resonance imaging. The synthetic resin constituting the body part is of a kind selected from ultrahigh molecular weight polyethylene resin, polymethylmethacrylate resin and polyether ether ketone resin.

Description

  The present invention relates to a plate used for repairing a skull defect.

  Conventionally, a skull defect has been repaired with a skull plate (hereinafter also referred to as a “plate”). As such a plate, the thing made from ceramics is known (for example, refer nonpatent literature 1). Ceramics has contrast properties by X-rays and nuclear magnetic resonance imaging (hereinafter sometimes referred to as “MRI”). Therefore, according to the ceramic plate, post-operative plate position confirmation and follow-up can be performed by X-ray imaging and MRI examination.

On the other hand, the plate needs to be processed according to the shape of the skull defect.
However, the shape of the skull defect portion is often complicated, and it is difficult to process the ceramic material into such a shape.

Here, if a synthetic resin is used as the material of the plate, it is considered that the problem due to ceramics may be solved because the processability is superior to ceramics.
However, the synthetic resin has no contrast by X-ray and MRI, and therefore there is a problem that the position of the plate after surgery and follow-up cannot be observed.

“Ceramics products”, [online], PENTAX, [searched on May 14, 2012], Internet <URL: http://www.bone.pentax.jp/>

  The subject of this invention is providing the plate for skulls which is excellent in workability and which can perform position confirmation and follow-up after operation.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found a solution means having the following constitution and have completed the present invention.
(1) It has a plate shape, is attached to the main body portion made of synthetic resin, is wire-shaped or pin-shaped, and has a contrast property by at least one of X-ray and nuclear magnetic resonance imaging. A skull plate comprising: a position confirmation member.
(2) The skull plate according to (1), wherein the synthetic resin is one selected from an ultrahigh molecular weight polyethylene resin, a polymethyl methacrylate resin, and a polyether ether ketone resin.
(3) The skull plate according to (1) or (2), wherein the position confirmation member has a wire shape and is made of metal.
(4) The position confirmation member is in the shape of a wire, and the main body has a groove located on at least one of the surface and the outer peripheral surface, and the wire-like position confirmation member is in the groove. The skull plate according to any one of (1) to (3), wherein the skull plate is attached to the main body in a state of being housed inside.
(5) The groove is connected to the outer groove whose one end is located on the surface or the outer peripheral surface and to the other end of the outer groove located on the inner side of the outer groove. And an inner groove that is substantially circular in a cross-sectional view perpendicular to the longitudinal direction of the groove, and the diameter of the wire-shaped position confirmation member is d1, and the groove width of the outer groove is The skull plate according to (4), wherein d, W, and D1 have a relationship of W <d1 ≦ D1, where W and the diameter of the inward groove are D1.
(6) The skull plate according to (4) or (5), wherein the main body has a plurality of grooves.
(7) The skull plate according to (6), wherein at least two of the plurality of grooves intersect each other.
(8) The position confirmation member is in the form of a wire, and the main body has a hole having at least one opening opened on the surface or outer peripheral surface thereof, and the position in the form of a wire is confirmed. The skull plate according to any one of (1) to (7), wherein a member is attached to the main body in a state of being inserted into the hole from the at least one opening.
(9) The skull plate according to (8), wherein d1 and D2 have a relationship of d1 ≧ D2, where d1 is a diameter of the wire-shaped position confirmation member and D2 is a diameter of the hole. .
(10) The skull plate according to (1) or (2), wherein the position confirmation member has the pin shape and is made of metal or ceramics.
(11) The position check member has a pin shape having a pin head and a substantially columnar pin insertion portion connected to the pin head, and the body portion penetrates from the front surface to the back surface. (1), (2) or (10), wherein the pin-shaped position confirmation member is attached to the main body in a state where the pin insertion portion is inserted into the through-hole. A skull plate according to claim 1.
(12) The skull plate according to (11), wherein d2 and D3 have a relationship of d2 ≧ D3, where d2 is a diameter of the pin insertion portion and D3 is a diameter of the through hole.
(13) The pin insertion portion includes a first region located on a distal end side, and a second region connected to the first region and located on the pin head side, The diameter of the first region increases toward the second region. When the maximum diameter is d3 and the diameter of the through hole is D3, the diameters of the first region are d3 and D3. Has a relationship of d3> D3, and when the length of the second region is h and the length of the through hole is H, the h and H have a relationship of h ≧ H, The skull plate as described in 11).
(14) The skull plate according to any one of (11) to (13), wherein the pin insertion portion includes a slit extending from a tip portion toward the pin head.
(15) The skull plate according to any one of (11) to (14), wherein the main body includes a plurality of the through holes.
(16) The skull plate according to (15), including a plurality of the pin-like position confirmation members and connecting the plurality of pin-like position confirmation members to each other.
(17) The pin insertion portion has a convex portion or a concave portion, and the through hole is located on an inner wall surface of the pin insertion portion, and the concave portion or the convex portion can be fitted into the convex portion or the concave portion of the pin insertion portion. The skull plate according to any one of (11) to (16), which has a portion.
(18) The skull plate according to any one of (11) to (16), wherein the pin insertion portion has a screw shape.
(19) The skull plate according to (18), wherein the screw-like pin insertion portion has a notch portion positioned at a distal end portion.
(20) The skull plate according to any one of (10) to (19), wherein the pin-shaped position confirmation member is hollow.

