JP4418122B2 - Intramedullary nail - Google Patents

Intramedullary nail Download PDF

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Publication number
JP4418122B2
JP4418122B2 JP2001107822A JP2001107822A JP4418122B2 JP 4418122 B2 JP4418122 B2 JP 4418122B2 JP 2001107822 A JP2001107822 A JP 2001107822A JP 2001107822 A JP2001107822 A JP 2001107822A JP 4418122 B2 JP4418122 B2 JP 4418122B2
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Prior art keywords
body member
intramedullary nail
pin
pins
bone
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JP2002253566A (en
JP2002253566A5 (en
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研一 三原
健治 山谷
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瑞穂医科工業株式会社
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72Intramedullary pins, nails or other devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72Intramedullary pins, nails or other devices
    • A61B17/7233Intramedullary pins, nails or other devices with special means of locking the nail to the bone
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72Intramedullary pins, nails or other devices
    • A61B17/7283Intramedullary pins, nails or other devices with special cross-section of the nail
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74Devices for the head or neck or trochanter of the femur
    • A61B17/742Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/744Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail

Description

【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、上腕骨骨折治療のための髄内釘に関する。 The present invention relates to an intramedullary nail for humeral fracture treatment.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
上腕骨近位端骨折治療に使用される器具には、いろいろなものがあり、髄内釘による治療もその一つである。 The instruments used proximal humeral fracture treatment, there are various things, treatment with the intramedullary nail is one of them. 上腕骨近位端骨折において、骨端からその骨髄内に髄内釘を挿入して、この髄内釘の側面に設けられた孔に骨の外側から横止めネジを挿入する事で、骨と髄内釘を係合し、骨折部を安定させて骨癒合させる手術法が採用される事がある。 In proximal humeral fractures, insert an intramedullary nail within the bone marrow from the epiphysis, by inserting the lateral set screw hole provided on a side surface of the intramedullary nail from the outside of the bone, and bone engaging the intramedullary nail, it is stabilized by sometimes surgical techniques for bone union is employed the fracture. このような手術法において、上腕骨の近位端骨折の場合は、骨頭内で横止めを行なう場合も少なくなく、骨の外側から挿入された横止めネジは、骨頭を貫通させる事なく、骨頭内で横止めネジを留め、骨と係合させる必要がある。 In such surgical method, in the case of the proximal end fractures of the humerus, not a few cases of performing lateral stop in the bone head, the lateral set screw inserted from the outside of the bone, without passing the femoral head, the femoral head fastening the lateral set screw in the inner, it is necessary to engage the bone.
【0003】 [0003]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
従来の横止め式髄内釘では、骨頭内の横止めネジと髄内釘は直接的には接合されていないため、骨頭内の骨が骨粗鬆である場合には、骨密度が低く、ネジ山に海綿骨が充分に係らないため、骨頭内の横止めネジが脱転したり等して、横止めネジの効果が充分に発揮できなかったり、患者に疼痛を与えたりする事が考えられる。 In a conventional lateral stop type intramedullary nail, for lateral locking screw and intramedullary nail in the bone head not to directly joined, when the bone in the femoral head is osteoporosis, the bone density is low, since the cancellous bone is not applied enough to screw thread, and the like or Datsuten the lateral set screw in the bone head, Ri effect of the lateral set screws can not be sufficiently exhibited, is that or giving pain to the patient Conceivable.
【0004】 [0004]
【課題を解決するための手段】 In order to solve the problems]
本発明では、骨密度が低い骨粗鬆の場合でも、骨頭内でピンが髄内釘の本体部材と確実に接合されている事で、ピンが容易に髄内釘と骨頭から脱転しない構造の上腕骨の近位端骨折に使用する治療器具である髄内釘を提供する。 In the present invention, even if the bone density is low osteoporosis, by pins in the bone head is securely joined with the body member of the intramedullary nail, pin does not readily de-rolling from the nail and the femoral head structure providing an intramedullary nail is a treatment instrument for use in the proximal end fractures of the humerus.
