CN209220463U - A kind of intramedullary nail with locking steel plate effect - Google Patents
A kind of intramedullary nail with locking steel plate effect Download PDFInfo
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- CN209220463U CN209220463U CN201820541151.1U CN201820541151U CN209220463U CN 209220463 U CN209220463 U CN 209220463U CN 201820541151 U CN201820541151 U CN 201820541151U CN 209220463 U CN209220463 U CN 209220463U
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- locking
- nail
- self
- intramedullary nail
- intramedullary
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Abstract
The utility model relates to a kind of intramedullary nails with locking steel plate effect, belong to the field of medical instrument technology.It includes intramedullary nail and the self-locking nail that is set on intramedullary nail, and cross one another connection between the intramedullary nail and self-locking nail, and shape is integral；The intramedullary nail includes circular body and threaded hole；The circular body is equipped with several equally distributed locking screw thread holes；The self-locking nail is locking self-locking nail or non-locking self-locking nail.The utility model, which provides, has the intramedullary nail of locking connection for long tubular bone fracture, bone defect, not only with the fixed function of Common intramedullary nail, and the fixed function the same with locking steel plate, have the fixed effect of intramedullary nail and locking steel plate concurrently, absolute is provided for fracture end, therefore more preferable compared with the stability of Common intramedullary nail；The intramedullary nail of two non-locking connections, only with the fixed function of Common intramedullary nail, provides relative stability for long tubular bone fracture, bone defect for fracture end.Locking nail or the connection of non-locking nail can be selected, provides absolute stability or metastable fixed effect to bone stump as the case may be or in different phase.
Description
Technical field
The utility model relates to a kind of intramedullary nails with locking steel plate effect, can specifically provide one kind and have concurrently in common marrow
The intramedullary nail of nail and locking steel plate fixed effect, it is more preferable compared with the stability of Common intramedullary nail, it can be absolute according to providing bone stump
Stable fixed effect, belongs to the field of medical instrument technology.
Background technique
Acropathy long bone fractures or bone defect clinic are common, and intramedullary nail or steel plate screw are most effective surgical menopause methods.
When fixed, steel plate is located at bone side, belongs to eccentric fixation, is easily bent fracture, and intramedullary nail is located at bone center, belongs to
Centre is fixed, and has the advantages that be not easy bend fracture, and mechanics effect is better than steel plate, for limbs long cannon bone shaft fracture or bone defect
Intramedullary nail is preferred internal fixation method, but connection is locked between the threaded hole and lock screw of locking steel plate, can be in steel plate
There is provided in the case of not contacting with bone has absolute fixed effect.
But in long bone comminuted fracture, nearly setting board of skeleton end fracture, bone occurs not after existing Common intramedullary nail is fixed
It healing more common, clinical report nonunion rate after femur and fracture of tibia or bone defect Intramedullary nailing is about 10%-20%,
Main cause is that fracture end stability is not good enough.Because being non-locking connection between the self-locking nail and intramedullary nail of existing intramedullary nail,
Smaller gap is connected with i.e. between self-locking nail and intramedullary nail；Followed by the self-locking nail both ends that are respectively positioned on intramedullary nail, distance are located at
Farther out, control fracture end horizontal plane displacement effect is poor for the fracture end in center.In this way, due to being used in marrow in nearly setting board of skeleton end fracture
When nail is fixed, pulp cavity side is larger, the other side is smaller, there is larger gap between larger pulp cavity side intramedullary nail and pulp cavity, in this way,
Fracture end there is the fine motion of horizontal plane.Fine motion caused by studies have shown that horizontal plane shearing force and rotary force is to union
Unfavorable.For this purpose, the postoperative nonunion of Intramedullary nailing occurs, effective treatment method is increased in a locking steel plate in fracture end
Fixed (referred to as " additional steel plate "), can be with quick healing with the fine motion in elimination of level face, fracture, this is current research common recognition.
Before in those early years, to the postoperative nonunion of Intramedullary nailing or delayed union person occurs, once using stop nail method (pulp cavity compared with
Pulp cavity is implanted into screw by the intramedullary nail of the nearly fracture end of big side) fine motion of fracture end can be reduced, but do not completely eliminate yet
Horizontal plane fine motion, therefore some patientss are invalid, generally it is reliable to be not so good as additional steel plate for effect.In multi-segmental fracture, intramedullary nail
Fixation is especially poor to interlude fracture stability, is easy to happen displacement and bone nonunion occurs.
