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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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Japan
Prior art keywords
intramedullary nail
body member
pin
main body
pins
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Expired - Fee Related
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JP2001107822A
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JP2002253566A5 (en
JP2002253566A (en
Inventor
研一 三原
健治 山谷
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Mizuho Ika Kogyo KK
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Mizuho Ika Kogyo KK
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Priority to JP2001107822A priority Critical patent/JP4418122B2/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails
    • A61B17/7233—Intramedullary devices, e.g. pins or nails with special means of locking the nail to the bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails
    • A61B17/7283—Intramedullary devices, e.g. pins or nails with special cross-section of the nail
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A61B17/742—Devices 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
    • A61B17/744—Devices 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

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、上腕骨骨折治療のための髄内釘に関する。
【０００２】
【従来の技術】
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。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。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。
【０００３】
【発明が解決しようとする課題】
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。
【０００４】
【課題を解決するための手段】
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。
【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。
【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。
【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。
【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。
【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。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。
【００１０】
【発明の実施の形態】
【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。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。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。
【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。
【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。
【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。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。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。
【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。
【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。
【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。
【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。
【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。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。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。
【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。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。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。
【００２１】
図５はＹ−Ｙ断面での髄内釘５の断面１９である。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。
【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。
【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。
【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。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。
【００２５】
次にピンを多数本使用した時の実施例を示す。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。
【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。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。
【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。
【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。
図１１はピンの形状が中空ネジ形状である場合を示す。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。
【００２９】
図１３は、先端にネジ形状２６を有する場合を示した。
【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。
【図面の簡単な説明】
【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。
【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。
【図３】 髄内釘の正面図を示す。
【図４】 髄内釘の側面図を示す。
【図５】 髄内釘のＹ−Ｙでの断面図を示す。
【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。
【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。
【図８】 図７において、Ｚ−Ｚでの正面の断面図を示す。
【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。
【図１０】 図９において、Ｚ−Ｚでの正面の断面図を示す。
【図１１】 中空ネジ部を有するピンの形状を示す。
【図１２】 中空ネジ部断面図を示す。
【図１３】 ネジを有するピンを示す。
【図１４】 ブレード形状を有するピンを示す。
【図１５】 ブレード部の断面図を示す。
【符号の説明】
１ 上腕骨骨頭
３ 骨折部位
４ 骨髄腔
５ 髄内釘
７，７Ａ，７Ｂ ピン
８ 固定ネジ
９ 骨ネジ
１２，１２Ａ，１２Ｂ ピン挿入用の髄内釘の貫通孔
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
２４ 中空ネジ形状
２６ ネジ形状
２７ ブレード形状[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intramedullary nail for the treatment of humeral fractures.
[0002]
[Prior art]
There are various instruments used for the treatment of proximal humeral fractures, and treatment with an intramedullary nail is one of them. In a proximal humeral fracture, an intramedullary nail is inserted into the bone marrow from the epiphysis, and a lateral set screw is inserted into the hole provided in the side of the intramedullary nail from the outside of the bone. A surgical method may be employed in which the intramedullary nail is engaged to stabilize the fracture and bone healing. In such a surgical procedure, in the case of a fracture of the proximal end of the humerus, there are not a few cases in which a lateral locking is performed within the head of the bone, and a lateral locking screw inserted from the outside of the bone does not penetrate the bone head, It is necessary to fasten the side set screw within and engage the bone.
[0003]
[Problems to be solved by the invention]
In the conventional lateral type intramedullary nail, the lateral screw and intramedullary nail in the head of the bone are not directly joined, so if the bone in the head is osteoporotic, 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]
[Means for Solving the Problems]
In the present invention, even in the case of osteoporosis with low bone density, the pin is easily joined with the body member of the intramedullary nail within the head of the bone, so that the pin does not easily fall off from the intramedullary nail and the bone head. An intramedullary nail is provided that is a therapeutic instrument for use in proximal proximal humeral fractures.
[0005]
The body member of the intramedullary nail can achieve more stable fixation by bonding the intramedullary nail and the pin by simultaneously pressing and fixing 2 to 6 pins with one fixing screw.
[0006]
Furthermore, even if the pin joined to the body member of the intramedullary nail has a screw shape , naturally, the effect of the invention does not change.
[0007]
Considering the workability of the treatment and sufficient fixation, the number of pins to be joined is suitably 2-6.
[0008]
In addition, since the intramedullary nail is gently curved, the invasion to the bone head can be greatly reduced.
[0009]
As a means for connecting the pin to the intramedullary nail, a male screw is provided in a part of the pin, and a corresponding female screw is provided in the lateral hole for inserting the pin of the intramedullary nail. Connections are of course conceivable, but in this case the pins must be connected individually to the intramedullary nail. If it is this invention, since it is possible to connect a some pin simultaneously, it is excellent in workability | operativity.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
[0011]
