不同接骨板組合治療干骺端粉碎股骨遠端骨折的動物實驗
[Abstract]:Objective to explore the curative effect of single plate and different combination of double plate in the treatment of metaphyseal comminuted distal femur fracture, to provide research direction for large sample size experiment and to provide guidance for clinical treatment. Methods A model of bilateral distal femoral comminuted fracture was established in 5 healthy pigs (Bama miniature pig) [International Institute of Internal Fixation (AO/ASIF) classified as 33-C2.3 type]. The control group was divided into five groups: the control group (n = 1) was fixed with a single lateral anatomic locking plate, the control group (n = 2) with a locked reconstruction plate and a control group (n = 2), each pig side of the hind limb was fixed with a lateral anatomic locking plate (LLP). The contralateral hindlimb was fixed with lateral anatomical locking plate, medial reconstruction plate, left and right side randomly, two of them were in locking compression plate group and common compression group, and each pig was fixed with lateral anatomical locking plate on the medial side of the posterior limb. The contralateral hindlimb was fixed with lateral anatomic locking plate medial compression plate. The fracture healing and internal fixation loosening were observed by X-ray radiography at 4 ~ 8 ~ 12 weeks postoperatively. Experimental pigs were killed 12 weeks after operation and the maximum anteroposterior diameter of callus was measured on lateral X-ray films of distal femur. All femur specimens were subjected to vertical compression experiment after removal of internal fixation. The maximum axial compression displacement was recorded and the average axial stiffness was calculated. Results all 5 pigs survived, fracture healed, no infection occurred and internal fixation failed. In the gross specimens, the mean value of the maximum anteroposterior diameter of callus in each double plate group was higher than that in the single plate group, and the largest (5.02cm) in the locked reconstruction plate group and the smallest (4.16cm) in the locking compression plate group. In the vertical compression experiment, the mean value of maximum axial compression displacement of both hind limbs of pigs in each double plate group was lower than that of single plate group, and the mean axial stiffness of each double plate group was higher than that of single plate group. In the double plate group, The maximum axial compression displacement (2.50mm) and average axial stiffness (1 200.71N/mm) of both hind limbs were the smallest (2.50mm) and the maximum axial compression displacement (2. 91 mm), level) of both hind limbs in the LRP group and the normal compression plate group respectively. The mean value of mean axial stiffness is minimum (1 032.76N/mm). Conclusion double plate fixation is an ideal method for the treatment of metaphyseal comminuted distal femur fracture. The lateral anatomic locking plate and the medial locking reconstruction plate may be the most beneficial to the healing of the fracture.
【作者單位】: 上海交通大學醫(yī)學院附屬新華醫(yī)院骨科;
【分類號】:R687.3
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