【摘要】：目的建立髖臼頂壓縮骨折模型,采用壓敏片技術(shù)測量并探討3種不同內(nèi)固定方式固定后髖臼負(fù)重區(qū)接觸特性。方法將16具新鮮成人半骨盆標(biāo)本隨機均分為4組,每組4具。D組為完整髖臼對照組;其余3組制備髖臼頂壓縮骨折模型后,A組采用重建接骨板固定方法、B組采用順行排釘螺釘固定方法、C組采用逆行排釘螺釘固定方法固定骨折。將壓敏片貼于股骨頭上,于倒置的單足站立位行軸向加載壓縮試驗,分別測量各組髖臼負(fù)重區(qū)的負(fù)重區(qū)面積、平均應(yīng)力及峰值應(yīng)力。結(jié)果載荷為500 N時,D組髖臼負(fù)重區(qū)面積顯著高于其余各組,平均應(yīng)力和峰值應(yīng)力顯著低于其余各組,差異均有統(tǒng)計學(xué)意義(P0.05)。B、C組髖臼負(fù)重區(qū)面積顯著高于A組,平均應(yīng)力及峰值應(yīng)力顯著低于A組,差異均有統(tǒng)計學(xué)意義(P0.05);B、C組間比較上述指標(biāo)差異均無統(tǒng)計學(xué)意義(P0.05)。結(jié)論對于髖臼頂壓縮骨折,即使行解剖復(fù)位并堅強內(nèi)固定,髖臼負(fù)重區(qū)接觸特性也不能恢復(fù)至正常水平;順行及逆行排釘螺釘固定與重建接骨板固定相比,能夠增加髖臼負(fù)重區(qū)面積,降低平均應(yīng)力及峰值應(yīng)力,可降低創(chuàng)傷性關(guān)節(jié)炎的發(fā)生率。
[Abstract]:Objective to establish the acetabular top compression fracture model and to measure and study the contact characteristics of the acetabular loaded area after three different internal fixation methods. Methods Sixteen fresh adult hemipelvis specimens were randomly divided into 4 groups, 4 in each group. Group D was a complete acetabular control group. After the model of acetabular parietal compression fracture was made in the other three groups, reconstruction plate fixation was used in group A, anterograde screw fixation was used in group B, and retrograde screw fixation was used in group C. The pressure sensitive film was attached to the femoral head, and the axial loading compression test was carried out in the inverted standing position. The area of the load-bearing area, the average stress and the peak stress of the acetabular area in each group were measured respectively. Results when the load was 500 N, the area of acetabular load area in group D was significantly higher than that in other groups, and the mean stress and peak stress were significantly lower in group D than in other groups (P0.05). The mean stress and peak stress of group A were significantly lower than that of group A, the differences were statistically significant (P0.05), and there was no significant difference between group B and C (P0.05). Conclusion for acetabular parietal compression fracture, the contact characteristics of acetabular bearing area can not be restored to normal level even if anatomical reduction and rigid internal fixation are performed, and the anterograde and retrograde screw fixation can not return to normal level, compared with reconstruction plate fixation. It can increase the area of the acetabular load area, reduce the average stress and peak stress, and reduce the incidence of traumatic arthritis.
【作者單位】： 華北理工大學(xué)研究生學(xué)院;開灤總醫(yī)院普外科;河北醫(yī)科大學(xué)第三醫(yī)院骨科;
【基金】：唐山市科技支撐項目(14130260B)~~
【分類號】：R687.4

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