JP3011581U - Spacer for acetabular osteotomy - Google Patents
Spacer for acetabular osteotomyInfo
- Publication number
- JP3011581U JP3011581U JP1565594U JP1565594U JP3011581U JP 3011581 U JP3011581 U JP 3011581U JP 1565594 U JP1565594 U JP 1565594U JP 1565594 U JP1565594 U JP 1565594U JP 3011581 U JP3011581 U JP 3011581U
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- JP
- Japan
- Prior art keywords
- acetabular
- spacer
- osteotomy
- triangular prism
- bone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
(57)【要約】
【目的】 体内に吸収される性質の吸収ピンを用いて臼
蓋回転骨切り術を行なえる臼蓋回転骨切り術用スペーサ
を提供すること。
【構成】 臼蓋部分３０１を腸骨壁７から骨切りし外側
に回転移動させた状態で生じる骨間隙に挿入されるスペ
ーサ２１であって、臼蓋部分３０１あるいは腸骨壁７の
一方の骨切り面３０１Ａに接触する平面部２１０１と、
他方の骨切り面７Ａの凹部７Ａー１に挿入される突部２
１０３とを備え、少なくとも表面が生体親和性材料で形
成されている。
(57) [Abstract] [Purpose] To provide a spacer for acetabular osteotomy, which can perform acetabular osteotomy using an absorption pin that is absorbed into the body. A spacer 21, which is inserted into a bone gap generated when the acetabular portion 301 is cut from the iliac wall 7 and rotationally moved outward, and which is one of the acetabular portion 301 and the iliac wall 7 A flat surface portion 2101 that contacts the cut surface 301A,
Protrusion 2 to be inserted into recess 7A-1 of the other bone cutting surface 7A
103, and at least the surface is formed of a biocompatible material.
Description
【０００１】[0001]
本考案は人体における股関節の亜脱臼等を治癒する際に用いるスペーサに関す る。 The present invention relates to a spacer used for healing subluxation of the hip joint in the human body.
【０００２】[0002]
股関節の亜脱臼は、例えば図４に示すように、骨盤１に形成されている寛骨臼 蓋３の形状が不完全であり、大腿骨頭５が寛骨臼蓋３中に良好な状態で受容され ていないと生じ、亜脱臼になると、臼蓋３と骨頭５間の関節軟骨が摩耗して疼痛 と可動制限を生じ、ついには、歩行不能に陥る。 このような寛骨臼蓋３の形状不完全による脱臼を補整する術式として、図４に 点線１１で示すように外側を厚く内側を薄くするように臼蓋部分３０１を骨切り し、図５に示すように、この臼蓋部分３０１を滑らせるようにして外側に回転移 動させ、金属製のピン１３により臼蓋部分３０１を適正な位置に固定する臼蓋回 転骨切り術が行われている。 しかしながら、金属製のピン１３を用いた場合、臼蓋部分３０１が固定された 後、ピン１３を摘出する手術を要し、患者に負担が掛かる問題がある他、金属の 刺激による腰痛の問題や、歩行訓練中に痛みを生じる等の問題があった。 For subluxation of the hip joint, for example, as shown in FIG. 4, the shape of the acetabular lid 3 formed on the pelvis 1 is incomplete, and the femoral head 5 is received in the acetabular lid 3 in a good state. If it is not performed and subluxation occurs, the articular cartilage between the acetabulum 3 and the epiphysis 5 is worn, causing pain and limitation of movement, and finally, it becomes impossible to walk. As a surgical method for correcting the dislocation due to the incomplete shape of the acetabular lid 3, the acetabular portion 301 is bone-cut so that the outer side is thicker and the inner side is thinner as shown by a dotted line 11 in FIG. As shown in Fig. 5, the acetabular portion 301 is slid and rotationally moved to the outside, and the acetabular rotator osteotomy is performed to fix the acetabular portion 301 to an appropriate position by the metal pin 13. ing. However, when the metal pin 13 is used, it is necessary to perform an operation to remove the pin 13 after the acetabular portion 301 is fixed, which causes a problem of placing a burden on the patient and a problem of low back pain caused by metal stimulation. However, there were problems such as causing pain during walking training.
