CN202096313U - Artificial atlanto-odontoid joint - Google Patents
Artificial atlanto-odontoid joint Download PDFInfo
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- CN202096313U CN202096313U CN2011201263932U CN201120126393U CN202096313U CN 202096313 U CN202096313 U CN 202096313U CN 2011201263932 U CN2011201263932 U CN 2011201263932U CN 201120126393 U CN201120126393 U CN 201120126393U CN 202096313 U CN202096313 U CN 202096313U
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- screw hole
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- screw
- odontoid
- dentata
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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
- A61F2/4405—Joints for the spine, e.g. vertebrae, spinal discs for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes
-
- 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
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
-
- 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
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
- A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
-
- 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
- A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
- A61F2002/30649—Ball-and-socket joints
-
- 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
- A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
- A61F2002/30649—Ball-and-socket joints
- A61F2002/3065—Details of the ball-shaped head
-
- 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
- A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
- A61F2002/30649—Ball-and-socket joints
- A61F2002/30654—Details of the concave socket
-
- 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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30784—Plurality of holes
- A61F2002/30787—Plurality of holes inclined obliquely with respect to each other
Abstract
The utility model discloses an artificial atlanto-odontoid joint including an atlas component, an axis component, a joint component and screws, wherein the atlas component comprises a symmetrical arched fixing plate, of which both ends are symmetrically provided with first screw holes, and a rotary sleeve at the rear end, and the axis component comprises a fixing plate and a base on the upper portion. Two pairs of arms are symmetrically extended from the left lower and right lower sides of the fixing plate, and second and third screw holes are arranged on both ends of the arms. A hemispherical articular fossa is arranged above the base. The joint component comprises a rotary shaft and a spherical joint head on the lower portion, wherein the rotary shaft is jointed with the rotary sleeve of the atlas component, and the spherical joint head is jointed with the articular fossa arranged on the base of the axis component. The articular fossa encloses two third of the joint head to prevent dislocation of the joint head during motion. The screws are respectively arranged in the first, second and third screw holes. On the premise of stability, the artificial atlanto-odontoid joint maintains motion function of an atlantoaxial joint at a maximal degree and provides more effective and reliable connection.
Description
Technical field
This utility model belongs to medical prosthesis manufacturing technology field, especially a kind of artificial atlanto-odontoid joint.
Background technology
The articulatio atlantoepistrophica of human body comprises 3 independently joints, two lateral atlantoaxial joints that promptly are made up of atlas inferior articular process and superior articular process of axis; And, claim atlanto-odontoid joint again by the median atlantoaxial joint that constitutes between the posterior articular facet of dens axis and anterior arch of atlas back and the transverse ligament of atlas.Lateral atlantoaxial joint is plane, and atlanto-odontoid joint is the axletree shape, and both cooperate can make head rotate around tooth is prominent together with atlas, allows a spot of bending and stretching and side Qu Yundong simultaneously.
At present; Extensive region dentata shakiness that a variety of causes causes and neck epimere compression of spinal cord all need be performed the operation to remove nerve compression, and preceding road Odontoid process excision decompression is comparatively ideal modus operandi, but because this operation has destroyed the atlanto-odontoid joint structure; Can cause or increase the weight of the cervical vertebra shakiness; Therefore must go fusion again to eliminate shakiness, the Therapeutic Method that this decompression adds fusion is considered to the treatment technology of standard always, yet many problems and defective in secular practice process, have also occurred.The result who for example merges is when acquisition is stable; Sacrificed the topmost spinfunction of articulatio atlantoepistrophica; It is obviously limited to cause the activity of patient's postoperative incidence particularly to rotatablely move, and the cervical vertebra after merging is because the forfeiture of motion and spring function will produce secular negative effect to the physiology and the biomechanics characteristic of cervical vertebra.In addition, the problem of paying close attention to the most is to close on the complication such as cervical vertebra regression gradually, unstability and pain that stress conducts and stress concentration is caused that do not merge sections after merging, and the problems such as second operation that cause thus.
Therefore, how on the basis of fully decompression, keep the stability of pillow extensive region pivot complex, and to keep its motor function to greatest extent will be the trend of this position internal fixation technical development from now on.To this problem, the cervical vertebra surgeon begins to seek to keep that part or all of active spinal column non-fusion technology replaces traditional integration technology between atlas in recent years.
