JPH0966059A - Intramedullary nail - Google Patents
Intramedullary nailInfo
- Publication number
- JPH0966059A JPH0966059A JP7224188A JP22418895A JPH0966059A JP H0966059 A JPH0966059 A JP H0966059A JP 7224188 A JP7224188 A JP 7224188A JP 22418895 A JP22418895 A JP 22418895A JP H0966059 A JPH0966059 A JP H0966059A
- Authority
- JP
- Japan
- Prior art keywords
- nail
- screw
- bone
- proximal
- femur
- 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.)
- Granted
Links
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000005452 bending Methods 0.000 claims description 3
- 210000000689 upper leg Anatomy 0.000 abstract description 28
- 208000010392 Bone Fractures Diseases 0.000 abstract description 8
- 210000001185 bone marrow Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000004197 pelvis Anatomy 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- 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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、人体の大腿骨近位
部骨折時の治療のための髄内固定法に使用する髄内釘に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intramedullary nail used in an intramedullary fixation method for treating a fracture of a proximal femur of a human body.
【０００２】[0002]
【従来の技術】髄内釘は、途中の屈曲部を境にして近位
部とこの近位部より長い遠位部とを備えたロッド状ネイ
ルと、このネイルの遠位部に設けられる骨部への係合手
段と、ネイルの屈曲部近傍の近位部に斜めに貫設された
貫通孔と、骨頭部にねじ込まれるスクリューが先端に設
けられかつ前記貫通孔に挿入されるラグスクリューとを
有し、髄内固定法に使用されている。そして、ネイルの
近位部はラグスクリューが貫設されるために太く形成さ
れているが、遠位部は大腿骨の内腔への挿入のために内
腔に合わせて細く形成されている。大腿骨近位部骨折時
の治療のためには、まず、ネイルが大腿骨の内腔（骨髄
腔）へ近位部側から打ち込まれる。2. Description of the Related Art An intramedullary nail comprises a rod-shaped nail having a proximal portion and a distal portion longer than the proximal portion with a bending portion in the middle as a boundary, and a bone provided at the distal portion of the nail. Means for engaging the portion, a through hole obliquely provided in the proximal portion in the vicinity of the bent portion of the nail, and a lag screw provided at the tip with a screw screwed into the bone head and inserted into the through hole. And is used for intramedullary fixation. And, the proximal portion of the nail is formed thick because the lag screw is pierced therethrough, while the distal portion is formed thin according to the inner cavity for insertion into the inner cavity of the femur. In order to treat the fracture of the proximal portion of the femur, first, a nail is driven into the inner cavity (bone marrow cavity) of the femur from the proximal side.
【０００３】[0003]
【発明が解決しようとする課題】ところが、大腿骨にド
リルで穿孔してネイルを大腿骨の内腔（骨髄腔）へ打ち
込むときに骨盤が邪魔になるので、内腔に対して近位部
側からやや斜めに打ち込む必要がある。しかし、このネ
イルを打ち込むときに遠位部は細く形成されてはいるも
のの、屈曲部の直ぐ遠位側の凸側が内腔の骨に当たるの
で打ち込みにくく、また、打ち込みによる骨の損傷がな
いように打ち込む必要があるなどの問題がある。However, since the pelvis becomes an obstacle when drilling the femur with a drill and driving the nail into the inner cavity (bone marrow cavity) of the femur, the pelvis is proximal to the inner cavity. It is necessary to drive it at a slight angle. However, when the nail is driven in, the distal part is formed thin, but the convex side immediately distal to the bent part hits the bone in the lumen, so it is hard to drive, and there is no damage to the bone due to driving. There are problems such as the need to drive.
【０００４】本発明はこれに鑑み、打ち込みやすく、し
かも打ち込みによる骨の損傷が生ずることのない髄内釘
を提供することを目的としてなされたものである。In view of this, the present invention has been made with the object of providing an intramedullary nail that is easy to drive and does not cause bone damage due to the drive.
