CN2936183Y - Expandable cancellous bone screw - Google Patents
Expandable cancellous bone screw Download PDFInfo
- Publication number
- CN2936183Y CN2936183Y CN 200620079413 CN200620079413U CN2936183Y CN 2936183 Y CN2936183 Y CN 2936183Y CN 200620079413 CN200620079413 CN 200620079413 CN 200620079413 U CN200620079413 U CN 200620079413U CN 2936183 Y CN2936183 Y CN 2936183Y
- Authority
- CN
- China
- Prior art keywords
- duct
- screw thread
- male screw
- bolt
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 16
- 230000000295 complement effect Effects 0.000 claims description 7
- 239000011148 porous material Substances 0.000 abstract 7
- 101100532451 Rattus norvegicus Slc22a17 gene Proteins 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 16
- 206010017076 Fracture Diseases 0.000 description 15
- 210000002436 femur neck Anatomy 0.000 description 2
- 206010015079 Epiphysiolysis Diseases 0.000 description 1
- 206010016454 Femur fracture Diseases 0.000 description 1
- 206010053206 Fracture displacement Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 206010034246 Pelvic fractures Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 210000003131 sacroiliac joint Anatomy 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model discloses a new expansion spongy bone hollow bolt including an external bolt. The external bolt is a monolithic construction and one end of the external boit is the tip part and whorl is arranged on the outer wall of the tip part. The internal center of the outer bolt is the front and back pore canals of unequal diameter, the front pore canal is smaller than the back one. The tail part of the back pore canal is provided with inner whorl. The two-petal or four petals expansion clearance are made from the tip part to the axis direction of the external bolts, extending to the back of the joint of the front and back pore canal. The other side of the external bolt is sphere with a hole in the center connected with the back pore canal. An internal bolt, matched with the pore canal of the external bolt, has a tapering tip, with whorls n the tail part, an internal hexagon socket and a sharp steel needle matched with the diameter of the front pore canal of the external bolt. The utility model can enhance the stability and reliability of the stationary of fracture and reduce the incidence rate of the failure of operation.
Description
Technical field
This utility model belongs to medical apparatus, particularly a kind of new medical expanding type spongy bone hollow screw.
Background technology
Fracture of femoral neck, slipped femoral epiphysis, base of nebk ot femur fracture, fracture of the femoral condyle, fracture of the tibial plateau all belong to spongy bone position fracture, and Therapeutic Method mainly is by operation, the open reduction internal fixation of fracturing at present.In addition, the sacroiliac joint damage that causes owing to multiple reason, acetabular bone, fracture of pelvis also all are the internal fixation treatment that need undergo surgery usually.Internal fixation device mainly adopts fixedly fracture site of cancellous bone screw.But to lift constant intensity not enough because at present clinical cancellous bone screw commonly used exists, and often causes the postoperative fracture displacement, and screw loosening is deviate from, final fixing failure.Especially for clinical common old fracture of femoral neck, because there is osteoporosis in most of patients, common cancellous bone screw is difficult to reach anti-rotation, and therefore the purpose that antiskid is moving internal fixation screw often occurs and become flexible the phenomenon of deviating from.
Summary of the invention
At defective and deficiency that above-mentioned prior art exists, this utility model provides a kind of expansion type hollow cancellous bone screw, can reduce the incidence rate that cancellous bone screw is loosening even deviate from, and effectively improves in the fixed stability of cancellous bone fracture, reliability.
The technical solution of the utility model is achieved in that this utility model comprises a male screw thread, male screw thread is an overall structure, one end of male screw thread is a point, the above outer wall of point is provided with one section external screw thread, the front and back ends duct that central authorities have two sections diameters not wait in the male screw thread, the front end channel diameter is less than the diameter in duct, rear end, be provided with female thread in the afterbody of duct, rear end, evenly cut out the expansion clearance of two lobes or pintongs on the axial direction from point along male screw thread, the expansion clearance extends to after front end duct and the junction, duct, rear end; The other end of male screw thread is spherical, and middle porose, this hole is connected with the duct, rear end, an inner bolt that is complementary with the afterbody duct of male screw thread, and the point of inner bolt is taper, afterbody is provided with screw thread, and interior six side's grooves that confession is screwed into are set in the afterbody.
Front end duct and junction, duct, rear end are taper.
The one tip draw point that is complementary with the front end channel diameter of male screw thread, the diameter of tip draw point is less than the front end channel diameter.
This utility model changes the screw and the way of contact of fracture spongy bone by mechanical swelling, and the resistance to plucking that can effectively improve cancellous bone screw goes out intensity and anti-spin intensity, increases the stability and the reliability of fracture internal fixation, reduces the operative failure incidence rate.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is this utility model tip draw point structural representation;
Fig. 3 is this utility model inner bolt structural representation.
Below in conjunction with accompanying drawing structure of the present utility model is described in detail.
