CN1669539A - Artificial atlas-dens half joint - Google Patents
Artificial atlas-dens half joint Download PDFInfo
- Publication number
- CN1669539A CN1669539A CNA2004100087868A CN200410008786A CN1669539A CN 1669539 A CN1669539 A CN 1669539A CN A2004100087868 A CNA2004100087868 A CN A2004100087868A CN 200410008786 A CN200410008786 A CN 200410008786A CN 1669539 A CN1669539 A CN 1669539A
- Authority
- CN
- China
- Prior art keywords
- joint
- steel plate
- hook
- atlantodental
- conjuncted
- 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.)
- Pending
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Classifications
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- 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
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
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- 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
Abstract
The invention is a kind of manual atlantodental half joint, which is used to reconstruct the atlantodental joint stableness and the movable function of the instability patients. It is adapted for the reset of theatlanto-axial instability caused by atlas transverse ligament disease decrease and the reconstruction of the atlantodental joint function. It mainly comprises a conjuncted steel sheet with a semi-circular hook and two side screws. The characteristic is the steel sheet can reconstruct the atlas transverse ligament and the atlantodental joint function. Wherein, the hook is high polished to diminish the abrasion to the odontoid process of vertebra dentate. Both the part of the conjuncted steel sheet, which is contacted with the bone surface and the screws, contain hydroxyapatite layer, to provide the internal fixation basis for long and stablely. The invention not only can stabilize the joint, but also can reconstruct the functions such as anteflexion, extension, side bend and rotation of atlanto-axial joint, restore the physiological activity of backbone. It fits to the biomechanical demand, and has the effects of delaying the disintegration of pathology facet joint and the adjacent facet joint.
Description
The present invention is a kind of artificial extensive region tooth semiarthrosis that is used to rebuild atlantoaxial joint instability patient's atlanto-odontoid joint stability.
At present, the clinical common method that is used to rebuild extensive region dentata stability is that the extensive region dentata resets, internal fixation, bone-graft fusion.Its advantage is the fixedly vertebra joint of unstability that can reset effectively, removes clinical symptoms at once.Its shortcoming is that the spinal fusion sections loses movable function, and the stress that its adjacent segment bore increases, thereby quickens the regression of adjacent vertebra joint, causes new rachiopathy and decreases and clinical symptoms.Because articulatio atlantoepistrophica is the joint of incidence range of activity maximum, account for half of 7 joint cervical vertebra total activity scopes.So extensive region dentata fusion is very outstanding to the incidence moving obstacle performance that patient brings.
The objective of the invention is to repair the Atlantoaxial stability of unstability effectively, can keep the artificial extensive region tooth semiarthrosis of extensive region dentata sections movable function again in order to provide a kind of simple in structure, workable to the orthopedist.
The present invention has adopted conjuncted steel plate and 2 pieces of lateral mass screws with half garden hook-type.See accompanying drawing and description of drawings for details.To be used for the artificial extensive region tooth semiarthrosis replacement that human body transverse ligament of atlas fracture causes atlantoaxial joint instability be that example illustrates making of the present invention, operation principle and using method with a kind of below.
The building block of the artificial extensive region tooth semiarthrosis of this specification is as follows: (1) is with the conjuncted steel plate of half garden hook-type: select for use medical titanium alloy to make a conjuncted steel plate with half garden hook-type, the long 10mm of steel plate, wide 12mm, thick 1.5mm, the outer Shang Jiao of steel plate and interior leftover bits and pieces are respectively opened the screw hole of a diameter 3.5mm, steel plate and bone contact surface spraying hydroxyapatite coating; Hook becomes 110 ° of angles with the steel plate plane, is positioned on one jiao of the steel plate, and the long 8mm of the neck of hook, hook inner radius 6.5mm, the thickness 2mm of hook, the hook end is widened gradually to the width at the steel plate junction surface of the neck of hook, hook end 2.5mm, the steel plate junction surface 7mm of the neck of hook; The arc surface of evagination is made on the inside and outside two sides of hook, and high polish.(2) lateral mass screw: 2 of the same form, long 18mm, its leading portion diameter 3mm makes the cancellous bone screw style, pitch of thread 1mm, degree of depth 0.3mm, back segment diameter 3.5mm, the threaded portion spraying hydroxyapatite coating of screw; Head of screw thickness 2.5mm, diameter 5mm, the common soket head cap screw that make with the S3mm specification termination revolves the hole that tool adapts.
