Background: Few studies on tarsometatarsal fracture dislocations report on plantar pressure analysis and quality of life. The primary aim of this study was to determine the added value of plantar pressure analysis. The secondary aim was to determine quality of life and functional outcome.
Materials and methods: With a median followup of 76 months, 26 patients with an isolated Lisfranc injury participated. The Short Form 36 (SF-36) was used to determine the health related quality of life. Functional outcome was assessed with the American Orthopaedic Foot Ankle Society (AOFAS) midfoot score and a Visual Analog Scale (VAS). A Wilcoxon Signed Rank test was used to assess whether plantar pressure and foot position variables differed between the injured and uninjured foot. Correlations between outcome data were identified using Spearman Rank Correlation.
Results: With respect to the plantar pressure analysis, a reduced contact time of the forefoot was found for the injured foot compared with the contralateral side (p = 0.045). The injured side showed reduced contact surface of the forefoot (p = 0.048) and an increased contact surface for the midfoot (p = 0.019). The latter was paralleled by higher maximum pressures at the midfoot (p = 0.016). Patients reported a median score of 101 for the SF-36, 72 for the AOFAS midfoot score, and 7 for the VAS.
Conclusion: Plantar pressure measurements showed an adjusted walking pattern. Despite a fair outcome score, the quality for life of patients following a Lisfranc fracture dislocation returned to normal compared with normative data for the general population.