【０００３】[0003]
一方、最近、体内で溶解もしくは分解して体内に吸収される性質の高分子物質 からなる吸収ピンが提供され始めている。 そこで、この吸収ピンを用いて臼蓋回転骨切り術を行えば、ピンを体内に残留 させておくことができ、ピンの摘出手術を省け、また、腰痛や歩行訓練中の痛み の問題を解消することが可能となる。 しかしながら、移動臼蓋部分３０１をノミと木槌により骨切りし、前外方に回 転させると、骨切り面の形状や移動範囲、及び骨切り面の凹凸等により、移動臼 蓋部分３０１の骨切り面３０１Ａと腸骨壁７の骨切り面７Ａには様々な隙間が生 じる。 On the other hand, recently, an absorption pin made of a polymer substance that is dissolved or decomposed in the body and is absorbed in the body has been started. Therefore, if the acetabular rotation osteotomy is performed using this absorption pin, the pin can be left in the body, the operation of removing the pin can be omitted, and the problems of low back pain and pain during walking training can be solved. It becomes possible to do. However, when the movable acetabular portion 301 is cut with a chisel and a mallet and rotated forward and outward, due to the shape and range of movement of the bone cutting surface and the unevenness of the bone cutting surface, etc. Various gaps are generated between the bone cutting surface 301A and the bone cutting surface 7A of the iliac wall 7.
【０００４】 そして、従来のように金属製のピン１３を用いれば、多少の隙間があっても臼 蓋部分３０１を安定した状態で固定できるが、吸収ピンは金属製のピン１３に比 べて固定性に劣ることから、隙間がある場合には吸収ピンで止めても臼蓋部分３ ０１は不安定な状態となり、臼蓋部分３０１を確実に固定できない問題があった 。 本考案は前記事情に鑑み案出されたものであって、本考案の目的は、吸収ピン を用いて臼蓋部分を確実に固定でき、吸収ピンを用いて臼蓋回転骨切り術を行な えるようにした臼蓋回転骨切り術用スペーサを提供することにある。Further, as in the conventional case, by using the metal pin 13, the mortar cover portion 301 can be fixed in a stable state even if there is a slight gap, but the absorption pin is more effective than the metal pin 13. Since the fixability is poor, the acetabular portion 301 becomes unstable even if it is stopped with an absorption pin when there is a gap, and there is a problem that the acetabular portion 301 cannot be reliably fixed. The present invention has been devised in view of the above circumstances, and an object of the present invention is to securely fix the acetabular portion using an absorption pin and to perform a rotational acetabular osteotomy using the absorption pin. The present invention is to provide a spacer for acetabular rotary osteotomy.
【０００５】[0005]
前記目的を達成するため本考案は、臼蓋部分を腸骨壁から骨切りし外側に回転 移動させた状態で生じる骨間隙に挿入されるスペーサであって、臼蓋部分あるい は腸骨壁の一方の骨切り面に接触する平面部と、他方の骨切り面の凹部に挿入さ れる突部とを備え、少なくとも表面が生体親和性材料で形成されていることを特 徴とする。 また、本考案は、臼蓋部分を腸骨壁から骨切りし外側に回転移動させた状態で 生じる骨間隙に挿入され、移動させた臼蓋部分を、体内で溶解もしくは分解して 体内に吸収される吸収ピンで固定する際に用いるスペーサであって、臼蓋部分あ るいは腸骨壁の一方の骨切り面に接触する平面部と、他方の骨切り面の凹部に挿 入される突部とを備え、少なくとも表面が生体親和性材料で形成されていること を特徴とする。 また、本考案は、前記スペーサがほぼ三角柱状に形成され、三角柱の三つの側 面のうちの一つの面で前記平面部が構成され、前記面に対向する三角柱の頂部で 前記突部が構成されていることを特徴とする。 また、本考案は、前記スペーサが、断面が直角三角形のほぼ三角柱状に形成さ れ、三角柱の三つの側面のうち直角三角形の底辺をなす側面で前記平面部が構成 され、前記面に対向する三角柱の頂部で前記突部が構成されていることを特徴と する。 また、本考案は、前記スペーサがアパタイト多孔体で形成されていることを特 徴とする。 また、本考案は、臼蓋部分を腸骨壁から骨切りし外側に回転移動させた状態で 生じる骨間隙に挿入されるスペーサであって、断面が直角三角形のほぼ三角柱状 に形成され、少なくとも表面が生体親和性材料で形成されていることを特徴とす る。 また、本考案は、前記直角三角形が二等辺直角三角形であることを特徴とする 。 また、本考案は、前記直角三角形が底辺の両側の角部が３０度と６０度をなす 直角三角形であることを特徴とする。 In order to achieve the above-mentioned object, the present invention provides a spacer to be inserted into a bone gap generated when the acetabular portion is cut from the iliac wall and rotationally moved to the outside. One of the features is that it has a flat portion that comes into contact with one of the bone cutting surfaces and a protrusion that is inserted into a recess of the other bone cutting surface, and that at least the surface is made of a biocompatible material. In addition, the present invention