Analysis of morphology and gait function after intraarticular calcaneal fracture.

Open reduction and internal fixation is suggested by an increasing number of investigators as preferable treatment of displaced intraarticular calcaneal fractures. Assuming that quasianatomical reduction coincides with adequate function, many surgeons rely on morphological parameters (standard radiography, computed tomography) to demonstrate the effectiveness of surgery by achieving an optimum restoration of calcaneal geometry and joint surfaces. In order to correlate morphologic parameters and functional assessment, a prospective study was performed on 45 patients after surgical treatment of intraarticular calcaneal fractures using standard radiographic and computed tomographic scores, clinical evaluation, and gait analysis (dynamic pedography). Mean follow-up time after reconstruction was 23 months (range 18-50). Although clinical evaluation and assessment of gait function corresponded well with each other, radiographic scores showed a poor to moderate correlation with functional evaluation (r = 0.29-0.62); this was probably due to the missing analysis of soft tissue parameters. The comparison of clinical results and gait parameters with the individual radiographical parameters allowed us to identify those factors, with the greatest influence seen on the functional prognosis (i.e., calcaneal width, arthrosis in the neighboring joints). Morphologic analysis after calcaneal reconstruction based on radiographic techniques cannot predict subsequent function or substitute for functional assessment. However, it does allow for practical conclusions for surgical strategy in primary osseous reconstruction or secondary corrections.