Some scholars have designed artificial atlanto-odontoid joint, and expectation reaches with this has not only stablized articulatio atlantoepistrophica but also keep the purpose that it rotatablely moves.(JISUI ZAZHI AUTHOR AND such as Tan Mingsheng; 2004 the 14th volume the 10th phase 601-604) patient to the transverse ligament of atlas fracture has designed a kind of artificial extensive region tooth semiarthrosis; Under the complete prerequisite of Odontoid process; Rebuild articulatio atlantodentalis dorsalis through the ankyrism face, can prevent atlas, kept the rotary moveable between the dentata of extensive region again to anterior dislocation.The implantation prerequisite of this prosthese is that Odontoid process must be complete, so this method has bigger limitation.The artificial atlanto-odontoid joint of Hu Yong etc. (JISUI ZAZHI AUTHOR AND, 2007 the 17th volume the 2nd phase 133-136) design also is made up of atlas parts and dentata parts, and both are through loop overlapping shape structurally associated joint.The groove that must on the dentata vertebral body, open seam before implanting has destroyed the bone property structure of dentata, has reduced stability, and the operation technique complicacy, has increased wound and amount of bleeding, and these have all limited its further applied research.We are according to the anatomic measurement data of normal adult, and Bionic Design has gone out artificial atlas Odontoid process joint (Bin Lu, Xijing He; Chenguang Zhao, Haopeng Li, DongWang.Biomechanical Study of Artificial Atlanto-Odontoid Joint.Spine.2009.Volume 34.Number 18; Pp1893-1899), it comprises the atlas parts, dentata parts and screw; The atlas parts are made up of symmetric arc fixed plate and rotation oversleeve; The fixing head two ends are provided with screw hole, and the dentata parts are made up of rotating shaft and fixing head, also are provided with two screw holes on its fixing head.Through anatomy experiment and biomechanics test, this prosthese has places remarkable advantages such as stable, easy and simple to handle.But; Change prosthese and only kept the spinfunction between the dentata of extensive region; Can't carry out lateroflexion and flexion and extension, not meet normal human's characteristics of motion, hold-down screw is the vertebral body cancellous bone screw simultaneously; Its nail road shorter hold a little less than, these shortcomings all can cause this prosthese to place the back for a long time at human body loosening and even fixing failure takes place.
In sum, in present stage, still there is not the report that successfully design meets the artificial atlanto-odontoid joint of human body physiological function fully and obtains satisfied experimental result both at home and abroad.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art; A kind of artificial atlanto-odontoid joint is provided; This artificial atlanto-odontoid joint can carry out bionical to normal human's atlanto-odontoid joint from morphology and mechanics two aspects; Make it both to have guaranteed motion normally between the dentata of extensive region, have the reliable fixation effect again, reduce the possibility that prosthetic loosening takes place.
The purpose of this utility model solves through following technical scheme:
This artificial atlanto-odontoid joint; Comprise atlas parts, dentata parts, joint component and screw; Said atlas parts are made up of symmetric arc fixed plate and the rotation oversleeve that is fixed on the said arc fixed plate axis of symmetry, and the two ends of arc fixed plate are arranged with first screw hole respectively; Said dentata parts are made up of fixing head and the base that is connected in the fixing head top, and fixing head descends left respectively and the lower right symmetry is stretched out two pairs of arms, and its two ends are respectively equipped with second screw hole and the 3rd screw hole; Said base is a short cylindrical shape, and a hemispheric glenoid fossa is arranged above base; Said joint component is made up of columniform rotating shaft and the spherical joint head that is positioned at the rotating shaft below; The rotation oversleeve associated section of said rotating shaft and atlas parts, the glenoid fossa associated section on spherical joint head and the dentata parts base.
Above-mentioned glenoid fossa holds ball and socket joint 2/3rds and deviates from the volley to prevent the joint; Said screw is located at respectively in first screw hole, second screw hole and the 3rd screw hole.
Above-mentioned arc fixed plate has downward 42 ° and 27 ° radian backward, thickness of slab 1.6mm, high 6.0mm.
The cross section external diameter of above-mentioned rotation oversleeve is 10.0mm, and internal diameter is 6.0mm, high 6.0mm.
The both sides first screw hole bore dia 3.5mm of above-mentioned arc fixed plate, distance is 32.0mm between the screw hole center of circle.