  According to the present invention, since the main body is made of synthetic resin, it is excellent in workability, and therefore can cope with the complicated shape of the skull defect, and can be custom-made for each shape of the skull defect. effective. Synthetic resins are usually lightweight and flexible. Therefore, by constituting the main body portion with a synthetic resin, it is possible to cope with weight reduction and reduce the crushing risk. In addition, since a position confirmation member having a contrast property by X-ray or MRI is attached to the main body, it is possible to confirm the position and follow-up of the post-operative plate by X-ray imaging or MRI examination.

It is a schematic explanatory drawing which shows the use condition of the plate for skulls which concerns on 1st Embodiment of this invention. It is a disassembled perspective view which shows the plate for skulls of FIG. (A) is a top view which shows the main-body part of the plate for skulls of FIG. 1, (b) is the side view. 3A is a cross-sectional view taken along line ii in FIG. 3A and a cross-sectional view perpendicular to the longitudinal direction of the wire-like position confirmation member, and FIG. 3B is a cross-sectional view taken along line ii-ii in FIG. It is sectional drawing perpendicular | vertical to the longitudinal direction of sectional drawing and a wire-shaped position confirmation member. (A) is a perspective view which shows the main-body part of the plate for skulls concerning 2nd Embodiment of this invention, (b) is the top view. (A) is a perspective view which shows the main-body part of the plate for skulls which concerns on 3rd Embodiment of this invention, (b) is the top view. It is a disassembled perspective view which shows the plate for skulls which concerns on 4th Embodiment of this invention. (A) is a top view which shows the main-body part of the plate for skulls of FIG. 7, (b) is the iv arrow side view of (a), (c) is the v arrow side view of (a). It is. (A) And (b) is a schematic explanatory drawing which shows the pin-shaped position confirmation member and through-hole in the plate for skulls of FIG. (A) And (b) is a schematic explanatory drawing which shows the plate for skulls which concerns on 5th Embodiment of this invention. (A) is a schematic explanatory drawing which shows the plate for skulls concerning 6th Embodiment of this invention, (b) is a perspective view which shows the pin-shaped position confirmation member. (A) is a perspective view which shows the pin-shaped position confirmation member in the plate for skulls concerning 7th Embodiment of this invention, (b) is a schematic explanatory drawing which shows the modification. (A) And (b) is a schematic explanatory drawing which shows the plate for skulls which concerns on 8th Embodiment of this invention. (A) is a schematic explanatory drawing which shows the plate for skulls concerning 9th Embodiment of this invention, (b) is a schematic explanatory drawing which shows the modification. It is a schematic cross-section explanatory drawing which shows the plate for skulls which concerns on 10th Embodiment of this invention.

