Frontal Knee Alignment: Three-dimensional Marker Positions and Clinical Assessment

A frontal projection-type three-dimensional display.

In a typical auto-stereoscopic three-dimensional display, the parallax barrier or lenticular lens is located in front of the display device. However, in a projection-type auto-stereoscopic display, such optical components make it difficult to display elemental images on the screen or to reconstruct a three-dimensional image, even though a projection-type display has many advantages. Therefore, ...

Significance of Alignment Positions

Association of frontal plane knee alignment with foot posture in patients with medial knee osteoarthritis

BACKGROUND To examine the association of radiographic frontal plane knee alignment with three-dimensional foot posture in patients with medial knee osteoarthritis (OA). METHODS Participants in orthopedic clinics with Kellgren/Lawrence (K/L) grade ≥1 (88 patients and 88 knees; age, 61-91 years; 65.9% female) were enrolled. An anteroposterior radiographic view was used to assess the anatomical ...

Re: Three-dimensional analysis of alignment error in using femoral intramedullary guides in unicompartmental knee arthroplasty.

We used computerized simulations with 3-dimensional models of 20 cadaver femora, calculated from computed tomographic scans, and a model of a rod measuring 200 x 5 mm to study femoral alignment accuracy for unicompartmental knee arthroplasty via minimally invasive reconstruction. The anatomical axis and insertion site were identified on each femur. A simulation of all feasible flexion-extension...

Influence of sitting and prone lying positions on proprioceptive knee assessment score in early knee osteoarthritis.

BACKGROUND Knee proprioception is compromised in knee osteoarthritis. There are several ways of measuring proprioceptive acuity, but there is lack of consensus over the ideal testing position. The study aimed to evaluate the influence of 2 testing positions (sitting versus prone lying) on proprioceptive knee assessment score in patients with early knee osteoarthritis. METHODS The study includ...