CN205054511U - Artifical extensive region tooth joint - Google Patents
Artifical extensive region tooth joint Download PDFInfo
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- CN205054511U CN205054511U CN201520820394.5U CN201520820394U CN205054511U CN 205054511 U CN205054511 U CN 205054511U CN 201520820394 U CN201520820394 U CN 201520820394U CN 205054511 U CN205054511 U CN 205054511U
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- fixed body
- rolling element
- groove
- joint according
- pole
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Abstract
The utility model discloses an artifical extensive region tooth joint, including extensive region vertebra part, dentata part and joint part, extensive region vertebra part includes curved fixed body and the symmetrical bone connecting piece of establishing at fixed body both ends, be equipped with curved recess on the fixed body, the dentata part includes the bone link, the bone link is linked to each other by two straight -bars and is " V " shape, the joint part is including festival pole and rolling element, the lower extreme of festival pole is connected and is connected the crossing position at two straight -bars in rolling element, upper end, the rolling element is established can be by section pole drive respectively towards each to slope and rotation in the recess, the utility model discloses simple structure can follow two aspects of morphology and mechanics and carry on bionically to normal person body extensive region tooth joint, and normal motion between the dentata of extensive region has made it to guarantee.
Description
Technical field
This utility model relates to a kind of medical prosthesis, particularly a kind of artificial atlanto-odontoid joint.
Background technology
The articulatio atlantoepistrophica of human body comprises three independently joints, two lateral atlantoaxial joints be namely made up of atlas inferior articular process and superior articular process of axis; And by the median atlantoaxial joint formed between the posterior articular facet after dens axis and anterior arch of atlas and transverse ligament of atlas, also known as atlanto-odontoid joint.Lateral atlantoaxial joint is plane, and atlanto-odontoid joint is axletree shape, and both coordinate can make head rotate around tooth is prominent together with atlas, allows a small amount of bending and stretching and side Qu Yundong simultaneously.
At present, the atlanto-axial instability that a variety of causes causes and neck epimere compression of spinal cord all need operation to remove nerve compression, front road Odontoidectomy decompression is ideal modus operandi, but the atlanto-odontoid joint structure due to this surgical disruption, can cause or increase the weight of cervical spine instabily, therefore must row fusion to be to eliminate shakiness again, the Therapeutic Method that this decompression adds fusion is considered to the treatment technology of standard always, but in long-term practice process, also occurred many problems and defect.The result for example merged is obtaining stable while, sacrifice the topmost spinfunction of articulatio atlantoepistrophica, after causing operation in patients, particularly rotary motion is obviously limited in incidence activity, and cervical vertebra after merging will produce long-term negative effect to the physiology of cervical vertebra and biomechanics characteristic due to motion and the forfeiture of spring function.In addition, the problem paid close attention to the most closes on the stress conduction of non-Fusion levels after merging and stress concentrates the complication such as the regression gradually of caused cervical vertebra, unstability and pain, and the problem such as the second operation caused thus.
Therefore, how on the basis of fully decompression, to maintain the stability of resting the head on extensive region pivot complex, and retain the trend that its motor function will be this position Internal fixation technology development from now on to greatest extent.For this problem, cervical vertebra surgeon starts to seek to retain spinal column non-fusion technology partly or entirely movable between atlas to replace traditional integration technology in recent years; Problems such as if the atlanto-odontoid joint in displacement human body front, must pass through oral approach, it exists, and perioprative management difficulty is large, visual area reservation is more difficult, the narrow and small and postoperative infection risk in working place is higher in art; In order to avoid the problem that anterior approach brings, adopt Posterior approach to insert artificial atlanto-odontoid joint and just can efficiently avoid the problem that anterior approach brings, and the current artificial atlanto-odontoid joint being suitable for Posterior approach that there is no successful design both at home and abroad and meet human body physiological function completely.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of artificial atlanto-odontoid joint, and structure is simple, can carry out bionical from morphology and mechanics two aspect, make it ensure that and move normally between atlas and axis normal human's atlanto-odontoid joint.
Artificial atlanto-odontoid joint of the present utility model, comprises atlas parts, dentata parts and joint component, and described atlas parts comprise the bone connector that the fixed body of arc and symmetry are located at fixed body two ends, and described fixed body is provided with the groove of arc; Described dentata parts comprise bone link, and described bone link is connected and V-shaped by two straight-bars; Described joint component comprises pole and rolling element, the intersection area that the lower end of described pole is connected to rolling element, upper end is connected to two straight-bars, described rolling element to be located in groove and can be driven by pole and respectively towards each to inclination and rotate.
Further, described rolling element is ellipsoid shape; The longitudinal section of described groove is runway shape, and described fixed body extends to form restriction ear for preventing rolling element from deviating from groove in the open top edge of groove to groove.
Further, described rolling element is provided with connecting hole, and the lower end of described pole is provided with connecting portion, and described connecting portion coaxially stretches into connecting hole and is threaded.
Further, the transverse ends of described rolling element laterally Qie Ping and formed for limit rolling element roll restriction face.
Further, the upper end edge of described rolling element is laterally cut flat and forms top planes, and the opening of described connecting hole is in top planes center; Longitudinal diameter of described rolling element is 4mm, and the diameter in described restriction face is 2.4mm.
Further, described atlas parts also comprise the elastomer be located at for making muscular tissue and chute completely cut off on fixed body.
Further, in the form of sheets and its bottom surface extends to form in inverse-T-shaped mounting bar downwards, the surface of described fixed body is provided with the mounting groove with mounting bar form-fit to described elastomer, and described mounting bar embeds mounting groove and makes elastomer be fixed on fixed body surface.
Further, described elastomer adopts Polyurethane Thermoplastic Elastomer rubber to make.
Further, the radian of described groove is identical with the radian of fixed body, and described groove runs through fixed body; Described atlas parts also comprise the end cap being connected to fixed body two ends, and described end cap is provided with the fixing hole for being connected with fixed body and the through hole for passing for bone connector.
Further, the radian of described fixed body is 70 °-75 °; Angle described in two between straight-bar is 80 °-100 °; Angle between described pole and each straight-bar is 90 °-120 °.
The beneficial effects of the utility model: artificial atlanto-odontoid joint of the present utility model, atlas parts and dentata parts are separately fixed on atlas and dentata, by the corresponding matching of groove, rolling element and pole, not only remain the spinfunction of artificial atlanto-odontoid joint, and have certain lateroflexion and anteflexion, after stretch function; Meanwhile, amount of articulation of the present utility model is less, and the complexity of structure reduces, stability improves; In further scheme, by realizing lateroflexion and the restriction of bending and stretching angle modular construction, making this utility model more meet the mobility of normal physiological condition, decreasing the probability of dislocation; And by elastomeric, effective preventer tool is set to the crush injury of human muscular tissue; This utility model carries out from the morphology and mechanics bionical to normal human's atlanto-odontoid joint, ensure that and move normally between atlas and axis.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further described:
Fig. 1 is top view of the present utility model;
Fig. 2 is Y-Y sectional view in Fig. 1;
Fig. 3 is the top view of fixed body of the present utility model;
Fig. 4 is A-A sectional view in Fig. 3;
Fig. 5 is the structural representation of bone link;
Fig. 6 is the connection diagram of bone link and pole;
Fig. 7 is the top view of rolling element
Fig. 8 is the left view of rolling element;
Fig. 9 is elastomeric top view;
Figure 10 is B-B sectional view in Fig. 9;
Figure 11 is the left view of end cap.