The fixing head thickness of slab 1.6mm of above-mentioned dentata parts, two pairs of arms that this fixing head stretches out to lateral symmetry, wherein the angle between a pair of arm in top is 140 °; Angle between a pair of arm in below is 60 °, and the end of two pairs of arms respectively is arranged with two screw holes, is followed successively by second screw hole and the 3rd screw hole from top to bottom; Second screw hole is the pedicle screw hole; Ellipse, the distance between its central point are 14.0mm, and the 3rd screw hole is a dentata vertebral body screw hole; Diameter 3.5mm, distance is 8.0mm between the center of circle; The high 5.0mm of said base, diameter are 10.0mm, and base top glenoid fossa diameter is 6.0mm, glenoid fossa distance from bottom base bottom 1.4mm.
The high 6.0mm of the rotating shaft of above-mentioned joint component, diameter 6.0mm; Said ball and socket joint is spherical, and diameter is 6.0mm.
The corresponding screw of above-mentioned first screw hole and the 3rd screw hole is the spongy bone tapping screw, diameter 3.5mm, long 13～22mm; The corresponding screw of said second screw hole is a pedicle screw, diameter 3.5mm, long 24～30mm.
The above-mentioned first screw hole entry point is positioned at the lateral mass of atlas mid point, and screw and sagittal plane are outside 10 ° of angles; The 3rd screw hole entry point is positioned at dentata vertebral body and lateral mass line mid point; Screw and sagittal plane are inside 10 ° of angles; The second screw hole entry point is 5mm and the other 6mm of a preceding median sagittal plane intersection under the superior articular surface, and screw and sagittal plane are outside 25 ° of angles, horizontal by downward 25 ° of angles.
Above-mentioned artificial atlanto-odontoid joint is characterized in that, said atlas parts, dentata parts, joint component and screw all adopt the medical titanium alloy material.
This utility model compared with prior art possesses following beneficial effect:
The artificial atlanto-odontoid joint prosthese of this utility model has carried out bionical to normal human's atlanto-odontoid joint on morphology and mechanics; Only keeping spinfunction with prior art compares; This prosthese has adopted axletree and the dual joint of ball-and-socket, can keep the motion of extensive region dentata on all directions, meets human body physiological state more; Reduced the stress of screw in the motor process, reduced prosthese loosening possibility takes place; The atlas parts adopt downwards and radian backward makes the atlas parts meet the normal anterior arch of atlas form of human body more; This utility model adopts pedicle screw and vertebral body screw double fixed dentata parts simultaneously, and its advantage is significantly to increase the constant intensity of prosthese.Therefore, this utility model has kept Atlantoaxial motor function to greatest extent under stable prerequisite, and provides more reliable and effective fixing.
Description of drawings
Fig. 1 is the atlas modular construction rearview of this utility model;
Fig. 2 is the atlas modular construction vertical view of this utility model;
Fig. 3 is the joint component structural representation of this utility model;
Fig. 4 is the dentata modular construction sketch map of this utility model;
Fig. 5 is the dentata modular construction cut away view of this utility model;
Fig. 6 is a sketch map behind atlas parts, joint component and the dentata unit construction of this utility model;
Fig. 7 A is this utility model scheme of installation;
Fig. 7 B is that this utility model atlas parts screw advances to follow closely sketch map;
Fig. 7 C is that this utility model dentata parts vertebral body screw advances to follow closely sketch map;
Fig. 7 D, 7E are that this utility model dentata parts pedicle screw advances to follow closely sketch map;
Wherein, 1 is arc fixed plate; 2 are the rotation oversleeve; 3 is first screw hole; 4 is rotating shaft; 5 is the ball joint head; 6 is base; 7 is glenoid fossa; 8 is the top arm of dentata fixing head; 9 is second screw hole; 10 is the below arm of dentata fixing head; 11 is the 3rd screw hole.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is done and to be described in further detail:
Referring to figure
The artificial atlanto-odontoid joint of this utility model comprises atlas parts, dentata parts, joint component and screw.Below in conjunction with accompanying drawing each parts is described in detail:
The atlas parts
Referring to Fig. 1 and Fig. 2: the atlas parts are made up of symmetric arc fixed plate 1 and the rotation oversleeve 2 that is fixed on the arc fixed plate axis of symmetry, and the two ends of arc fixed plate 1 are arranged with first screw hole 3 respectively.
In the preferred embodiment of this utility model, arc fixed plate 1 has downward 42 ° and 27 ° radian backward, its thickness of slab 1.6mm, and high 6.0mm, both sides first screw hole, the 3 bore dia 3.5mm of arc fixed plate 1, distance is 32.0mm between the screw hole center of circle; And the cross section external diameter of rotation oversleeve 2 is 10.0mm, and internal diameter is 6.0mm, high 6.0mm.
