CN105769313A - Inner core inserting type expansion screw and use method thereof - Google Patents
Inner core inserting type expansion screw and use method thereof Download PDFInfo
- Publication number
- CN105769313A CN105769313A CN201610172441.9A CN201610172441A CN105769313A CN 105769313 A CN105769313 A CN 105769313A CN 201610172441 A CN201610172441 A CN 201610172441A CN 105769313 A CN105769313 A CN 105769313A
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- China
- Prior art keywords
- expansion
- screw body
- inner core
- lock nut
- screw
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Classifications
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- 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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from bone
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
-
- 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
- A61B2017/564—Methods for bone or joint treatment
-
- 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
- A61B2017/681—Alignment, compression, or distraction mechanisms
-
- 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Abstract
The invention provides an inner core inserting type expansion screw. The inner core inserting type expansion screw comprises a screw body, wherein an expansion inner core is arranged in the screw body, a through side slit is arranged at the lower part, a pushing and locking nut is arranged at the top, and the lower end of the expansion inner core extends from the side slit of the screw body. The invention further provides a use method of the expansion screw. The expansion degrees of expansion arms can be controlled by controlling the pushing distance of the pushing and locking nut. When the expansion screw is used for bone fixation for symptoms of pathological bone density reduction and osteoporosis and fixation of soft tissue and bones, the fixation area can be increased, the range of a bone trabecular can be controlled, the fixation strength can be improved, and the screw retreating, breakage and fixation failure occurrence rate can be reduced or eliminated. Further, the expansion inner core, the pushing and locking nut and the screw body are arranged in a non-fixed manner, thereby being conveniently taken out of a body after fixation; the structure is simple, the practicability is high and the operation is easy.
Description
Technical field
The invention belongs to technical field of medical instruments, relate to Bone Defect Repari reconstruction technique field, particularly a kind of insertion belly core expansion bolt and using method thereof.
Background technology
Process fracture clinically, carry out the fixing of osteotomy, soft tissue and bone, or other are when needing sclerotin is fixed, requirement to the fixing intensity of inside-fixture is can obtain enough stability for principle, to the normal sclerotin of the parameters such as bone density, plain screw can reach to meet fixing intensity and the hold of requirement.For old people with the osteoporotic situation of degeneration, or require that early stage undertakes heavy burden, or when there is the situations such as excessive, the pathologic osteoporosis of body weight, the common cancellous bone screw or the os integumentale screw that use clinically at present are to obtain enough solid mechanical intensity, screw extraction usually occur, loosen, deviate from or sclerotin displacement, fix the complication such as unsuccessfully.Accordingly, it would be desirable to one can increase fixing intensity and fixed-area, it is prevented that occur that the screw of nail road complication occurs, in order to meet the mechanical environment demand required for union of fracture, soft tissue healing.
Summary of the invention
The invention aims in special sclerotin situation, meet the fixing requirement of sclerotin, and improve the fixing intensity of screw, lowering fixes unsuccessfully, screw loosening, deviate from, the technical problem of fracture complication, such as osteoporosis, pathologic bone mineral density loss, soft tissue and bone fixing, early loading demand, and a kind of belly core expansion bolt and using method thereof inserted is provided, this insertion belly core expansion bolt can provide holding more sclerotin, increase fixed-area, improve fixing intensity, prevent screw displacement from deviating from, lock nut is advanced to control the degrees of expansion of expansion inner core by rotating, and prevent expansion inner core from falling back.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of insertion belly core expansion bolt, including screw body, is provided with expansion inner core inside described screw body, the latasuture that bottom is provided with through, top is provided with propelling lock nut, and under the promotion of described propelling lock nut, the lower end of described expansion inner core is stretched out by the latasuture of described screw body.
Insertion belly core expansion bolt as above,
Described screw body, is used for being screwed into sclerotin, and described screw body is with external screw thread, and upper end is body, and in upper pipes body, wall portion is with female thread, and the near middle of inboard wall of tube body is provided with circumferential groove, and described latasuture is positioned at the lower section of described groove；
Described expansion inner core, inserts in described screw body upper pipes body, and upper end is apical ring, and lower end is multiple discrete expansion arm；
Described propelling lock nut, is used for advancing and lock described expansion inner core, and including head, base station and end stake that external diameter is sequentially reduced, described base station is provided with external screw thread, and matches with the female thread on described screw body inboard wall of tube body；The stake of the described end is inserted in the apical ring of described expansion inner core.
