[Selection of placement position of support points for early and mid-term mechanical repair of femoral head necrosis].

Objective: To investigate the clinical efficacy of the placement of the main mechanical support points in the early and middle stages of mechanical repair of femoral head necrosis in preventing collapse of the femoral head.

Methods: A retrospective analysis was performed for 17 cases 22 hips of non-traumatic femoral head necrosis in the early and middle stages from June 2018 to June 2019, including 14 males 18 hips and 3 females 4 hips, aged 34 to 47 years old. Among them, 6 cases were hormonal, 8 were alcoholic and 3 were idiopathic.

Transcriptome analysis of differentially expressed genes in chrysanthemum RNA interference lines.

Unlabelled: DNA methylation is the most important epigenetic modification involved in many essential biological processes. is one of DNA methyltransferases that affect the level of methylation in the entire genome. To explore the effect of gene silencing on gene expression profile of  ×  'Zijingling'.

[Autogenous femoral head bone grafting combined with total hip arthroplasty for the treatment of old dislocation of hip joint center in 16 cases].

Objective: To study effects of autogenous femoral head bone grafting combined with total hip replacement for the treatment of old center dislocation of hip joint, and to evaluate the superiority of acetabular defect reconstruction with autogenous bone.

Methods: From March 2008 to December 2013, 16 patients (16 hips) with old center dislocation of hip joint were treated with autologous bone graft combined with total hip replacement. There were 11 males and 5 females, ranging in age from 41 to 72 years old, with an average of 56.