[Progress on tantalum rod implanting for the treatment of femur head necrosis].

Incorrect treatment for femur head necrosis can cause collapse of femoral head and tresult in severe harm for the patients (especially for the patient with middle-aged and young). The structure and mechanics characteristics of tantalum rod is similar to bone tissue, it higher strength and can adapt the internal environment of organism, so it has a large potency in treating femur head necrosis. Treatment of early femur head necrosis with tantalum rod implanting had alreadly widey applied at home and abroad, the method has the advantages of simple operation, little risk, less complication and beseems the patient with stage I - II of ARCO.

[Experimental study on the isolated culture of osteocytes and identification of osteoblasts in rats].

Objective: To establish a more stable method to isolate osteocytes in vitro, and then to find the differences with osteoblast biological characteristics.

Methods: Osteocytes and osteoblasts were isolated from the bone tissue of 3-day-old rats using sequential collagenase digestion. The cells were identified through cell morphology after 24 hours later.

[Influence of serum containing Liuwei Dihuang decoction (see text) on proliferation of osteoblasts under stretch-stress environment].

Objective: To study influence of serum containing Liuwei Dihuang decoction (see text) on proliferation and differentiation of osteoblast form neonatal SD rats cultured in vitro at different times and different stretch stress.

Methods: After osteoblast cultured for 24 hours in the serum containing Liuwei Dihuang decoction (see text) and serum in control group, the 0.5 Hz frequency, 6% and 12% stretch-stress were added.

[Relationship between the degree of displacement and the Baumnann angle in pediatric supracondylar humeral fractures].

Objective: To analyze the relationship between the degree of displacement and Baumann angle in pediatric supracondylar humeral fractures by using Excel, and to guide treatment for humeral fractures of children.

Methods: From July 2010 to July 2011,56 children with humeral supracondylar fractures were collected (34 boys and 22 girls, 15 patients with radial deviation and 41 patients with ulnar deviation,ranging in age from 3 to 14 years). The data of the patients about fracture displacement and the Baumann angle measured by MB-Ruler were input in Excel and then were analyzed to obtain data fitting curve.