CN205458989U - Can promote three -dimensional cross -linked structure fixing device in marrow of union - Google Patents

Abstract

The utility model provides a can promote three -dimensional cross -linked structure fixing device in marrow of union, belongs to orthopedic medical equipment technical field for fix and promote the healing the fracture. Its technical scheme is: the utility model discloses a cylinder or oval barrel, the barrel is formed by the combination of a plurality of hollow long tubes, has the crosslinked hole on the pipe wall of each long tube, and the crosslinked hole between the adjacent long tube pipe wall is linked together. This kind of structure can make the whole elastic modulus of barrel better, and internal fixation intensity obtains the reinforcing, can prevent the condition of fracture, the rupture of stress nature etc. Simultaneously, the permissible bone trabecula of this kind of structure is grown into along the space connection of stand between the short barrel and pull rod, reaches the inside and outside poroma of marrow and grows simultaneously, shortens the union time, reduces the various complication of fracture and operation. The utility model discloses an accord with the three -dimensional cross -linked structure of skeleton anatomical structure and biomechanics structural characteristic more, the conduction and the load characteristics that make the fracture resume to follow fracture self can reach satisfied treatment.

Description

3 D cross-linked structure fixing device in a kind of marrow that can promote union of fracture

Technical field

This utility model relates to a kind of Medullary fixation device being fixed fracture and promote healing, belongs to orthopedic medical device technical field.

Background technology

Long bone fracture is clinical common fracture, fixing in existing many employing open reduction Plate internal fixiation and intramedullary pin.Traditional Plate internal fixiation long incision, wound are big, needing incised tissue to appear fracture area in treatment, then carry out reduction fixation, this method is big to the soft tissue injury around fracture, intraoperative hemorrhage is many, Accessory injury is many, also needing secondary to take out, patient's postoperative recovery time is long.Fix needs in intramedullary pin and carry out expanding marrow, bring the corresponding complication expanding marrow, such as fat embolism match, pulmonary infarction etc. accordingly.More common impact is, fracture inside-fixture insert after due to the volume occupation time process of inner matter, destroy broken ends of fractured bone bone trabecula, affect the bone trabecular growth of two broken ends of fractured bone and successional recovery.In skeleton, bone trabecula has important function, and it connects surrounding bone cortex, strengthens skeleton bulk strength；Additionally, it constitutes important mechanotransduction and transformation function in pulp cavity, stress can be made when cortical bone bears various load more to equalize, rationally, and local excessive loads is conducted, is dispersed to other positions.As a example by near end of thighbone, there is about 110 °～the collodiaphyseal angle of 140 ° between neck of femur and femoral shaft, between neck of femur axis and femur two condyle, line forms anteversion of femoral neck, and therefore neck of femur bears pressure, tension force and shearing.The shelf structure that spreads out having compression trabeculae and tension force bone trabecula system to constitute in neck of femur, converts its moment of flexure born and moment of torsion and conducts to key, disperseing local stress, reduce risk of bone fracture；If there is not such shelf structure that spreads out near end of thighbone, when femoral shaft neck of femur under violence effect can bear bigger moment of flexure and moment of torsion, and the risk that fracture occurs is higher.Bone trabecula can have blood fortune system in efficient recovery marrow after rebuilding, contributes to the healing of spongy bone and cortical bone.Trabecular bone structure is had no progeny as do not recovered, inside and outside fracture healing process the marrow being invaded by pathogen, growth of spur is unbalanced, especially senile osteoporosis fracture, after the healing of possible cortical bone, spongy bone healing is poor, affect bone healing intensity and the conduction to normal duty, may sometimes result in fracture delayed union, disunion or refracture.And the proximal-distal of long bone Medullary fixation system is thicker, trabecular bone structure is destroyed more serious, inserts occupation time process and becomes apparent from, affect bone trabecula and grow into, is unfavorable for that later stage bony structures is recovered.

