Stem cell therapy in bilateral osteonecrosis: computer-assisted surgery versus conventional fluoroscopic technique on the contralateral side.

Purpose: Surgical management of osteonecrosis with core decompression with stem cell therapy is a new procedure. The technique is performed with fluoroscopic guidance. This study attempts to determine if computer-navigated technique can improve the procedure.

The natural progression of adult elbow osteonecrosis related to corticosteroid treatment.

Background: In patients with corticosteroid treatment, the elbow is a rare site of osteonecrosis; there is little information about the rate and risk factors of disease progression in symptomatic and asymptomatic elbows.

Question/purposes: We determined the delay between the beginning of corticosteroid treatment and different stages of osteonecrosis and which stage and dose of steroids influenced disease progression.

Methods: Osteonecrosis related to corticosteroids was diagnosed by MRI in 50 elbows of 35 adult patients.