inserts the acetabular portion into the bone gap generated when the acetabular portion is cut from the iliac wall and rotated outward, and the moved acetabular portion is dissolved or decomposed in the body and absorbed into the body. A spacer used when fixing with an absorption pin, which is a flat part that comes into contact with one of the acetabular parts or the iliac wall, and a protrusion that is inserted into the concave part of the other osteotomy surface. And at least the surface is formed of a biocompatible material. Also, in the present invention, the spacer is formed in a substantially triangular prism shape, one of the three side surfaces of the triangular prism constitutes the flat portion, and the apex of the triangular prism facing the surface constitutes the protrusion. It is characterized by being. Also, in the present invention, the spacer is formed into a substantially triangular prism having a right-angled triangle in cross section, and the flat surface portion is constituted by the side surface forming the base of the right-angled triangle among the three side surfaces of the triangular prism, and the side surface faces the surface. It is characterized in that the protrusion is formed at the top of the triangular prism. Further, the present invention is characterized in that the spacer is formed of an apatite porous body. Further, the present invention is a spacer to be inserted into a bone gap generated when the acetabular portion is cut from the iliac wall and rotationally moved to the outside, and the cross section is formed into a substantially triangular prism having a right-angled triangle shape. The surface is formed of a biocompatible material. Further, the present invention is characterized in that the right triangle is an isosceles right triangle. Further, the present invention is characterized in that the right-angled triangle is a right-angled triangle whose corners on both sides of the base form 30 degrees and 60 degrees.
【０００６】[0006]
以下、本考案の実施例を添付図面に従って説明する。 図１は本考案に係る臼蓋回転骨切り術用スペーサを用いて補整された骨盤部分 の拡大図、図２（Ａ）はスペーサの正面図、図２（Ｂ）は同側面図を示す。 １は骨盤、３は寛骨臼蓋、５は大腿骨頭、７は腸骨壁、９は大腿骨で、図４に 点線１１に示すように骨切りされた臼蓋部分３０１が滑らせるように外側に回転 移動され、臼蓋部分３０１の骨切り面３０１Ａと腸骨壁７の骨切り面７Ａはそれ ぞれ凹凸状になっている。 ２１は本実施例に係る臼蓋回転骨切り術用スペーサで、臼蓋部分３０１の骨切 り面３０１Ａと腸骨壁７の骨切り面７Ａとの間の隙間に挿入されている。 スペーサ２１はアルミナ、アパタイト、リン酸カルシウム等のセラミックスや 、チタン、ジルコニウム等の金属、高分子物質等、生体親和性に優れた材料から なり、実施例では、アパタイト多孔体により形成され、体内に残留させておくこ とができる。 Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an enlarged view of a pelvis portion adjusted using the spacer for acetabular osteotomy according to the present invention, FIG. 2 (A) is a front view of the spacer, and FIG. 2 (B) is a side view thereof. 1 is the pelvis, 3 is the acetabular acetabulum, 5 is the femoral head, 7 is the iliac wall, and 9 is the femur. As shown by the dotted line 11 in FIG. The bone cutting surface 301A of the acetabular portion 301 and the bone cutting surface 7A of the iliac wall 7 are each ruggedly moved outward. Reference numeral 21 denotes a acetabular rotary osteotomy spacer according to this embodiment, which is inserted in a gap between the bone cutting surface 301A of the acetabular portion 301 and the bone cutting surface 7A of the iliac wall 7. The spacers 21 are made of ceramics such as alumina, apatite, calcium phosphate, etc., metals such as titanium, zirconium, etc., and materials having excellent biocompatibility, such as polymeric substances. You can keep it.