<First Embodiment>
Hereinafter, the skull plate according to the first embodiment of the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1, the plate 1 </ b> A of the present embodiment repairs the defect 101 by closing the defect 101 of the skull 100. As shown in FIG. 2, the plate 1 </ b> A of the present embodiment includes a main body 2 </ b> A and a position confirmation member 3.

  As shown in FIGS. 1 to 3, the main body 2 </ b> A corresponds to the shape of the defect 101, and when the defect 101 is closed, the front surface 21 located on the scalp side and the back surface 22 located on the brain side. And an outer peripheral surface 23 located between the front surface 21 and the back surface 22. Examples of a method of processing the main body 2A into such a plate shape include cutting.

  In addition, each of the intersection part of the surface 21 and the outer peripheral surface 23, and the intersection part of the back surface 22 and the outer peripheral surface 23 can be chamfered as needed. About the thickness etc. of 2 A of main-body parts, a desired value can be employ | adopted according to the defect | deletion part 101, and it is not specifically limited.

  The main body 2A is made of synthetic resin. Thereby, it is excellent in workability, can respond to weight reduction, and can reduce a crushing risk. The synthetic resin is preferably one selected from an ultrahigh molecular weight polyethylene resin, a polymethyl methacrylate resin, and a polyether ether ketone resin, and among the exemplified synthetic resins, an ultrahigh molecular weight polyethylene resin is preferable.

  The ultrahigh molecular weight polyethylene resin is a polyethylene resin having a weight average molecular weight of 1,000,000 or more, and can be produced, for example, by increasing the reaction time while reacting the ethylene monomer by a low-pressure suspension polymerization method. The weight average molecular weight of the ultrahigh molecular weight polyethylene resin is usually about 1 million to 7 million.

  On the other hand, the position confirmation member 3 is attached to the main body 2A described above, and has contrast properties by at least one of X-rays and MRI. Thereby, the position confirmation and follow-up of the postoperative plate 1A can be performed by X-ray imaging or MRI examination.

  If it demonstrates concretely, the position confirmation member 3 of this embodiment is wire shape, as shown in FIG. That is, the position confirmation member 3 of this embodiment is a wire 31. The wire 31 is attached to the main body 2A as follows.

  The plate 1 </ b> A of this embodiment includes a plurality of wires 31. Further, the main body 2 </ b> A of the present embodiment has a plurality of grooves 24. As shown in FIG. 3, the plurality of grooves 24 are located on the surface 21 and the outer peripheral surface 23 of the main body 2 </ b> A. The plurality of wires 31 are attached to the main body 2 </ b> A while being accommodated in the grooves 24.

  Here, the groove part 24 of this embodiment has the outward groove | channel 241 and the inward groove | channel 242 as shown in FIG. One end 241 a of the outer groove 241 is located on the surface 21 or the outer peripheral surface 23. The inner groove 242 is located on the inner side of the outer groove 241 and is connected to the other end 241 b of the outer groove 241. Further, the inner groove 242 has a substantially circular shape in a cross-sectional view perpendicular to the longitudinal direction of the groove portion 24. Similarly, the wire 31 has a substantially circular shape in a cross-sectional view perpendicular to the longitudinal direction.

  When the diameter of the wire 31 is d1, the groove width of the outer groove 241 is W, and the diameter of the inner groove 242 is D1, it is preferable that d1, W, and D1 have a relationship of W <d1 ≦ D1. . In the present embodiment, d1, W, and D1 have a relationship of W <d1 = D1. According to such a configuration, the following effects can be achieved.

  That is, since the main body 2A is made of synthetic resin as described above, even if the relationship of W <d1, the wire 31 can be moved in the direction of arrow iii and pushed into the inner groove 242 with a light force, Therefore, it is possible to attach the wire 31 to the main body 2A relatively easily in the operating field, during surgery, and the like. Moreover, since it has the relationship of d1 <= D1, the wire 31 can be accommodated in the inward groove | channel 242 with moderate holding force, and it can suppress that the wire 31 falls off from the main-body part 2A.

  The length of the wire 31 is preferably the same as the length of the groove 24 or slightly shorter than the length of the groove 24. Thereby, the accommodation property of the wire 31 in the groove part 24 can be improved.