【０００５】[0005]
【課題を解決するための手段】上記従来技術の課題を解
決するため、本発明は、髄内釘のネイルに、ラグスクリ
ューの貫通位置より僅か遠位部側で、かつ、前記屈曲部
の凸側周面に凹入部を形成したことを特徴とするもので
ある。この凹入部により、ネイルの大腿骨内腔への打ち
込み時にネイルの屈曲部の直ぐ遠位側の凸側が内腔の骨
部分と干渉することが避けられる。In order to solve the above-mentioned problems of the prior art, the present invention provides a nail of an intramedullary nail, which is slightly distal to the penetrating position of a lag screw and has a convex portion of the bent portion. It is characterized in that a concave portion is formed on the side peripheral surface. This recess prevents the convex side just distal of the bend of the nail from interfering with the bone portion of the lumen when the nail is driven into the femoral cavity.
【０００６】[0006]
【発明の実施の形態】以下、本発明の髄内釘を図面を参
照して説明する。図１から図６は本発明の第１の実施形
態を示す。図１おいて、髄内釘１は、公知のように、ロ
ッド状のネイル２と、骨との係合手段としてのロッキン
グスクリュー３と、ラグスクリュー（ｌａｇ ｓｃｒｅ
ｗ）４とを有し、図２に示す大腿骨５の近位部骨折の治
療時の髄内固定法に使用される。BEST MODE FOR CARRYING OUT THE INVENTION The intramedullary nail of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of the present invention. In FIG. 1, an intramedullary nail 1 includes a rod-shaped nail 2, a locking screw 3 as a bone engaging means, and a lag screw (lag screw), as is known.
w) 4 and is used in the intramedullary fixation method during the treatment of the proximal fracture of the femur 5 shown in FIG.
【０００７】ネイル２は、図１、図３および図５に示す
ように、途中に小さい角度の屈曲部６を有しており、こ
の屈曲部６に続くー方（図における上方）は近位部７と
され、他方（図における下方）は近位部７より長く、か
つ細い寸法の遠位部８とされている。屈曲部６の一側は
当然のことながら凸側６ａとなる。図５に最もよく示す
ように、ネイル２の近位部７の屈曲部６近傍には、ラグ
スクリュー４のための貫通孔１２が近位部７の軸線に対
して斜めに形成されている。貫通孔１２の傾斜は凸側６
ａで凹側６ｂより高くなる（図で見て）ようにされてい
る。As shown in FIGS. 1, 3 and 5, the nail 2 has a bent portion 6 with a small angle in the middle, and the direction following the bent portion 6 (upward in the drawing) is proximal. The other part (downward in the figure) is a distal part 8 which is longer and thinner than the proximal part 7. Naturally, one side of the bent portion 6 becomes the convex side 6a. As best shown in FIG. 5, a through hole 12 for the lag screw 4 is formed in the vicinity of the bent portion 6 of the proximal portion 7 of the nail 2 obliquely with respect to the axis of the proximal portion 7. The slope of the through hole 12 is the convex side 6
It is designed to be higher than the concave side 6b at a (as seen in the figure).
【０００８】ネイル２のラグスクリュー４用貫通孔１２
より遠位部８側で、かつ、周面の凸側６ａには本発明の
特徴をなす凹入部１３が形成されている。凹入部１３は
滑らかな曲線で凹入するようにえぐれた形状を有してい
る。ネイル２の遠位部８の端部近傍には所定の間隔を形
成して２本のロッキングスクリュー３の貫通ねじ孔１４
が遠位部８の軸線に直交するように形成されており、図
３に示すように、大腿骨５の部分５ａをも貫通してネイ
ル２の遠位部８に貫通させたロッキングスクリュー３に
よってネイル２が大腿骨５の部分５ａに固定されるよう
になっている。Through hole 12 for lag screw 4 of nail 2
A recessed portion 13 that is a feature of the present invention is formed on the more distal portion 8 side and on the convex side 6a of the peripheral surface. The recessed portion 13 has a hollowed shape so as to be recessed with a smooth curve. A predetermined gap is formed in the vicinity of the end of the distal portion 8 of the nail 2 and the through screw holes 14 of the two locking screws 3 are formed.
Is formed so as to be orthogonal to the axis of the distal portion 8, and as shown in FIG. 3, the locking screw 3 penetrates the distal portion 8 of the nail 2 through the portion 5a of the femur 5 as well. The nail 2 is adapted to be fixed to the portion 5a of the femur 5.
【０００９】ラグスクリュー４は先端にスクリュー１６
が形成されており、スクリュー１６がネイル２の近位部
７側となるようにしてネイル２の貫通孔１２に挿通され
るようになっている。ラグスクリュー４の貫通孔１２へ
の挿通の方向は図５に矢印Ａにより示される。The lag screw 4 has a screw 16 at the tip.
Is formed, and the screw 16 is inserted into the through hole 12 of the nail 2 so that the screw 16 is located on the proximal portion 7 side of the nail 2. The direction of insertion of the lag screw 4 into the through hole 12 is shown by an arrow A in FIG.
【００１０】図５に示すように、ネイル２の近位部７の
端部には、貫通孔１２へ挿通されたラグスクリュー４を
ネイル２に固定するためのセットスクリュー９が設けら
れ、このセットスクリュー９の頭部側にはプラグ１０が
設けられている。これをさらに詳しく説明すると、ネイ
ル２の近位部７の端部には、図６に示すように、大きい
径のねじ孔２１が形成され、それに続いて小さい径の段
孔２２、２３が順次形成され、孔１３は前記貫通孔１２
に通じている。孔２２はねじ孔として形成されており、
これに、前記セットスクリュー９をねじ込めるようにな
っている。セットスクリュー９の先端９ａはねじ込みに
よって貫通孔１２内部に達し、貫通孔１２内部に挿通し
たラグスクリュー４の周面の長手方向に形成した溝４ａ
（図５）に係合して、ラグスクリュー４の回転を阻止し
つつそれをネイル２に固定する。かくして、図３に示す
ようにラグスクリュー４はネイル２に固定される。プラ
グ１０は筒状のおねじ部１０ａを有しており、このおね
じ部１０ａを図５に示すように前記ねじ孔２２に螺入す
ると、ネイル２の近位部７の端部はプラグ１０によって
閉じられる。As shown in FIG. 5, a set screw 9 for fixing the lag screw 4 inserted in the through hole 12 to the nail 2 is provided at the end of the proximal portion 7 of the nail 2, and this set is set. A plug 10 is provided on the head side of the screw 9. This will be described in more detail. At the end of the proximal portion 7 of the nail 2, as shown in FIG. 6, a large diameter screw hole 21 is formed, followed by small diameter step holes 22 and 23 in sequence. And the hole 13 is formed in the through hole 12
Leads to. The hole 22 is formed as a screw hole,
The set screw 9 can be screwed into this. The tip 9a of the set screw 9 reaches the inside of the through hole 12 by screwing, and the groove 4a formed in the longitudinal direction of the peripheral surface of the lag screw 4 inserted into the inside of the through hole 12
(Fig. 5) to lock the lag screw 4 to the nail 2 while blocking its rotation. Thus, the lag screw 4 is fixed to the nail 2 as shown in FIG. The plug 10 has a male threaded portion 10a having a tubular shape. When this male threaded portion 10a is screwed into the screw hole 22 as shown in FIG. Closed by.
