H. Miki et K. Masuhara, Arthrographic examination of the pseudocapsule of the hip after posterior dislocation of total hip arthroplasty, INT ORTHOP, 24(5), 2000, pp. 256-259
We examined the pseudocapsule in ten patients with posterior dislocation af
ter total hip arthroplasty (THA) using arthrography to investigate the rela
tionship between dislocation and the state of the pseudocapsule. The patter
n of contrast medium pooling demonstrated on tangential views was evaluated
, In five patients with early dislocation arthrography showed leakage indic
ating lack of pseudocapsule whereas there was no leakage in five patients w
ith late dislocation. Repeat arthrography revealed healing of the pseudocap
sule could progress by 6-8 weeks after dislocation. These findings suggest
that the difference in the pseudocapsule between those who dislocate early
and late may explain different clinical outcomes in the two groups.