  The wire 31 is preferably made of metal. Thereby, the wire 31 comes to have contrast properties by at least one of X-rays and MRI. Examples of the metal include titanium, a titanium alloy, a cobalt-chromium alloy, and stainless steel (SUS). These exemplified metals have contrast properties by X-ray and MRI.

  In addition, in this embodiment, although the number of the wires 31 is plural, the number of the wires 31 may be one as long as the position confirmation and follow-up observation of the postoperative plate 1A are possible. Further, the number of wires 31 may be the same as or different from the number of grooves 24. In other words, as long as the position confirmation and follow-up of the postoperative plate 1A can be performed, the wires 31 may be accommodated in all of the plurality of grooves 24, or the wires 31 may be provided only in the desired grooves 24 among the plurality of grooves 24. It may be accommodated.

  The configuration of each of the plurality of wires 31 may be the same as or different from each other. Similarly, the configuration of each of the plurality of groove portions 24 may be the same as or different from each other. In this embodiment, as shown to Fig.3 (a), the some groove part 24 in the surface 21 is comprised by mutually different length, and is located in the substantially equal space | interval. Further, as shown in FIG. 3B, the groove portion 24 in the outer peripheral surface 23 is located at a part of the outer peripheral surface 23. The groove 24 in the outer peripheral surface 23 may be located over the entire periphery of the outer peripheral surface 23. The groove part 24 should just be located in at least one among the surface 21 and the outer peripheral surface 23. FIG.

Second Embodiment
Next, the plate which concerns on 2nd Embodiment of this invention is demonstrated in detail with reference to FIG. In FIG. 5, the same components as those in FIGS. 1 to 4 described above are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 5, the main body 2 </ b> B included in the plate 1 </ b> B of the present embodiment has a plurality of grooves 24. The plurality of grooves 24 are located on the surface 21 of the main body 2B. In the present embodiment, at least two groove portions 24B among the plurality of groove portions 24 intersect each other. According to such a structure, the attachment freedom degree of the wire 31 mentioned above with respect to the main-body part 2B can be improved.
Since other configurations are the same as those of the plate 1A according to the first embodiment described above, the description thereof is omitted.

<Third Embodiment>
Next, a plate according to a third embodiment of the present invention will be described in detail with reference to FIG. In FIG. 6, the same components as those in FIGS. 1 to 5 described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 6, the main body 2 </ b> C included in the plate 1 </ b> C of the present embodiment has a plurality of holes 25. Each of the plurality of hole portions 25 has a pair of opening portions 25a and 25a opened on the surface 21 of the main body portion 2C. In the present embodiment, the wire 31 described above is attached to the main body 2C in a state where the wire 31 is inserted into the hole 25 from one of the pair of openings 25a and 25a. According to such a structure, it can suppress that the wire 31 falls out of the main-body part 2C.

  In particular, when the diameter of the hole 25 is D2, it is preferable that D2 and the diameter d1 of the wire 31 described above have a relationship of d1 ≧ D2. According to such a configuration, the holding force for holding the wire 31 in the hole 25 can be improved.

  In the present embodiment, the number of the hole portions 25 is plural, but the number of the hole portions 25 may be one as long as the position confirmation and follow-up of the post-operative plate 1C are possible. The configuration of each of the plurality of hole portions 25 may be the same as or different from each other.

Moreover, in this embodiment, although the opening part 25a is opened in a pair on the surface 21 of the main body part 2C, the opening part 25a may be opened on the outer peripheral surface 23 of the main body part 2C, or at least one. I just need it.
Other configurations are the same as those of the plates 1A and 1B according to the first and second embodiments described above, and thus the description thereof is omitted.

<Fourth embodiment>
Next, the plate which concerns on 4th Embodiment of this invention is demonstrated in detail with reference to FIGS. 7 to 9, the same components as those in FIGS. 1 to 6 described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 7, the position confirmation member 3 provided in the plate 1 </ b> D of the present embodiment has a pin shape. That is, the position confirmation member 3 of this embodiment is a pin 32. As shown in FIG. 9, the pin 32 includes a pin head 321 and a substantially columnar pin insertion portion 322 connected to the pin head 321. In the present embodiment, the pin head 321 has a substantially flat plate shape, and the pin insertion portion 322 has a substantially cylindrical shape. Moreover, in this embodiment, the diameter of the pin head 321 is larger than any of the diameter of the pin insertion part 322 and the through-hole 26 demonstrated below. The pin 32 having such a configuration is attached to the main body 2D as follows.

