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.
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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.
Litchi Pollen Collection and Storage Technology
The male flower spikes that are protruding from the anther but have not yet split open were collected. The filaments had not elongated, and the pollen was considered mature. These samples were placed in kraft paper envelopes and wrapped in plastic film to protect them. They were then stored in an environmental chamber at temperatures of 5°C, 8°C, or 12°C, and checked periodically for germination rates. A control group was kept at room temperature, between 20°C and 30°C, and the germination rate of pollen collected both when the anther was cracked and when it was not was tested.
The results showed that litchi pollen maintained a normal germination rate after being stored at 5–12°C for up to 50 days. However, after 75 days, the germination rate started to decline. When stored at room temperature, the germination rate of pollen remained similar to that of fresh pollen for the first three days, but dropped significantly after six days. Interestingly, the germination rate of pollen collected from anthers that had extended but not cracked was comparable to that of pollen from cracked anthers.
These findings suggest that early collection of litchi pollen can be effectively preserved at low temperatures (5–12°C) for several weeks, making it suitable for use in artificial pollination practices. This is particularly useful for managing pollination timing in orchards where environmental conditions may not always be ideal for natural pollination.