CN208958289U - Articulatio sacroiliaca fixator - Google Patents

Abstract

The utility model provides a kind of articulatio sacroiliaca fixator, belongs to the field of medical instrument technology.Ontology including prism-shaped, ontology is equipped with the through-hole being used for across guide pin penetrated through along body axis direction, one end of ontology is for guiding ontology to be implanted into the introduction part in articulatio sacroiliaca, the other end of ontology is the tail portion for penetrating guide pin, the outer wall of ontology is equipped with several protrusion body outer walls and is directed toward the boss for preventing ontology from skidding off articulatio sacroiliaca of tail portion, and the outer wall of ontology and boss is equipped with several growth holes for being used to promote bone growth.Articulatio sacroiliaca fixator provided by the utility model aims to solve the problem that existing articulatio sacroiliaca fixator is difficult to fix at articulatio sacroiliaca, and postoperative articulatio sacroiliaca fixator is difficult to the problem of merging with bone tissue.Articulatio sacroiliaca fixator provided by the utility model, which is able to achieve, effectively to be merged and fixes with articulatio sacroiliaca.

Description

Articulatio sacroiliaca fixator

Technical field

The utility model belongs to the field of medical instrument technology, is to be related to a kind of articulatio sacroiliaca fixator more specifically.

Background technique

Articulatio sacroiliaca be pelvis rumpbone between ilium by the joint in conjunction with ligament, with articular cartilage and meeting The chain irregular arthrodia swelled and be recessed of two bones is generated, rumpbone supports vertebra and again by the ilium branch on every side Support.

Pain relevant to articulatio sacroiliaca can by the traumatic fractue dislocation of pelvis, degenerative arthritis, sacro-iliitis, Other of osteitis condensans ilii or articulatio sacroiliaca degenerative pathologies cause.Currently, the shell therapy that these symptom are advocated the most is sacrum Ilium joint fusion.

Articulatio sacroiliaca fusion can be reached by several different existing methods, mainly cover preceding path method, posterior approach and Lateral approach, screw or other kinds of implantation material are probeed into inside articulatio sacroiliaca by guide pin to be fixed.However, existing sacrum ilium Joint fixation apparatus is difficult to fix at articulatio sacroiliaca, and bone tissue is difficult to merge with articulatio sacroiliaca after surgery, leads to patient's art Posterior joint restores slow, high recurrence rate.

Utility model content

The purpose of this utility model is to provide a kind of articulatio sacroiliaca fixators, it is intended to solve existing articulatio sacroiliaca fixator It is difficult to fix at articulatio sacroiliaca, and postoperative articulatio sacroiliaca fixator is difficult to the problem of merging with bone tissue.

In order to achieve the above purposes, the technical solution adopted by the utility model is: provides a kind of articulatio sacroiliaca fixator, including The ontology of prism-shaped, ontology be equipped with along body axis direction penetrate through for the through-hole across guide pin, one end of ontology for for Guide the introduction part in ontology implantation articulatio sacroiliaca, the other end of ontology is the tail portion for penetrating guide pin, on the outer wall of ontology The boss for preventing ontology from skidding off articulatio sacroiliaca for protruding body outer walls equipped with several and being directed toward tail portion, ontology and boss Outer wall is equipped with several growth holes for being used to promote bone growth.

Further, the structure of ontology is triangular prism shape.

Further, boss is trigone frustum, several boss are uniformly distributed along the length direction of ontology, and several three The axis of the frustum of a pyramid is overlapped with the axis of ontology, and the big end of several trigone frustums is towards tail portion.

Further, three sides of trigone frustum and three sides of ontology correspond.

Further, the section of trigone frustum small end and the section of ontology are identical.

Further, the large end face of trigone frustum is triangular structure, and each apex angle of triangular structure is fillet.

Further, the coating for promoting bone tissue to increase is equipped on the outer wall of ontology and boss.

Further, the material of coating is hydroxyapatite.

Further, the aperture in hole is grown between 0.1-1mm, grows the depth in hole between 1-2mm.

Further, the sum of area shared by several growth holes is at least the sum of ontology and boss external surface area 60%.

The beneficial effect of articulatio sacroiliaca fixator provided by the utility model is: compared with prior art, this is practical new The ontology of type device is using prism-shaped and boss is arranged in the body exterior of prism-shaped, and relative to cylindric, the ontology of prism-shaped is not It is only capable of preferably abutting fixation with articulatio sacroiliaca, meanwhile, the boss of body exterior has advanced optimized the present apparatus and articulatio sacroiliaca Stability maintenance, guide pin is penetrated through-hole and be sent into the present apparatus by tail portion needs fixed position, and introduction part is as guidance End guidance ontology is sent into the position that need to be fixed, and the growth hole being arranged on the outer wall of ontology and the side wall of boss peomotes bone group It the growth knitted and is merged with the present apparatus.

