Effect of an Adjustable Hinged Operating Table on Lumbar Lordosis During Lumbar Surgery.

Study Design: Prospective observational study.

Objectives: Quantify the amount of lumbar lordosis achieved on a hinged operative table in neutral, flexion, and extension.

Summary Of Background Data: Hinged operative tables may allow surgeons to adjust lumbar spine positioning intraoperatively.

Should 25-hydroxyvitamin D and bone density using DXA be tested in adolescents with lumbar stress fractures of the pars interarticularis?

Study Design: Retrospective study.

Objective: To determine if 25-hydroxyvitamin D (25[OH]D) level measurement and bone mineral density (BMD) using dual-energy x-ray absorptiometry (DXA) are indicated in children with a history of stress fracture of the pars interarticularis.

Summary Of Background Data: Healing rates of 4%-25% for bilateral and unilateral pars fractures, respectively, have previously been reported.

Osteolytic lesion of the tibial diaphysis after cementless TKA.

Biomaterial wear debris is a known contributing factor in aseptic loosening of total joint prostheses, particularly when cementless tibial trays are used in total knee arthroplasty (TKA). Local inflammatory response can lead to osteolysis and aseptic loosening of implants. The resulting lesions require careful clinical evaluation.