Subluxation of the Talocalcaneal Joint in Adults Who Have Symptomatic Flatfoot

摘要: Background: When flatfoot is acquired during adult-hood, the shape of foot changes. In addition to a decreased arch, there may be valgus angulation hindfoot or abduction forefoot, both. However, little objective information provide better understanding anatomical morphological changes that occur in adult flatfoot. We wondered if such an three-dimensional anatomy might shed light on pathway by which these occur. designed this study measure position talocalcaneal joint patients who have painful Methods: Computed tomography scans feet eight had symptomatic were used construct model articulation. The performed custom loading frame developed simulate weight-bearing with neutral while seventy-five-newton axial compressive load was applied. digital data from make computer models articular surfaces talus and calcaneus each foot. These then calculate percentage surface contact and, conversely, subluxated. Two modeled for bone; posterio facet formed one surface, anterior middle facets combined form second surface. compared, use Mann-Whitney nonparametric U analysis, those derived four without deformity served as controls. Results: A mean (and standard deviation) 68 ± 9 percent posterior compared 92 2 controls, 51 23 95 6 differences significant (p = 0.0066 both). Conclusions: Marked subluxation occurs some planoabductovalgus deformity.