Patient-reported outcome after patient-specific unicondylar knee arthroplasty for unicompartmental knee osteoarthritis.

Background: Unicondylar knee arthroplasty was introduced in the late 1960s and remains a topic of controversial discussion. Patient-specific instruments and patient-specific implants are not yet the standard of care. The question remains whether this time-consuming and costly technique can be beneficial for the patient.

DensiProbe Spine: a novel instrument for intraoperative measurement of bone density in transpedicular screw fixation.

Study Design: Cadaver study.

Objective: To determine bone strength in vertebrae by measuring peak breakaway torque or indentation force using custom-made pedicle probes.

Summary Of Background Data: Screw performance in dorsal spinal instrumentation is dependent on bone quality of the vertebral body.