Detailed description of the invention

Fig. 1 is the structural schematic diagram one of articulatio sacroiliaca fixator provided by the embodiment of the utility model；

Fig. 2 is the structural schematic diagram two of articulatio sacroiliaca fixator provided by the embodiment of the utility model；

Fig. 3 makes a living the microstructure schematic diagram of long hole.

In figure: 1, ontology；11, introduction part；12, tail portion；2, through-hole；3, boss；4, hole is grown.

Specific embodiment

In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.

It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

Fig. 1 and Fig. 2 are please referred to, now articulatio sacroiliaca fixator provided by the utility model is illustrated.Articulatio sacroiliaca is solid Determine device, the ontology 1 including prism-shaped, ontology 1 is equipped with the through-hole 2 being used for across guide pin penetrated through along 1 axis direction of ontology, ontology 1 one end is for guiding ontology 1 to be implanted into the introduction part 11 in articulatio sacroiliaca, and the other end of ontology 1 is for penetrating guide pin Tail portion 12, the outer wall of ontology 1 be equipped with several protrusion 1 outer walls of ontology and be directed toward tail portion 12 for preventing ontology 1 from skidding off sacrum The outer wall of the boss 3 in ilium joint, ontology 1 and boss 3 is equipped with several growth holes 4 for being used to promote bone growth.

Compared with prior art, the ontology 1 of utility model device uses sets on prism-shaped and the body outer wall of prism-shaped Boss 3 is set, relative to cylindric, the ontology 1 of prism-shaped can not only preferably abut fixation with articulatio sacroiliaca, meanwhile, outside ontology 1 The boss 3 in portion has advanced optimized the stability maintenance of the present apparatus and articulatio sacroiliaca, and guide pin penetrates through-hole 2 by tail portion 12 and incites somebody to action The present apparatus, which is sent into, needs fixed position, and introduction part 11 is sent into the position that need to be fixed as leading end guidance ontology, outside ontology 1 The growth hole 4 that is arranged on the side wall of wall and boss 3 peomotes the growth of bone tissue and merges with the present apparatus.

Ontology 1 with boss 3 is made of long life material, and long life material is not over time by surrounding bone or tissue Apparent bio-absorbable or re-absorption, the ontology 1 with boss 3 articulatio sacroiliaca need fixed position can stop is enough it is steady Determine the fracture location enough stable time or permanently stay in the articulatio sacroiliaca of patient, such material includes but is not limited to Metal, ceramics or combinations thereof are replaced in titanium, titanium alloy, operation steel or any other joint.

Further, Fig. 1 and Fig. 2 are please referred to, one kind as articulatio sacroiliaca fixator provided by the utility model is specific Embodiment, the structure of ontology 1 are triangular prism shape.Ontology 1 can use polygonal prism shape according to actual needs, be not limited to this reality The triangular prism shape of example offer is provided；The plantation stability of articulatio sacroiliaca fixator is influenced by 1 geometry of ontology, triangular prism shape Ontology 1 relative to columned ontology, in the load of axial, side direction and direction of rotation by ontology 1, have more excellent The ability not deviated；Two adjacent sides of ontology 1 use fillet rounding off, and wedge angle is avoided to injure bone tissue.

Further, Fig. 1 and Fig. 2 are please referred to, one kind as articulatio sacroiliaca fixator provided by the utility model is specific Embodiment, boss 3 are trigone frustum, several boss 3 are uniformly distributed along the length direction of ontology 1, and several triangular pyramids The axis of platform is overlapped with the axis of ontology 1, and the big end of several trigone frustums is towards tail portion 12.The small end court of trigone frustum Combine together fixation to introduction part 11 and with 1 coaxial line of ontology, the sizes of several trigone frustum big ends can it is identical not yet Together, it is configured according to actual needs.The part that triangular pyramid platform convex goes out ontology 1 may be configured as discontinuous, along 1 axis direction of ontology The groove for going out 1 part of ontology through triangular pyramid platform convex is set, and triangular pyramid is run through perpendicular to 1 axis direction of ontology in groove edge outward Platform, the inner surface of groove are again provided with growth hole, several grooves increase the external surface area of the present apparatus, facilitate bone tissue with The fusion of the present apparatus is fixed.

Further, Fig. 1 and Fig. 2 are please referred to, one kind as articulatio sacroiliaca fixator provided by the utility model is specific Embodiment, three sides of trigone frustum and three sides of ontology 1 correspond.Several trigone frustums are around 1 axis of ontology The angle of line is configured according to actual needs, and three sides of trigone frustum can be corresponded to each other with three sides of ontology 1, It can also be not corresponding to each other.