The dentata parts
Referring to Fig. 4 and Fig. 5: the dentata parts are made up of fixing head and the base 6 that is connected in the fixing head top, fixing head respectively left time and the lower right symmetry stretch out two pairs of arms, its two ends are respectively equipped with second screw hole 9 and the 3rd screw hole 11; Base 6 is a short cylindrical shape, and a hemispheric glenoid fossa 7 is arranged above base 6., said glenoid fossa 7 holds ball and socket joint 2/5ths three and deviates from the volley to prevent the joint; Screw is located at respectively in first screw hole 3, second screw hole 9 and the 3rd screw hole 11.
In the preferred embodiment of this utility model, the fixing head thickness of slab 1.6mm of dentata parts, two pairs of arms that this fixing head stretches out to lateral symmetry; Wherein the angle between a pair of arm 8 in top (being the top arm of dentata fixing head) is 140 °, and the angle between a pair of arm 10 in below (being the below arm of dentata fixing head) is 60 °, and the end of two pairs of arms respectively is arranged with two screw holes; Be followed successively by second screw hole 9 from top to bottom and the 3rd screw hole 11, the second screw holes 9 are the pedicle screw hole, ellipse; Distance between its central point is 14.0mm; The 3rd screw hole 11 is a dentata vertebral body screw hole, diameter 3.5mm, and distance is 8.0mm between the center of circle; Base 6 high 5.0mm, diameter is 10.0mm, base top glenoid fossa 7 diameters are 6.0mm, glenoid fossa 7 distance from bottom bases 6 bottom 1.4mm.Said first screw hole 3 and the 3rd screw hole 11 corresponding screws are the spongy bone tapping screw, diameter 3.5mm, long 13～22mm; Said second screw hole, 9 corresponding screws are pedicle screw, diameter 3.5mm, long 24～30mm.
Joint component
Referring to Fig. 3: joint component is made up of columniform rotating shaft 4 and the spherical joint head 5 that is positioned at rotating shaft 4 belows; Rotation oversleeve 2 associated section of rotating shaft 4 and atlas parts, glenoid fossa 7 associated section on spherical joint head 5 and the dentata parts base.
In the preferred embodiment of this utility model, the rotating shaft 4 high 6.0mm of joint component, diameter 6.0mm; Ball and socket joint 5 is spherical, and diameter is 6.0mm.
In addition, the described atlas parts of above this utility model, dentata parts, joint component and screw all adopt the medical titanium alloy material.
The assembly relation of the artificial atlanto-odontoid joint prosthese of this utility model is seen Fig. 6, and rotation oversleeve 2 is enclosed within on the rotating shaft 4, and ball joint head 5 is positioned at glenoid fossa 7, and screw is located at respectively in first screw hole 3, second screw hole 9 and the 3rd screw hole 11.Change oversleeve and all be finished to articular surface fineness, assurance joint less friction and wear in motor process with rotating shaft, ball and socket joint and glenoid fossa contact site.Atlas parts fixing head has downwards and radian backward; Consistent with the normal morphology of anterior arch of atlas; The trochoid joint that rotating shaft 4 and rotation oversleeve 2 are formed can guarantee unrestricted rotatablely moving between the dentata of extensive region, and ball and socket joint 5 then can make extensive region dentata generation bend and stretch and lateral flexion with the ball-and-socket joint that glenoid fossa 7 is formed, and this utility model adopts glenoid fossa to hold the design of ball and socket joint 2/3rds; Guaranteed 10 ° bend and stretch and lateral flexion; And ball and socket joint can not deviate from the volley, and trochoid joint and ball-and-socket joint cooperate then can allow the multiaxial motion between the dentata of extensive region, and such design meets normal human's physiological movement rule more.Fig. 7 A is the sketch map after this utility model is installed on the extensive region dentata, and the atlas parts adopt lateral mass screw to fix, and first screw hole, 3 entry points are positioned at the lateral mass of atlas mid point, and screw and sagittal plane are outside 10 ° of angles (Fig. 7 B); The dentata parts adopt vertebral body screw and pedicle screw double fixed; Dentata vertebral body screw entry point (i.e. the 3rd screw hole 11 entry points) is positioned at dentata vertebral body and lateral mass line mid point; Screw and sagittal plane are inside 10 ° of angles (Fig. 7 C), and dentata pedicle screw entry point (i.e. second screw hole, 9 entry points) is 5mm and the other 6mm of a preceding median sagittal plane intersection under the superior articular surface, and screw and sagittal plane are outside 25 ° of angles; Horizontal by downward 25 ° of angles (Fig. 7 D, Fig. 7 E).
