Combined Subacromial Bursal Stem Cell Therapy and Platelet-Rich Plasma Alongside Arthroscopic Rotator Cuff Surgery Reduces Postoperative Pain and Improves Functional Outcomes: A Retrospective Study.

: This study investigates the benefits of incorporating stem cell therapy into arthroscopic rotator cuff repair by evaluating its impact on postoperative pain and functional recovery. : A retrospective, comparative analysis was conducted with a small cohort of patients undergoing rotator cuff surgery, divided into two groups: one receiving adjunctive combined PRP and bursal stem cell therapy and the other undergoing standard arthroscopic repair alone. The outcomes were assessed using visual analog scale (VAS) scores for pain and the Constant-Murley score (CMS), which includes strength of abduction, VAS pain, limitation and range of motion, evaluated at baseline, 1, 2, 3 and 6 months postoperatively. : Patients in the stem cell group experienced significantly greater reductions in pain scores and more substantial improvements in functional scores at the follow-up points compared to the control group. A linear mixed-effects analysis showed that in the early postoperative period, the use of PRP and bursal stem cell therapy was associated with significantly reduced postoperative VAS pain scores (F 4.8, = 0.045) and an increased CMS regarding postoperative pain (F 8.6, = 0.01), alongside painless elevation level (F 6.5, = 0.022), forward flexion (F 8.5, = 0.01) and abduction scores (F 8.3, = 0.011). The effect of PRP and bursal stem cell therapy remains constant during late follow-up, from the fourth to sixth postoperative month, with postoperative CMS regarding pain remaining statistically significantly higher in the stem cell therapy group (F 4.8, = 0.008), alongside reduced night-time pain (F 7.4, = 0.015), improved recreation ability (F 4.8, = 0.044) and reduced activity restriction (F 5.8, = 0.028). : The findings suggest that the addition of stem cell therapy to arthroscopic rotator cuff repair may enhance postoperative recovery by alleviating pain and promoting functional gains.