One is fast fertilizer efficiency. Ammonium bicarbonate belongs to ammonium nitrogen fertilizer, which can be directly absorbed and utilized by crops after being applied to the soil. Under normal circumstances, if urea is applied to the soil, it needs to be completely converted into ammonium nitrogen. It takes 7-10 days when the ground temperature is 10℃, 4~5 days when 20℃, and 2~3 when 30℃ day. It can be seen that the topdressing of crops in winter or early spring, the application of ammonium bicarbonate is better than urea. Second, ammonium bicarbonate with high utilization rate rarely volatilizes when the temperature is lower than 20°C. After being applied to the soil, ammonium ions can be quickly adsorbed by soil colloids, and its adsorption capacity is 8 times that of urea. Therefore, it is not easy to lose with water. After urea is applied to the soil, it exists in a molecular state before it is converted into ammonium nitrogen, which is difficult to be adsorbed by soil colloids and is easy to lose. ' The third is the ****** test shows that topdressing ammonium bicarbonate in winter wheat fields, the effect is 1 to 1.5 times higher than that in high temperature seasons. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
In hip joint replacement surgery, can be broadly divided into two kinds,cemented artificial hip and cementless artificial hip, due to the selection of different materials, the price is also very different.
Total cementless hip system indications
1.The main purpose of total hip replacement is to relieve hip pain,and the second is to improve hip function. The main indication for total hip arthroplasty is hip pain caused by hip lesion over 60 years old,which can not be used for other operations but only for head and neck resection.
2.Replacement surgery may be considered in patients over 45 years of age with subluxation of the hip,traumatic arthritis, pain, or loss of function.Due to the insufficient depth of the acetabulum,the upper margin of the acetabulum is inclined, which affects the stability of the acetabulum cup,and the acetabulum should be deepened or covered.
3.Indications of the need for replacement include hip pain due to loosening of the prosthesis,stem fracture,prosthesis dislocation, manual reduction failure,central dislocation caused by acetabulum wear caused by prosthesis and pain.
hip joint,hip replacement,total hip replacement,hip surgery Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.aomedortho.com
Generally , the cemented type is suitable for osteoporosis, poor bone conditions, 65 to 70 years of age and older patients. The use of bone cement for artificial hip joints allows for early mobility, which is also suitable for older patients. In addition, elderly patients are generally less active, artificial joint wear is also light, replacement of an artificial joint can be, generally need less revision. The price of bone cement type artificial joint is low.
Cementless type is also known as biological fixation type, suitable for young and middle-aged patients with good bone conditions, such artificial joints have micropores or biological coating materials on the surface, bone can grow into it to achieve the role of fixing artificial joints, so it is often called biological fixation type. Cementless artificial hip joints allow their bones to slowly grow together with the artificial joint to achieve a fixed role.