【０００７】 前記スペーサ２１は、実施例では図２（Ａ），（Ｂ）に示すように、角部が丸 く形成された断面が直角二等辺三角形の三角柱状に形成されている。 そして、直角二等辺三角形の底辺をなし三角柱の側面のうち最も大きい面積の 側面を構成する平面部２１０１が臼蓋部分３０１の骨切り面３０１Ａに当接され 、また、前記平面部２１０１に対向する頂部、すなわち突部２１０３が腸骨壁７ の骨切り面７Ａの凹部７Ａー１に当接され、従って、臼蓋部分３０１と腸骨壁７ の骨切り面３０１Ａ，７Ａの間の隙間に、ずれたり、倒れたりすることなく安定 した状態でスペーサ２１が挿入されている。 尚、図３（Ａ）に正面図で、図３（Ｂ）に側面図で示す底辺の両側の角部が３ ０度と６０度をなす断面が直角三角形の三角柱状に形成されたスペーサ２１を用 いる場合には、前記と同様に、最も大きい面積の側面を構成する平面部２１０１ が臼蓋部分３０１の骨切り面３０１Ａに当接され、また、突部２１０３が腸骨壁 ７の骨切り面７Ａの凹部７Ａー１に当接されて臼蓋部分３０１と腸骨壁７の骨切 り面３０１Ａ，７Ａの間の隙間に挿入される。 このようにスペーサ２１が挿入された状態で吸収ピン２３が臼蓋部分３０１と 腸骨壁７とにわたって打ち込まれ、臼蓋部分３０１が固定されている。In the embodiment, as shown in FIGS. 2A and 2B, the spacer 21 is formed into a triangular prism shape having a right angled isosceles triangle with a rounded corner. Then, the flat surface portion 2101 forming the side surface having the largest area among the side surfaces of the triangular prism which forms the base of the right-angled isosceles triangle is brought into contact with the osteotomy surface 301A of the acetabular portion 301 and faces the flat surface portion 2101. The apex, that is, the protrusion 2103 is brought into contact with the recessed portion 7A-1 of the bone cutting surface 7A of the iliac wall 7, and therefore, in the gap between the acetabular portion 301 and the bone cutting surfaces 301A, 7A of the iliac wall 7, The spacer 21 is inserted in a stable state without slipping or falling. It is to be noted that the spacer 21 shown in the front view of FIG. 3 (A) and the side view of FIG. 3 (B) is formed into a triangular prism having a cross section of a right triangle having sides of 30 degrees and 60 degrees. In the same manner as described above, the flat surface portion 2101 constituting the side surface having the largest area is brought into contact with the bone cutting surface 301A of the acetabular portion 301, and the protrusion 2103 is used for the bone of the iliac wall 7 as described above. It is brought into contact with the recess 7A-1 of the cut surface 7A and inserted into the gap between the acetabular portion 301 and the bone cut surfaces 301A, 7A of the iliac wall 7. In this way, with the spacer 21 inserted, the absorption pin 23 is driven across the acetabular portion 301 and the iliac wall 7, and the acetabular portion 301 is fixed.
