Ultrasound-Guided Intra-Articular vs Gluteal Intramuscular Corticosteroid Injection for Frozen Shoulder

The goal of this clinical trial is to determine if a gluteal muscle injection of compound betamethasone is as effective as an ultrasound-guided intra-articular injection in treating frozen shoulder (adhesive capsulitis) in adults aged 18 to 65. The main questions it aims to answer are: * Is gluteal injection as effective as ultrasound-guided intra-articular injection for improving shoulder function and reducing pain? * What are the side effects of each treatment method? Researchers will compare these two injection methods. Participants will: * Receive one injection at baseline and will be followed up for 12 weeks * Complete shoulder function assessments * Perform home rehabilitation exercises

NCT Number	NCT07416916
Lead Sponsor	Second Affiliated Hospital, School of Medicine, Zhejiang University
Conditions	Frozen Shoulder
Enrollment	528 participants
Start Date	2026-02-23
Primary Completion	2030-10 (estimated)
Study Completion	2031-01 (estimated)
Updated on ClinicalTrials.gov	2026-06-01