【0005】 [0005]
髄内釘の本体部材は2〜6本のピンを一つの固定ネジで同時に圧迫固定することで髄内釘とピンを接合し、より安定した固定を実現する事が出来る。 The body member of the intramedullary nail joining intramedullary nail and pins simultaneously compressed and secured 2-6 pins at one fixing screw, more stable fixing that can be achieved.
【0006】 [0006]
さらに、髄内釘の本体部材と接合されるピンはネジ形状を有したものであっても、当然、発明の効果は変わらない。 Further, pins that are joined to the body member of the intramedullary nail may be those having a screw shape, of course, the effect of the invention is not changed.
【0007】 [0007]
治療の作業性と充分な固定性を考えると、接合されるピンの本数は2〜6本が適当である。 Considering the workability and sufficient fixation of the treatment, the number of pins that are bonded 2-6 present is appropriate.
【0008】 [0008]
また、髄内釘には緩やかな湾曲がついている事により、骨頭への侵襲を大幅に低減する事も可能である。 In addition, by the fact that with a gentle curve to the intramedullary nail, it is also possible to significantly reduce the invasiveness of the femoral head.
【0009】 [0009]
ピンを髄内釘に接続する手段としては、他にはピンの一部に雄ネジを設け、髄内釘のピンを挿入するための横孔には、対応する雌ネジを設けて、ネジによる接続も当然考えられるが、この場合ピンを個々に髄内釘に接続しなければならない。 The means for connecting the pin to the intramedullary nail, other a male screw provided on a portion of the pin, the transverse bore for inserting the pin of the intramedullary nail, provided corresponding female thread, by a screw connection can also be naturally considered, but must be connected to this case pin individually to the intramedullary nail. 本発明であれば、複数のピンを同時に接続する事が可能であるため作業性に優れる。 If the present invention is excellent in workability since it is possible to connect a plurality of pins simultaneously.
【0010】 [0010]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
【0011】 [0011]
以下、本発明に係る髄内釘の一実施形態について説明する。 The following describes one embodiment of an intramedullary nail according to the present invention. この実施の形態では、上腕骨近位端骨折に使用した場合を例にとって説明する。 In this embodiment, the case of using the proximal humeral fractures is described as an example. 上腕骨近位端骨折にはいろいろな形態があるが、最も単純な骨折モデルについて説明する。 The proximal humeral fractures have various forms, it is described simplest fracture model.
【0012】 [0012]
上腕骨骨頭1が上腕骨骨幹部2と骨折部位3によって互いに不安定であるような骨折において、上腕骨近位端の骨髄腔4に角度bの湾曲を持った髄内釘5は挿入される。 The bone fracture as unstable mutually humeral head 1 by humeral diaphysis 2 and the fracture site 3, the intramedullary nail 5 having a curved angle b is inserted into the medullary cavity 4 of the proximal humerus .
【0013】 [0013]
髄内釘5の湾曲角度bを10°〜40°程度にする事で、髄内釘5を骨髄内に挿入する際に、挿入位置を比較的侵襲の少ない大結節10付近にする事が可能となる。 By the bending angle b of the nail 5 to about 10 ° to 40 °, when inserting the intramedullary nail 5 into the bone marrow, it can be the insertion position to a relatively less invasive greater tuberosity 10 near to become.
【0014】 [0014]
ピン7は髄内釘5が挿入されたあとで、骨皮質の外側より、髄内釘5に設けられた貫通孔である横孔12に挿入される。 Pin 7 after the Zuinaikugi 5 is inserted, is inserted from the outside of the bone cortex, the lateral hole 12 is a through hole provided in intramedullary nail 5. さらに挿入されたピン7は、 固定部材である固定ネジ8を締めることによって、ピン7を圧迫固定して、髄内釘5に接合される。 Pin 7 is inserted further, by tightening the fixing screw 8 which is a fixed member, the pin 7 compresses fixed is bonded to the intramedullary nail 5. このピン7が固定されることにより上腕骨骨頭1は髄内釘5と係合されていることとなる。 Humeral head 1 by the pin 7 is fixed so that the engaged and Zuinaikugi 5.