The most preferred embodiment of this utility model is illustrated, and various variations of being made by those of ordinary skills or remodeling can not break away from the scope of this utility model.
Claims (9)
1. artificial atlanto-odontoid joint; Comprise atlas parts, dentata parts, joint component and screw; It is characterized in that; Said atlas parts are made up of symmetric arc fixed plate (1) and the rotation oversleeve (2) that is fixed on the said arc fixed plate axis of symmetry, and the two ends of arc fixed plate (1) are arranged with first screw hole (3) respectively; Said dentata parts are made up of fixing head and the base (6) that is connected in the fixing head top, and fixing head descends left respectively and the lower right symmetry is stretched out two pairs of arms, and its two ends are respectively equipped with second screw hole (9) and the 3rd screw hole (11); Said base (6) is a short cylindrical shape, and a hemispheric glenoid fossa (7) is arranged in the top of base (6); Said joint component is made up of columniform rotating shaft (4) and the spherical joint head (5) that is positioned at rotating shaft (4) below; Rotation oversleeve (2) associated section of said rotating shaft (4) and atlas parts, glenoid fossa (7) associated section on spherical joint head (5) and the dentata parts base.
2. artificial atlanto-odontoid joint according to claim 1 is characterized in that, said glenoid fossa (7) holds ball and socket joint (5) 2/3rds and deviates from the volley to prevent the joint; Said screw is located at respectively in first screw hole (3), second screw hole (9) and the 3rd screw hole (11).
3. artificial atlanto-odontoid joint according to claim 1 is characterized in that, said arc fixed plate (1) has downward 42 ° and 27 ° radian backward, thickness of slab 1.6mm, high 6.0mm.
4. artificial atlanto-odontoid joint according to claim 1 is characterized in that, the cross section external diameter of said rotation oversleeve (2) is 10.0mm, and internal diameter is 6.0mm, high 6.0mm.
5. artificial atlanto-odontoid joint according to claim 1 is characterized in that, both sides first screw holes (3) the bore dia 3.5mm of said arc fixed plate (1), and distance is 32.0mm between the screw hole center of circle.
6. artificial atlanto-odontoid joint according to claim 1 is characterized in that, the fixing head thickness of slab 1.6mm of said dentata parts; Two pairs of arms that this fixing head stretches out to lateral symmetry, wherein the angle between a pair of arm in top (8) is 140 °, the angle between a pair of arm in below (10) is 60 °; The end of two pairs of arms respectively is arranged with two screw holes, is followed successively by second screw hole (9) and the 3rd screw hole (11) from top to bottom, and second screw hole (9) is the pedicle screw hole; Ellipse, the distance between its central point are 14.0mm, and the 3rd screw hole (11) is a dentata vertebral body screw hole; Diameter 3.5mm, distance is 8.0mm between the center of circle; The high 5.0mm of said base (6), diameter is 10.0mm, base top glenoid fossa (7) diameter is 6.0mm, glenoid fossa (7) distance from bottom base (6) bottom 1.4mm.
7. artificial atlanto-odontoid joint according to claim 1 is characterized in that, the high 6.0mm of the rotating shaft of said joint component (4), diameter 6.0mm; Said ball and socket joint (5) is spherical, and diameter is 6.0mm.
8. artificial atlanto-odontoid joint according to claim 1 is characterized in that, said first screw hole (3) and the corresponding screw of the 3rd screw hole (11) are the spongy bone tapping screw, diameter 3.5mm, long 13～22mm; The corresponding screw of said second screw hole (9) is a pedicle screw, diameter 3.5mm, long 24～30mm.