It currently, the screw hole on intramedullary nail used is respectively positioned on the both ends of intramedullary nail, and is all non-threaded hole.Friendship used
Pinning has two kinds, and one is the rear portions of self-locking nail screw thread, and front middle part is non-threaded, and non-lock is connected as between intramedullary nail and self-locking nail
It is fixed fixed, it is fixed by nearside cortex bone screw holes；Another kind is that there is a screw thread in the preceding middle and back of self-locking nail, but self-locking nail diameter compared with
Screw hole is small, and non-locking fixation is connected as between intramedullary nail and self-locking nail, i.e., is connected with smaller sky between self-locking nail and intramedullary nail
Gap is fixed by nearside and contralateral cortex bone screw holes.So far, there is not yet the connection between self-locking nail and intramedullary nail is as self-locking nail and lock
Determining steel plate equally is multiple lock hole locking persons of being fixedly connected.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned shortcomings, provide a kind of intramedullary nail with locking steel plate effect,
It has both Common intramedullary nail and locking steel plate fixed effect, more preferable compared with the stability of Common intramedullary nail, can according to the different state of an illness and
Different phase selects locking nail or non-locking nail, forms absolute stability or metastable fixed effect to bone stump.
It the technical solution of the utility model, a kind of intramedullary nail with locking steel plate effect, including intramedullary nail and is set to
Self-locking nail on intramedullary nail, cross one another connection between the intramedullary nail and self-locking nail, and shape is integral；
The intramedullary nail includes circular body and threaded hole；The circular body is equipped with several equally distributed locking spiral shells
Pit；
The self-locking nail is locking self-locking nail or non-locking self-locking nail.
The locking self-locking nail includes front threads, middle part screw thread and rear threads；The diameter of the middle part screw thread is greater than
The diameter of front threads, rear threads is greater than middle part screw thread.
The non-locking self-locking nail includes front middle part fixed part and rear portion fixed part；The front middle part fixed part is non-threaded,
Rear portion fixed part has screw thread, and the diameter of middle part fixed part is less than rear portion fixed part.
The threaded hole is uniformly distributed on the center and both ends of circular body, in the coronal-plane and sagittal of circular body
Face cross-distribution, the diameter and self-locking nail matches mutually of threaded hole.
The screw pitch and diameter of the middle part screw thread of the locking self-locking nail match with the screw pitch of threaded hole and diameter, form lock
Fixed fixed, front threads are fixed with contralateral cortex bone screw, and rear threads are fixed with nearside cortical screw hole.
The front middle part fixed part of the non-locking self-locking nail and the non-locking connection of intramedullary nail have a gap, rear portion fixed part with
Nearside cortical screw hole is fixed.
The self-locking nail includes locking self-locking nail and non-locking self-locking nail, the locking spiral shell of the locking self-locking nail and intramedullary nail
Pit locking is fixed, and non-locking self-locking nail and the non-locking fixation of intramedullary nail select different fixed forms as the case may be, is realized
Intramedullary nail and self-locking nail lock or the fixed effect of non-locking fixation.
The intramedullary nail and self-locking nail are titanium alloy material.
When using locking self-locking nail, especially when nearly fracture end is using locking self-locking nail, intramedullary nail and locking self-locking nail
Between closely connected by locking screw thread hole and screw thread, while the front and rear bone of opposite side and nearside cortical bone and self-locking nail are securely solid
Fixed, fracture end provides bone stump absolute without any fine motion；When using non-locking self-locking nail, as Common intramedullary nail,
Smaller gap is connected between intramedullary nail and self-locking nail allows fine motion, provides bone stump relative stability.
For the intramedullary nail diameter as Common intramedullary nail, intramedullary nail has diameter 6-14mm different size titanium alloy or other
Medical metal；Master nails on threaded hole as locking steel plate upper screwed hole, screw pitch 0.4mm or so, total 8-12 screw thread pore size distribution
Both ends and center portion in intramedullary nail.
Have the intramedullary nail of locking connection to long bone bone the utility model has the beneficial effects that the utility model provides
For folding, bone defect, not only with the fixed function of Common intramedullary nail, but also the fixed function the same with locking steel plate, i.e.,
It has the fixed effect of intramedullary nail and locking steel plate concurrently, provides absolute for fracture end, therefore steady compared with Common intramedullary nail
It is qualitative more preferable；The intramedullary nail of two non-locking connections is for long tubular bone fracture, bone defect, only with the fixation of Common intramedullary nail
Effect, provides relative stability for fracture end.Locking nail or non-locking nail can be selected as the case may be or in different phase
Connection provides absolute stability or metastable fixed effect to bone stump.
Detailed description of the invention
Fig. 1 is the utility model intramedullary nail structural schematic diagram.
Fig. 2 is the utility model locking self-locking nail structural schematic diagram.
Fig. 3 is the non-locking self-locking nail structural schematic diagram of the utility model.
Fig. 4 is that the utility model uses structural schematic diagram.