Detailed description of the invention
As shown in the figure: the artificial atlanto-odontoid joint of the present embodiment, comprise atlas parts, dentata parts and joint component, described atlas parts comprise the bone connector 2 that the fixed body 1 of arc and symmetry are located at fixed body 1 two ends, and described fixed body 1 is provided with the groove 3 of arc; Described dentata parts comprise bone link, and described bone link is connected and V-shaped by two straight-bars 4; Described joint component comprises pole 5 and rolling element 6, the intersection area that the lower end of described pole 5 is connected to rolling element 6, upper end is connected to two straight-bars 4, described rolling element 6 to be located in groove 3 and can be driven by pole 5 and respectively towards each to inclination and rotate; Fixed body 1, bone connector 2, straight-bar 4 and pole 5 are all preferably cylindric, to reduce the damage to human body soft tissue; Rolling element 6 is stuck in groove 3, is convenient to assembling, improves the flexibility ratio of motion simultaneously; The radian measure alpha of described fixed body 1 can be 70 °-75 °, is preferably 72 °; Angle β described in two between straight-bar 4 is 80 °-100 °, is preferably 90 °; Angle γ between described pole 5 and each straight-bar 4 is 90 °-120 °, is preferably 115 °; Atlas parts and dentata parts are separately fixed on atlas and dentata, by the corresponding matching of groove 3, rolling element 6 and pole 5, not only remain the spinfunction of artificial atlanto-odontoid joint, and have certain lateroflexion and anteflexion, after stretch function.
In the present embodiment, described rolling element 6 is in ellipsoid shape; The longitudinal section of described groove 3 is runway shape, and described fixed body 1 extends to form the restriction ear 7 for preventing rolling element 6 from deviating from groove 3 at the open top edge of groove 3 to groove 3; Runway shape and square composite figure shape semicircular with both sides; Longitudinal diameter D of rolling element 6 is 4mm, and the width E of groove 3 is also 4mm; Restriction ear 7 limits moving upward of rolling element 6, prevents it from deviating from groove 3; Distance F between two restriction ears 7 is 2.8mm; Described rolling element 6 is provided with connecting hole 8, and the lower end of described pole 5 is provided with connecting portion 9, and described connecting portion 9 coaxially stretches into connecting hole 8 and is threaded; Connecting hole 8 is the Screw hole structure of M1.6; The bar footpath of pole 5, straight-bar 4 is 2.8mm, and connecting portion 9 is the screw-rod structure of M1.6; Connecting portion 9 and connecting hole 8 are threaded connection, and are convenient to installation and removal; The transverse ends of described rolling element 6 laterally Qie Ping and form the restriction face 10 of rolling for limiting rolling element 6; The upper end edge of described rolling element 6 is laterally cut flat and forms top planes 11, and the opening of described connecting hole 8 is in top planes 11 center; The diameter G in described restriction face 10 is 2.4mm; Adopt this structure, rolling element 6 can realize being rotated within the scope of 60 ° rotate and within the scope of 5 ° left and right bend and stretch, make patient can complete corresponding head movement, more meet the mobility of normal physiological condition, and decrease the probability of dislocation.
In the present embodiment, described atlas parts also comprise the elastomer 12 be located at for making muscular tissue and chute completely cut off on fixed body 1; Elastomer 12 effective preventer tool is set to the crush injury of human muscular tissue; Described elastomer 12 in the form of sheets and its bottom surface extends to form in inverse-T-shaped mounting bar 13 downwards, the surface of described fixed body 1 is provided with the mounting groove 14 with mounting bar 13 form-fit, and described mounting bar 13 embeds mounting groove 14 and makes elastomer 12 be fixed on fixed body 1 surface; The thickness of elastomer 12 is 0.35mm, and adopt Polyurethane Thermoplastic Elastomer 12 rubber to make, its mechanical strength is high, good processability, can keep splendid resistance to flexion characteristic under various circumstances; The present embodiment arranges two panels elastomer 12 altogether and arranges along the both sides of chute respectively, and its radian and length can be determined according to the practical situation of fixed body 1.
