RESUMO
A case of medial subtalar dislocation associated with fracture of the posterior process of the talus is described. Although this injury pattern is uncommon, it is important to recognize the associated fracture, as it involves a weightbearing articular surface. In this case, the flexor hallucis longus also prevented anatomic closed reduction necessitating open reduction and internal fixation.
Assuntos
Fraturas Expostas/complicações , Luxações Articulares/complicações , Articulação Talocalcânea/lesões , Tálus/lesões , Adulto , Fixação Interna de Fraturas/instrumentação , Fixação Interna de Fraturas/métodos , Consolidação da Fratura/fisiologia , Fraturas Expostas/diagnóstico por imagem , Fraturas Expostas/cirurgia , Humanos , Luxações Articulares/diagnóstico por imagem , Masculino , Radiografia , Amplitude de Movimento Articular , Tálus/diagnóstico por imagemRESUMO
Estrogen has profound effects on the regulation of bone metabolism, but its role in fracture healing is unknown. Several recent reports have documented the presence of estrogen receptors in vitro and in diseased tissue. The authors investigated estrogen receptors in nonneoplastic skeletal tissues by immunohistochemical and radioligand binding techniques. Using a fibular osteotomy model of fracture healing in New Zealand rabbits, radioligand binding detected specific, high affinity, saturable estradiol binding sites at low levels throughout fracture healing, with a trend towards a bimodal distribution. Peaks occurred three and 16 days after osteotomy. No estrogen receptor was found by either method in later fracture callus, growth plate, or periosteum. These findings suggest a possible role for estrogen in the early inductive phase and later phase of endochondral ossification in fracture healing.