【００１１】次に、以上に述べた髄内釘１の使用法につ
いて説明する。図４に示すように、大腿骨５は骨頭１９
を有するとともに内腔（骨髄腔）２０を有しており、内
腔２０の骨頭１９寄りの部分に骨頭１９に向かって弧状
にのびる内壁部２０ａを有している。このような大腿骨
５の近位部に起きる骨折は最も典型的には、図４に符号
１８で示すようなものである。このような骨折部１８を
仮固定するために大腿骨５の内腔２０に髄内釘ネイルを
打ち込むのは、前述のように骨盤が邪魔になるので、内
腔に対して近位部側からやや斜めに矢印Ｂ方向に行うこ
とになる。ところが、前述のように、ネイル２は屈曲し
ているので、従来の場合は、その屈曲部６の凸側６ａが
打ち込み時に前記弧状にのびる内壁部２０ａと干渉を起
こす。この問題は本発明によって解決される。Next, a method of using the above-described intramedullary nail 1 will be described. As shown in FIG. 4, the femur 5 has a head 19
And has an inner cavity (bone marrow cavity) 20, and an inner wall portion 20a extending in an arc shape toward the head 19 at a portion near the head 19 of the inner cavity 20. Most typically, such a fracture that occurs in the proximal portion of the femur 5 is as shown at 18 in FIG. Driving an intramedullary nail into the lumen 20 of the femur 5 to temporarily fix the fractured part 18 causes the pelvis to interfere as described above. It will be performed in a slightly oblique direction in the arrow B direction. However, as described above, since the nail 2 is bent, in the conventional case, the convex side 6a of the bent portion 6 interferes with the arcuate inner wall portion 20a at the time of driving. This problem is solved by the present invention.
【００１２】図４の状態にある大腿骨５に対して、まず
矢印Ｂで示す部分にその矢印方向にドリルにより穿孔を
施した後、その穿孔を通して、ネイル２を、その凸側６
ａの凹入部１３が骨頭１９側に向くようにして大腿骨内
腔２０に向かって打ち込み、図３に示す位置まで到達さ
せる。この場合、ネイル２の貫通孔１２の凸側６ａには
凹入部１３が形成されているので、この凹入部１３が、
内腔２０の骨部２０ａへのネイル２の屈曲部の凸側６ａ
の強い干渉を防ぎ、ネイル２はスムースに、かつ、骨部
２０ａに損傷を生ずることなく内腔２０へ打ち込むこと
ができる。凹入部１３の緩やかな曲線のためにこれが可
能となる。With respect to the femur 5 in the state shown in FIG. 4, first, a portion shown by an arrow B is perforated by a drill in the direction of the arrow, and then the nail 2 is passed through the perforation and the convex side 6 thereof.
The recessed portion 13a of "a" is driven toward the femoral inner cavity 20 so that the recessed portion 13 faces the side of the femoral head 19 and reaches the position shown in FIG. In this case, since the concave portion 13 is formed on the convex side 6a of the through hole 12 of the nail 2, the concave portion 13 is
Convex side 6a of bent portion of nail 2 to bone portion 20a of lumen 20
The nail 2 can be driven into the inner cavity 20 smoothly and without damaging the bone portion 20a. This is possible due to the gentle curve of the recess 13.
【００１３】このようにネイル２が所定位置に達したと
ころで、大腿骨５の部分５ａをも貫通してネイル２の遠
位部８にロッキングスクリュー３を通してネイル２を内
腔２０に固定する。次いで、大腿骨５の側壁に穿設した
孔を通してラグスクリュー４をネイル２の貫通孔１２に
挿入し、ラグスクリュー４を図示しない工具により回転
させてスクリュー１６を骨頭１９に螺入して固定する。
その後、ラグスクリュー４の基端部を反スクリュー側へ
引っ張り、骨頭１９側を大腿骨５の本体側に引き寄せて
骨折部１８において密接させる。ついで、ネイル２の近
位部７の端部にセットスクリュー９を図３に示すように
螺入して締め付け、ラグスクリュー４をネイル２に対し
て固定する。次に、図３に示すようにねじ孔２１にプラ
グ１０を螺入する。これによって、図３に示す最終固定
状態が得られる。そして、この状態は骨折部１８が接合
されるまで維持される。髄内釘１は、骨折部１８の完治
後、前述と逆の順序で抜去される。When the nail 2 reaches the predetermined position in this way, the nail 2 is fixed in the inner cavity 20 by passing through the portion 5a of the femur 5 and passing the locking screw 3 to the distal portion 8 of the nail 2. Then, the lag screw 4 is inserted into the through hole 12 of the nail 2 through a hole formed in the side wall of the femur 5, and the lag screw 4 is rotated by a tool (not shown) to screw the screw 16 into the head 19 to fix it. .