Insertion belly core expansion bolt as above, also includes stopping snap ring, described stop snap ring external diameter is identical with screw body upper end external diameter, is placed between described propelling lock nut base station and screw body, it is prevented that base station sinks to inside screw body.
The belly core expansion bolt that inserts as above, described screw body, propelling lock nut, expansion inner core and stop snap ring independently molding.
Insertion belly core expansion bolt as above, described expansion inner core is made for having certain elastic metal, and multiple expansion arm of described expansion inner core are prefabricated into the scope of opening more than screw body diameter.
Insertion belly core expansion bolt as above, the lower end of described expansion arm is most advanced and sophisticated, and point is flared out into divergence form.
Insertion belly core expansion bolt as above, the plurality of expansion arm is shunk in the body being contained in described screw body, and the tip of expansion arm is placed in described groove.
Insertion belly core expansion bolt as above, the apical ring of described expansion inner core is concordant with screw body upper surface, between described stop snap ring and propelling lock nut base station, and contacts with advancing lock nut base station lower surface.
Insertion belly core expansion bolt as above, the head of described propelling lock nut is with the depression inserted for screwdriver head, described end stake smooth outer surface.
The using method inserting belly core expansion bolt as above, it comprises the following steps:
Original state, puts into the body of screw body by expansion inner core, then by stopping that snap ring is installed on the apical ring of expansion inner core, then lays propelling lock nut again so that advance the end stake of lock nut to insert in the apical ring of described expansion inner core；
Use state, first screw body is screwed into sclerotin, then will stop that snap ring is removed, propelling lock nut is first pushed screw body tube chamber one segment distance again, the expansion arm making expansion inner core arrives screw body latasuture top, again screwdriver is inserted in the depression advancing lock nut head, rotation is screwed into propelling lock nut, base station external screw thread is made to be engaged with screw body body female thread, in progradation, expansion arm point opens from screw body latasuture gradually and stretches out outside, by controlling the stretching degree advancing the advance distance of lock nut can control expansion arm, and base station external screw thread prevents expansion inner core from falling back with being engaged of screw body body female thread.
Compared with prior art, advantages of the present invention and having the benefit effect that
The present invention inserts belly core expansion bolt simple structure, practical, it is easy to operation.Bone for process pathologic bone mineral density loss, physiological patients with osteoporosis is fixed, and during soft tissue and sclerotin fixing, raising fixed-area and the bone trabecular scope of holding can be played, increase fixing intensity, reduce or eliminate screw and exit, rupture, fix failed incidence rate.And in the process advancing lock nut to screw in, control the stretching degree advancing the advance distance of lock nut can control expansion arm, and base station external screw thread is possible to prevent expansion inner core to fall back with being engaged of body near-end female thread.Further, between expansion inner core and propelling lock nut and screw body, right and wrong are fixed, it is simple to from internal taking-up after fixing end.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the overall structure perspective view of insertion belly core expansion bolt specific embodiment of the present invention；
Fig. 2 is the structural representation of screw body；
Fig. 3 is the structural representation of expansion inner core；
Fig. 4 is the structural representation advancing lock nut；
Fig. 5 is the structural representation stopping snap ring.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further detailed explanation.Should be appreciated that embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
With reference to shown in Fig. 1-5, this embodiment is a kind of insertion belly core expansion bolt, including screw body 10, expansion inner core 20, propelling lock nut 30, stops snap ring 40.
Screw body 10, is used for being screwed into sclerotin, and screw body 10 is with external screw thread 11, upper end is body 12, in upper pipes body, wall portion is with female thread 13, and the near middle of body 12 inwall is provided with the groove 14 of circumferential partial-length, groove 14 be connected with through multiple latasutures 15；
Expansion inner core 20, inserts in screw body 10 upper end body 12, and upper end is apical ring 21, and lower end is multiple discrete expansion arm 22；Expansion inner core 20 generally has certain elastic metal and makes, and multiple expansion arm 22 are prefabricated into the scope of opening more than screw body 10 diameter, and shrink in the body 12 being contained in screw body 10.The lower end of expansion arm 22 is most advanced and sophisticated, and point is flared out into divergence form, and the point of expansion arm 22 is placed in groove 14.The apical ring 21 of expansion inner core 20 is concordant with screw body 10 upper surface, is stopping between snap ring 40 and the base station 32 advancing lock nut 30, and is contacting with base station 32 lower surface advancing lock nut 30.
Advancing lock nut 30, be placed in screw body 10 top, for advancing and lock expansion inner core 20, including head 31, base station 32 and end stake 33 that external diameter is sequentially reduced, base station 32 is provided with external screw thread 34, and matches with the female thread 13 on screw body 10 inboard wall of tube body；End stake 33 is inserted in the apical ring 21 of expansion inner core 20.Under the promotion advancing lock nut 30, the point of expansion inner core 20 lower end is stretched out by the latasuture 15 of screw body 10.
Stop snap ring 40, be placed between base station 32 and the screw body 10 advancing lock nut 30, it is prevented that it is internal that base station 32 sinks to screw body 10, stop that snap ring 40 external diameter is identical with screw body 10 upper end external diameter.Stop that snap ring 40 has breach 41, it is simple to snap in and remove.
In above-described embodiment, screw body 10, expansion inner core 20, propelling lock nut 30, stop snap ring 40 independently molding.Expanding inner core 20, advancing between lock nut 30 and screw body 10 is free-standing, it is simple to from internal taking-up after fixing end.
In the present embodiment, for the ease of being screwed into propelling lock nut 30, advance the head 31 of lock nut 30 with the depression 35 inserted for screwdriver head, end stake 33 smooth outer surface.
In above-described embodiment, multiple expansion arm 22 of expansion inner core 20, according to intending tensile strength, expansion arm 22 is prefabricated into the scope of opening more than screw body 10 diameter, and is contained in the body of screw body 10, expansion arm 22 tip of expansion inner core 20 is placed in groove 14.
The using method of above-mentioned insertion belly core expansion bolt, it comprises the following steps:
Original state, expansion inner core 0 is put into the body 12 of screw body 10, then by stopping that snap ring 40 is installed on the apical ring 21 of expansion inner core 20, propelling lock nut 30 is then laid again so that advance the end stake 33 of lock nut 30 to insert in the apical ring 21 of expansion inner core 20；
First screw body 10 is screwed into sclerotin during use, then stop snap ring 40 is removed, propelling lock nut 30 is first pushed screw body 10 tube chamber one segment distance again, the expansion arm 22 making expansion inner core 20 arrives screw body 10 latasuture top, again screwdriver is inserted in the depression 35 advancing lock nut 30 head, rotation is screwed into propelling lock nut 30, makes base station external screw thread 34 be engaged with screw body near-end female thread 13.In progradation, expansion arm 22 is opened from screw body 10 latasuture 15 gradually and is stretched out, by controlling the stretching degree advancing the advance distance of lock nut 30 can control expansion arm 22, and base station external screw thread 34 is possible to prevent expansion inner core 20 to fall back with being engaged of body near-end female thread 13.
The present invention is by controlling the stretching degree advancing the advance distance of lock nut can control expansion arm, and expansion arm is stretched out by screw body latasuture, is more beneficial for grip tightly fixing bone trabecula and soft tissue.And expand inner core and advance right and wrong between lock nut and screw body fixed, it is simple to from internal taking-up after fixing end, simple structure, practical, it is easy to operation.The present invention fixes for the bone of pathologic bone mineral density loss, osteoporosis, and during soft tissue and bone fixing, can improve fixed-area and hold bone trabecular scope, increasing fixing intensity, reducing or eliminate screw and exit, rupture, fix unsuccessfully incidence rate.
Certainly, last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. one kind is inserted belly core expansion bolt, including screw body, it is characterized in that: inside described screw body, be provided with expansion inner core, the latasuture that bottom is provided with through, top is provided with propelling lock nut, under the promotion of described propelling lock nut, the lower end of described expansion inner core is stretched out by the latasuture of described screw body.
2. insert belly core expansion bolt according to claim 1, it is characterised in that:
Described screw body, is used for being screwed into sclerotin, and described screw body is with external screw thread, and upper end is body, and in upper pipes body, wall portion is with female thread, and the near middle of inboard wall of tube body is provided with circumferential groove, and described latasuture is positioned at the lower section of described groove；
Described expansion inner core, inserts in described screw body upper pipes body, and upper end is apical ring, and lower end is multiple discrete expansion arm；
Described propelling lock nut, is used for advancing and lock described expansion inner core, and including head, base station and end stake that external diameter is sequentially reduced, described base station is provided with external screw thread, and matches with the female thread on described screw body inboard wall of tube body；The stake of the described end is inserted in the apical ring of described expansion inner core.
