中华创伤杂志
中華創傷雜誌
중화창상잡지
Chinese Journal of Traumatology
2013年
12期
1170-1173
,共4页
关节成形术,置换,髋%髋假体%股骨头
關節成形術,置換,髖%髖假體%股骨頭
관절성형술,치환,관%관가체%고골두
Arthroplasty,replacement,hip%Hip prosthesis%Femur head
目的 探讨股骨头部分切除行生物性假体人工股骨头置换对股骨近端载荷性能的影响,以评估置换后假体的稳定性. 方法 选取24具正常青壮年新鲜股骨(包括股骨头)标本,其中8具标本利用自行研究设计的假体,行人工股骨头置换术,8具设为对照组,8具设为疲劳组.建立单腿站立位股骨头受力模型,生物力学测定仪测试2000N载荷下部分人工股骨头置换前后股骨颈基底外上方(A)、股骨颈内侧小转子部(B)及股骨大转子下方(C)的载荷-应力和载荷-位移的差异. 结果 载荷为2000N时,人工股骨头置换后的实验组,在股骨颈内侧小转子部及股骨大转子下方的载荷-应力与正常股骨头组比较,差异无统计学意义(P＞0.05),而在股骨颈基底外上方的载荷-应力与正常股骨头组比较,差异有统计学意义(P＜0.05).疲劳组与假体组、正常组A、B、C点各载荷应力比较,差异均无统计学意义(P＞0.05). 结论 股骨头部分切除后,人工股骨头置换的生物性假体能有效维持股骨近端的正常应力传递.
目的 探討股骨頭部分切除行生物性假體人工股骨頭置換對股骨近耑載荷性能的影響,以評估置換後假體的穩定性. 方法 選取24具正常青壯年新鮮股骨(包括股骨頭)標本,其中8具標本利用自行研究設計的假體,行人工股骨頭置換術,8具設為對照組,8具設為疲勞組.建立單腿站立位股骨頭受力模型,生物力學測定儀測試2000N載荷下部分人工股骨頭置換前後股骨頸基底外上方(A)、股骨頸內側小轉子部(B)及股骨大轉子下方(C)的載荷-應力和載荷-位移的差異. 結果 載荷為2000N時,人工股骨頭置換後的實驗組,在股骨頸內側小轉子部及股骨大轉子下方的載荷-應力與正常股骨頭組比較,差異無統計學意義(P＞0.05),而在股骨頸基底外上方的載荷-應力與正常股骨頭組比較,差異有統計學意義(P＜0.05).疲勞組與假體組、正常組A、B、C點各載荷應力比較,差異均無統計學意義(P＞0.05). 結論 股骨頭部分切除後,人工股骨頭置換的生物性假體能有效維持股骨近耑的正常應力傳遞.
목적 탐토고골두부분절제행생물성가체인공고골두치환대고골근단재하성능적영향,이평고치환후가체적은정성. 방법 선취24구정상청장년신선고골(포괄고골두)표본,기중8구표본이용자행연구설계적가체,행인공고골두치환술,8구설위대조조,8구설위피로조.건립단퇴참립위고골두수력모형,생물역학측정의측시2000N재하하부분인공고골두치환전후고골경기저외상방(A)、고골경내측소전자부(B)급고골대전자하방(C)적재하-응력화재하-위이적차이. 결과 재하위2000N시,인공고골두치환후적실험조,재고골경내측소전자부급고골대전자하방적재하-응력여정상고골두조비교,차이무통계학의의(P＞0.05),이재고골경기저외상방적재하-응력여정상고골두조비교,차이유통계학의의(P＜0.05).피로조여가체조、정상조A、B、C점각재하응력비교,차이균무통계학의의(P＞0.05). 결론 고골두부분절제후,인공고골두치환적생물성가체능유효유지고골근단적정상응력전체.
Objective To investigate effect of the biological prosthesis on load properties of the proximal femur after hemiarthroplasty with partial resection of the femoral head in order to assess stability of the prosthetic implant.Methods Twenty-four young fresh normal femur (with preservation of femoral head) specimens were assigned to prosthesis group (n =8),control group (n =8) and fatigue group (n =8).Specimens in prosthesis group underwent artificial femoral head replacement using self-designed prostheses.Stress at the femoral head with the model standing on one leg was performed.Biomechanical machine was used to detect the difference of load-stress and load-displacement before and after femoral head replacement under the load of 2000 N.Detection points included lateral superior base of femoral neck (A),medial side of lesser trochanter of femur (B),and inferior side of greater trochanter of femur (C).Results At the load of 2 000 N,the load-stress at inferior side of greater trochanter of femur and medial side of lesser trochanter of femur revealed no significance differences between the normal femur and femur with artificial femoral head replacement (P ＞ 0.05),while the difference was significant at lateral superior base of femoral neck (P ＜ 0.05).There were no significant differences of load-stress at A,B,and C points among fatigue group,prosthesis group and control group (P ＞ 0.05).Conclusion After partial femoral head replacement,the biological prosthesis is effective in maintenance of the normal stress transfer in the proximal femur.
