A kind of anatomical form lockplate of comminuted fracture intercondylar on condyle of humerusTechnical field
The present invention relates to medical equipment technical fields, and in particular to a kind of bone plate for fracture of humerus.
Background technique
Intercondylar comminuted fracture means fracture intercondylar inside and outside distal humerus and above it on condyle of humerus, belongs in elbow jointFracture, AO parting c-type.Since this type of fracture and injury is serious, it is easy to cause ancon important blood vessels neurotrosis, and replacement and fixation is tiredDifficulty easily causes Volkmann ischemic contracture or Cubitus varus deformity when dealing with improperly.
The open reduction and Kirschner wire fixation of modern Western medicine is fixed to outside the manipulative reduction clamping plate of China's medicine, to this type fractureTreatment method is continuously improved or is improved, and the generation for endangering the severe deformities such as serious Volkmann ischemic contracture is reducedRate, but still Cubitus varus deformity constantly occurs, incidence is still higher.
In addition, intercondylar comminuted fracture on serious condyle of humerus, the degree of fracture fragmentation separation reset it can not, afterAnd it is unable to reach satisfied elbow joint function and restores.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of lockplate dedicated for humerus, which can be more preferableGround realizes that damaged bony tissues are resetted, and avoids lopsided generation.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of lockplate of comminuted fracture intercondylar on condyle of humerus, the lockplate include main body, connect with main bodyTwo flaps, the main body and flap are in Y type, and a recess is respectively arranged in two flap ends.The present invention passes through setting flapAnd recess, intercondylar crushing bone tissue on condyle of humerus can be preferably protected, and provide reset for these bone tissues crushed, determinePosition template, and then accelerate the healing of bone tissue and can be avoided bone tissue and generate deformity in agglutination.
In order to enable lockplate physically can preferably cooperate with humerus epicondyle, flap edge in the longitudinal directionCircumferential distortion, distortion angle are spent for 80 to 110, and preferably 90 degree.Distortion of the present invention is a kind of distortion of gradual change type, is madeFlap more adapts to humerus form, reaches preferably fitting effect.
In order to facilitate flap distortion, and the obstruction of other body tissues is avoided intentionally, the angle between two flap is30 to 60 degree, preferably 45 degree.If two flap angles are excessive, the degreeof tortuosity of flap can be increased, and be unfavorable for adding for flapThe use of work and lockplate, if the angle between flap is too small, it is likely that the growth that can interfere other body tissues causesSecondary injury.
In order to facilitate the fixation of lockplate, the main body and flap are equipped with lock hole, and locking bore dia is 3-3.5 milliRice.
In order to which preferably fixed humerus epicondyle crushes tissue, the recess is equipped with Kirschner wire fixation hole.Crushing bone tissueOn the basis of resetting positioning, so that it is closely fixed together by Kirschner wire, promotes the healing for crushing bone tissue.
In order to reinforce the stability of lockplate, meanwhile, also for generated fracture below adaptation humerus epicondyle, the masterThe restraint zone that can be slided along main body is arranged on body, it, can be to the fracture generated below humerus epicondyle into one by restraint zoneStep is reinforced fixing, and restraint zone can be slided along main body, enables the suitable position of restraint zone flexible choice to reinforce its useFlexibility.
Specifically, the restraint zone includes lantern ring and the tape that connect with lantern ring, the tape is equipped with lock hole.
Further, restraint zone rotates in main body in order to prevent, and the main body is equipped with guide runner, the lantern ringInner wall is equipped with slide guide protrusion corresponding with guide runner.
The present invention enables flap and recess to be more bonded and protects intercondylar powder on condyle of humerus by setting flap and recessBroken bone tissue provides reset, locating template for these bone tissues crushed, reduces operating difficulty, accelerate bone tissueIt heals and can be avoided bone tissue and generate deformity in agglutination, there is significant technical effect.
Detailed description of the invention
Fig. 1 is the main view of lockplate of the present invention；
Fig. 2 is the right view of lockplate of the present invention；
Fig. 3 is the main view of another embodiment of lockplate of the present invention；
Fig. 4 is restraint zone structural schematic diagram of the present invention.