9. artificial atlanto-odontoid joint according to claim 1 is characterized in that, said first screw hole (3) entry point is positioned at the lateral mass of atlas mid point, and screw and sagittal plane are outside 10 ° of angles; The 3rd screw hole (11) entry point is positioned at dentata vertebral body and lateral mass line mid point; Screw and sagittal plane are inside 10 ° of angles; Second screw hole (9) entry point is 5mm and the other 6mm of a preceding median sagittal plane intersection under the superior articular surface; Screw and sagittal plane are outside 25 ° of angles, horizontal by downward 25 ° of angles.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201263932U CN202096313U (en) | 2011-04-26 | 2011-04-26 | Artificial atlanto-odontoid joint |
| PCT/CN2011/077554 WO2012145971A1 (en) | 2011-04-26 | 2011-07-25 | Artificial atlanto-odontoid joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201263932U CN202096313U (en) | 2011-04-26 | 2011-04-26 | Artificial atlanto-odontoid joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202096313U true CN202096313U (en) | 2012-01-04 |
Family
ID=45382352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201263932U Expired - Fee Related CN202096313U (en) | 2011-04-26 | 2011-04-26 | Artificial atlanto-odontoid joint |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202096313U (en) |
| WO (1) | WO2012145971A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860297A (en) * | 2014-03-07 | 2014-06-18 | 西安交通大学医学院第二附属医院 | Bionic artificial atlanto-odontoid joint |
| CN103860296A (en) * | 2014-03-07 | 2014-06-18 | 西安交通大学医学院第二附属医院 | Bionic low-friction artificial atlanto-odontoid joint |
| CN105213073A (en) * | 2015-10-21 | 2016-01-06 | 重庆医科大学附属第二医院 | Rear artificial atlanto-odontoid joint |
| WO2015155789A3 (en) * | 2014-04-07 | 2016-01-14 | Salunke Pravin | Artificial implant for atlas-axis (c1-2) lateral joints and method of use thereof |
| CN107361884A (en) * | 2017-07-19 | 2017-11-21 | 北京爱康宜诚医疗器材有限公司 | Centrum prosthese |
| CN109124833A (en) * | 2018-11-08 | 2019-01-04 | 北京爱康宜诚医疗器材有限公司 | Artificial dentata |
| CN109464181A (en) * | 2018-12-20 | 2019-03-15 | 天衍医疗器材有限公司 | Rest the head on the fixed device of neck |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2587365Y (en) * | 2002-11-22 | 2003-11-26 | 北京大学第三医院 | Occipitovertibrae fixator |
| US7666208B1 (en) * | 2005-04-29 | 2010-02-23 | Asfora Ip, Llc | Posterior cervical vertebral stabilizing system |
| WO2011012705A1 (en) * | 2009-07-30 | 2011-02-03 | Universite Libre De Bruxelles | Implantable vertebral prosthesis |
| CN101664349A (en) * | 2009-09-09 | 2010-03-10 | 西安交通大学 | Artificial atlanto-odontoid process joint |
| CN201519188U (en) * | 2009-11-05 | 2010-07-07 | 胡勇 | Atlanto-odontoid joint connector |
-
2011
- 2011-04-26 CN CN2011201263932U patent/CN202096313U/en not_active Expired - Fee Related
- 2011-07-25 WO PCT/CN2011/077554 patent/WO2012145971A1/en active Application Filing
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103860297A (en) * | 2014-03-07 | 2014-06-18 | 西安交通大学医学院第二附属医院 | Bionic artificial atlanto-odontoid joint |
| CN103860296A (en) * | 2014-03-07 | 2014-06-18 | 西安交通大学医学院第二附属医院 | Bionic low-friction artificial atlanto-odontoid joint |
| CN103860297B (en) * | 2014-03-07 | 2015-12-02 | 西安交通大学医学院第二附属医院 | Biomimetic prosthetic atlanto-odontoid joint |
| CN103860296B (en) * | 2014-03-07 | 2016-02-24 | 西安交通大学医学院第二附属医院 | Bionical low friction artificial atlanto-odontoid joint |
| WO2015155789A3 (en) * | 2014-04-07 | 2016-01-14 | Salunke Pravin | Artificial implant for atlas-axis (c1-2) lateral joints and method of use thereof |
| CN106232061A (en) * | 2014-04-07 | 2016-12-14 | 普拉文·萨伦克 | Artificial implantation and using method thereof for extensive region pivot (C1 2) lateral articular |
| CN106232061B (en) * | 2014-04-07 | 2018-04-17 | 普拉文·萨伦克 | Artificial implantation and its application method for extensive region pivot (C1 2) lateral articular |
| CN105213073A (en) * | 2015-10-21 | 2016-01-06 | 重庆医科大学附属第二医院 | Rear artificial atlanto-odontoid joint |
| CN107361884A (en) * | 2017-07-19 | 2017-11-21 | 北京爱康宜诚医疗器材有限公司 | Centrum prosthese |
| CN109124833A (en) * | 2018-11-08 | 2019-01-04 | 北京爱康宜诚医疗器材有限公司 | Artificial dentata |
| CN109464181A (en) * | 2018-12-20 | 2019-03-15 | 天衍医疗器材有限公司 | Rest the head on the fixed device of neck |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012145971A1 (en) | 2012-11-01 |
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