After that, the proximal end portion of the lag screw 4 is pulled to the side opposite to the screw side, the bone head 19 side is pulled toward the main body side of the femur 5, and the bone fracture portion 18 is brought into close contact therewith. Next, the set screw 9 is screwed into the end of the proximal portion 7 of the nail 2 as shown in FIG. 3, and is tightened to fix the lag screw 4 to the nail 2. Next, as shown in FIG. 3, the plug 10 is screwed into the screw hole 21. As a result, the final fixed state shown in FIG. 3 is obtained. This state is maintained until the fractured part 18 is joined. The intramedullary nail 1 is removed in the reverse order to the above after the bone 18 is completely healed.
【００１４】図７から図９には本発明の髄内釘の他の実
施形態を示す。この実施形態がさきの実施形態と異なる
点は、骨折部１８より近位部にある骨頭をラグスクリュ
ー４により引き寄せるために、ラグスクリュー４に直接
力を加えなくてもよいようにした点にある。さきの実施
形態と均等な部分については同じ符号を付して説明を省
略し、異なる点のみについて説明する。この実施形態で
は図９に最もよく示されるように、ネイル２の貫通孔１
２に例えば円筒状のスリ−ブ２５を摺動可能に挿通し、
このスリーブ２５の内部にラグスクリュー４を通してい
る。ラグスクリュー４はその基端部に軸方向のねじ孔２
８が形成されており、このねじ孔２８にラグスクリュー
引き寄せ用おねじ２９の先端部が螺入されている。そし
て、おねじ２９の基端部には拡大した頭部２９ａが一体
的に形成されている。そして、通常、この拡大頭部２９
ａはスリーブ２５に基端部の内面に形成した環状の段部
２５ａに接している。図８の状態で拡大頭部２９ａに回
転操作を加えて、おねじ２９を、ラグスクリュー４を引
き寄せる方向に回転させると、ラグスクリュー４がその
方向に移動してくるので骨折部１８を密着させることが
できる。この時の引き寄せ力の反力は拡大頭部２９ａが
スリーブ２５の内面の段部２５ａに当接することによっ
て発生する。7 to 9 show another embodiment of the intramedullary nail of the present invention. This embodiment is different from the previous embodiment in that the lag screw 4 does not need to directly apply a force to the lag screw 4 in order to draw the head of the bone proximal to the fracture 18 from the lag screw 4. . The same parts as those of the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described. In this embodiment, as best seen in FIG. 9, the through hole 1 of the nail 2 is
2, for example, a cylindrical sleeve 25 is slidably inserted,
The lag screw 4 is passed inside the sleeve 25. The lag screw 4 has an axial screw hole 2 at its base end.
8 is formed, and the tip portion of the lag screw pulling male screw 29 is screwed into the screw hole 28. An enlarged head portion 29a is integrally formed at the base end portion of the male screw 29. And normally, this enlarged head 29
a is in contact with an annular step 25a formed on the inner surface of the base end of the sleeve 25. When the enlarged head 29a is rotated in the state shown in FIG. 8 and the male screw 29 is rotated in the direction in which the lag screw 4 is pulled, the lag screw 4 moves in that direction, so that the fractured portion 18 is brought into close contact. be able to. The reaction force of the pulling force at this time is generated when the enlarged head portion 29a comes into contact with the step portion 25a on the inner surface of the sleeve 25.
