s / Gait & Posture 39S (2014) S1–S141 S35 Fig. 1. X-ray showing the resected fibula. Fig. 2. X-ray showing the reconstructed mandibula. area as well as for large defects of long bones following trauma or tumor-related resection [2,3]. Several studies have evaluated the functional outcome and donor site complications following resection of the fibula e. a. [4,5]. Only one study performed a full three-dimensional gait analysis: one and three months postoperative [6]. The purpose of this study was to investigate possible gait disturbances after resection of the fibula using preoperative and one year postoperative gait analysis. Patients/materials and methods: In this study data of nine patients (mean age: 43.4 (14.8) years, four men, five women) were analysed. The fibula was used as donor site for the reconstruction of the face in seven patients and for the reconstruction of the humerus in two patients. Patients underwent a standardized clinical exam and three-dimensional gait analysis preand after 10.5 (5.3)months postoperatively. Kinematic, kinetic and time-distance parameters were calculated for the involved and non-involved leg. Statistical analyses were performed with non-parametric tests (Figs. 1 and 2). Results: The analysis of the kinematic parameters showed a significant increase in hip extension (∼6◦) and a decrease in hip flexion (∼6◦) in both legs during gait (p<0.038). For the involved leg a small decrease (∼3◦) in maximal plantarflexion was found (p=0.021), which led to a decrease in the maximal plantarflexion moment and power (p=0.051). No differences were found in the kinematics of the knee, kinetics of hip and knee or the time-space parameters (stride length, stride time and speed). Discussion and conclusions: The changes in the hip kinematics are likely the result of an offset in pelvic tilt induced by marker placement at the pelvis which is transferred as an offset onto the hip motion. Further, the results found in this study correspond to the work of Lee et al. [6], who found small differences one month postoperatively and a reduced peak plantarflexion in swing three monthspostoperatively. Thedifferenceswhichwere foundare clinically not relevant and the reduced plantarflexion can likely be Chart 1. Foot progression angle in spastic diaplegia CP subjects before surgical correction (blue) and at follow up (green), with normal values (orange) with 95% confidence intervals. normalized by therapy and training. This is also shown by a longterm follow-up studywhich showednodifferences in anklemotion and moments after 33 months [7]. In conclusion, resection of the fibula for reconstruction surgery does not influence gait one year after operation.