Ultrasonically implanted PLA suture anchors are stable in osteopenic bone
Ultrasonically implanted PLA suture anchors are stable in osteopenic bone
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DOI：
10.1097/01.blo.0000185033.32220.57
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发表时间：
2006-01-01
影响因子：
4.2
通讯作者：
Gerber, C.
中科院分区：
文献类型：
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作者：
Meyer, D. C.;Mayer, J.;Gerber, C.
我们比较了金属螺钉型缝线锚（5-mm Corkscrew（TM））和一种新的超声植入的可吸收钉从不同骨密度的尸体肱骨头中的体外拔出强度。他们进行了定量评估，使用微型计算机断层扫描。在四个标准化部位进行拔出试验，然后与局部骨密度相关。5 mm Corkscrew（TM）和3.5 mm聚乳酸骨针在弱骨（76 +/- 24 N vs 104 +/- 46 N）、中等质量骨（194 +/- 81 N vs 218 +/- 76 N）和强骨（349 +/- 127 N vs 325 +/- 100 N）中的平均拔出强度相似。两种植入物的拔出强度与骨密度相关（Corkscrew（TM）和聚乳酸销分别为r = 0.76和r = 0.86）。超声植入的可吸收3.5 mm聚乳酸销在弱骨中实现了与较大的5 mm钛Corkscrew（TM）相同的拔出强度。肱骨头的骨密度变化很大，影响了两种植入物的拔出强度。
We compared the in vitro pullout strengths of a metallic screw-type suture anchor (5-mm Corkscrew(TM)) and a new ultrasonically implanted absorbable pin from cadaveric humeral heads with different bone densities. They were assessed quantitatively using microcomputed tomography. Pullout tests were done at four standardized sites and then correlated with the local bone density. The mean pullout strengths for the 5-mm Corkscrew(TM) and the 3.5-mm polylactic pin were similar in weak bone (76 +/- 24 N versus 104 +/- 46 N), intermediate quality bone (194 +/- 81 N versus 218 +/- 76 N), and strong bone (349 +/- 127 N versus 325 +/- 100 N). Pullout strength correlated with bone density for both implants (r = 0.76 and r = 0.86 for the Corkscrew(TM) and polylactic pin, respectively). The ultrasonically implanted absorbable 3.5-mm polylactic pin achieved equal pullout strength in weak bone as the larger 5-mm titanium Corkscrew(TM). Bone density is highly variable in humeral heads and influenced the pullout strength of both implants.