In fractures, it is also contemplated that and how to carry out resetting and fixing according to skeletal structure, this will directly influence the recovery degree of fracture site, become the key of operation success or failure.Skeleton is made every effort to reach the form of a kind of optimum structure, i.e. skeleton in growth course and is regulated and controled by personal activity level with material, is allowed to enough undertake mechanical load, but does not increase the burden of metabolism transhipment.According to above-mentioned principle, fracture is moulded the Changing Pattern of process again and is shown, if any displacement after fracture, will have obvious callus formation in concave side, and the direction of transfer along compressive stress is arranged by its interior bone girder, and will have the absorption of bone in convex side.

At present, fracture of femoral neck, intertrochanteric fracture, Methods for Distal Femoral Fractures, Proximal tibia fracture are clinical common injury, needing in the treatment to carry out including that Gama nail (Gamma), hollow (pulling force) screw etc. are fixing, its major complications includes that nonunion, delayed union, inside-fixture loosen, rupture.

Along with the development of orthopaedics Internal fixation technology, it is highly desirable to design new fixing device, makes fractures under the guidance of biology and biomechanical principle, make the cortex of fracture and main bone trabecula grow reconstruction, it is achieved inside and outside marrow, fracture heals simultaneously simultaneously.So meeting accelerating bone healing speed, raising healing of fracture and intensity, reduces the incidence rate of the complication such as nonunion, delayed union, loosening, the fracture of inside-fixture, to improve therapeutic effect, alleviates the misery of patient.

Utility model content

Technical problem to be solved in the utility model is 3 D cross-linked structure fixing device in being to provide a kind of marrow that can promote union of fracture, in this marrow, 3 D cross-linked structure fixing device make use of bionical interior fixing theory, fracture is made to recover to follow conduction and the load character of fracture self, it is possible to make fractures reach satisfied reset and healing effect.

The technical scheme solving above-mentioned technical problem is:

3 D cross-linked structure fixing device in a kind of marrow that can promote union of fracture, it is a cylinder or elliptical cylinder, cylinder or elliptical cylinder are upright or conformal with skeleton local curvature oblique cylinder, the two ends of cylinder are respectively upper end and lower end barrel, the middle part of cylinder is combined by multiple hollow elongated tube are the most parallel, the outer wall compact siro spinning technology of multiple long tubes, evenly distributed crosslinking hole is had on the tube wall of each long tube, crosslinking hole is vertical with the length direction of long tube, and the adjacent crosslinking hole between long tube wall is connected.

3 D cross-linked structure fixing device in the above-mentioned marrow that can promote union of fracture, described long tube is pipe or hexagon pipe, and the endoporus of long tube is circular hole or hex hole, and crosslinking hole is circular port or hex hole.

3 D cross-linked structure fixing device in the above-mentioned marrow that can promote union of fracture, there is swivelling chute the upper end of described cylinder or elliptical cylinder, and the inwall of lower end barrel has screw thread, screw thread to match with the nose threads of the handle of withdrawing device.

The beneficial effects of the utility model are:

This utility model is cylinder or elliptical cylinder, and cylinder is combined by multiple hollow elongated tube, crosslinking hole on the tube wall of each long tube, and the adjacent crosslinking hole between long tube wall is connected.This 3 D cross-linked structure adds the strength and stability of cylinder, and cylinder integral, flexible modulus can be made more preferable, and interior fixing intensity is strengthened, and is possible to prevent to occur the situation that fracture, stress fracture etc.；Meanwhile, this 3 D cross-linked structure can allow bone trabecula to grow into along the crosslinking hole between long tube, and in reaching marrow, external callus grows simultaneously, shortens healing time, recovers physiological mechanics characteristic, reduces fracture and the various complication of operation；The screw thread design of end can facilitate operating theatre staff to complete to insert and take out after union of fracture.

This utility model make use of bionical interior fixing theory, use and more conform to 3 D cross-linked structure in the Novel bionic marrow of instrument of skeleton anatomical structure and biomethanics structure characteristic, fracture is made to recover to follow conduction and the load character of fracture self, it is possible to make fractures reach satisfied reset and healing effect.

This utility model solves especially after senile osteoporosis fractures, and spongy bone healing is poor, affects bone healing intensity, sometimes may cause the hard nut to crack of fracture delayed union and refracture.