  The plate 1D of the present embodiment includes a plurality of pins 32 as shown in FIG. Further, the main body 2 </ b> D of the present embodiment has a plurality of through holes 26. As shown in FIGS. 8 and 9, each of the plurality of through holes 26 penetrates from the front surface 21 to the back surface 22 of the main body 2 </ b> D. Each of the plurality of through holes 26 has a substantially circular shape when viewed from the surface 21 side, as shown in FIG. The pin 32 is attached to the main body 2 </ b> D with the pin insertion part 322 inserted into the through hole 26.

  Specifically, as shown in FIG. 9A, first, the pin 32 is moved in the direction of arrow vi. Then, as shown in FIG. 9B, the pin 32 is inserted into the body portion 2D by inserting the pin insertion portion 322 into the through hole 26 until the pin head portion 321 contacts the surface 21 of the body portion 2D. It is attached.

  Here, when the diameter of the pin insertion part 322 is d2 and the diameter of the through hole 26 is D3, it is preferable that d2 and D3 have a relationship of d2 ≧ D3. In the present embodiment, d2 and D3 have a relationship of d2 = D3. According to such a configuration, the pin insertion portion 322 can be held in the through hole 26 with an appropriate holding force, and the pin 32 can be prevented from coming off.

  Further, in order to prevent the pin 32 from coming off, the length of the pin insertion portion 322 is preferably the same as the length of the through hole 26 or slightly longer than the length of the through hole 26. In the present embodiment, as shown in FIG. 9B, the length of the pin insertion portion 322 is slightly larger than the length of the through hole 26.

  The pin 32 is preferably made of metal or ceramics. Thereby, the pin 32 comes to have contrast properties by at least one of X-ray and MRI. In particular, when the pin 32 is made of metal, workability when the pin 32 is processed can be improved. Further, when the pin 32 is made of ceramics, it can cope with metal allergy. Examples of the metal include the same metals as exemplified for the wire 31. Examples of ceramics include alumina and zirconia. These exemplified ceramics have contrast properties by X-ray and MRI.

  In the present embodiment, there are a plurality of pins 32 and through-holes 26, but the number of pins 32 and through-holes 26 is set as long as the position and follow-up of the post-operative plate 1D can be confirmed. It can also be one. Further, the number of pins 32 may be the same as or different from the number of through holes 26. In other words, the pins 32 may be inserted into all of the plurality of through holes 26 as long as the position confirmation and follow-up of the post-operative plate 1D can be performed, or only the desired through hole 26 among the plurality of through holes 26. A pin 32 may be inserted. According to this embodiment, the pin 32 can be easily inserted into the through-hole 26 located at a location intended by the operator during the operation.

  The configuration of each of the plurality of pins 32 may be the same as or different from each other. Similarly, the configuration of each of the plurality of through holes 26 may be the same as or different from each other. In this embodiment, as shown to Fig.8 (a), when seen from the surface 21 side, the some through-hole 26 is located in the mutually substantially equal space | interval.

In addition, the through-hole 26 of this embodiment functions also as a site | part for pulling up the dura of the brain. That is, if a predetermined metal wire is inserted through the through hole 26, the dura mater of the brain can be pulled up. At this time, a plurality of insertion holes 27 located near the edge of the main body 2D can be used as necessary. That is, as shown in FIGS. 7 and 8, the main body 2D of the present embodiment has a plurality of insertion holes 27 that are located in the vicinity of the edge and penetrate from the front surface 21 to the back surface 22 of the main body 2D. Also have.
Since other configurations are the same as those of the plates 1A to 1C according to the first to third embodiments described above, the description thereof is omitted.