【００１５】なお、図９において、２６はスリーブ２５
の一端に外側へ向かって突設した複数のストッパで、ス
リーブ２５が図８の状態で大腿骨の側壁より内側に入り
込まないようにするためのものである。また、２７はス
リーブ２５を大腿骨およびネイル２から外すときにフッ
ク等を掛ける小孔である。In FIG. 9, 26 is a sleeve 25.
This is to prevent the sleeve 25 from entering inside the side wall of the femur in the state of FIG. Reference numeral 27 is a small hole through which a hook or the like is hooked when removing the sleeve 25 from the femur and the nail 2.
【００１６】図８の状態を得るには、まずネイル２を大
腿骨内腔２０の内部に打ち込んで位置固定した後、ラグ
スクリュー４を骨頭１９側の骨部分にねじ込み、ついで
スリーブ２５をネイル２の貫通孔１２に通し、ラグスク
リュー引き寄せ用おねじ２９をラグスクリュー４にねじ
込む。スリーブ２５の貫通孔１２内での位置はセットス
クリュー９をねじ込んでその先端をスリーブ２５の周面
に押し付けることによりなされる。この実施形態におい
ても、ネイル２は屈曲部６を有し、その凸側６ａの直ぐ
遠位側に滑らかな曲線からなる凹入部１３が形成されて
いることにより、ネイル２の打ち込み時に、屈曲部６の
凸側６ａと骨の内腔２０の骨部２０ａ（図８）との強い
干渉が避けられる。In order to obtain the state of FIG. 8, first, the nail 2 is driven into the femoral cavity 20 and fixed in position, and then the lag screw 4 is screwed into the bone portion on the side of the head 19 and then the sleeve 25 is fixed to the nail 2. The lag screw pulling male screw 29 is screwed into the lag screw 4 through the through hole 12 of FIG. The position of the sleeve 25 in the through hole 12 is set by screwing the set screw 9 and pressing the tip of the set screw 9 against the peripheral surface of the sleeve 25. Also in this embodiment, since the nail 2 has the bent portion 6 and the concave portion 13 having a smooth curve is formed immediately on the distal side of the convex side 6a, the bent portion 6 is formed when the nail 2 is driven. Strong interference between the convex side 6a of 6 and the bone part 20a (FIG. 8) of the bone lumen 20 is avoided.
【００１７】[0017]
【発明の効果】以上説明したように、本発明による髄内
釘は、そのネイルのラグスクリューの貫通位置より遠位
部側で、かつ、屈曲部の凸側周面に凹入部を形成しこと
によって、大腿骨の内腔へネイルを打ち込むときにネイ
ルの屈曲部近傍の凸側が内腔の骨部と強く干渉すること
を防ぎ、したがって、大腿骨の内腔にネイルを打ち込み
易く手術時間が短縮されるとともに、患者の負担が大幅
に軽減され、しかも、打ち込みによる骨の損傷がないな
どの優れた効果がある。As described above, in the intramedullary nail according to the present invention, the concave portion is formed at the distal side of the penetration position of the lag screw of the nail and on the convex peripheral surface of the bent portion. Prevents the convex side near the bend of the nail from strongly interfering with the bone part of the lumen when driving the nail into the lumen of the femur, thus making it easier to drive the nail into the lumen of the femur and shortening the operation time. In addition, the burden on the patient is greatly reduced, and there is an excellent effect that the bone is not damaged by driving.
【図面の簡単な説明】[Brief description of drawings]
【図１】髄内釘の一実施形態を示す斜視図。FIG. 1 is a perspective view showing an embodiment of an intramedullary nail.
【図２】人体大腿骨部分の略図。FIG. 2 is a schematic view of a human femur portion.
【図３】図１の髄内釘を大腿骨の骨折部に施した状態を
示す一部断面全体図。3 is a partial cross-sectional overall view showing a state in which the intramedullary nail of FIG. 1 is applied to a fractured part of a femur.
【図４】大腿骨の骨折状態を示す説明図。FIG. 4 is an explanatory view showing a fractured state of the femur.