Description of symbols: 1, intramedullary nail；1-1, circular body；1-2, threaded hole；2, self-locking nail；2-1, locking interlocking
Nail；2-11, rear threads；2-12, middle part screw thread；2-13, front threads；2-2, non-locking self-locking nail；2-21, rear portion are fixed
Portion；2-22, front middle part fixed part.
Specific embodiment
As shown in Figs 1-4, a kind of intramedullary nail with locking steel plate effect, including intramedullary nail 1 and be set on intramedullary nail 1
Self-locking nail 2, cross one another connection between the intramedullary nail 1 and self-locking nail 2, and shape is integral；
The intramedullary nail 1 includes circular body 1-1 and threaded hole 1-2；The circular body 1-1 is equipped with several uniform points
The locking screw thread hole 1-2 of cloth；
The self-locking nail 2 is locking self-locking nail 2-1 or non-locking self-locking nail 2-2.
The locking self-locking nail 2-1 includes front threads 2-11, middle part screw thread 2-12 and rear threads 2-13；The middle part
The diameter of screw thread 2-12 is greater than front threads 2-11, and the diameter of rear threads 2-11 is greater than middle part screw thread 2-12.
The non-locking self-locking nail 2-2 includes front middle part fixed part 2-22 and rear portion fixed part 2-21；The front middle part is solid
It is non-threaded to determine portion 2-22, rear portion fixed part 2-21 has screw thread, and the diameter of front middle part fixed part 2-22 is less than rear portion fixed part 2-21.
The threaded hole 1-2 is uniformly distributed on the center and both ends of circular body 1-1, in the hat of circular body 1-1
Shape face and sagittal plane cross-distribution, the diameter and 2 matches mutually of self-locking nail of threaded hole 1-2.
The screw pitch of the middle part screw thread 2-12 of the locking self-locking nail 2-1 and the screw pitch and diameter phase of diameter and threaded hole 1-2
It coincide, forms locking and fix, front threads 2-11 is fixed with contralateral cortex bone screw, rear threads 2-13 and nearside cortex bone
Screw hole is fixed.
The non-locking connection of the front middle part fixed part 2-22 and intramedullary nail of the non-locking self-locking nail 2-2 has gap, and rear portion is solid
Determine portion 2-21 to fix with nearside cortical screw hole.
The intramedullary nail 1 and self-locking nail 2 are titanium alloy material.
When the utility model is used, between intramedullary nail 1 and self-locking nail 2 connection by sighting device complete, locking of intramedullary nails with take aim at
Quasi- device is connected, and each screw pit position is positioned under sighting device, and selection needs to be implanted into the threaded hole of self-locking nail as the case may be
Position appears separation as small notch, is placed in sleeve bench drill head, whether correct using C-arm X-ray machine perspective position, position is correct
Afterwards, sky is bored with electric drill, the self-locking nail of appropriate length is selected to be screwed into fixation.Generally 2 are proximally and distally respectively being used close to fracture
Piece self-locking nail is fixed.
The threaded locking self-locking nail 2-1 in center, the fixed function of existing Common intramedullary nail, and have locking steel plate
Fixed function enables intramedullary nail to provide absolute fixed effect to fracture end.The non-threaded non-locking interlocking in center
2-2 is followed closely, the fixed function of Common intramedullary nail is played, intramedullary nail provides relative stability fixed effect to fracture end.
1 diameter of intramedullary nail is different in different parts bone diameter as Common intramedullary nail, has diameter 6-14mm not
Same specification；Threaded hole 1-2 screw thread on intramedullary nail 1 is as the threaded hole on locking steel plate, screw pitch 0.4-0.5mm or so, altogether
8-12 threaded hole is evenly distributed on the both ends of intramedullary nail 1 and the coronal-plane of center portion and sagittal plane.
When the utility model is used, according to the different state of an illness and patient's different phase selection locking self-locking nail 2-1 or non-locking
Self-locking nail 2-2 is connected and fixed, and provides absolute stability or metastable fixed effect to bone stump.
Such as use process in comminuted tibial early stage or larger nearly setting board of skeleton end fracture pulp cavity side: due to fracture end
Very unstable, bone stump needs absolute, and just selection locking self-locking nail 2-1, generally respectively makes close to the far and near end of fracture
It is fixed with 2 pieces of locking self-locking nail 2-1, so, leans on locking screw thread hole and screw thread between intramedullary nail 1 and locking self-locking nail 2-1
Locking connection, while the front and rear of the cortical bone and self-locking nail of opposite side and nearside is fixedly secured, fracture end without any fine motion,
Be conducive to early stage formation poroma connection in this way, therefore be conducive to union；When there is poroma connection or two sides pulp cavity is homogeneous
When close, i.e. when the fixed effect of the main nail of intramedullary nail itself is preferable, it being changed to or selects non-locking self-locking nail 2-2, fracture end has fine motion,
Relative stability is provided, is conducive to stimulate union in this way.