<Fifth Embodiment>
Next, a plate according to a fifth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 10, the same components as those in FIGS. 1 to 9 described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 10A, the plate 1E of the present embodiment includes pins 32E. The pin insertion portion 322E included in the pin 32E includes a first region 322a located on the tip end side, and a second region 322b connected to the first region 322a and located on the pin head 321 side. Have. The first region 322a has a diameter that increases toward the second region 322b.

  Here, when the maximum diameter of the first region 322a is d3, d3 and the diameter D3 of the through hole 26 described above have a relationship of d3> D3. In addition, when the length of the second region 322b is h and the length of the through hole 26 is H, it is preferable that h and H have a relationship of h ≧ H. In the present embodiment, h and H have a relationship of h = H. According to such a configuration, the following effects can be achieved.

  That is, since the diameter of the first region 322a becomes larger toward the second region 322b, the insertion property when the pin insertion portion 322E is inserted into the through hole 26 can be improved. Further, since the main body 2E is made of synthetic resin, even if d3> D3, the pin 32E can be moved in the direction of the arrow vi and pushed into the through hole 26 with a light force. The pin 32E can be attached to the main body 2E relatively easily during operation. Further, when the pin insertion portion 322E is inserted into the through-hole 26 until the pin head portion 321 contacts the surface 21 of the main body portion 2E, as shown in FIG. Since the rear surface 22 is engaged, the pin 32E can be prevented from coming off.

In the present embodiment, when the diameter of the second region 322b is d4, d4 and D3 have a relationship of d4 = D3.
Other configurations are the same as those of the plates 1A to 1D according to the first to fourth embodiments described above, and thus the description thereof is omitted.

<Sixth Embodiment>
Next, the plate which concerns on 6th Embodiment of this invention is demonstrated in detail with reference to FIG. In FIG. 11, the same components as those in FIGS. 1 to 10 described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 11, the plate 1F of the present embodiment includes pins 32F. The pin insertion portion 322F included in the pin 32F further includes a slit 322c extending from the tip portion toward the pin head portion 321.

According to such a configuration, the insertability of the pin 32F into the through hole 26 of the main body 2F can be improved. That is, when the pin insertion portion 322F of the pin 32F is inserted into the through hole 26, the pin insertion portion 322F is deformed so that the width w of the slit 322c is reduced. As a result, the pin 32F can be smoothly inserted into the through hole 26.
Other configurations are the same as those of the plates 1A to 1E according to the first to fifth embodiments described above, and thus the description thereof is omitted.

<Seventh embodiment>
Next, a plate according to a seventh embodiment of the present invention will be described in detail with reference to FIG. In FIG. 12, the same components as those in FIGS. 1 to 11 described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 12A, the plate 1G of this embodiment includes a plurality of pins 32G. In the present embodiment, the plurality of pins 32G are connected to each other. According to such a configuration, it is possible to prevent the pin 32G from rotating when the pin 32G is attached to the main body 2G (not shown).

  In the present embodiment, the plurality of pins 32G are connected to each other by being integrally formed with the connecting member 33a. More specifically, in this embodiment, the pin head 321 of the pin 32G and the connecting member 33a are integrally formed. According to such a configuration, the above-described effects can be achieved while maintaining the insertability of the pin 32G into the through hole 26.

  Moreover, this embodiment can employ | adopt a structure as shown in FIG.12 (b) as the modification. That is, in this modification, as shown in FIG. 12B, the plurality of pins 32G are coupled to each other via the plate-shaped coupling member 33b. The plate-like connecting member 33 b has a plurality of connecting holes 331. By moving the pin 32G in the direction of the arrow vii and inserting the pin insertion portion 322 into each of the plurality of connection holes 331, the plurality of pins 32G can be connected to each other.

In the present embodiment, the plurality of pins 32G are connected to each other by the connecting members 33a and 33b. However, the plurality of pins 32G can be connected to each other without using the connecting members 33a and 33b. If a specific example is given, the structure etc. which directly connect each pin head 321 of the some pin 32G will be mentioned.
Other configurations are the same as those of the plates 1A to 1F according to the first to sixth embodiments described above, and thus the description thereof is omitted.