Main body 1, guide runner 11, the first flap 2, the second flap 3, the first recess 21, Kirschner wire fixation hole 22, the second recess31, lock hole 4, restraint zone 5, lantern ring 51, tape 52, slide guide protrusion 53
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Embodiment 1
As shown in Figure 1 and Figure 2, the anatomical form lockplate for intercondylar comminuted fracture that the present invention relates to a kind of on condyle of humerus,Including main body 1, the first flap 2, the second flap 3, first flap 2 and the second flap 3 are connect with 1 one end of main body respectively, are madeIt obtains main body and the first flap 2 and the second flap 3 is in y-type structure, the end of the first flap 2 is equipped with the first recess 21, the second flap 3It is equipped with the second recess 31, the first recess 21 and the second recess 31 are used to wrap up condyle of humerus epicondyle and crush bone tissue, play positioningReset and defencive function.In order to reinforce the package amplitude of the first recess 21 and the second recess 31, the first recess 21 and the second recess31 width can be greater than the width of the first flap 2 and the second flap 3.
The main body 1, the first flap 1 and the second flap 3 are bar shaped thin skin shape, and are made by titanium alloy, and firstFlap 1 and the second flap 3 circumferentially distort in the longitudinal direction, and distortion angle is spent for 80 to 110, and preferably 90 degree, firstThe distortion of flap 1 and the second flap 3 is so that the first recess 21 and the second recess 31 correspond to each other on opening direction and be conducive to pairThe humerus of comminuted fracture carries out replacement and fixation, so that discrete broken bone is housed inside in recess.
In order to facilitate flap distortion, and the obstruction of other body tissues is avoided intentionally, first flap 1 and the second flapAngle between 3 is set as 30 to 60 and spends, and preferably 45 degree.
The main body 1, the first flap 1 and the second flap 3 are equipped with lock hole 4, and wherein main body 1 is equipped with 5 lock holes4,3 lock holes are respectively equipped on the first flap 1 and the second flap 3, the diameter of lock hole 4 is 3-3.5mm, first recess21 and second recess 31 be respectively provided with the convenient fixation to Kirschner wire in Kirschner wire fixation hole that a diameter is 2.0mm and then realize pairThe fixation of flap end bone tissue.
Embodiment 2
The present embodiment on the basis of embodiment 1 improves the main structure of lockplate.
As shown in Figure 3, Figure 4, it in order to reinforce the flexible fixation to other positions of humerus, is gone back in main body 1 described in the present embodimentIt is arranged with the restraint zone 5 that can be slided along main body, which includes lantern ring 51 and the tape 52 connecting with lantern ring 51, instituteIt states and is again provided with lock hole on tape 52.
It is slided in order to facilitate restraint zone 5 along main body 1 and prevents restraint zone 5 from circumferentially rotating, the present embodiment is also on the body 1Equipped with guide runner 11,51 inner wall of lantern ring is equipped with slide guide protrusion 53 corresponding with guide runner 11.
The design of the lockplate can be designed according to the anatomic form of distal humerus, first to the humerus position of fracture intoRow CT scan simultaneously produces Dicom data, according to Dicom data complete model, then to crushing bone tissue discrete in model intoRow resets, and produces comminuted fracture humerus model using 3D printing technique after reset, is finally made and is locked according to the model formsPlate, the lockplate that this method is produced can completely with distal humerus docile, or even need not first reseting fracture, can be locked in mergingAfter fixed board, broken bone is spliced according to the docile degree of recess anatomic form in broken bone block and lockplate flap, lockplate is at oneThe mold of a reduction of the fracture thus facilitates greatly the reset operation of operative doctor, reaches more preferably surgical effect.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection modelEnclose, to those skilled in the art, should can appreciate that it is all with description of the invention and diagramatic content make etc.Change with replacement and obviously obtained scheme, should all be included within the scope of the present invention.