3. insert belly core expansion bolt according to claim 2, it is characterized in that: also include stopping snap ring, described stop snap ring external diameter is identical with screw body upper end external diameter, is placed between described propelling lock nut base station and screw body, it is prevented that base station sinks to inside screw body.
4. insert belly core expansion bolt according to claim 3, it is characterised in that: described screw body, propelling lock nut, expansion inner core and stop snap ring independently molding.
5. insert belly core expansion bolt according to claim 2, it is characterised in that: described expansion inner core is made for having certain elastic metal, and multiple expansion arm of described expansion inner core are prefabricated into the scope of opening more than screw body diameter.
6. insert belly core expansion bolt according to claim 5, it is characterised in that: the lower end of described expansion arm is most advanced and sophisticated, and point is flared out into divergence form.
7. insert belly core expansion bolt according to claim 6, it is characterised in that: the plurality of expansion arm is shunk in the body being contained in described screw body, and the tip of expansion arm is placed in described groove.
8. insert belly core expansion bolt according to claim 3, it is characterised in that: the apical ring of described expansion inner core is concordant with screw body upper surface, between described stop snap ring and propelling lock nut base station, and contacts with advancing lock nut base station lower surface.
9. insert belly core expansion bolt according to claim 2, it is characterised in that: the head of described propelling lock nut is with the depression inserted for screwdriver head, described end stake smooth outer surface.
10. according to any one of a claim 1-9, insert the using method of belly core expansion bolt, it is characterized in that comprising the following steps: during use, first screw body is screwed into sclerotin, then will stop that snap ring is removed, propelling lock nut is first pushed screw body tube chamber one segment distance again, the expansion arm making expansion inner core arrives screw body latasuture top, again screwdriver is inserted in the depression advancing lock nut head, rotation is screwed into propelling lock nut, base station external screw thread is made to be engaged with screw body body female thread, in progradation, expansion arm is opened from screw body latasuture gradually and is stretched out, by controlling the stretching degree advancing the advance distance of lock nut can control expansion arm, and base station external screw thread prevents expansion inner core from falling back with being engaged of screw body body female thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172441.9A CN105769313B (en) | 2016-03-24 | 2016-03-24 | A kind of insertion belly core expansion bolt and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172441.9A CN105769313B (en) | 2016-03-24 | 2016-03-24 | A kind of insertion belly core expansion bolt and its application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105769313A true CN105769313A (en) | 2016-07-20 |
| CN105769313B CN105769313B (en) | 2019-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610172441.9A Active CN105769313B (en) | 2016-03-24 | 2016-03-24 | A kind of insertion belly core expansion bolt and its application method |
Country Status (1)
| Country | Link |
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| CN (1) | CN105769313B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106420032A (en) * | 2016-08-31 | 2017-02-22 | 苏州西脉新诚生物科技有限公司 | Multi-pin fastened bone screw |
| US10743926B2 (en) | 2018-12-20 | 2020-08-18 | Industrial Technology Research Institute | Osteo-implant |
| CN112155701A (en) * | 2020-10-10 | 2021-01-01 | 江山市人民医院 | Adjustable screw for calcaneus |
-
2016
- 2016-03-24 CN CN201610172441.9A patent/CN105769313B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106420032A (en) * | 2016-08-31 | 2017-02-22 | 苏州西脉新诚生物科技有限公司 | Multi-pin fastened bone screw |
| CN106420032B (en) * | 2016-08-31 | 2019-07-26 | 苏州西脉新诚生物科技有限公司 | A kind of multiway fastening bone screws |
| US10743926B2 (en) | 2018-12-20 | 2020-08-18 | Industrial Technology Research Institute | Osteo-implant |
| CN112155701A (en) * | 2020-10-10 | 2021-01-01 | 江山市人民医院 | Adjustable screw for calcaneus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105769313B (en) | 2019-05-10 |
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Effective date of registration: 20220221 Address after: No.23, Lane 3399, Kangxin highway, Pudong New Area, Shanghai, 201314 Patentee after: SHANGHAI LONGHUI MEDICAL TECHNOLOGY Co.,Ltd. Address before: 266003 joint surgery, Affiliated Hospital of Qiingdao University, 59 Haier Road, Laoshan District, Qingdao, Shandong Patentee before: THE AFFILIATED HOSPITAL OF QINGDAO University |