【0015】 [0015]
一方、上腕骨骨幹2は、骨ネジ9によって髄内釘5と係合されているように構成されている為、このような上腕骨近位端骨折治療において、 骨折部位3が治癒するまでの期間において骨折部3を安定させて治療することができる。 On the other hand, humerus diaphysis 2, since that is configured to engaged with the intramedullary nail 5 by bone screws 9, in such a proximal humeral fracture treatment, until healing fracture site 3 the fracture 3 can be treated to stabilize in the period.
【0016】 [0016]
このとき、ピン7は髄内釘5と確実に接合されているため、特に高齢者などで骨頭内の骨密度が低い場合においてピン7が骨の外へ脱転してくる恐れはない。 In this case, the pin 7 because it is securely bonded to the Zuinaikugi 5, there is no fear that the pin 7 comes de rolling out of the bone, particularly in the case the bone density in the femoral head in elderly is low.
【0017】 [0017]
図2は、髄内釘5を近位直上から見た際の図であるが、2本のピン7はお互いに10°〜90°の角度aを持つように構成されているため、上腕骨骨頭1をより安定させて係合させることが出来る。 2, since it is a diagram when viewed intramedullary nail 5 from the proximal immediately above, the two pins 7, which is configured to have an angle a of each other 10 ° to 90 °, humerus femoral head 1 more stably be allowed to engage to it as possible.
【0018】 [0018]
また、2本のピン7の先端11は、球面状または鈍角となっており、上腕骨骨頭1を突き抜ける事無く骨頭の内側で留まる様な形状となっている。 The tip 11 of the two pins 7, has a spherical shape or an obtuse angle, and has a no such shape stays inside the femoral head that penetrate the humeral head 1.
【0019】 [0019]
次に髄内釘5の形状について図3と図4に示し、説明する。 Next, the shape of the nail 5 shown in FIGS. 3 and 4, it will be described. 図3は髄内釘5の正面図であり、近位側には、ピン7を通すための貫通孔 12Aと貫通孔 12Bが設けてある。 Figure 3 is a front view of Zuinaikugi 5, the proximal side, the through hole 12A and the through hole 12B for passing the pin 7 is provided. また遠位側には、 骨ネジ 9を通すための孔13と孔14が設けてある。 Also the distal side, is provided with a hole 13 and the hole 14 for the passage of the bone screws 9.
【0020】 [0020]
図4は髄内釘5の側面図であり、近位端15には、固定ネジ8をガイドするための髄内釘近位端ネジ部 16を有している。 Figure 4 is a side view of Zuinaikugi 5, the proximal end 15, and has an intramedullary nail the proximal end threaded portion 16 for guiding the fixing screw 8. また、 髄内釘近位端ネジ部 16の下孔17は、 貫通孔 12A、 貫通孔 12Bの所まで達している。 The lower hole 17 of the intramedullary nail the proximal end threaded portion 16, the through hole 12A, and reaches up to the through-hole 12B. 遠位端18は、 10° 〜45°の角度cがついており、髄内釘5を骨髄腔 4に挿入した時に、骨皮質を髄内釘5の遠位端18が突き破らないようになっている。 The distal end 18 is angled c of 10 ° to 45 °, the intramedullary nail 5 when inserted into the bone marrow cavity 4, so the distal end 18 of the intramedullary nail 5 cortical bone is not broken through ing.
【0021】 [0021]
図5はY−Y断面での髄内釘5の断面19である。 Figure 5 is a cross-sectional 19 of the intramedullary nail 5 in Y-Y cross section. 断面19は、髄内釘5の回旋固定性と剛性を上げるため、図のような形状をなしている。 Section 19, to increase the rotation fixing and rigidity of the intramedullary nail 5 has a shape as shown in FIG.
【0022】 [0022]
図7は、ピン7A、ピン7Bを固定する構造を示している、髄内釘5に挿入されたピン7A、ピン7Bは固定ネジ8の先端圧子20により圧迫されるように構成されている。 Figure 7 shows a structure for fixing pins 7A, the pin 7B, the inserted pins 7A to intramedullary nail 5, the pin 7B is configured to be pressed by the tip indenter 20 of the fixing screw 8.
