Abstract
Background
Successful use of bioabsorbable anchors for capsulolabral and rotator cuff repair is well documented. The bioknotless anchor (DePuy mitek) has demonstrated reliable fixation of these pathologies. However, this poly (L-lactide) polymer has recently demonstrated some similar complications to those documented for the earlier polyglycolic acid implants; namely synovitis and chondral damage with osteolysis. We report three cases with osteolysis and chondral damage associated with bioknotless anchors.
Methods
A prospective record of shoulder arthroscopy is maintained by the senior author. From this, three patients with post-operative complications of arthropathy and osteolysis, following bioabsorbable anchor repair of capsulolabral lesions were identified. A retrospective review of case notes, radiographs, operative records and intraoperative video and photographic material was undertaken.
Results
All patients had acceptable initial progress of rehabilitation. At 12-15 months, recurrence of symptoms promoted further radiological investigation and where the patient consented, repeat arthroscopy. In all cases advanced arthropathy was noted.
Conclusion
It is likely that the use of knotless bioabsorbable anchors may promote advanced arthropathy. Initial loss of fixation and early pullout of the anchors may allow synovial contact with anchor material promoting hydrolysis and early arthropathy.