The specific embodiment
Shown in Fig. 1,2,3, this utility model is made up of male screw thread 1 and inner bolt 2 two parts, and male screw thread 1 one ends are point 4, and male screw thread 1 other end is spherical, after the point 4 external screw thread 5 is arranged, and external screw thread 5 is the cancellous threads of self tapping.The front and back ends duct 6,7 that central authorities in the male screw thread 1 have two sections diameters not wait.Front end duct 6 diameters are less than the diameter in duct, screw rear end 7, and 6,7 junctions, front and back ends duct are taper.Duct, rear end 7 inwalls are provided with the female thread that is complementary with inner bolt 2.At the point 4 of male screw thread 1, in axial direction go up the expansion clearance that evenly cuts out two lobes or pintongs from the tip, the expansion clearance extends to after the junction, taper duct.The other end of male screw thread 1 is spherical, and middle porose 10, this hole 10 is connected with duct, rear end 7.With the inner bolt 2 that the duct, rear end 7 of male screw thread 1 is complementary, the most advanced and sophisticated position of inner bolt 2 also is taper, and afterbody is provided with screw thread and for the interior six side's grooves 9 that are screwed into.Be furnished with a tip draw point 3 that is complementary with front end duct 6 diameters of male screw thread 1 simultaneously, the diameter of tip draw point 3 is less than the diameter in front end duct 6, and for inserting fracture in advance, fixedly fracture site use resets.
This utility model can at first be squeezed into fracture with tip draw point 3 in use, and fixedly fracture site resets temporarily; Under X line perspective, determine that the reduction of the fracture is satisfied, then male screw thread 1 is inserted in tip draw point 3, be screwed into along its direction, fixedly fracture site.Extract tip draw point 3 then out, again inner bolt 2 is inserted duct, male screw thread rear end 7, be screwed into inner bolt 2, till male screw thread point 4 expansion clearances reach expansion, the fracture site fixation.
Claims (3)
1, a kind of expanding type spongy bone hollow screw, it is characterized in that, comprise a male screw thread (1), male screw thread (1) is an overall structure, one end of male screw thread (1) is point (4), the above outer wall of point (4) is provided with one section external screw thread (5), front end duct (6) and duct, rear end (7) that the interior central authorities of male screw thread (1) have two sections diameters not wait, front end duct (6) diameter is less than the diameter of duct, rear end (7), be provided with female thread (8) in the afterbody of duct, rear end (7), along the expansion clearance that evenly cuts out two lobes or pintongs on the axial direction of male screw thread (1), the expansion clearance extends to after front end duct (6) and the junction, duct, rear end (7) from point (4); The other end of male screw thread (1) is spherical, middle porose (10), this hole (10) is connected with duct, rear end (7), one inner bolt (2) that is complementary with the afterbody duct of male screw thread (1), the point of inner bolt (2) is taper, afterbody is provided with screw thread, is provided with in the afterbody for the interior six side's grooves (9) that are screwed into.
2, expanding type spongy bone hollow screw according to claim 1 is characterized in that, front end duct (6) are taper with junction, duct, rear end (7).
3, expanding type spongy bone hollow screw according to claim 1 is characterized in that, a tip draw point (3) that is complementary with front end duct (6) diameter of male screw thread (1), and the diameter of tip draw point (3) is less than front end duct (6) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620079413 CN2936183Y (en) | 2006-07-20 | 2006-07-20 | Expandable cancellous bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620079413 CN2936183Y (en) | 2006-07-20 | 2006-07-20 | Expandable cancellous bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2936183Y true CN2936183Y (en) | 2007-08-22 |
Family
ID=38360202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620079413 Expired - Lifetime CN2936183Y (en) | 2006-07-20 | 2006-07-20 | Expandable cancellous bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2936183Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102920501A (en) * | 2012-11-30 | 2013-02-13 | 毕思维 | Metal bone fracture plate with stress dispersing structure |
| CN103519880A (en) * | 2013-10-09 | 2014-01-22 | 中国人民解放军第四军医大学 | Double-expansion hollow compression screw |
| CN103610490A (en) * | 2013-12-18 | 2014-03-05 | 刘杰 | Pressurized intramedullary expanding interlocking screw and manufacturing method thereof |
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
| CN106361421A (en) * | 2016-08-30 | 2017-02-01 | 李志强 | Olecranal fracture fixator |
-
2006
- 2006-07-20 CN CN 200620079413 patent/CN2936183Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102920501A (en) * | 2012-11-30 | 2013-02-13 | 毕思维 | Metal bone fracture plate with stress dispersing structure |
| CN102920501B (en) * | 2012-11-30 | 2015-04-15 | 毕思维 | Metal bone fracture plate with stress dispersing structure |
| CN103519880A (en) * | 2013-10-09 | 2014-01-22 | 中国人民解放军第四军医大学 | Double-expansion hollow compression screw |
| CN103610490A (en) * | 2013-12-18 | 2014-03-05 | 刘杰 | Pressurized intramedullary expanding interlocking screw and manufacturing method thereof |
| CN103860252A (en) * | 2014-03-07 | 2014-06-18 | 中国人民解放军第四军医大学 | Medical anchor type cancellous bone screw |
| CN106361421A (en) * | 2016-08-30 | 2017-02-01 | 李志强 | Olecranal fracture fixator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070822 |
|
| EXPY | Termination of patent right or utility model |