The use process that the cross locking marrow nail is fractured in shin bone multistage: due to fracture end, especially center fracture pole
Unstable, bone stump needs absolute, just selection locking self-locking nail 2-1, is generally leaning on most proximal end, distalmost end and intermedium
Trisection is respectively fixed using 2 pieces of locking self-locking nail 2-1, so, leans on locking screw thread between intramedullary nail 1 and locking self-locking nail 2-1
Hole and screw thread locking connection, while the front and rear of the cortical bone and self-locking nail of opposite side and nearside is fixedly secured, all fracture
End is conducive to early stage formation poroma connection in this way, therefore is conducive to union without any fine motion.
Claims (7)
1. a kind of intramedullary nail with locking steel plate effect, it is characterized in that: including intramedullary nail (1) and being set on intramedullary nail (1)
Self-locking nail (2), cross one another and connect between the intramedullary nail (1) and self-locking nail (2), shape is integral；
The intramedullary nail (1) includes circular body (1-1) and threaded hole (1-2)；The circular body (1-1) is equipped with several equal
The locking screw thread hole (1-2) of even distribution；
The self-locking nail (2) is locking self-locking nail (2-1) or non-locking self-locking nail (2-2).
2. as described in claim 1 with the intramedullary nail of locking steel plate effect, it is characterized in that: the locking self-locking nail (2-1) is wrapped
Include front threads (2-13), middle part screw thread (2-12) and rear threads (2-11)；The diameter of the middle part screw thread (2-12) is greater than
The diameter of front threads (2-13), rear threads (2-11) is greater than middle part screw thread (2-12).
3. as described in claim 1 with the intramedullary nail of locking steel plate effect, it is characterized in that: the non-locking self-locking nail (2-2)
Including front middle part fixed part (2-22) and rear portion fixed part (2-21)；The front middle part fixed part (2-22) is non-threaded, and rear portion is solid
Determining portion (2-21) has screw thread, and the diameter of front middle part fixed part (2-22) is less than rear portion fixed part (2-21).
4. as described in claim 1 with the intramedullary nail of locking steel plate effect, it is characterized in that: the threaded hole (1-2) uniformly divides
It is distributed on the center and both ends of circular body (1-1), in the coronal-plane and sagittal plane cross-distribution of circular body (1-1), spiral shell
The diameter and self-locking nail (2) matches mutually of pit (1-2).
5. there is the intramedullary nail of locking steel plate effect as claimed in claim 2, it is characterized in that: locking self-locking nail (2-1)
The screw pitch and diameter of middle part screw thread (2-12) match with the screw pitch of threaded hole (1-2) and diameter, form locking and fix, front spiral shell
Line (2-13) is fixed with contralateral cortex bone screw, and rear threads (2-11) are fixed with nearside cortical screw hole.
6. as claimed in claim 3 with the intramedullary nail of locking steel plate effect, it is characterized in that: the non-locking self-locking nail (2-2)
Front middle part fixed part (2-22) and the non-locking connection of intramedullary nail, have a gap, rear portion fixed part (2-21) and nearside cortex murices
Nail hole is fixed.
7. as described in claim 1 with the intramedullary nail of locking steel plate effect, it is characterized in that: the intramedullary nail (1) and self-locking nail
It (2) is titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820541151.1U CN209220463U (en) | 2018-04-16 | 2018-04-16 | A kind of intramedullary nail with locking steel plate effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820541151.1U CN209220463U (en) | 2018-04-16 | 2018-04-16 | A kind of intramedullary nail with locking steel plate effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209220463U true CN209220463U (en) | 2019-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820541151.1U Expired - Fee Related CN209220463U (en) | 2018-04-16 | 2018-04-16 | A kind of intramedullary nail with locking steel plate effect |
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| CN (1) | CN209220463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108433798A (en) * | 2018-04-16 | 2018-08-24 | 无锡市第九人民医院 | A kind of intramedullary nail with locking steel plate effect |
-
2018
- 2018-04-16 CN CN201820541151.1U patent/CN209220463U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108433798A (en) * | 2018-04-16 | 2018-08-24 | 无锡市第九人民医院 | A kind of intramedullary nail with locking steel plate effect |
| CN108433798B (en) * | 2018-04-16 | 2023-12-22 | 无锡市第九人民医院 | Intramedullary nail with steel plate locking effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190809 Termination date: 20200416 |
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| CF01 | Termination of patent right due to non-payment of annual fee |