CN2766794Y - Extraperiosteal bridge type arc bone fracture plate - Google Patents
Extraperiosteal bridge type arc bone fracture plate Download PDFInfo
- Publication number
- CN2766794Y CN2766794Y CN 200420069231 CN200420069231U CN2766794Y CN 2766794 Y CN2766794 Y CN 2766794Y CN 200420069231 CN200420069231 CN 200420069231 CN 200420069231 U CN200420069231 U CN 200420069231U CN 2766794 Y CN2766794 Y CN 2766794Y
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- steel plate
- screw
- plate
- screw rod
- utility
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Abstract
The utility model relates to a periosteal bridge type arc-shaped bone fracture plate which comprises a fixed steel plate, a screw rod and a screw cap. The utility model is characterized in that the fixed steel plate is an arc-shaped plate, and a sinker screw hole is arranged on the arc-shaped plate; the upper and the lower parts of the screw rod are provided with screw threads; the lower end of the screw thread section at the upper part is provided with a protruding steel plate supporting platform which is equivalent to a non-contact steel plate; when the utility model is operated, the bone fracture end is fixed by the screw rod firstly, the steel plate is sheathed on the screw rod supporting platform, and then, the screw cap is tightly screwed to fix the steel plate; the fixed steel plate is designed into the arc-shaped plate, the stress distribution of the bone end is even, and a screw of the steel plate is not easy to break; the supporting platform on the screw rod enables the steel plate not to contact the bone face and not to strip or strip less periost, injury is less, and the cicatrization speed of fracture is accelerated; the steel plate can be arranged at different space outside the periost, in case the steel plate is arranged outside skin, the steel plate is equivalent to external fixation, and in case the steel plate is arranged under the skin, under fascia and at a gap of muscles, the steel plate is equivalent to internal fixation. The utility model has the advantages of reliable fixation and low expense.
Description
Technical field
This utility model relates to a kind of clinical orthopaedics fixation device, the outer arc blade plate of bridge-type of particularly a kind of periosteum.
Background technology
At present, the orthopaedics internal fixation mainly is to use straight steel plate and the screw of being close to surface of bone, need peel off more periosteum, influencing fracture end blood supplies, healing rate, the suffered shear stress of screw, the suffered screw traction force in steel plate middle part is big, when before union of fracture, bearing a heavy burden, steel plate, screw is easy to fatigue break, and when pressurizeing with forcing screw, the suffered stress of fracture end is asymmetric, be that steel plate is little to lateral pressure, when application single armed external fixator adds press fit, this asymmetric more obvious, its offside even produce tensile stress and cause fracture delayed union or disunion, straight steel plate also has certain stress-shielding effect, makes that the epiphysis stress distribution is inhomogeneous, influences union of fracture.In recent years,, straight steel plate shape has been done some improvement, steel plate, corrugated sheet steel etc. have occurred a little contacting, but still need peel off more periosteum in biology of pay attention to promoting the confession of protection epiphysis blood under the technique for fixing situation.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned weak point, and provide that a kind of wound is little, easy and simple to handle, the epiphysis stress distribution evenly, fixing reliable, union of fracture is fast, the outer arc blade plate of bridge-type of the periosteum that expense is low.
The purpose of this utility model is achieved in that the outer arc blade plate of bridge-type of periosteum comprises fixation steel plate, screw rod, nut, it is characterized in that fixation steel plate is a cambered plate, the countersunk head screw is arranged above, and there is screw thread the screw rod upper and lower part, and there is an outstanding steel plate support platform thread segment lower end, top.