The present invention has the advantages that to rebuild extensive region dentata stability and keep joint movement function.Its operation principle is as follows: (1) has steel plate and the screw that hydroxyapatite coating layer is handled by use, grows in order to bone, and permanent strong internal fixation basis is provided.(2) the part high polish of half garden shape hook of conjuncted steel plate reduces its wearing and tearing to dentoid process of axis.(3) stablize Atlantoaxial function by alternative transverse ligament of atlas and the alar ligaments that ruptures of half garden shape hook of conjuncted steel plate, can limit atlas moves in the horizontal direction, stablize the vertebra joint, can rebuild again spinal column anteflexion, after stretch, function such as lateroflexion and rotation, recover the physiological activity of cervical vertebra, more meet the biomechanics requirement, reach and delay or prevent that pathological changes vertebra joint and adjacent vertebra thereof from saving the purpose of further regression.
During use, at first under skull traction, the extensive region dentata is resetted,, appear anterior arch of atlas, the prominent basilar part of tooth and left side lateral mass of atlas through the oral cavity approach by prior art.With Electric grinding drill lateral mass the place ahead cortical bone is polished.The radian that half garden shape hook of conjuncted steel plate is dashed forward along tooth is close to its cortical bone again, inserts its rear from the prominent basilar part of tooth left side, and steel plate is close to lateral mass of atlas the place ahead, left side, at last two pieces of screws is inserted lateral mass, fixation steel plate.Needn't bone-graft fusion, keep the movable function of vertebra joint.Then, sew up the incision, art finishes.
Description of drawings:
Fig. 1 installation diagram of the present invention
The conjuncted steel plate side view of Fig. 2 band half garden hook-type
The conjuncted steel plate upward view of Fig. 3 band half garden hook-type
The conjuncted steel plate front view of Fig. 4 band half garden hook-type
Fig. 5 screw
Among the figure 1. with hook portion 2. screws 3. of the conjuncted steel plate of half garden hook-type with the screw hole 5. of steel plate part 4. steel plates of the conjuncted steel plate of half garden hook-type with the cross-sectional view 6. of the hook portion of the conjuncted steel plate of half garden hook-type cross-sectional view with the steel plate part of the conjuncted steel plate of half garden hook-type
In Fig. 1, screw 2 is screwed into the atlas bone by the screw hole 4 with the conjuncted steel plate 3 of half garden hook-type, this steel plate 3 is fixed as one with screw 2.
The present invention also can be used for the human body transverse ligament of atlas damage due to a variety of causes except that being applicable to the present embodiment patient, the resetting and the atlanto-odontoid joint functional rehabilitation of extensive region pivot unstability disease.The size of its screw and steel plate can be decided according to patient's skeleton size, makes the artificial extensive region pivot semiarthrosis prosthese of various different sizes.
The present invention has following advantage compared with prior art:
1 parts are few, and manufacture technology is simple.
2 is simple in structure, easy to operate, only needs tightening nuts, both can finish unstability extensive region pivot The reconstruction in joint.
3 prior aries can only be fixed and be merged the extensive region dentata, and are very big to human body neck Activity Effects. The present invention can repair the stability of unstability backbone effectively, can merge joint by preservation spinal again The movable function of section.
Claims (3)
1. an artificial extensive region tooth semiarthrosis that is used to rebuild atlantoaxial joint instability patient's atlanto-odontoid joint stability is characterized in that: the conjuncted steel plate with half garden hook-type.
2. a conjuncted steel plate as claimed in claim 1 with half garden hook-type.It is characterized in that: the part high polish of half garden shape hook of this conjuncted steel plate.
3. a conjuncted steel plate with half garden hook-type as claimed in claim 1 is characterized in that: the steel plate part and the screw of this conjuncted steel plate have hydroxyapatite coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100087868A CN1669539A (en) | 2004-03-19 | 2004-03-19 | Artificial atlas-dens half joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100087868A CN1669539A (en) | 2004-03-19 | 2004-03-19 | Artificial atlas-dens half joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1669539A true CN1669539A (en) | 2005-09-21 |
Family
ID=35041121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100087868A Pending CN1669539A (en) | 2004-03-19 | 2004-03-19 | Artificial atlas-dens half joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1669539A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889896A (en) * | 2010-07-05 | 2010-11-24 | 苏州市百得医疗器械有限公司 | Hydroxyapatite bone screw |
| US10485673B2 (en) | 2014-04-07 | 2019-11-26 | Pravin Salunke | Artificial implant for atlas-axis (C1-2) lateral joints and method of use thereof |
-
2004
- 2004-03-19 CN CNA2004100087868A patent/CN1669539A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889896A (en) * | 2010-07-05 | 2010-11-24 | 苏州市百得医疗器械有限公司 | Hydroxyapatite bone screw |
| US10485673B2 (en) | 2014-04-07 | 2019-11-26 | Pravin Salunke | Artificial implant for atlas-axis (C1-2) lateral joints and method of use thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |