1.What is hip joint replacement?
Replacement of damaged hip joints with artificial femoral heads, stems and acetabulums made of metal, polymer polyethylene materials, alloys, ceramics, etc.
2.What is the difference between total hip replacement and hemi-hip replacement?
Total hip replacement is to replace the femoral head and acetabulum, while hemi hip replacement is to replace the femoral head only.
3.What are the indications for hip replacement?
The main purpose is to relieve pain and improve the range of motion of the joint.
(1) Severe osteoarthritis of the hip joint, where non-surgical treatment cannot relieve the pain (3-6 months).
(2) Certain types of femoral neck and femoral head fractures with significant displacement and subhead type.
(3) Advanced femoral head necrosis.
(4) joint tuberculosis, septic infection cured for more than one year, with residual painful dysfunction.
(5) proximal femoral bone tumor.
(6) Other.
4.What are the causes of osteoarthritis of the hip joint, which may require hip joint replacement?
(1) Primary osteoarthritis.
(2) slipped epiphysis of the femoral head.
(3) Post-traumatic hip injury.
(4) rheumatoid arthritis.
(5) hip dysplasia.
(6) Femoral head necrosis.
(7) Other infectious arthritis.
5.How many people have hip replacements every year?
About 150,000 people in the United States each year, and the number in China is not clear.
6.How high is the success rate of hip replacement surgery?
The success rate is more than 95%, and the failure rate is about 1%. After 10 years, 90% or more are satisfied.
7.Does the patient have allergic reactions to the implanted prosthetic material?
Basically, there is no allergic reaction of human body to the prosthesis.
8.How is the joint prosthesis fixed to the bone?
It can be fixed with bone cement (polymethylmethacrylate) or without bone cement (biologic prosthesis), i.e., press-fit or biologic long entry prosthesis.
9.Does the fixation method affect the postoperative recovery?
Most patients are partially weight-bearing within 6 weeks after surgery. Theoretically, a cemented prosthesis can be fully weight-bearing after surgery, and the cement reaches 90% of its strength after 10-15 minutes of mixing. Biological type prosthesis (porous bone growing into the prosthesis) should be protected under partial weight-bearing for 12 weeks.
10.What is the difference between the postoperative rehabilitation of the lateral and posterior surgical approaches?
The lateral approach requires severing of the adductor muscle or trans-trochanteric osteotomy and requires at least 6-8 weeks of repair and healing time.
The posterior approach requires splitting the gluteus maximus muscle and cutting off the small external rotator muscle, which will lead to earlier rehabilitation and faster recovery, but is prone to posterior dislocation.
11.How long will the obvious pain be after hip replacement?
The pain is heavy 1-2 days after surgery, but most hospitals now have analgesic pumps to relieve pain, and then the pain gradually decreases and usually disappears completely in 2-3 weeks.
12.Can I resume sports after hip arthroplasty?
Most patients can resume low-energy sports, such as golf, doubles table tennis, bowling and walking. Basketball, volleyball and soccer should be avoided, as these sports may increase joint wear and tear.
13.How long can the total hip joint be used?
It varies from person to person, the 10-year excellent rate is over 90%, and the average joint preservation time is 20-25 years.
14.What are the most common reasons for hip joint replacement failure?
Loosening is the most common reason for failure, and young, athletic and obese patients are the high population. 5-30% loosening rate is found in 10-year X-ray.