【０００８】 実施例に係るスペーサ２１は、例えば、次のように製作される。 まず、湿式合成により得られたハイドロキシアパタイト粉末２００ｇに粉末状 卵白アルブミン１００ｇを添加し、乾式ボールミルで穏やかに混合する。 次に、得られた混合粉末に水５００ｇを添加し、ハンドミキサーで１５分間撹 拌泡立てた後、直径２０ｃｍ、深さ５ｃｍのガラスシャーレに移し、８０℃の乾 燥機内で２４時間乾燥し、多孔質乾燥体を得る。 次に、この多孔質乾燥体を三角柱状に切り出し、数値制御式旋盤及びフライス で、焼成収縮率を考慮した寸法で、図２（Ａ），（Ｂ）或は図３（Ａ），（Ｂ） に示す形状に加工し、電気炉中で１２００℃で３時間焼成し、スペーサ２１を得 る。 なお、電気炉中で１２００℃で３時間焼成し、体積、重量、理論密度より気孔 率を測定したところ、６０％であった。The spacer 21 according to the embodiment is manufactured as follows, for example. First, 100 g of powdered ovalbumin is added to 200 g of hydroxyapatite powder obtained by wet synthesis, and gently mixed with a dry ball mill. Next, 500 g of water was added to the obtained mixed powder, and the mixture was agitated with a hand mixer for 15 minutes, transferred to a glass petri dish having a diameter of 20 cm and a depth of 5 cm, and dried in a dryer at 80 ° C. for 24 hours, A porous dried body is obtained. Next, the porous dried body was cut into a triangular prism shape, and the size was adjusted in consideration of the firing shrinkage with a numerically controlled lathe and a milling machine, and the shape shown in FIG. 2 (A), (B) or FIG. 3 (A), (B) was used. ) Is processed and baked in an electric furnace at 1200 ° C. for 3 hours to obtain spacers 21. The porosity was 60% when the porosity was measured from the volume, weight and theoretical density after firing at 1200 ° C. for 3 hours in an electric furnace.
【０００９】 本実施例に係るスペーサ２１を用いれば、平面部２１０１と突部２１０３とを 備えた形状であるため、臼蓋部分３０１と腸骨壁７の骨切り面３０１Ａ，７Ａの 間の隙間にずれたり、倒れたりすることなく安定した状態で挿入できる。 これにより、臼蓋部分３０１と腸骨壁７の骨切り面３０１Ａ，７Ａの間の隙間 が塞がれ、臼蓋部分３０１を安定させることができ、体内に残留させておくこと ができる吸収ピン２３を用いて臼蓋部分３０１を確実に固定できる。 そして、スペーサ２１も体内に残留させておくことができるので、金属製のピ ン１３を用いる方式に比べ、後で体外に取り出す手術を省いて患者をこの種の摘 出手術から開放でき、金属の刺激による腰痛や歩行訓練中の痛みの問題を解消す ることができる。 また、スペーサ２１は、種々の大きさのものを予め多数用意しておくことがで き、その都度、適宜大きさのスペーサ２１を選択することで、臼蓋部分３０１を 安定して固定できる。When the spacer 21 according to the present embodiment is used, since the spacer 21 has a shape including the flat surface portion 2101 and the projection portion 2103, the space between the acetabular portion 301 and the osteotomy surfaces 301A, 7A of the iliac wall 7 is reduced. Can be inserted in a stable state without slipping or falling. As a result, the gap between the acetabular portion 301 and the osteotomy surfaces 301A, 7A of the iliac wall 7 is closed, and the acetabular portion 301 can be stabilized and can be left in the body. 23 can be used to securely fix the acetabular portion 301. Further, since the spacer 21 can also be left inside the body, compared with the method using the metal pin 13, it is possible to omit the surgery to be taken out of the body later and release the patient from this type of excision operation. The problem of low back pain due to irritation and pain during gait training can be resolved. Further, a large number of spacers of various sizes can be prepared in advance, and by selecting a spacer 21 of an appropriate size each time, the acetabular portion 301 can be stably fixed.