【0023】 [0023]
図6はピン7Aとピン7Bの交差部での髄内釘5を直上から観た際の断面図であり、ピン7Aとピン7Bは角度aを持って交差している状態である。 Figure 6 is a sectional view when viewed from directly above the intramedullary nail 5 at the intersection of the pin 7A and pin 7B, the pin 7A and pin 7B is a state in which intersects at an angle a.
【0024】 [0024]
図8は髄内釘の中心軸での正面断面図であり、 貫通孔 12A、 貫通孔 12Bに通されたピン7A、ピン7Bは、図8のように固定ネジ8を締めて行くと、固定ネジの先端20によってピン7Aが下方のピン7Bを圧迫してゆき、ピン7A、7Bを固定することができる。 Figure 8 is a front sectional view of the center axis of the intramedullary nail, the through hole 12A, the pin 7A which passes through a through-hole 12B, the pin 7B, when we tighten the fixing screws 8 as shown in FIG. 8, the fixed pin 7A by screws at the tip 20 Yuki by squeezing the pins 7B of the lower, it is possible to fix the pin 7A, the 7B. 貫通孔 12A、 貫通孔 12Bはピンの外径よりも少し大きめの径であり、互いのピン7A、ピン7Bが固定ネジの先端圧子20により圧迫を受けた時に、充分接触できるように貫通孔 12A、 貫通孔 12Bは互いに重なり合う部分を有する孔である。 Through hole 12A, the through hole 12B is than the outer diameter of the pin is slightly larger diameter, mutual pins 7A, when the pin 7B is subjected to compression by the tip indenter 20 of the fixing screw, penetrating to allow sufficient contact hole 12A , through-holes 12B are holes having portions overlapping each other.
【0025】 [0025]
次にピンを多数本使用した時の実施例を示す。 Then shows an embodiment of when a number of Use pins. 図9の例では6本のピン22A〜Fを固定する構造を示した図であり、髄内釘に挿入されたピン22A〜Fは固定ネジ8により圧迫させるように構成されている。 In the example of FIG. 9 is a diagram showing a structure for fixing the six pins 22A~F, pin 22A~F inserted into the intramedullary nail is adapted to compress by a fixing screw 8.
【0026】 [0026]
図10は髄内釘の中心軸での正面断面図であり、 貫通孔23A〜23Fに通されたピン22A〜22Fは、図10のように固定ネジ8を締めて行くと、固定ネジの先端圧子20によってピン22Aが下方のピン22Bを圧迫してゆき、連鎖的にピン22C〜22Fを圧迫してゆき、ピン22A〜 22Fを固定することができる。 Figure 10 is a front sectional view of the center axis of the intramedullary nail, pin 22A~22F which passed through the through hole 23A~23F, when going tighten the locking screws 8 as shown in FIG. 10, the tip of the fixing screw pin 22A by the indenter 20 Yuki by squeezing the pin 22B of the lower, Yuki and compress the chain onto the pin 22C~22F, it is possible to fix the pins. 22A to 22F. 貫通孔 23A〜 23Fはピン22A〜22Fの外径よりも少し大きめの径であり、互いのピン22A〜 22Fが固定ネジ8の先端圧子20より圧迫を受けた時に、充分接触できるように貫通孔23A〜23Fは隣り合う孔が互いに重なり合う部分を有する孔となっている。 Holes. 23A to 23F is slightly larger than the outer diameter of the pin 22A-22F, when the mutual pin. 22A to 22F is subjected to compression from the tip indenter 20 of the fixing screw 8, through to allow sufficient contact hole 23A~23F has a hole having a portion with a hole adjacent mutually overlapping.
【0027】 [0027]
この様に原理的には複数のピンを固定する事が可能であるが、実用上適当と思われるピンの数は、術者の作業性などを考慮して2〜6本程度と考えられる。 Although this way in principle it is possible to fix a plurality of pins, the number of pins that would practically appropriate, considered to 2-6 present approximately in consideration of the operator's workability.
【0028】 [0028]
ピンの形状は、ネジやブレード形状であっても、この発明の機能を得る事が出来る。 The shape of the pin, even a screw or blade shape, it is possible to obtain a function of the present invention.