Hereinafter, an embodiment of an intramedullary nail according to the present invention will be described. In this embodiment, a case where it is used for a proximal humeral fracture will be described as an example. Although there are various forms of proximal humeral fractures, the simplest fracture model will be described.
[0012]
In a fracture in which the humeral head 1 is unstable with the humeral shaft 2 and the fracture site 3, an intramedullary nail 5 having a curvature of angle b is inserted into the bone marrow cavity 4 at the proximal end of the humerus. .
[0013]
By setting the bending angle b of the intramedullary nail 5 to about 10 ° to 40 °, when the intramedullary nail 5 is inserted into the bone marrow, the insertion position can be near the large nodule 10 with relatively little invasion. It becomes.
[0014]
After the intramedullary nail 5 is inserted, the pin 7 is inserted into the lateral hole 12 which is a through hole provided in the intramedullary nail 5 from the outside of the bone cortex. Further, the inserted pin 7 is joined to the intramedullary nail 5 by pressing and fixing the pin 7 by tightening a fixing screw 8 as a fixing member . By fixing the pin 7, the humeral head 1 is engaged with the intramedullary nail 5.
[0015]
On the other hand, since the humerus shaft 2 is configured to be engaged with the intramedullary nail 5 by the bone screw 9, in such a treatment of the proximal humeral fracture, the fracture site 3 is healed . The fractured part 3 can be stabilized and treated during the period .
[0016]
At this time, since the pin 7 is securely joined to the intramedullary nail 5, there is no possibility that the pin 7 slips out of the bone particularly when the bone density in the head of the bone is low, such as in elderly people.
[0017]
FIG. 2 is a view when the intramedullary nail 5 is viewed from directly above, but the two pins 7 are configured to have an angle a of 10 ° to 90 ° with each other, so that the humerus The head 1 can be engaged more stably.
[0018]
Further, the tips 11 of the two pins 7 have a spherical shape or an obtuse angle, and are shaped so as to remain inside the bone head without penetrating the humeral head 1.
[0019]
Next, the shape of the intramedullary nail 5 will be described with reference to FIGS. 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. Further, on the distal side, a hole 13 and a hole 14 for passing the bone screw 9 are provided.
[0020]
FIG. 4 is a side view of the intramedullary nail 5, and the proximal end 15 has an intramedullary nail proximal end screw portion 16 for guiding the fixing screw 8. Further, the pilot hole 17 of the intramedullary nail proximal end screw portion 16 reaches the through hole 12A and the through hole 12B. The distal end 18 has an angle c of 10 ° to 45 °, so that when the intramedullary nail 5 is inserted into the bone marrow cavity 4, the distal end 18 of the intramedullary nail 5 does not break through the bone cortex. ing.
[0021]
FIG. 5 is a cross section 19 of the intramedullary nail 5 in the YY cross section. The cross section 19 has a shape as shown in the figure in order to increase the rotational fixation and rigidity of the intramedullary nail 5.
[0022]
FIG. 7 shows a structure for fixing the pin 7A and the pin 7B. The pin 7A and the pin 7B inserted into the intramedullary nail 5 are configured to be compressed by the tip indenter 20 of the fixing screw 8.
[0023]
FIG. 6 is a cross-sectional view of the intramedullary nail 5 at the intersection of the pin 7A and the pin 7B when viewed from directly above, and the pin 7A and the pin 7B intersect with each other at an angle a.
[0024]
FIG. 8 is a front sectional view taken along the central axis of the intramedullary nail. The pin 7A and the pin 7B passed through the through hole 12A and the through hole 12B are fixed when the fixing screw 8 is tightened as shown in FIG. The pin 7A presses the lower pin 7B with the tip 20 of the screw, and the pins 7A and 7B can be fixed. The through hole 12A and the through hole 12B are slightly larger in diameter than the outer diameter of the pin, and the through hole 12A can be sufficiently contacted when the pin 7A and the pin 7B are pressed by the tip indenter 20 of the fixing screw. The through-holes 12B are holes having overlapping portions.
[0025]
Next, an embodiment when a large number of pins are used will be described. 9 is a view showing a structure for fixing six pins 22A to F, and the pins 22A to F inserted into the intramedullary nail are configured to be compressed by the fixing screw 8. FIG.
[0026]
FIG. 10 is a front sectional view at the central axis of the intramedullary nail, and the pins 22A to 22F passed through the through holes 23A to 23F are tightened with the fixing screw 8 as shown in FIG. The pin 22A presses the lower pin 22B by the indenter 20, and the pins 22C to 22F are pressed in a chain, thereby fixing the pins 22A to 22F . 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 to 23F are holes having portions where adjacent holes overlap each other.
[0027]
In principle, it is possible to fix a plurality of pins. However, the number of pins considered to be practically suitable is considered to be about 2 to 6 in consideration of the workability of the operator.
[0028]
Even if the shape of the pin is a screw or blade shape, the function of the present invention can be obtained.
FIG. 11 shows a case where the pin has a hollow screw shape. FIG. 12 is a cross-sectional shape of the screw portion in FIG. 11, and a through hole such as a hole 25 is provided.
[0029]
FIG. 13 shows a case where the tip has a screw shape 26.
[0030]
FIG. 14 shows the shape of a pin having a blade shape 27 at the tip, and FIG. 15 shows the cross-sectional shape of FIG.
[Brief description of the drawings]
FIG. 1 is a side view of an embodiment when the product of the present invention is used at a fracture site.
FIG. 2 is a plan view of the product of the present invention shown in FIG. 1 as viewed from directly above.
FIG. 3 shows a front view of an intramedullary nail.
FIG. 4 shows a side view of an intramedullary nail.
FIG. 5 shows a cross-sectional view of the intramedullary nail at YY.
FIG. 6 is a cross-sectional view of the configuration of two pins and an intramedullary nail viewed from directly above.
FIG. 7 is a perspective sectional view showing a configuration of a fixing screw, an intramedullary nail, and two pins in the proximal portion of the intramedullary nail.
FIG. 8 is a front sectional view taken along line ZZ in FIG.
FIG. 9 is a perspective sectional view showing a configuration of a fixing screw, an intramedullary nail, and six pins in the proximal portion of the intramedullary nail.
FIG. 10 is a front sectional view taken along line ZZ in FIG.
FIG. 11 shows the shape of a pin having a hollow thread portion.
FIG. 12 shows a sectional view of a hollow screw part.
FIG. 13 shows a pin with a screw.
FIG. 14 shows a pin having a blade shape.
FIG. 15 is a cross-sectional view of a blade part.
[Explanation of symbols]
1 Humeral bone head 3 Fracture site 4 Bone marrow cavity 5 Intramedullary nail
7, 7A, 7B pin 8 Fixing screw 9 Bone screw
12, 12A, 12B pin insertion intramedullary through hole 16 intramedullary nail the proximal end threaded portion 19 intramedullary nail cross-sectional view of the nail. 22A to 22F pin 23A~ intramedullary through hole 24 hollow screw nail for 23F pin insertion Shape 26 Screw shape 27 Blade shape