【図５】髄内釘の分解断面図。FIG. 5 is an exploded cross-sectional view of an intramedullary nail.
【図６】髄内釘のネイルの近位部の拡大分解図。FIG. 6 is an enlarged exploded view of the proximal portion of the nail of an intramedullary nail.
【図７】髄内釘の他の実施形態を示す斜視図。FIG. 7 is a perspective view showing another embodiment of the intramedullary nail.
【図８】図７の髄内釘を大腿骨の骨折部に施した状態を
示す一部断面全体図。8 is an overall partial cross-sectional view showing a state in which the intramedullary nail of FIG. 7 is applied to a fractured part of a femur.
【図９】図７の髄内釘の拡大断面部分図。9 is an enlarged sectional partial view of the intramedullary nail of FIG. 7. FIG.
１ 髄内釘 １Ａ 髄内釘 ２ ネイル ３ ロッキングスクリュー ４ ラグスクリュー ５ 大腿骨 ６ 屈曲部 ６ａ 凸側 ６ｂ 凹側 ７ 近位部 ８ 遠位部 ９ セットスクリュー １０ プラグ １２ 貫通孔 １６ スクリュー １８ 骨折部 １９ 骨頭 ２０ 大腿骨の内腔 ２１ ねじ孔 ２２ ねじ孔 ２５ スリーブ ２５ａ 段部 1 Intramedullary nail 1A Intramedullary nail 2 Nail 3 Rocking screw 4 Lag screw 5 Femur 6 Bending part 6a Convex side 6b Concave side 7 Proximal part 8 Distal part 9 Set screw 10 Plug 12 Through hole 16 Screw 18 Fracture part 19 Bone head 20 Lumen of femur 21 Screw hole 22 Screw hole 25 Sleeve 25a Step
Claims (1)
部より長い遠位部とを備えたロッド状ネイル、このネイ
ルの遠位部に設けられる骨への固定手段、前記ネイルの
屈曲部近傍の近位部に斜めに貫設された貫通孔、骨頭部
にねじ込まれるスクリューを先端に有しかつ前記貫通孔
に挿入されるラグスクリュー、およびラグスクリューを
ネイルに固定する手段を有する髄内釘において、前記ネ
イルは、前記ラグスクリューの貫通位置より僅か遠位部
側で、かつ、前記屈曲部の凸側周面に凹入部が形成され
ていることを特徴とする髄内釘。1. A rod-shaped nail provided with a proximal portion and a distal portion longer than the proximal portion with a bending portion in the middle as a boundary, a fixing means to the bone provided at the distal portion of the nail, A through hole obliquely provided in the proximal portion near the bent portion of the nail, a lag screw having a screw screwed into the bone head at the tip and inserted into the through hole, and means for fixing the lag screw to the nail In the intramedullary nail having, the nail is characterized in that a concave portion is formed on the convex side peripheral surface of the bent portion at a position slightly distal to the lag screw penetrating position. nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22418895A JP3307804B2 (en) | 1995-08-31 | 1995-08-31 | Intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22418895A JP3307804B2 (en) | 1995-08-31 | 1995-08-31 | Intramedullary nail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0966059A true JPH0966059A (en) | 1997-03-11 |
| JP3307804B2 JP3307804B2 (en) | 2002-07-24 |
Family
ID=16809907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22418895A Expired - Lifetime JP3307804B2 (en) | 1995-08-31 | 1995-08-31 | Intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3307804B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379360B1 (en) | 1998-03-11 | 2002-04-30 | Synthes (Usa) | Spiral blade insertion instrument |
| US6835197B2 (en) | 2001-10-17 | 2004-12-28 | Christoph Andreas Roth | Bone fixation system |
| JP2009072397A (en) * | 2007-09-21 | 2009-04-09 | Nakashima Propeller Co Ltd | Nail equipment |
| US7892234B2 (en) | 2004-06-22 | 2011-02-22 | Synthes Usa, Llc | Intramedullary nail |
