抄録
Background: The purpose of this study was to examine the frequency of effusion around PEEK (polyetheretherketone) suture anchor after rotator cuff repair.
Methods: A total of 36 rotator cuff tears were repaired arthroscopically only with PEEK suture anchors. In 15 of the 36 rotator cuff tears, single-row repairs with TwinfixTM PK FT 5.5mm anchors were done. In 21 of 36 tears, single-row repairs (TwinfixTM PK FT 5.5mm suture anchor) combined with augmentation suture (Footprint PK 5.5mm suture anchor) were done. The effusion around PEEK suture anchors were examined on the MRI images at 6 months after the repair.
Results: 17 of 85 (20%) TwinfixTM PK anchors and 1 of 21 (4.8%) Footprint PK anchors had changes of signal intensity around the anchors, indicating effusion around the anchor. The effusion around anchors was found in 13 of 36 shoulders. In these 13 shoulders, the rupture of repaired rotator cuff occurred in one shoulder.
Conclusion: The micro-motion around the PEEK anchor might cause the effusion around the anchors. The effusion around the anchor might lead the loosening. However, the re-tear rate was not high, and the effusion around the PEEK anchor will not make clinical problem during cuff repair.