In the present embodiment, the radian of described groove 3 is identical with the radian of fixed body 1, and described groove 3 runs through fixed body 1, is convenient to the installation of rolling element 6; Described atlas parts also comprise the end cap 15 being connected to fixed body 1 two ends, and described end cap 15 is provided with the fixing hole 16 for being connected with fixed body 1 and the through hole 17 for passing for bone connector 2; Fixing hole is the Screw hole structure of M1.6; The diameter of through hole is corresponding to bone connector 2, is 3.3mm.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail this utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (10)
1. an artificial atlanto-odontoid joint, comprises atlas parts, dentata parts and joint component, it is characterized in that: described atlas parts comprise the bone connector that the fixed body of arc and symmetry are located at fixed body two ends, and described fixed body is provided with the groove of arc; Described dentata parts comprise bone link, and described bone link is connected and V-shaped by two straight-bars; Described joint component comprises pole and rolling element, the intersection area that the lower end of described pole is connected to rolling element, upper end is connected to two straight-bars, described rolling element to be located in groove and can be driven by pole and respectively towards each to inclination and rotate.
2. artificial atlanto-odontoid joint according to claim 1, is characterized in that: described rolling element is ellipsoid shape; The longitudinal section of described groove is runway shape, and described fixed body extends to form restriction ear for preventing rolling element from deviating from groove in the open top edge of groove to groove.
3. artificial atlanto-odontoid joint according to claim 2, is characterized in that: described rolling element is provided with connecting hole, and the lower end of described pole is provided with connecting portion, and described connecting portion coaxially stretches into connecting hole and is threaded.
4. artificial atlanto-odontoid joint according to claim 3, is characterized in that: the transverse ends of described rolling element laterally Qie Ping and form the restriction face of rolling for limiting rolling element.
5. artificial atlanto-odontoid joint according to claim 4, is characterized in that: the upper end edge of described rolling element is laterally cut flat and forms top planes, and the opening of described connecting hole is in top planes center; Longitudinal diameter of described rolling element is 4mm, and the diameter in described restriction face is 2.4mm.
6. artificial atlanto-odontoid joint according to claim 1, is characterized in that: described atlas parts also comprise the elastomer be located at for making muscular tissue and chute completely cut off on fixed body.
7. artificial atlanto-odontoid joint according to claim 6, it is characterized in that: described elastomer in the form of sheets and its bottom surface extends to form in inverse-T-shaped mounting bar downwards, the surface of described fixed body is provided with the mounting groove with mounting bar form-fit, and described mounting bar embeds mounting groove and makes elastomer be fixed on fixed body surface.
8. artificial atlanto-odontoid joint according to claim 6, is characterized in that: described elastomer adopts Polyurethane Thermoplastic Elastomer rubber to make.
9. artificial atlanto-odontoid joint according to claim 1, is characterized in that: the radian of described groove is identical with the radian of fixed body, and described groove runs through fixed body; Described atlas parts also comprise the end cap being connected to fixed body two ends, and described end cap is provided with the fixing hole for being connected with fixed body and the through hole for passing for bone connector.
10. artificial atlanto-odontoid joint according to claim 1, is characterized in that: the radian of described fixed body is 70 °-75 °; Angle described in two between straight-bar is 80 °-100 °; Angle between described pole and each straight-bar is 90 °-120 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520820394.5U CN205054511U (en) | 2015-10-21 | 2015-10-21 | Artifical extensive region tooth joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520820394.5U CN205054511U (en) | 2015-10-21 | 2015-10-21 | Artifical extensive region tooth joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205054511U true CN205054511U (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520820394.5U Expired - Fee Related CN205054511U (en) | 2015-10-21 | 2015-10-21 | Artifical extensive region tooth joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205054511U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-10-21 CN CN201520820394.5U patent/CN205054511U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20181021 |
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| CF01 | Termination of patent right due to non-payment of annual fee |