This case series determines the clinical outcomes of relative motion extensor splints (RMES) in extensor mechanism repairs. Nine patients who underwent extensor tendon repair, juncturae tendinum or sagittal band repair were included. A forearm-based volar blocking wrist splint was applied after surgery. The RMES was configured at the initial hand therapy appointment. Total active motion (TAM) at 4 and 8 weeks after surgery and return to work were assessed. There were 7 males and 2 females with a mean age of 28 (16-53 years). The mean TAM of the uninjured digits was 270 degrees (245 degrees-290 degrees). The mean TAM of the injured digits was 209 degrees (125 degrees-275 degrees) at week 4 and 245 degrees (185 degrees-290 degrees) at week 8. The mean return to work time was 25 days. None of the patients had tendon ruptures and required secondary procedures. In our study, active movement with RMES was allowed immediately after surgery. The RMES program supported safer and earlier recovery of motion. All patients were able to perform activities of daily living while wearing the splint. (C) 2020 SFCM. Published by Elsevier Masson SAS. All rights reserved.