図11はピンの形状が中空ネジ形状である場合を示す。 Figure 11 shows the case where the shape of the pin is hollow screw shape. 図12は図11におけるネジ部の断面形状であり、孔25のような通し孔が施してある。 Figure 12 is a cross-sectional shape of the screw portion in FIG. 11, through-holes such as hole 25 are subjected.
【0029】 [0029]
図13は、先端にネジ形状26を有する場合を示した。 Figure 13 shows a case having a thread form 26 in the tip.
【0030】 [0030]
図14は、先端にブレード形状27を有するピンの形状であり、図15は図14の断面形状を示している。 Figure 14 is in the form of a pin having a blade shape 27 at the tip, and FIG. 15 shows a cross section of FIG. 14.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】 図1は、骨折部位に本発明品を使用した際の実施例の側面図を示す。 [1] Figure 1 shows a side view of an embodiment when using the present invention product in the fracture site.
【図2】 図2は、図1の本発明品を近位直上から見た際の平面図を示す。 Figure 2 shows a plan view when viewed in the present invention product 1 from the proximal immediately above.
【図3】 髄内釘の正面図を示す。 Figure 3 shows a front view of the intramedullary nail.
【図4】 髄内釘の側面図を示す。 FIG. 4 shows a side view of the intramedullary nail.
【図5】 髄内釘のY−Yでの断面図を示す。 Figure 5 shows a cross-sectional view at Y-Y of the intramedullary nail.
【図6】 2本のピンの構成と髄内釘を直上から見た際の断面図を示す。 Figure 6 shows a cross-sectional view when viewed from directly above the two pins constituting the intramedullary nail.
【図7】 髄内釘近位部の固定ネジ、髄内釘、2本のピンの構成を示した斜視断面図である。 [7] intramedullary nail the proximal portion of the fixing screw, the intramedullary nail is a perspective cross-sectional view showing a two pin configuration.
【図8】 図7において、Z−Zでの正面の断面図を示す。 In [8] FIG. 7 shows a sectional view of the front in the Z-Z.
【図9】 髄内釘近位部の固定ネジ、髄内釘、6本のピンの構成を示した斜視断面図である。 [9] intramedullary nail the proximal portion of the fixing screw, the intramedullary nail is a perspective cross-sectional view showing a six-pin configuration.
【図10】 図9において、Z−Zでの正面の断面図を示す。 In [10] FIG. 9 shows a cross-sectional view of the front in the Z-Z.
【図11】 中空ネジ部を有するピンの形状を示す。 Figure 11 shows the shape of a pin having a hollow threaded portion.
【図12】 中空ネジ部断面図を示す。 12 shows a hollow screw-sectional view.
【図13】 ネジを有するピンを示す。 13 shows a pin with a screw.
【図14】 ブレード形状を有するピンを示す。 Figure 14 shows a pin with a blade shape.
【図15】 ブレード部の断面図を示す。 Figure 15 shows a cross-sectional view of the blade portion.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 上腕骨骨頭 3 骨折部位 4 骨髄腔 5 髄内釘 1 humeral head 3 fracture site 4 marrow cavity 5 intramedullary nail
7,7A,7Bピン 8 固定ネジ 9 骨ネジ 7,7A, 7B pin 8 fixing screws 9 bone screws
12,12A,12Bピン挿入用の髄内釘の貫通孔 12, 12A, the through-hole of the intramedullary nail for 12B pin insertion
16 髄内釘近位端ネジ部 19 髄内釘断面図 22A〜 22Fピン 23A〜 23Fピン挿入用の髄内釘の貫通孔 16 intramedullary nail the proximal end threaded portion 19 intramedullary nail sectional view. 22A to 22F pin 23A~ holes of the intramedullary nail for 23F pin insertion
24 中空ネジ形状 26 ネジ形状 27 ブレード形状 24 hollow thread profile 26 thread shape 27 blade shape

Claims (5)

  1. 骨の骨髄腔に挿入可能な細長い本体部材における上記骨の骨頭に対応する部分に上記本体部材を横断して上記骨頭に入れられる複数本のピンを夫々挿入可能な複数個の貫通孔が、上記本体部材の軸上に配列され、これら貫通孔は隣り合うもの同士で互いに重なり合うように、かつ互いに所定角度を持つように形成され、ピンをその本体部材の各貫通孔に挿入して貫通孔内でピン同士を接触させた状態で、本体部材の一端に設置された本体部材軸上を移動しうる固定部材によりピンを圧迫することで、同時に全てのピンを本体部材と接合させるようにした事を特徴とする髄内釘。 A portion corresponding to the femoral head of the bone in the elongate body member insertable into the medullary space of a bone, said body member across the husband pins a plurality of which are placed in the femoral head people insertable plurality of through holes, are arranged on the axis of the body member, the through-holes with each other so as to overlap each other in what is adjacent and is formed to have a predetermined angle to each other, through by inserting the pin into the through holes of the body member bore in a state contacting the pin together with the inner, by squeezing the pin by a fixing member capable of moving on the body member shaft that is installed on one end of the body member, and all the pins simultaneously so as to be joined with the body member intramedullary nail, wherein a thing.
