[Study on correlation between bone marrow edema and osteoporosis in patients with severe knee osteoarthritis].

Objective: To explore relationship between bone marrow edema(BME) and osteoporosis in patients with severe knee osteoarthritis.

Methods: Unmatched case-control study was conducted. Totally 160 patients with severe knee osteoarthritis who had undergone knee magnetic resonance imaging (MRI) and bone mineral density examination (BMD) from January 2020 to March 2021 were included.

[Comparative study on effect and safty of treating on calcaneus fractures with manipulative reduction with percutaneous K-wire fixation].

Objective: To explore the clinical effects and safty of manipulative reduction with percutaneous poking K-wire fixation for the treatment of the calcaneus fractures and analyze the indication of the minimal invasion.

Methods: From December 2008 to December 2011,135 closed calcaneal fractures cases were divided randomly into poking group and plate group, treated respectively by percutaneous poking reduction and operative reduction. In poking group, there were 69 cases (82 feet) including 60 males and 9 females, with an average age of (43.