中华手外科杂志
中華手外科雜誌
중화수외과잡지
CHINESE JOURNAL OF HAND SURGERY
2009年
5期
298-300
,共3页
手骨%骨折%生物力学%可吸收锥形针
手骨%骨摺%生物力學%可吸收錐形針
수골%골절%생물역학%가흡수추형침
Hand%bones%Fractures bone%Biomechanics%Resorbable tapered pin
目的 研究可吸收锥形针的生物力学性能,探讨其在手部骨折中应用的可行性.方法 取新鲜冰冻尸体掌、指骨共32根,左右配对,斜形截骨后分别用2根1.0 mm克氏针和2根1.3 mm 可吸收锥形针固定,通过折弯试验和疲劳试验对两种材料进行生物力学测试.结果 可吸收锥形针的抗弯刚度和最大载荷均显著小于克氏针;疲劳试验后两种材料的抗弯刚度差异无统计学意义,克氏针的最大载荷显著大于可吸收锥形针,而可吸收锥形针经疲劳试验后形变显著小于克氏针;疲劳试验后可吸收锥形针与克氏针的最大载荷比大于折弯试验中两者的最大载荷比,差异有统计学意义,而抗弯刚度比差异无统计学意义.结论 可吸收锥形针强度小于克氏针,但足以对抗术后功能锻炼时的应力,由于具有良好的弹性,在术后功能锻炼方面比克氏针更优越.
目的 研究可吸收錐形針的生物力學性能,探討其在手部骨摺中應用的可行性.方法 取新鮮冰凍尸體掌、指骨共32根,左右配對,斜形截骨後分彆用2根1.0 mm剋氏針和2根1.3 mm 可吸收錐形針固定,通過摺彎試驗和疲勞試驗對兩種材料進行生物力學測試.結果 可吸收錐形針的抗彎剛度和最大載荷均顯著小于剋氏針;疲勞試驗後兩種材料的抗彎剛度差異無統計學意義,剋氏針的最大載荷顯著大于可吸收錐形針,而可吸收錐形針經疲勞試驗後形變顯著小于剋氏針;疲勞試驗後可吸收錐形針與剋氏針的最大載荷比大于摺彎試驗中兩者的最大載荷比,差異有統計學意義,而抗彎剛度比差異無統計學意義.結論 可吸收錐形針彊度小于剋氏針,但足以對抗術後功能鍛煉時的應力,由于具有良好的彈性,在術後功能鍛煉方麵比剋氏針更優越.
목적 연구가흡수추형침적생물역학성능,탐토기재수부골절중응용적가행성.방법 취신선빙동시체장、지골공32근,좌우배대,사형절골후분별용2근1.0 mm극씨침화2근1.3 mm 가흡수추형침고정,통과절만시험화피로시험대량충재료진행생물역학측시.결과 가흡수추형침적항만강도화최대재하균현저소우극씨침;피로시험후량충재료적항만강도차이무통계학의의,극씨침적최대재하현저대우가흡수추형침,이가흡수추형침경피로시험후형변현저소우극씨침;피로시험후가흡수추형침여극씨침적최대재하비대우절만시험중량자적최대재하비,차이유통계학의의,이항만강도비차이무통계학의의.결론 가흡수추형침강도소우극씨침,단족이대항술후공능단련시적응력,유우구유량호적탄성,재술후공능단련방면비극씨침경우월.
Objective To study biomechanical characteristics of resorbable tapered pin,and to investigate the feasibility of using for fixation of fracetures of the hand. Methods Sixteen pairs of fresh frozen human cadaveric metacarpal and proximal phalangeal bones were utilized.An oblique osteotomy was made at an angle of appropriately 45°to the long axis of the bone,and the bone was then fixed with two 1.0 mm K-wires or two resorbable tapered pins.Bending and fatigue testing were performed to obtain biomechanical data. Results ?The bending rigidity and the maximal load of resorbable taoered pin was significantly lower than that of K-wire. After fatigue testing,the maximal load and the displacement of resorbable tapered-pin was significantly lower than that of K-wire,while the bending rigidity is not statistically different between two materials.The maxinal load ratio of resorbable tapered pin to K-wire was significantly higher after fatigue testing, but the bending rigidity ratio was not statistically different. Conclusion The rigidity of resorbable tapered pin was lower than that of K-wire, but still strong enough to counteract the stress caused by postoperative rehabilitation.Resorbable tapered pin has great flexibility and is superior to K-wire during postoperative exercise.
