A Pilot Study to Assess the Immediate Effect of Dynamic Carbon Ground Reaction Ankle Foot Orthoses on Balance in Individuals with Charcot-Marie-Tooth in a Clinical Setting

Abstract

Charcot-Marie-Tooth (CMT) causes muscle weakness and atrophy generally in distal extremities, with or without sensory changes. These impairments contribute to impaired balance and gait and increase risk for falls and secondary injuries. Dynamic Carbon Ground Reaction Ankle Foot Orthoses (DCGR-AFOs) are one type of lower extremity orthosis that can be prescribed to help improve gait and balance in this patient population. To our knowledge, no studies have evaluated the immediate impact of DCGR-AFOs on gait and balance in this population. In this pilot study, 9 individuals with CMT and gait impairment were seen in clinical setting by a physical therapist and orthotist. Participants were asked to complete the modified Clinical Test of Sensory Interaction and Balance (mCTSIB) and tasks on the 4-Item Dynamic Gait Index (DGI) with and without bilateral DCGR-AFOs to assess static and dynamic balance. The average DGI scores were 6/12 without the DCGR-AFOs and 10/12 with the DCGR-AFOs. Improvements on the mCTSIB varied. The findings in this study suggest an immediate improvement in dynamic balance during ambulation with the use of DCGR-AFOs, as assessed by the 4-Item DGI. Data on static balance did not reach significance suggesting the need for future studies to further assess the effects of DCGR-AFOs on static standing balance, as well as the impact of training with physical therapists. This pilot study demonstrates that it is possible to demonstrate potential benefits of DCGR-AFOs with a gross fitting in a clinical setting, prior to referral to an orthotist for custom fitting.