JP2553323B2 - 髄内釘を固定するためのねじ - Google Patents
髄内釘を固定するためのねじInfo
- Publication number
- JP2553323B2 JP2553323B2 JP6519451A JP51945194A JP2553323B2 JP 2553323 B2 JP2553323 B2 JP 2553323B2 JP 6519451 A JP6519451 A JP 6519451A JP 51945194 A JP51945194 A JP 51945194A JP 2553323 B2 JP2553323 B2 JP 2553323B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- thread
- screw head
- head
- shank
- 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.)
- Expired - Lifetime
Links
- 230000007423 decrease Effects 0.000 claims 1
- 210000000988 bone and bone Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0084—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a threaded engagement between the head of the bolt or screw and the tool
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/863—Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8875—Screwdrivers, spanners or wrenches
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S606/00—Surgery
- Y10S606/916—Tool for installing or removing orthopedic fastener
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Neurology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
- Connection Of Plates (AREA)
- Dowels (AREA)
- Clamps And Clips (AREA)
- Joining Of Building Structures In Genera (AREA)
- Adornments (AREA)
- Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
Description
する、髄内釘を固定するためのねじに関する。
開第306709号明細書により公知である。この場合に、組
み込まれるねじは、その軸長全体にわたって雄ねじを備
えており、それによって髄内釘を横断する。
許第4463753号明細書により公知であり、この場合に
は、このねじの二つのねじ山領域が、骨折によって分離
された両方の骨部を互いの方へ引き寄せる圧迫ねじを構
成するために用いられる。その際、互いに離れている両
方のねじ山領域のねじ山の向きは同一であり、そしてこ
のねじは髄内釘と結合するのには用いられない。
じを、非常に簡単な方法で髄内釘を固定しかつ容易に除
去できるように構成することを課題とする。
の一部分にのみ設けられ、 b)ねじ頭部が中空のねじ頭部あるいは十字溝ねじ頭部
として形成され、 c)ねじ頭部がその外側に雄ねじを有し、当該雄ねじの
ねじ山の向きがねじ軸部ねじ山のねじ山の向きと反対で
ある ことによって解決される。
ち、ねじ軸部の一部分にのみ雄ねじを備えているねじで
あり、その際ねじ山のない領域が髄内釘を横断し、これ
に対しねじ山を備える領域が当該ねじを骨の皮質に固定
する。
されるか、あるいは十字溝を備え、それによって対応す
るドライバーをはめ込むことにより、ねじを骨にねじ込
むこと、及びねじ軸部のねじ山のない部分を髄内釘に挿
入することが可能となる。
設けられており、その雄ねじのねじ山の向きがねじ軸部
のねじ山のねじ山の向きと反対である。このことによっ
て、ねじを抜くために、ねじ頭部の外側に、雌ねじを備
えるスパナをあてがうことが可能であり、ねじをねじ込
む場合に及ぼされる回転と逆の方向の当該スパナの回転
によって、ねじを骨から抜くことができる。
よっても達成することができるが、そのような中空の六
角ソケットねじドライバーの場合、ねじに引張力を及ぼ
すことができず、その結果定着したねじを骨から除去す
ることはほとんど不可能である。
なく、いくらかずらされている。その結果、雌ねじを備
えるドライバーをあてがうことを容易にする同筒形の突
出部が、ねじ頭部の領域に生じる。
の大きさ及びねじの使用目的に応じて調整される自由空
間がある。
が図示されている。ねじ軸部3の大部分の領域がねじ山
なしに形成されており、ねじ頭部2の下側の近くにの
み、ねじ軸部ねじ山4が設けられている。髄内釘を固定
するためにねじ1を使用する場合、このねじ軸部ねじ山
4が骨の皮質内へねじ込まれる。
れているが、十字溝を備えることも可能である。それに
よって、対応するドライバー9を用いてねじをねじ込む
ことが可能である。
り、そのねじ山の向きはねじ軸部ねじ山4のねじ山の向
きと反対になっている。その結果、対応する雌ねじを備
えるドライバー10を回してねじ頭部2の肩部11に当接し
た後に、ねじ1を患者の骨からゆるめる方向に回すこと
が可能である。その際、同時に相応の引く力をねじ1に
及ぼすことが可能となるので、ねじ1を骨から容易に抜
くことができる。
ねじ頭部2の上側との間には、ねじ頭部が患者の内部に
あって目で見ることができない場合でも、ねじ頭部ねじ
山5へのドライバー10の容易なはめ込みを可能にするね
じ山のない円筒形の領域7が設けられている。
じ1の大きさ及び使用目的に応じて調整されるねじ山の
ない領域6がある。
Claims (4)
- 【請求項1】ねじ頭部(2)と雄ねじ(4)を備えるね
じ軸部(3)とを有する、髄内釘を固定するためのねじ
(1)において、 a)ねじ軸部ねじ山(4)がねじ頭部(2)の近くでね
じ軸部(3)の長さの一部分にのみ設けられ、 b)ねじ頭部(2)が中空のねじ頭部あるいは十字溝ね
じ頭部として形成され、 c)ねじ頭部(2)がその外側に雄ねじ(5)を有し、
当該雄ねじ(5)のねじ山の向きがねじ軸部ねじ山
(4)のねじ山の向きと反対である ことを特徴とするねじ。 - 【請求項2】ねじ頭部ねじ山(5)がねじ頭部(2)の
自由端から間隔をおいたところから始まり、かつ、ねじ
頭部(2)の外径がここではほぼねじ頭部ねじ山(5)
の内径に相当することを特徴とする、請求項1に記載の
ねじ。 - 【請求項3】ねじ軸部ねじ山(4)とねじ頭部(2)の
