Previous Rotator Cuff Repair Is Associated With Inferior Clinical Outcomes After Reverse Total Shoulder Arthroplasty.

BACKGROUND

Although recent evidence suggests that any prior shoulder surgery may cause inferior shoulder arthroplasty outcomes, there is no consensus on whether previous rotator cuff repair (RCR) is associated with inferior outcomes after reverse total shoulder arthroplasty (RTSA).

PURPOSE

To retrospectively compare outcomes in patients who underwent RTSA with and without previous RCR.

STUDY DESIGN

Cohort study; Level of evidence, 3.

METHODS

Patients with prior RCR and those without previous shoulder surgery (control) who underwent RTSA for cuff tear arthropathy or irreparable cuff tear were retrospectively identified from a prospective database. Exclusion criteria included revision arthroplasty, fractures, rheumatoid arthritis, dislocations, infection, prior non-RCR procedures, less than 12 months of follow-up, and latissimus dorsi tendon transfer. The American Shoulder and Elbow Surgeons (ASES) score, ASES Activities of Daily Living (ADL) score, visual analog scale (VAS) score for pain, Subjective Shoulder Value (SSV), and range of motion (ROM) were compared between groups.

RESULTS

Patients with previous RCR (n = 83 shoulders) were younger (mean ± SD, 67 ± 10 vs 72 ± 8 years; < .001) and more likely to be male (46% vs 32%, = .033) than controls (n = 189 shoulders). No differences were found in follow-up duration (25 ± 13 vs 26 ± 13 months, = .734), body mass index, or any preoperative outcome variable or ROM measure. At final follow-up, patients with previous RCR had significantly lower ASES (76.5 [95% CI, 71.2-81.7] vs 85.0 [82.6-87.5], = .015), lower SSV (76 [72-81] vs 86 [83-88], < .001), worse pain (2.0 [1.4-2.6] vs 0.9 [0.6-1.1], < .001), and less improvement in the ASES, ASES ADL, VAS, SSV, and forward elevation measures than controls. Multivariable linear regression analysis demonstrated that previous RCR was significantly associated with lower postoperative ASES score ( = -9.5, < .001), lower ASES improvement ( = -7.9, = .012), worse postoperative pain ( = 0.9, = .001), worse improvement in pain ( = -1.0, = .011), lower postoperative SSV ( = -9.2, < .001), lower SSV improvement ( = -11.1, = .003), and lower forward elevation ROM improvement ( = -12.7, = .008).

CONCLUSION

Patients with previous RCR attempts may experience fewer short-term gains in functional and subjective outcome scores after RTSA compared with patients with no history of shoulder surgery who undergo RTSA. However, the differences between groups were small and below the minimal clinically important differences for the outcome measures analyzed.