Further, Fig. 1 and Fig. 2 are please referred to, one kind as articulatio sacroiliaca fixator provided by the utility model is specific The section of embodiment, trigone frustum small end is identical as the section of ontology 1.The big end size of trigone frustum and small end size can be with It is identical can not also be identical, be arranged according to actual needs, in the present embodiment, several trigone frustums are identical,

Further, Fig. 1 and Fig. 2 are please referred to, one kind as articulatio sacroiliaca fixator provided by the utility model is specific Embodiment, the large end face of trigone frustum are triangular structure, and each apex angle of triangular structure is fillet.Trigone frustum it is big End face can be extended to round or more seamed edge types, and in the present embodiment, the structure of the large end face and ontology 1 of trigone frustum is consistent.

Further, a kind of specific embodiment as articulatio sacroiliaca fixator provided by the utility model, 1 He of ontology The coating for promoting bone tissue to increase is equipped on the outer wall of boss 3.Coating can be the setting of the form of coating or surface treatment On the outer wall of ontology 1 and boss 3, for promoting bone growth and merging fixation with the present apparatus.

Further, a kind of specific embodiment as articulatio sacroiliaca fixator provided by the utility model, coating Material is hydroxyapatite.Coating can also include biological assistant, promote bone growth, reduce inflammation and pain.

Further, referring to Fig. 3, a kind of specific embodiment party as articulatio sacroiliaca fixator provided by the utility model Formula grows the aperture in hole 4 between 0.1-1mm, grows the depth in hole 4 between 1-2mm.The outer wall of the present apparatus can be with bone group Knitting the fixed surface of fusion includes the outer wall of ontology 1 and the outer wall of boss 3, sets above-mentioned coating on outer wall, coating can for coating or Sinter molding, growth hole 4 are arranged on coating；Grow the loose net that hole 4 can be through-hole, blind hole, surface texture, similar steel wire lump Shape structure or combinations thereof, in the present embodiment, the mesh knot of naturally molding irregular bumps when growth hole 4 is using sintering Structure, as shown in figure 3, coating surface is the rough surface texture with blind hole, the deeper part of color is that depth is deeper Growth hole 4, grow hole 4 shape size and hole opening direction be irregular distribution arrangement, the shallower part of color It is similarly the surface texture with different depths for bone tissue apposition growth of sinter molding.

Further, referring to Fig. 3, a kind of specific embodiment party as articulatio sacroiliaca fixator provided by the utility model Formula, several grow 60% that the sum of area shared by holes 4 is at least the sum of ontology 1 and 3 external surface area of boss.Several growths The setting in hole 4 increases the surface area of the present apparatus, promotes bone lengthening and merges fixation with the present apparatus.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (10)

1. a kind of articulatio sacroiliaca fixator, which is characterized in that the ontology (1) including prism-shaped, the ontology (1) are equipped with along described The through-hole (2) of ontology (1) axis direction perforation being used for across guide pin, one end of the ontology (1) are for guiding described Body (1) is implanted into the introduction part (11) in articulatio sacroiliaca, and the other end of the ontology (1) is the tail portion (12) for penetrating guide pin, The outer wall of the ontology (1) be equipped with several protrude described ontology (1) outer walls and be directed toward the tail portion (12) for preventing The ontology (1) skids off the boss (3) of articulatio sacroiliaca, and the outer wall of the ontology (1) and the boss (3) is equipped with several use In the growth hole (4) for promoting bone growth.

2. articulatio sacroiliaca fixator as described in claim 1, it is characterised in that: the structure of the ontology (1) is triangular prism shape.

3. articulatio sacroiliaca fixator as described in claim 1, it is characterised in that: the boss (3) is trigone frustum, several The boss (3) is uniformly distributed along the length direction of the ontology (1), and the axis of several trigone frustums with it is described The axis of ontology (1) is overlapped, and the big end of several trigone frustums is towards the tail portion (12).

4. articulatio sacroiliaca fixator as claimed in claim 3, it is characterised in that: three sides of the trigone frustum with it is described Three sides of ontology (1) correspond.

5. articulatio sacroiliaca fixator as claimed in claim 3, it is characterised in that: the section of the trigone frustum small end with it is described The section of ontology (1) is identical.

6. articulatio sacroiliaca fixator as claimed in claim 3, it is characterised in that: the large end face of the trigone frustum is triangle Structure, each apex angle of the triangular structure are fillet.

7. articulatio sacroiliaca fixator as described in claim 1, it is characterised in that: the ontology (1) and the boss (3) it is outer The coating for promoting bone tissue to increase is equipped on wall.

8. articulatio sacroiliaca fixator as claimed in claim 7, it is characterised in that: the material of the coating is hydroxyapatite.

9. articulatio sacroiliaca fixator as described in claim 1, it is characterised in that: the aperture of growth hole (4) is in 0.1-1mm Between, the depth of growth hole (4) is between 1-2mm.

10. articulatio sacroiliaca fixator as described in claim 1, it is characterised in that: face shared by several described growth holes (4) The sum of product is at least the 60% of the sum of the ontology (1) and the boss (3) external surface area.