A comparison of lateral ankle ligament suture anchor strength

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• 作者：F. Alan Barber ; MD ; FACS^a ; ; Morley A. Herbert ; PhD^b ; John M. Crates ; MD^a
• 关键词：Brostrom ; Suture anchor ; Ligament repair ; Ankle instability
• 刊名：Foot and Ankle Surgery
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：19
• 期：2
• 页码：108-111
• 全文大小：328 K

文摘

ass=""h4"">Background

Lateral ankle ligament repairs increasingly use suture anchors instead of bone tunnels. Our purpose was to compare the biomechanical properties of a knotted and knotless suture anchor appropriate for a lateral ankle ligament reconstruction.

ass=""h4"">Methods

In porcine distal fibulae, 10 samples of 2 different PEEK anchors were inserted. The attached sutures were cyclically loaded between 10 N and 60 N for 200 cycles. A destructive pull was performed and failure loads, cyclic displacement, stiffness, and failure mode recorded.

ass=""h4"">Results

PushLock 2.5 anchors failed before 200 cycles. PushLock 100 cycle displacement was less than Morphix 2.5 displacement (p < 0.001). Ultimate failure load for anchors completing 200 cycles was 86.5 N (PushLock) and 252.1 N (Morphix) (p < 0.05). The failure mode was suture breaking for all PushLocks while the Morphix failed equally by anchor breaking and suture breakage.

ass=""h4"">Conclusions

The knotted Morphix demonstrated more displacement and greater failure strength than the knotless PushLock. The PushLock failed consistently with suture breaking. The Morphix anchor failed both by anchor breaking and by suture breaking.