Efficacy and safety of volar locking plate versus cast immobilization for distal radius fractures: a systematic review and meta-analysis of randomized controlled trials

Volar locking plates (VLPs) are increasingly used for distal radius fractures (DRFs), yet their efficacy compared to cast immobilization remains debated. This meta-analysis aimed to compare VLPs versus cast immobilization for DRFs across various follow-up durations. Randomized controlled trials reporting patient-reported functional scores, wrist range of motion (ROM), radiological assessments, and complications were included. Meta-analysis was performed for 6-week, 3-month, 6-month, 12-month, and >12-month follow-ups. Subgroup analysis stratified studies by age group, >= 60 years and < 60 years. VLPs showed significantly lower Disabilities of the Arm, Shoulder, and Hand (DASH) scores at 6 weeks (p < 0.001), 3 months (p < 0.001), 12 months (p = 0.012), and > 12 months (p < 0.001), and lower PRWE scores at 6 weeks (p < 0.001), 3 months (p = 0.048), and >12 months (p = 0.032). Wrist ROM favored VLPs at 6 weeks (p < 0.05), with higher flexion and supination at 3 months (p = 0.027) and 12 months (p = 0.003). Radiologically, VLPs showed improved parameters at 3- and 12-month follow-up. Overall complications did not significantly differ. Subgroup analysis in patients < 60 years generally supported these findings, while in patients >= 60 years, radiological outcomes aligned, yet only lower DASH scores were observed with VLPs at 3 months (p < 0.001). VLPs may offer superior clinical, functional, and radiological outcomes compared to cast immobilization at 3- and 12-month follow-up for patients < 60 years, with comparable safety profiles. For patients >= 60 years, VLPs may yield better radiological outcomes at 3- and 12-month follow-up, though clinical benefits remain uncertain.