<Eighth Embodiment>
Next, a plate according to an eighth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 13, the same components as those in FIGS. 1 to 12 described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown to Fig.13 (a), the plate 1H of this embodiment is provided with the main-body part 2H and the pin 32H. In the present embodiment, the pin insertion portion 322H of the pin 32H is located over the entire circumference of the substantially central portion, and has a convex portion 322d that is convex outward.

  Further, in the present embodiment, the through hole 26H of the main body 2H is located over the entire circumference of the substantially central portion of the inner wall surface 261, and the concave portion 261a that is concave toward the inside of the main body 2H is provided. Have. The concave portion 261a is configured to be able to be fitted into the concave portion with respect to the convex portion 322d of the pin insertion portion 322H.

  According to such a configuration, as shown in FIG. 13B, when the pin insertion portion 322H is inserted into the through hole 26H, the concave portion 261a and the convex portion 322d are engaged with each other so that the pin 32H is removed. Can be suppressed.

In the present embodiment, the pin insertion portion 322H has the convex portion 322d and the through hole 26H has the concave portion 261a. However, the reverse configuration may be employed. In other words, the pin insertion portion 322H may have a recess, and the through hole 26H may be located on the inner wall surface 261 and may have a protrusion that can be engaged with the recess of the pin insertion portion 322H.
Other configurations are the same as those of the plates 1A to 1G according to the first to seventh embodiments described above, and thus the description thereof is omitted.

<Ninth Embodiment>
Next, a plate according to a ninth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 14, the same components as those in FIGS. 1 to 13 described above are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 14A, the plate 1I of the present embodiment includes pins 32I. The pin insertion portion 322I included in the pin 32I has a screw shape. According to such a configuration, since the pin insertion portion 322I can be screwed into the through hole 26 of the main body portion 2I, the holding force for holding the pin 32I in the through hole 26 can be improved.

Moreover, this embodiment can employ | adopt a structure as shown in FIG.14 (b) as the modification. That is, in this modification, as shown in FIG. 14B, the screw-like pin insertion portion 322I has a cutout portion 322e positioned at the tip portion. According to such a configuration, chips generated when the pin insertion part 322I is screwed into the through hole 26 can be discharged through the notch part 322e, so that clogging due to the chips can be suppressed.
Since other configurations are the same as those of the plates 1A to 1H according to the first to eighth embodiments described above, the description thereof is omitted.

<Tenth Embodiment>
Next, a plate according to a tenth embodiment of the present invention will be described in detail with reference to FIG. In FIG. 15, the same components as those in FIGS. 1 to 14 described above are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 15, the plate 1J of the present embodiment includes pins 32J. In the present embodiment, the pin 32J is hollow. According to such a configuration, body fluid can be discharged in the direction of arrow viii through the pin 32J by attaching the pin 32J to the main body 2J.
Other configurations are the same as those of the plates 1A to 1I according to the first to ninth embodiments described above, and thus the description thereof is omitted.

  As mentioned above, although some embodiment which concerns on this invention was illustrated, this invention is not limited to embodiment mentioned above, It cannot be overemphasized that it can be made arbitrary, unless it deviates from the summary of this invention. .

  For example, the plate according to the present invention is not limited to the plates according to the first to tenth embodiments described above, and may be a plate according to an embodiment in which the plates according to the embodiments are combined. .

  Moreover, you may make it provide the imaging | contrast property by at least one of X-ray and MRI to main-body part itself. As a specific example, the metal powder or ceramic powder is contained in the synthetic resin constituting the main body, or the metal powder or ceramic powder is sprayed on the surface of the main body by blasting or the like, and the metal powder or ceramic powder is sprayed on the surface of the main body. The structure etc. which make ceramic powder bite into are mentioned. According to such a configuration, it is possible to impart contrast to the main body itself by at least one of X-rays and MRI.

DESCRIPTION OF SYMBOLS 1 Skull plate 2 Main body part 21 Surface 22 Back surface 23 Outer peripheral surface 24 Groove part 241 Outer groove 241a One end part 241b Other end part 242 Inner groove 25 Hole part 25a Opening part 26 Through hole 261 Inner wall surface 261a Recessed part 27 Insertion hole 3 Position Confirmation member 31 Wire 32 Pin 321 Pin head 322 Pin insertion part 322a First region 322b Second region 322c Slit 322d Protrusion 322e Notch 33a, 33b Connection member 331 Connection hole 100 Skull 101 Defect

Claims (20)

It is plate-shaped, and the main body made of synthetic resin,
A skull plate comprising: a position confirmation member attached to the main body portion and having a contrast property by at least one of an X-ray and a nuclear magnetic resonance imaging method.   The skull plate according to claim 1, wherein the synthetic resin is one selected from an ultrahigh molecular weight polyethylene resin, a polymethyl methacrylate resin, and a polyether ether ketone resin.   The skull plate according to claim 1 or 2, wherein the position confirmation member has a wire shape and is made of metal. The position confirmation member is in the form of a wire,
The main body has a groove located on at least one of its surface and outer peripheral surface,
The skull plate according to any one of claims 1 to 3, wherein the wire-shaped position confirmation member is attached to the main body in a state of being accommodated in the groove. The groove is
An outer groove having one end located on the surface or the outer peripheral surface;
An inner groove that is located on the inner side of the outer groove and connected to the other end of the outer groove, and is substantially circular in a cross-sectional view perpendicular to the longitudinal direction of the groove, Have
When the diameter of the wire-shaped position confirmation member is d1, the groove width of the outer groove is W, and the diameter of the inner groove is D1, the d1, W, and D1 have a relationship of W <d1 ≦ D1. The skull plate according to claim 4.   The skull plate according to claim 4 or 5, wherein the main body portion has a plurality of the groove portions.   The skull plate according to claim 6, wherein at least two of the plurality of grooves intersect each other. The position confirmation member is in the form of a wire,
The main body portion has a hole portion having at least one opening portion opened on a surface or an outer peripheral surface thereof,
The skull plate according to any one of claims 1 to 7, wherein the wire-shaped position confirmation member is attached to the main body in a state of being inserted into the hole from the at least one opening.   The skull plate according to claim 8, wherein d1 and D2 have a relationship of d1≥D2, where d1 is a diameter of the wire-shaped position confirmation member and D2 is a diameter of the hole.   The skull plate according to claim 1 or 2, wherein the position confirmation member has a pin shape and is made of metal or ceramics. The position confirmation member has a pin head and a substantially columnar pin insertion portion connected to the pin head, and is in the shape of a pin.
The main body has a through hole penetrating from the front surface to the back surface;
The skull plate according to claim 1, 2, or 10, wherein the pin-like position confirmation member is attached to the main body in a state where the pin insertion portion is inserted into the through hole.   The skull plate according to claim 11, wherein d2 and D3 have a relationship of d2≥D3, where d2 is a diameter of the pin insertion portion and D3 is a diameter of the through hole. The pin insertion part is
A first region located on the tip side;
A second region connected to the first region and located on the pin head side,
The first region has a diameter that increases toward the second region;
When the maximum diameter of the first region is d3 and the diameter of the through hole is D3, d3 and D3 have a relationship of d3> D3,
The skull plate according to claim 11, wherein h and H have a relationship of h ≧ H, where h is a length of the second region and H is a length of the through hole.   The said pin insertion part is a skull plate in any one of Claims 11-13 which has a slit extended toward the said pin head from the front-end | tip part.   The skull plate according to any one of claims 11 to 14, wherein the main body has a plurality of the through holes.   The skull plate according to claim 15, comprising a plurality of pin-shaped position confirmation members and connecting the plurality of pin-shaped position confirmation members to each other. The pin insertion part has a convex part or a concave part,
The said through-hole is for the skull in any one of Claims 11-16 which has the recessed part or convex part which is located in the inner wall surface and can carry out uneven fitting to the said convex part or the said recessed part of the said pin insertion part. plate.   The skull plate according to any one of claims 11 to 16, wherein the pin insertion portion has a screw shape.   The skull plate according to claim 18, wherein the screw-like pin insertion portion has a cutout portion located at a distal end portion.   The skull plate according to any one of claims 10 to 19, wherein the pin-shaped position confirmation member is hollow.

Images