【００１０】 尚、実施例では一つのスペーサ２１を用いた場合について説明したが、用いる スペーサ２１の数は一つに限らず複数であってもよい。 また、実施例ではスペーサ２１が三角柱状に形成されている場合について説明 したが、その形状は任意で、臼蓋部分３０１と腸骨壁７の一方の骨切り面に接触 する面と、他方の骨切り面の凹部に挿入される突部を備えていればよく、例えば 、半円柱状に形成されていてもよい。 また、スペーサ２１は、実施例のように生体親和性材料からその全体を形成す る必要はなく、少なくともその表面が生体親和性材料で形成されていればよい。In the embodiment, the case where one spacer 21 is used has been described, but the number of the spacers 21 used is not limited to one and may be plural. Further, in the embodiment, the case where the spacer 21 is formed in a triangular prism shape has been described, but the shape is arbitrary, and the surface of the acetabular portion 301 and the surface of the iliac wall 7 that contacts one bone cutting surface and the other surface. The projection may be inserted into the recess of the bone cutting surface, and may be formed in a semi-cylindrical shape, for example. Further, the spacer 21 does not have to be entirely formed of a biocompatible material as in the embodiment, and at least the surface thereof may be formed of the biocompatible material.
【００１１】[0011]
以上の説明で明らかなように、本考案に係るスペーサによれば、骨切りして回 転移動させた臼蓋部分を安定させ、体内に残留させておくことができる吸収ピン を用いて臼蓋部分を確実に固定できる。 その結果、吸収ピンを用いて臼蓋回転骨切り術を行えるようになり、臼蓋固定 用ピンの摘出手術から患者を開放でき、腰痛や歩行訓練中の痛みの問題を解消す ることができる。 As is clear from the above description, according to the spacer of the present invention, the acetabular portion that uses the absorption pin that stabilizes the acetabular portion that has been bone-cut and rotatably moved and can remain in the body is used. The part can be fixed securely. As a result, acetabular rotation osteotomy can be performed using the absorption pin, the patient can be released from the operation of removing the acetabular fixation pin, and the problems of low back pain and pain during walking training can be solved. .
【図１】本考案に係る臼蓋回転骨切り術用スペーサを用
いて補整された骨盤部分の拡大図である。FIG. 1 is an enlarged view of a pelvis portion adjusted using a acetabular rotary osteotomy spacer according to the present invention.
【図２】（Ａ）は本考案に係る臼蓋回転骨切り術用スペ
ーサの正面図、（Ｂ）は同側面図である。2A is a front view of a acetabular rotary osteotomy spacer according to the present invention, and FIG. 2B is a side view thereof.
【図３】（Ａ）は本考案に係る臼蓋回転骨切り術用スペ
ーサの正面図、（Ｂ）は同側面図である。3A is a front view of a acetabular rotary osteotomy spacer according to the present invention, and FIG. 3B is a side view thereof.
【図４】亜脱臼状態の説明図である。FIG. 4 is an explanatory view of a subluxation state.
【図５】骨切りして回転移動させた臼蓋部分を金属製の
ピンにより固定した臼蓋回転骨切り術の説明図である。FIG. 5 is an explanatory view of a acetabular rotary osteotomy in which a acetabular portion, which has been bone-cut and rotationally moved, is fixed by a metal pin.
１ 骨盤 ３ 寛骨臼蓋 ３０１ 臼蓋部分 ３０１Ａ 骨切り面 ５ 大腿骨頭 ７ 腸骨壁 ７Ａ 骨切り面 ９ 大腿骨 １３ 金属製のピン ２１ スペーサ ２３ 吸収ピン 1 Pelvis 3 Acetabular acetabulum 301 Acetabular part 301A Bone cutting surface 5 Femoral head 7 Iliac wall 7A Bone cutting surface 9 Femur 13 Metal pin 21 Spacer 23 Absorption pin
Claims (8)
転移動させた状態で生じる骨間隙に挿入されるスペーサ
であって、 臼蓋部分あるいは腸骨壁の一方の骨切り面に接触する平
面部と、他方の骨切り面の凹部に挿入される突部とを備
え、 少なくとも表面が生体親和性材料で形成されている、 ことを特徴とする臼蓋回転骨切り術用スペーサ。1. A spacer to be inserted into a bone gap generated when the acetabular portion is cut from the iliac wall and rotationally moved outward, the spacer being provided on one of the acetabular portion and the iliac wall. A acetabular rotary osteotomy spacer, comprising: a flat surface portion that comes into contact with the projection portion; and a projection portion that is inserted into a recessed portion of the other osteotomy surface, at least the surface of which is formed of a biocompatible material.
