[Research status of correlation between type IX collagen gene and musculoskeletal diseases].

As an important component of articular cartilage, type IX collagen plays an important role in regulating homeostasis of bone and cartilage. The mutation or deletion of gene could disequilibrate homeostasis leads to deformity of corresponding bone and joint, and finally causes multiple epiphyseal dysplasia. Moreover, anatomic variation also leads to biomechanics change of corresponding functional unit, combine with micro-environment change caused by change of genes, osteoarthritis and disc degeneration were occurred under the function of stress over and over again.

[A comparative study on the measurement of femoral head necrosis lesions using ultra-thin layer slicing and computer aided identification].

Objective: To compare the differences between computer aided identification and ultra-thin layer slicing in measuring the lesions of femoral head necrosis,and to confirm the accuracy and practicability of computer aided method.

Methods: From June 2012 to December 2013, the X-ray and MRI of 24 patients (24 hips on unilateral) were reviewed, who had avascular necrosis of the femoral head (ANFA) at late stage (stage III and IV) according to the ARCO international staging system. There were 15 males and 9 females, with an average age of (65.

[Application of multispectral animal living imaging technology in evaluating osteoarthritis model].

Objective: To observe application value of multispectral animal living imaging technology in rats model of osteoarthritis.

Methods: Fifteen male SD rats weighed (180 +/- 20) g (3 months old) were received intra-articular injection of iodoacetic acid for establishing osteoarthritis. Articular cavity of left knee of rats were injected into 50 microl iodoacetic acid.