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Osteolysis is observed around both bioabsorbable and nonabsorbable anchors on serial magnetic resonance images of patients undergoing arthroscopic rotator cuff repair

abstract
Objectives: The objective of this study was to evaluate the incidence of osteolysis around the bioabsorbable and nonabsorbable anchors using serial magnetic resonance imaging (MRI) and to determine
the relationship between osteolysis and the retear rate after arthroscopic rotator cuff repair.
Methods: From July 2012 to July 2014, 50 patients [28 men and 22 women; mean age, 56.4 (range: 45
e56) years] underwent arthroscopic rotator cuff repair for a medium-to large-size tear with double-row
suture-bridge technique. The bioabsorbable anchors used in the medial row comprised hydroxyapatitepolylactic acid enantiomer, and the nonabsorbable anchors in the lateral row were polyetheretherketone
(PEEK)-type anchors. All patients underwent MRI evaluation at 3, 6, and 12 months postoperatively to
determine osteolysis and identify any retear.
Results: The incidences of osteolysis at 3, 6, and 12 months postoperatively were 1%, 4%, and 6% with
nonabsorbable anchors and 13%, 29%, and 39% with bioabsorbable anchors, respectively. The incidences
of osteolysis were significantly higher with the bioabsorbable anchors than with the nonabsorbable
anchors (P < 0.005 for all three follow-ups). There was no significant difference between osteolysis and
non-osteolysis groups regarding the retear rate or retear size (P ¼ 0.189 and 0.069, respectively).
Conclusions: Osteolysis was common around bioabsorbable anchors used for arthroscopic rotator cuff
repair, and it also occurred around the PEEK-type nonabsorbable anchors. The incidence of osteolysis of
nonabsorbable anchors was significantly lower than that of bioabsorbable anchors. Osteolysis did not
significantly affect rotator cuff retear after arthroscopic repair with either bioabsorbable or nonabsorbable anchors.
Level of evidence: Level III, Therapeutic Study.
© 2019 Turkish Association of Orthopaedics and Traumatology. Publishing services by Elsevier B.V. This is
an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/

Authors

Ivan Micic a , Erica Kholinne b, c , Jae-Man Kwak c , Kyoung-Hwan Koh c , In-Ho Jeon c, *
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