Visceral fat obesity predicts ossification of the posterior longitudinal ligament: annual health examination data-based evidence.

Background Context: Recent studies have demonstrated a close association between the development of ossification of the posterior longitudinal ligament (OPLL) and obesity. However, the association between OPLL and visceral fat obesity, which is prevalent in the Asian population, remains unexplored.

Purpose: To examine the impact of visceral fat obesity on the development of asymptomatic OPLL.

Stress on the posteromedial region of the proximal tibia increased over time after anterior cruciate ligament injury.

Purpose: Anterior cruciate ligament (ACL) injury induces anterior and rotatory instability of the knee. However, the effect of this instability on the stress distribution in the knee joint in living participants is not clear. The aim of this study was to compare the distribution pattern of subchondral bone density across the proximal tibia in the knees with and without ACL injury, and to investigate the correlation between the distribution patterns of the subchondral bone density and the duration of ACL-deficiency.