During operation, earlier with the fixing fracture end of screw rod, be inserted in steel plate again on the screw rod support platform, tightening nuts is fixed.Fixation steel plate is designed to cambered plate, the active force that the two ends screw produces is a tensile stress at fracture end steel plate nearside, can offset the compressive stress of the middle forcing screw of part, at offside then is compressive stress, so two lateral stresses tend to balance, make the epiphysis stress distribution more even, and arc steel plate has certain elastic deformation when being subjected to bearing a heavy burden stress, can make fracture end be subjected to certain stress stimulation and promote union of fracture.Because form the arm of force by screw between steel plate and surface of bone, the suffered stress of screw shear stress and steel plate all reduces, steel plate screw is frangibility not.Support platform on the screw rod makes steel plate not contact surface of bone, so can not peel off or peel off periosteum less, wound is little, accelerating bone healing speed.Nut is tightened screw rod in the countersunk head screw after screw and steel plate are combined together, increased constant intensity, reduced the shear stress of screw.Because of used steel plate, screw all should take out, and standing time is short, and the material biocompatibility requirement is relatively low, gets final product with stainless steel material, and expense is low.The outer arbitrary spaces of periosteum such as steel plate can place under spatium intermusculare, the fascia, subcutaneous and skin is outer.Place skin promptly to be equivalent to external fixation outward, generally be suitable for showing shallow skeleton such as tibia, ulna, rib etc.; Place to be internal fixation below the skin, be suitable for deeply skeleton and femur, humerus etc., be equivalent to noncontact steel plate internal fixation.
Description of drawings
Fig. 1 is a stable fracture blade plate structural representation;
Fig. 2 is a unstable fracture blade plate structural representation;
Fig. 3 is stable type tubule shape fracture blade plate structural representation;
Fig. 4 is instability mode tubule shape fracture blade plate structural representation;
Fig. 5 is the bolt structure sketch map.
The specific embodiment
Now illustrated embodiment is made detailed description to this utility model in conjunction with the accompanying drawings.
Embodiment 1: as shown in Figure 1, fixation steel plate 1 middle part of stable fracture blade plate raise up bend to arc, four countersunk head screws 2 are arranged above, two are the pressurization screw wherein, two at two ends are the screw that oppositely pressurizes, the counterbore height is with nut 3 thickness, and the thread segment length of screw rod 4 upper support platforms more than 5 is no more than steel plate 1 thickness, and present embodiment is chosen both and equated.This blade plate is suitable for non-heavy burden bone and stable fracture is used.
Embodiment 2: as shown in Figure 2, fixation steel plate 6 middle parts of unstable fracture blade plate raise up and bend to arcly, and upwards lift up at two ends, and six countersunk head screws 2 are arranged above, two screws that wherein lifting up part on two ends increases are non-pressurised screw, only for strengthening its stability.This blade plate is suitable for using at main heavy burden long bone such as femur, tibia and unstable fracture.
Embodiment 3: as shown in Figure 3, fixation steel plate 7 middle parts of stable type tubule shape fracture blade plate raise up and bend to arcly, and two countersunk head screws 2 are arranged above.This blade plate both can be done internal fixation, also can do external fixation such as rib, pubic symphysis, metacarpal bone, metatarsal.
Embodiment 4: as shown in Figure 4, fixation steel plate 8 middle parts of instability mode tubule shape fracture blade plate are recessed to be bent to arcly, and three countersunk head screws 2 are arranged above.
Claims (2)
1, the outer arc blade plate of bridge-type of a kind of periosteum, comprise fixation steel plate (1), screw rod (4), nut (3), it is characterized in that fixation steel plate (1) is a cambered plate, countersunk head screw (2) is arranged above, there is screw thread screw rod (4) upper and lower part, and there is an outstanding steel plate support platform (5) thread segment lower end, top.
2, the outer arc blade plate of bridge-type of periosteum as claimed in claim 1 is characterized in that the same nut of counterbore height (3) thickness of described countersunk head screw (2), and the above thread segment length of screw rod (4) upper support platform (5) is no more than steel plate (1) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069231 CN2766794Y (en) | 2004-11-19 | 2004-11-19 | Extraperiosteal bridge type arc bone fracture plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420069231 CN2766794Y (en) | 2004-11-19 | 2004-11-19 | Extraperiosteal bridge type arc bone fracture plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2766794Y true CN2766794Y (en) | 2006-03-29 |
Family
ID=36680654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420069231 Expired - Fee Related CN2766794Y (en) | 2004-11-19 | 2004-11-19 | Extraperiosteal bridge type arc bone fracture plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2766794Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939900A (en) * | 2015-07-24 | 2015-09-30 | 青岛大学附属医院 | Medical slight contact type plate screw system |
-
2004
- 2004-11-19 CN CN 200420069231 patent/CN2766794Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939900A (en) * | 2015-07-24 | 2015-09-30 | 青岛大学附属医院 | Medical slight contact type plate screw system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |