聚己二酮
极限抗拉强度
肩袖
肌腱
纤维接头
刚度
机械强度
固定(群体遗传学)
最终失效
医学
材料科学
外科
生物医学工程
复合材料
环境卫生
人口
作者
Christian Gerber,Alberto G. Schneeberger,Martín Beck,U. Schlegel
出处
期刊:The journal of bone and joint surgery
[British Editorial Society of Bone and Joint Surgery]
日期:1994-05-01
卷期号:76-B (3): 371-380
被引量:621
标识
DOI:10.1302/0301-620x.76b3.8175836
摘要
We have studied the mechanical properties of several current techniques of tendon-to-bone suture employed in rotator-cuff repair. Non-absorbable braided polyester and absorbable polyglactin and polyglycolic acid sutures best combined ultimate tensile strength and stiffness. Polyglyconate and polydioxanone sutures failed only at high loads, but elongated considerably under moderate loads. We then compared the mechanical properties of nine different techniques of tendon grasping, using 159 normal infraspinatus tendons from sheep. The most commonly used simple stitch was mechanically poor: repairs with two or four such stitches failed at 184 N and 208 N respectively. A new modification of the Mason-Allen suture technique improved the ultimate tensile strength to 359 N for two stitches. Finally, we studied the mechanical properties of several methods of anchorage to bone using typically osteoporotic specimens. Single and even double transosseous sutures and suture anchor fixation both failed at low tensile loads (about 140 N). The use of a 2 mm thick, plate-like augmentation device improved the failure strength to 329 N. The mechanical properties of many current repair techniques are poor and can be greatly improved by using good materials, an improved tendon-grasping suture, and augmentation at the bone attachment.
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