本文關鍵詞： 髖臼方形區(qū)骨折 內固定 重建接骨板 拉力螺釘 生物力學　出處：《華北理工大學》2016年碩士論文　論文類型：學位論文

【摘要】：目的比較髖臼方形區(qū)骨折四種內固定方式的生物力學差異。方法取16具成人男性半骨盆標本,制作髖臼方形區(qū)骨折模型,根據(jù)內固定方式不同隨機分成4組(n=4),分別行骨盆緣下重建接骨板內固定(A組)、骨盆緣下鎖定重建接骨板內固定(B組)、前柱重建接骨板結合方形區(qū)螺釘內固定(C組)、前柱重建接骨板加后柱拉力螺釘內固定(D組),將柳葉狀壓敏片貼于股骨頭上,通過垂直加載依次測量生理體重600N下完整髖臼I組(未制作骨折線)和A、B、C、D四組的臼頂接觸特性,及連續(xù)分級負載下A、B、C、D四組的水平位移、縱向位移,并計算軸向剛度。結果生理體重600N載荷下四組內固定的髖臼負重區(qū)接觸特性未能恢復至正常,負重面積、平均應力、峰值應力差異均有統(tǒng)計學意義(P0.05)。同一載荷下,A、B、C、D組水平、縱向位移均逐漸減小,其中加載至1800N時A組縱向位移大于3.00mm,達到失效標準;而軸向剛度則逐漸增大。加載至200N時各組水平、縱向位移及軸向剛度比較,差異均無統(tǒng)計學意義(P0.05);600~1800N時,除C組與D組間水平位移差異無統(tǒng)計學意義(P0.05)外,其余各組水平、縱向位移及軸向剛度比較,差異均有統(tǒng)計學意義(P0.05)。結論對髖臼方形區(qū)骨折予以四種不同內固定,采用前柱重建接骨板加后柱拉力螺釘內固定髖臼方形骨折時的穩(wěn)定性及臼頂接觸特性最佳,其次為前柱重建接骨板結合方形區(qū)螺釘內固定,均優(yōu)于骨盆緣下鎖定重建接骨板和重建接骨板內固定。
[Abstract]:Objective to compare the biomechanical differences among the four internal fixation methods for the fracture of the acetabular square region. Methods Sixteen adult male hemipelvis specimens were taken to make the fracture model of the acetabular square area. According to the different internal fixation methods, they were randomly divided into 4 groups: group A (group A) and group B (group B). Anterior column reconstruction plate combined with square area screw internal fixation group C, anterior column reconstruction plate and posterior column lag screw internal fixation group D, willow leaf pressure sensitive film on the femoral head. The acetabular top contact characteristics of the intact acetabular group I (without fracture line) and the acetabular top contact characteristics under continuous graded loading were measured by vertical loading. Results under the load of 600N, the contact characteristics of the acetabular load-bearing area of the four groups could not return to normal, the load area and the average stress. The difference of peak stress was statistically significant (P 0.05). Under the same load, the longitudinal displacement decreased gradually. When loaded to 1800N, the longitudinal displacement of group A is greater than 3.00mm, which reaches the failure standard. However, the axial stiffness increased gradually, and there was no significant difference in longitudinal displacement and axial stiffness between each group at 200N level (P 0.05). At 600 ~ 1800N, there was no significant difference in horizontal displacement between group C and group D (P0.05), and the horizontal displacement and axial stiffness of other groups were compared. The differences were statistically significant (P 0.05). Conclusion there are four different internal fixation methods for the fracture of the acetabular square area. The stability and the contact characteristics of acetabular top were the best when the anterior column reconstruction plate was used to fix the acetabular square fracture, and the second was the anterior column reconstruction plate combined with the square area screw internal fixation. All of them were superior to the locking reconstruction plate and the internal fixation of the reconstruction plate under the pelvic margin.
【學位授予單位】：華北理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：R683
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本文編號：1487266