Claims (5)

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 plurality of through holes into which a plurality of pins that can be inserted into the bone head across the body member can be inserted into portions corresponding to the bone head of the elongated body member that can be inserted into the bone marrow cavity of the bone , Arranged on the axis of the main body member, these through holes are formed so that adjacent ones overlap each other and have a predetermined angle with each other, and pins are inserted into the respective through holes of the main body member to form through holes In the state where the pins are in contact with each other, all the pins are joined to the main body member at the same time by pressing the pins with a fixing member that can move on the main body member shaft installed at one end of the main body member. Intramedullary nail characterized by things. 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。  The intramedullary nail according to claim 1, wherein the pin joined to the body member has a shape of a screw, a hollow screw or a blade. 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。  The moving means of the fixing member moving on the main body member shaft is performed by an action of a screw provided on the fixing member and the main body member, and the pin is pressed by the tightening force of the screw. The intramedullary nail according to claim 1 or 2. 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。  The intramedullary nail according to any one of claims 1 to 3, wherein tips of a plurality of pins inserted into the main body member have a spherical shape. 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。  5. The flat surface having an angle of 10 ° to 45 ° with respect to the axis of the main body member tip is formed at the front end of the main body member in the bone marrow insertion direction. An intramedullary nail as described in Crab.
JP2001107822A 2001-03-01 2001-03-01 Intramedullary nail Expired - Fee Related JP4418122B2 (en)

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US20050055024A1 (en) 2003-09-08 2005-03-10 James Anthony H. Orthopaedic implant and screw assembly
DE602004006029T2 (en) * 2004-02-23 2008-01-03 Synthes Gmbh MARK NAGEL
ES2306976T3 (en) * 2004-09-27 2008-11-16 Orthofix S.R.L. INTRAMEDULAR SCREW FOR THE TREATMENT OF FEMUR PROXIMAL FRACTURES.
US7918853B2 (en) 2007-03-20 2011-04-05 Smith & Nephew, Inc. Orthopaedic plate and screw assembly
US8449544B2 (en) 2009-06-30 2013-05-28 Smith & Nephew, Inc. Orthopaedic implant and fastener assembly
CN105726112B (en) 2009-06-30 2021-04-27 史密夫和内修有限公司 Orthopaedic implant and fastening assembly
CN102470005B (en) * 2009-07-01 2014-11-05 新特斯有限责任公司 Intramedullary nail and protruding screw locking mechanism
KR101419609B1 (en) 2012-12-18 2014-07-15 고려대학교 산학협력단 Splitted proximal femoral nail device
US12011198B2 (en) 2015-04-24 2024-06-18 Biomet Manufacturing, Llc Humeral nail
KR101909350B1 (en) * 2016-12-29 2018-10-17 인제대학교 산학협력단 Hybrid type bone curing unit

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