Objective: Polydeoxyribonucleotide as adenosine receptor (A) agonist has been used in plastic surgery and dermatology related to its regenerative property. The aim of this pilot study is to evaluate the safety and efficacy of polydeoxynucleotide injection in patients with rotator cuff tears by a variety of outcomes including pain, disability, physical performance test, and ultrasonography (US).
Methods: Seventeen patients (9 men, 8 women, age: 57.9 ± 9.1) with partial-thickness tear of supraspinatus tendon were evaluated in a prospective, open-label, and pre-and-post study. Seventeen patients underwent 3 times intra-lesional polydeoxynucleotide injection under ultrasound (US) guidance on weeks 0, 2 and 4. The safety and efficacy were assessed on weeks 0, 6 and 12. Main outcome measures included shoulder pain on Visual Analogue Scale (VAS) and DASH (disabilities of arm, hand, shoulder) score, range of motion in shoulder, shoulder strength and tear volume (cm) by US. Adverse events were monitored. (CRIS: https://www.cris.nih.go.kr , KCT0000767).
Results: Active shoulder pain on VAS reduced from 5.53 to 3.53 (P = 0.016), and acting pain, one of DASH questionnaires, reduced from 3.35 to 2.00 (P < 0.001). However, resting shoulder pain on VAS and total DASH scores were not significantly different. Forward flexion and internal rotation in range of motion improved significantly (from 169.41 to 178.13 degrees [P = 0.004] and from 83.53 to 88.75 degrees [P = 0.014], respectively). The volume of torn lesion decreased during the study period, however it was not significant. There were no significant adverse events leading to hospitalization.
Conclusions: Minimally invasive procedure through polydeoxynucleotide injection into torn area of supraspinatus tendon on US could be candidate for the safe and effective treatment on shoulder pain and limited range of motion in patients with rotator cuff tear.
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