下側との間に、ねじ山のない領域(6)が設けられてい
ることを特徴とする、請求項1または2に記載のねじ。 - 【請求項4】ねじ軸部ねじ山(4)のねじ山の深さが、
ねじ山のないねじ軸部(3)の方へ向かって減少するこ
とを特徴とする、請求項1ないし3の1つに記載のね
じ。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4307633.5 | 1993-03-11 | ||
DE4307633A DE4307633C1 (de) | 1993-03-11 | 1993-03-11 | Schraube zum Festlegen eines Markraumnagels |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07505567A JPH07505567A (ja) | 1995-06-22 |
JP2553323B2 true JP2553323B2 (ja) | 1996-11-13 |
Family
ID=6482466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6519451A Expired - Lifetime JP2553323B2 (ja) | 1993-03-11 | 1994-03-01 | 髄内釘を固定するためのねじ |
Country Status (15)
Country | Link |
---|---|
US (1) | US5375956A (ja) |
EP (1) | EP0639955B1 (ja) |
JP (1) | JP2553323B2 (ja) |
KR (1) | KR0167627B1 (ja) |
CN (1) | CN1042793C (ja) |
AT (1) | ATE137949T1 (ja) |
AU (1) | AU668657B2 (ja) |
CA (1) | CA2116918C (ja) |
DE (2) | DE4307633C1 (ja) |
ES (1) | ES2088319T3 (ja) |
NO (1) | NO179535C (ja) |
TR (1) | TR27714A (ja) |
TW (1) | TW288969B (ja) |
WO (1) | WO1994020039A1 (ja) |
ZA (1) | ZA941669B (ja) |
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-
1993
- 1993-03-11 DE DE4307633A patent/DE4307633C1/de not_active Expired - Fee Related
- 1993-12-21 US US08/171,274 patent/US5375956A/en not_active Expired - Lifetime
-
1994
- 1994-02-25 TW TW083101625A patent/TW288969B/zh not_active IP Right Cessation
- 1994-03-01 ES ES94908948T patent/ES2088319T3/es not_active Expired - Lifetime
- 1994-03-01 JP JP6519451A patent/JP2553323B2/ja not_active Expired - Lifetime
- 1994-03-01 AU AU73460/94A patent/AU668657B2/en not_active Ceased
- 1994-03-01 WO PCT/DE1994/000228 patent/WO1994020039A1/de active IP Right Grant
- 1994-03-01 CN CN94190040A patent/CN1042793C/zh not_active Expired - Lifetime
- 1994-03-01 EP EP94908948A patent/EP0639955B1/de not_active Expired - Lifetime
- 1994-03-01 AT AT94908948T patent/ATE137949T1/de active
- 1994-03-01 DE DE59400279T patent/DE59400279D1/de not_active Expired - Lifetime
- 1994-03-01 KR KR1019940704004A patent/KR0167627B1/ko not_active IP Right Cessation
- 1994-03-03 CA CA002116918A patent/CA2116918C/en not_active Expired - Lifetime
- 1994-03-09 TR TR00273/94A patent/TR27714A/xx unknown
- 1994-03-10 ZA ZA941669A patent/ZA941669B/xx unknown
- 1994-09-07 NO NO943306A patent/NO179535C/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0167627B1 (ko) | 1999-01-15 |
DE59400279D1 (de) | 1996-06-20 |
US5375956A (en) | 1994-12-27 |
ATE137949T1 (de) | 1996-06-15 |
CN1102037A (zh) | 1995-04-26 |
EP0639955A1 (de) | 1995-03-01 |
AU668657B2 (en) | 1996-05-09 |
DE4307633C1 (de) | 1994-05-19 |
CA2116918A1 (en) | 1994-09-12 |
NO179535C (no) | 1996-10-23 |
CA2116918C (en) | 2004-02-17 |
KR950701504A (ko) | 1995-04-28 |
AU7346094A (en) | 1994-09-26 |
NO943306D0 (no) | 1994-09-07 |
ZA941669B (en) | 1994-10-12 |
TR27714A (tr) | 1995-06-22 |
ES2088319T3 (es) | 1996-08-01 |
NO179535B (no) | 1996-07-15 |
WO1994020039A1 (de) | 1994-09-15 |
NO943306L (no) | 1994-09-15 |
JPH07505567A (ja) | 1995-06-22 |
EP0639955B1 (de) | 1996-05-15 |
CN1042793C (zh) | 1999-04-07 |
TW288969B (ja) | 1996-10-21 |
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