In micropore of the present utility model bionical fracture marrow, 3 D cross-linked structure fixing device is applicable to whole body long bone fracture internal fixation treatment, it is particularly suited for juxtra-articular complexity trabecular bone structure fracture, in conjunction with less invasive techniques and the support of image navigation technology, there is good expection, it is possible to obtain significantly economic and social benefit.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model；

Fig. 2 is the A-A sectional view of Fig. 1.

In figure, labelling is as follows: upper end 1, swivelling chute 2, long tube 3, crosslinking hole 4, lower end barrel 5, screw thread 6.

Detailed description of the invention

This utility model is a cylinder or elliptical cylinder, cylinder or elliptical cylinder are isometrical cylinder, the diameter of cylinder is identical with the intramedullary pin used in general operation with length, can also is that waney cylinder, cylinder is upright or conformal with skeleton local curvature oblique cylinder, can select suitable length during use according to actual needs.

Showing in figure, the two ends of cylinder are respectively upper end 1 and lower end barrel 5, and the middle part of cylinder is combined by multiple hollow elongated tube 3 are the most parallel.

Showing in figure, long tube 3 is pipe or hexagon pipe, and the endoporus of long tube 3 is circular hole or hex hole, the outer wall compact siro spinning technology composition cylinder of multiple long tubes 3 or elliptical cylinder.Such a structure increases the strength and stability of cylinder, cylinder integral, flexible modulus can be made more preferable, interior fixing intensity is strengthened, and is possible to prevent to occur the situation that fracture, stress fracture etc..

Showing there is evenly distributed crosslinking hole 4 on the tube wall of each long tube 3 in figure, crosslinking hole 4 is vertical with the length direction of long tube 3, and the adjacent crosslinking hole 4 between long tube 3 tube wall is connected.Crosslinking hole 4 is circular port or hex hole.The structure in crosslinking hole 4 can allow bone trabecula to grow into along the crosslinking hole 4 between long tube 3, and in reaching marrow, external callus grows simultaneously, shortens healing time, recovers physiological mechanics characteristic, reduces fracture and the various complication of operation.

Showing in figure, the upper end 1 of cylinder or elliptical cylinder has swivelling chute 2, the inwall of lower end barrel 5 to have screw thread 6, screw thread 6 to match with the nose threads of the handle of withdrawing device.The design of screw thread 4 can facilitate operating theatre staff to complete to insert and take out after union of fracture.

This utility model can use 3D printing technique to make or use integrally casting to complete.

This utility model make use of bionical interior fixing theory, use the Novel bionic Medullary fixation device more conforming to instrument of skeleton anatomical structure especially biomethanics structure characteristic, fracture is made to recover to follow conduction and the load character of fracture self, it is possible to make fractures reach satisfied reset and healing effect.

Claims (3)

1. 3 D cross-linked structure fixing device in the marrow that can promote union of fracture, it is characterized in that: it is a cylinder or elliptical cylinder, cylinder or elliptical cylinder are upright or conformal with skeleton local curvature oblique cylinder, the two ends of cylinder are respectively upper end (1) and lower end barrel (5), the middle part of cylinder is combined by multiple hollow elongated tube (3) are the most parallel, the outer wall compact siro spinning technology of multiple long tubes (3), evenly distributed crosslinking hole (4) is had on the tube wall of each long tube (3), crosslinking hole (4) is vertical with the length direction of long tube (3), the adjacent crosslinking hole (4) between long tube (3) tube wall is connected.

3 D cross-linked structure fixing device in the marrow that can promote union of fracture the most according to claim 1, it is characterized in that: described long tube (3) is pipe or hexagon pipe, the endoporus of long tube (3) is circular hole or hex hole, and crosslinking hole (4) is circular port or hex hole.

3 D cross-linked structure fixing device in the marrow that can promote union of fracture the most according to claim 2, it is characterized in that: there is swivelling chute (2) upper end of described cylinder or elliptical cylinder, the inwall of lower end barrel (5) has screw thread (6), screw thread (6) to match with the nose threads of the handle of withdrawing device.