| US8221419B2 (en) | 2003-08-29 | 2012-07-17 | Synthes Usa, Llc | Intramedullary nail |
| US8465489B2 (en) | 2003-06-12 | 2013-06-18 | Synthes Usa, Llc | Surgical nail |
| US8888779B2 (en) | 2003-03-07 | 2014-11-18 | DePuy Synthes Products, LLC | Locking screw for an intramedullary nail |
| US9237909B2 (en) | 2003-07-30 | 2016-01-19 | DePuy Synthes Products, Inc. | Surgical nail |
| US9737347B2 (en) | 2003-06-12 | 2017-08-22 | DePuy Synthes Products, Inc. | Surgical nail |
| CN109394325A (en) * | 2018-10-26 | 2019-03-01 | 大博医疗科技股份有限公司 | A kind of adjustable intramedullary nail and medical embedded fixed system |
| CN113509254A (en) * | 2020-06-02 | 2021-10-19 | 林凤飞 | Interlocking intramedullary nail suite capable of improving mechanical environment |
| CN119214765A (en) * | 2024-12-02 | 2024-12-31 | 天津正天医疗器械有限公司 | Angle-adjustable femoral intramedullary nail |
-
1995
- 1995-08-31 JP JP22418895A patent/JP3307804B2/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379360B1 (en) | 1998-03-11 | 2002-04-30 | Synthes (Usa) | Spiral blade insertion instrument |
| US6835197B2 (en) | 2001-10-17 | 2004-12-28 | Christoph Andreas Roth | Bone fixation system |
| US7182765B2 (en) | 2001-10-17 | 2007-02-27 | Synthes (Usa) | Bone fixation system |
| US7306600B2 (en) | 2001-10-17 | 2007-12-11 | Synthes (U.S.A.) | Bone fixation system |
| US10271881B2 (en) | 2001-10-17 | 2019-04-30 | DePuy Synthes Products, Inc. | Bone fixation system |
| US9918757B2 (en) | 2001-10-17 | 2018-03-20 | DePuy Synthes Products, Inc. | Bone fixation system |
| US8888779B2 (en) | 2003-03-07 | 2014-11-18 | DePuy Synthes Products, LLC | Locking screw for an intramedullary nail |
| US8465489B2 (en) | 2003-06-12 | 2013-06-18 | Synthes Usa, Llc | Surgical nail |
| US9737347B2 (en) | 2003-06-12 | 2017-08-22 | DePuy Synthes Products, Inc. | Surgical nail |
| US9237909B2 (en) | 2003-07-30 | 2016-01-19 | DePuy Synthes Products, Inc. | Surgical nail |
| US8221419B2 (en) | 2003-08-29 | 2012-07-17 | Synthes Usa, Llc | Intramedullary nail |
| US9814500B2 (en) | 2003-08-29 | 2017-11-14 | DePuy Synthes Products, Inc. | Intramedullary nail |
| US7892234B2 (en) | 2004-06-22 | 2011-02-22 | Synthes Usa, Llc | Intramedullary nail |
| JP2009072397A (en) * | 2007-09-21 | 2009-04-09 | Nakashima Propeller Co Ltd | Nail equipment |
| CN109394325A (en) * | 2018-10-26 | 2019-03-01 | 大博医疗科技股份有限公司 | A kind of adjustable intramedullary nail and medical embedded fixed system |
| CN113509254A (en) * | 2020-06-02 | 2021-10-19 | 林凤飞 | Interlocking intramedullary nail suite capable of improving mechanical environment |
| CN113509254B (en) * | 2020-06-02 | 2022-06-21 | 林凤飞 | Interlocking intramedullary nail suite capable of improving mechanical environment |
| CN119214765A (en) * | 2024-12-02 | 2024-12-31 | 天津正天医疗器械有限公司 | Angle-adjustable femoral intramedullary nail |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3307804B2 (en) | 2002-07-24 |
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