転移動させた状態で生じる骨間隙に挿入され、移動させ
た臼蓋部分を、体内で溶解もしくは分解して体内に吸収
される吸収ピンで固定する際に用いるスペーサであっ
て、 臼蓋部分あるいは腸骨壁の一方の骨切り面に接触する平
面部と、他方の骨切り面の凹部に挿入される突部とを備
え、 少なくとも表面が生体親和性材料で形成されている、 ことを特徴とする臼蓋回転骨切り術用スペーサ。2. The acetabular portion is inserted into a bone gap generated when the acetabular portion is cut from the iliac wall and rotationally moved outward, and the moved acetabular portion is dissolved or decomposed in the body and absorbed into the body. A spacer used when fixing with an absorption pin, comprising a flat portion that comes into contact with one bone cutting surface of the acetabular portion or the iliac wall, and a protrusion that is inserted into a recess of the other bone cutting surface. A spacer for acetabular osteotomy, characterized in that at least the surface is formed of a biocompatible material.
れ、三角柱の三つの側面のうちの一つの面で前記平面部
が構成され、前記面に対向する三角柱の頂部で前記突部
が構成されている請求項１または２記載の臼蓋回転骨切
り術用スペーサ。3. The spacer is formed in a substantially triangular prism shape, one of the three side surfaces of the triangular prism constitutes the plane portion, and the apex of the triangular prism facing the surface constitutes the protrusion. The spacer for acetabular rotary osteotomy according to claim 1 or 2.
三角柱状に形成され、三角柱の三つの側面のうち直角三
角形の底辺をなす側面で前記平面部が構成され、前記面
に対向する三角柱の頂部で前記突部が構成されている請
求項１または２記載の臼蓋回転骨切り術用スペーサ。4. The spacer is formed in a substantially triangular prism shape having a right-angled triangle in cross section, and the flat surface portion is constituted by the side surface forming the base of the right-angled triangle among the three side surfaces of the triangular prism, and the top portion of the triangular prism facing the surface. The acetabular rotary osteotomy spacer according to claim 1 or 2, wherein the protrusion is formed by.
されている請求項１，２，３または４記載の臼蓋回転骨
切り術用スペーサ。5. The spacer for rotational acetabular osteotomy according to claim 1, 2, 3 or 4, wherein the spacer is formed of an apatite porous body.
転移動させた状態で生じる骨間隙に挿入されるスペーサ
であって、 断面が直角三角形のほぼ三角柱状に形成され、 少なくとも表面が生体親和性材料で形成されている、 ことを特徴とする臼蓋回転骨切り術用スペーサ。6. A spacer to be inserted into a bone gap generated when the acetabular portion is cut from the iliac wall and rotationally moved outward, the cross section being formed into a substantially triangular prism having a right triangle, and at least the surface thereof. Is formed of a biocompatible material, and is a spacer for rotational acetabular osteotomy.
る請求項６記載の臼蓋回転骨切り術用スペーサ。7. The acetabular rotary osteotomy spacer according to claim 6, wherein the right triangle is an isosceles right triangle.
０度と６０度をなす直角三角形である請求項６記載の臼
蓋回転骨切り術用スペーサ。8. The right triangle has three corners on both sides of the base.
The acetabular rotary osteotomy spacer according to claim 6, which is a right-angled triangle that forms 0 degrees and 60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1565594U JP3011581U (en) | 1994-11-25 | 1994-11-25 | Spacer for acetabular osteotomy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1565594U JP3011581U (en) | 1994-11-25 | 1994-11-25 | Spacer for acetabular osteotomy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3011581U true JP3011581U (en) | 1995-05-30 |
Family
ID=43147309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1565594U Expired - Lifetime JP3011581U (en) | 1994-11-25 | 1994-11-25 | Spacer for acetabular osteotomy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3011581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013520209A (en) * | 2009-02-24 | 2013-06-06 | スミス アンド ネフュー インコーポレーテッド | FAI surgical method and apparatus |
-
1994
- 1994-11-25 JP JP1565594U patent/JP3011581U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013520209A (en) * | 2009-02-24 | 2013-06-06 | スミス アンド ネフュー インコーポレーテッド | FAI surgical method and apparatus |
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