PMID: 8614725Jan 1, 1996Paper

Computed tomography and magnetic resonance in the follow-up to interventions for the prosthetic replacement of the carpal bones

La Radiologia medica
F GinolfiA Rotondo

Abstract

The authors examined with CT and MRI 12 patients submitted to prosthetic replacement of necrotic carpal bones--7 of them because of scaphoid proximal pole posttraumatic osteonecrosis and 5 because of lunate Kienböck's disease. The prosthetic implants were autologous in all patients: they were taken from palmaris gracilis tendon and modified to give them a rounded shape, to adapt them to the new anatomic site. All patients exhibited postoperative limitation in flexion-extension movements; 5 of them reported associated wrist pain. The authors investigated the anatomic reasons of the postoperative symptoms and tried to assess CT and MR diagnostic capabilities in depicting these conditions. CT was performed with thin sections (1.5 mm) and multiplanar reconstructions, with a Philips Tomoscan LX unit. MRI was performed with a GE MR Max Plus unit at 0.5 T and a Medical Advances transmit-receiving extremity coil, on the axial, coronal and sagittal planes, with T1- and T2-weighted sequences. All patients had been submitted to conventional radiography of the wrist. In 6 patients CT and MRI showed severe synovial reaction in the surgical site, with new ligament absorption in 5 of them. In 5 of these patients CT identified some nodular cal...Continue Reading

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