  2. 本体部材に接合されるピンが、ネジ、中空ネジ又はブレードの形状を有していることを特徴とする請求項1記載の髄内釘。 Pins, screws, intramedullary nail according to claim 1, characterized in that it has a shape of a hollow screw or blade which is joined to the body member.
  3. 本体部材軸上に移動する固定部材の移動手段が、固定部材と本体部材に設けられたネジによる作用で行われ、ネジの締め付け力によりピンが圧迫されるようにしたことを特徴とする請求項1又は請求項2に記載の髄内釘。 Claims moving means of the fixing member that moves on the body member axis, carried out by the action by the screw which is provided on the fixed member and the body member, characterized in that the pin has to be pressed by the clamping force of the screw 1 or intramedullary nail according to claim 2.
  4. 本体部材に挿入される複数本のピンの先端は、球面状になっている請求項1乃至請求項3のいずれかに記載の髄内釘。 Tips of the plurality of pins to be inserted into the body member, intramedullary nail according to any one of claims 1 to 3 has a spherical shape.
  5. 本体部材の骨髄内への挿入方向の先端には、本体部材先端の軸線に対し10°から45°の角度がついた平面が形成されたことを特徴とする請求項1乃至請求項4のいずれかに記載の髄内釘。 The insertion direction of the distal end into the bone marrow of the body member, one of the claims 1 to 4, characterized in that plane with a 45 ° angle from 10 ° to the axis of the body member distal end is formed intramedullary nail of crab described.
JP2001107822A 2001-03-01 2001-03-01 Intramedullary nail Active JP4418122B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001107822A JP4418122B2 (en) 2001-03-01 2001-03-01 Intramedullary nail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001107822A JP4418122B2 (en) 2001-03-01 2001-03-01 Intramedullary nail

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JP2002253566A5 JP2002253566A5 (en) 2002-09-10
JP2002253566A JP2002253566A (en) 2002-09-10
JP4418122B2 true JP4418122B2 (en) 2010-02-17

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050055024A1 (en) 2003-09-08 2005-03-10 James Anthony H. Orthopaedic implant and screw assembly
US7918853B2 (en) 2007-03-20 2011-04-05 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
CN100484483C (en) * 2004-02-23 2009-05-06 斯恩蒂斯有限公司 Intramedullary nail
DK1639953T3 (en) 2004-09-27 2008-09-29 Orthofix Srl Endomedullært as for the treatment of proximal femoral fractures
WO2011002903A2 (en) 2009-06-30 2011-01-06 Kohsuke Watanabe Orthopaedic implant and fastener assembly
US8449544B2 (en) 2009-06-30 2013-05-28 Smith & Nephew, Inc. Orthopaedic implant and fastener assembly
US8414582B2 (en) * 2009-07-01 2013-04-09 Synthes Usa, Llc Intramedullary nail and protruding screw locking mechanism
KR101419609B1 (en) 2012-12-18 2014-07-15 고려대학교 산학협력단 Splitted proximal femoral nail device
KR101909350B1 (en) * 2016-12-29 2018-10-17 인제대학교 산학협력단 Hybrid type bone curing unit

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