本文選題：髖臼 + 關(guān)節(jié)面��； 參考：《中國生物醫(yī)學(xué)工程學(xué)報(bào)》2017年03期

【摘要】：探討髖臼骨折塊不同旋轉(zhuǎn)方向的臺(tái)階狀移位對(duì)髖臼應(yīng)力分布及大小等的影響,以期為臨床治療髖臼骨折及預(yù)后評(píng)估提供一定的理論指導(dǎo)。采用5具成人骨盆標(biāo)本(10個(gè)髖關(guān)節(jié)),其中男性尸體標(biāo)本3例,女性2例,年齡在23~66歲,平均年齡38.7歲。排除骨折、畸形、發(fā)育未完全及退行性病變。分別測(cè)量完整髖臼(I組)、解剖復(fù)位(K組)、不同臺(tái)階移位(A組:1 mm、B組:2 mm、C組:3 mm、D組:4 mm;a組:-1 mm、b組:-2 mm、c組:-3 mm、d組:-4 mm)時(shí)髖臼與股骨頭之間的接觸特性。所獲數(shù)據(jù)經(jīng)統(tǒng)計(jì)分析軟件進(jìn)行分析比較差異。結(jié)果表明,完整髖臼負(fù)重區(qū)平均應(yīng)力為(3.06±0.27)MPa,骨折后負(fù)重區(qū)應(yīng)力有增大趨勢(shì)。K組的平均應(yīng)力為(2.98±0.50)MPa,當(dāng)內(nèi)旋使臺(tái)階移位達(dá)到2 mm或更大,當(dāng)外旋使臺(tái)階移位達(dá)到3 mm時(shí),負(fù)重區(qū)平均應(yīng)力顯著性增大。負(fù)重區(qū)的峰值應(yīng)力在完整髖臼為(5.05±0.38)MPa,骨折后負(fù)重區(qū)峰值應(yīng)力有增大趨勢(shì)。解剖復(fù)位組的平均應(yīng)力為(5.58±0.72)MPa(與完整髖臼負(fù)重區(qū)峰值應(yīng)力相比P0.05);當(dāng)內(nèi)旋使臺(tái)階移位達(dá)到1 mm或更大,外旋使臺(tái)階移位達(dá)到3 mm或更大時(shí),負(fù)重區(qū)峰值應(yīng)力與完整髖臼有顯著性差異。髖臼雙柱骨折產(chǎn)生的臺(tái)階狀移位改變正常髖關(guān)節(jié)的生物力學(xué)特性,使髖關(guān)節(jié)的接觸面積、平均應(yīng)力以及峰值應(yīng)力均發(fā)生重新分布。
[Abstract]:To explore the influence of step displacement of acetabular fracture in different rotation directions on the stress distribution and size of acetabulum in order to provide some theoretical guidance for clinical treatment of acetabular fracture and evaluation of its prognosis. Five adult pelvic specimens (10 hip joint specimens) were used, including 3 male cadaveric specimens and 2 female cadaveric specimens, with an average age of 38.7 years. Excluded fractures, deformities, incomplete development, and degenerative lesions. The contact characteristics between acetabular and femoral head were measured in group I, anatomic reduction and K group respectively. The obtained data were analyzed and compared with each other by statistical analysis software. The results showed that the average stress in the intact acetabular load area was 3.06 鹵0.27 MPa, and the stress in the loading area after fracture was increasing. In group K, the mean stress was 2.98 鹵0.50 mpa. When the internal rotation made the step shift to 2 mm or greater, when the external rotation caused the step displacement to reach 3 mm, the average stress of group K was 2.98 鹵0.50 m. The average stress increased significantly in the load area. The peak stress in the whole acetabulum was 5.05 鹵0.38 MPA, and the peak stress in the load-bearing area increased after fracture. The average stress of the anatomic reduction group was 5.58 鹵0.72 mpa (compared with the peak stress of the complete acetabular load area, P0.05, when the internal rotation made the step shift to 1 mm or greater, and the external rotation to the step displacement to 3 mm or more, respectively), and the average stress of the anatomic reduction group was 5.58 鹵0.72 m / m (P < 0.05). There was significant difference between the peak stress and the complete acetabulum in the load area. The step displacement caused by acetabular double column fracture changes the biomechanical characteristics of the normal hip joint and redistributes the contact area, average stress and peak stress of the hip joint.
【作者單位】： 溫州醫(yī)科大學(xué)附屬第三醫(yī)院關(guān)節(jié)外科;溫州醫(yī)科大學(xué)附屬第三醫(yī)院醫(yī)學(xué)工程科;
【基金】：溫州市科技局項(xiàng)目基金(Y20140593)
【分類號(hào)】：R318.01;R683
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本文編號(hào)：1823200