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Table 5 Fluid detection classified by patient and anchors: grade 0, no fluid signal; grade 1, < 1 mm diameter of fluid accumulation; grade 2, 1–5.5 mm diameter of fluid accumulation, definitive osteolysis; grade 3, > 5.5 mm–6.5 mm diameter of fluid accumulation surrounding the implant; and grade 4, > 6.5 mm diameter of fluid accumulation around the former anchor, definitive cyst

From: Osteoconductive resorption characteristics of a novel biocomposite suture anchor material in rotator cuff repair

Fluid collection grades by patients and anchors
Grade Patients Anchors
0 33 57
1 13 23
2 2 2
3 0 0
4 0 0