The epidemiology of developmental dysplasia of the hip in Japan: Findings from a nationwide multi-center survey.

Background: It has been reported that the national incidence of developmental dysplasia of the hip (DDH) has decreased in Japan. This is because of prevention activities after birth since around 1970. However, cases of late-diagnosed DDH have still been noted in some children's hospitals.

Economic Impact of Venous Thromboembolism Following Major Orthopaedic Surgery in Japan.

Objectives: Venous thromboembolism (VTE) is the most frequent complication following major orthopaedic surgery (MOS). Although studies in Western populations have demonstrated significantly higher costs for patients with VTE versus those without VTE after MOS, there is a paucity of such data in Japan. This study was conducted to understand the costs and VTE rates in Japanese patients.

Characterization of human synovial fluid cells of 26 patients with osteoarthritis knee for cartilage repair therapy.

Aim: To investigate the possibility of chondrogenic differentiation and cartilage repair of synovial fluid cells of osteoarthritis (OA) knee.

Methods: Synovial fluids from 26 patients with OA knee were aspirated from each knee joint and cultured in vitro. The morphology of cultured synovial fluid cells, cell proliferation rate, the phenotype, and chondrogenic differentiation were analyzed in in vitro.