Femoral head necrosis is a serious disease that scares patients and causes headaches for doctors, with a long course, difficult treatment and serious consequences. If one is not alert enough to the dangers of osteonecrosis of the femoral head, the early stages of the disease are often not treated effectively and systematically, or even misdiagnosed, and eventually develop to the point of having to undergo joint replacement. The causes of femoral head necrosis are very many, the main reasons are: trauma, hormone abuse, excessive alcohol consumption, acetabular dysplasia, ankylosing spondylitis, etc. And the increase of vehicles and car accidents have increased the rate of femoral head necrosis after hip fracture, and it is getting younger and younger. And once femoral head necrosis occurs, 80% of patients will be difficult to reverse, if left to develop, the abductor and wheelchair will be lifelong companion. Studies of the natural history of the disease show that without effective treatment about 80% of femoral head necrosis will develop femoral head collapse within 0.5 to 3 years. Once the femoral head collapses (positive crescent sign), 87% of the hips will progress to the extent of requiring artificial joints within 24 months, which is very harmful to families and society. At present, there are many clinical methods to treat ischemic necrosis of the femoral head, including conservative treatment and surgery. Conservative treatment is mainly adapted to early patients with undeformed femoral head. Conservative treatment can only be regarded as a kind of care and health care, and not a treatment method, so conservative treatment does not play a role in treating femoral head necrosis. Its methods include: stopping the use of hormones, abstaining from alcohol, limiting weight-bearing, bed rest with traction, preventing and controlling osteoporosis, activating blood stasis and clearing the ligament herbs, physical therapy and other treatment methods. Many patients with osteonecrosis of the femoral head think that conservative treatment can cure them and do not want to undergo surgical intervention, so they run around in many places, and when they meet an irresponsible doctor who says that taking medicine can cure them, they start taking medicine for several months to several years, and in the end, they spend less money and their joints are ruined. Surgical treatment varies according to the degree of development of each patient, such as interventional surgery, decompression, bone flap implantation, stem cell implantation and hip replacement. For patients with uncollapsed or little collapsed femoral head in the early and middle stages, minimally invasive bracing surgery is now mostly used in clinical practice. The various bone flap implantations that were widely used in the 80s and 90s are rarely used nowadays because of the great damage and inaccurate efficacy, which affect the final joint replacement surgery. Minimally invasive brace surgery is to use a smaller incision to put in various stronger endosseous implants to support the femoral head without destroying the structure of the hip joint, to intervene early, to enhance the mechanical structure of the femoral head and to prevent collapse, and to focus on the compatibility of the endosseous implants with the human body and the application of bioactive materials. Some clinical scholars apply multiple hollow titanium alloy screws implant support, titanium alloy mesh and various braces with bone graft support; calcium phosphate bone cement, composite artificial bone and bioactive materials application. Reducing the intramedullary pressure and focusing on the immediate effect can serve the purpose of preventing collapse extremely well. In the treatment also minimizes the damage to the original tissues, reduces the medical source damage to a minimum, and does not affect other surgeries. At present, our hospital adopts the successful revascularization and reconstruction rod for early stage femoral head necrosis, which has been approved by the U.S. fda and China’s sfda, and has achieved good results. The recanalization reconstruction rod is made of tantalum metal, which has the characteristics of human cancellous bone structure, with large pores, close to the pore distance of human bone trabeculae, and its elasticity is also close to the elasticity of human bone, with good biological solubility, and is also known as “metal bone”. It not only allows blood vessels to pass through the gaps of the tantalum rods, providing a re-vascularization pathway to the necrotic area, but also enables human bone tissue to grow well into the pores of the metal tantalum rods, making the human bone and the metal tantalum rods become one, which has a good mechanical support effect on the femoral head that is about to collapse, achieving the therapeutic effect of delaying the collapse of the femoral head, postponing the time of total hip replacement or preventing patients with femoral head necrosis from undergoing total hip replacement. The therapeutic effect. Heiner et al. produced a model of femoral head necrosis and biomechanically tested and evaluated the strength and effectiveness of the porous tantalum implant in supporting the subchondral bone plate, showing an average 29% reduction in subchondral bone defects after implantation, and that the implant itself was 9.3 times stronger than the pressure applied to the femoral head after implantation and withstood fatigue tests at 4 times its body weight. Compared with traditional treatment methods, revascularization reconstruction rod implantation has a better therapeutic effect on early to mid-stage femoral head necrosis, reduces intraosseous pressure, improves blood supply to the femoral head, promotes bone tissue regeneration, prevents or delays the collapse of the femoral head, has simple surgery, less trauma, less bleeding, low complication rate, does not destroy the blood flow to the femoral head, does not affect the stability of the hip joint, high porosity of the trabecular structure It is conducive to the long entry of bone tissue and soft tissue, promotes the revascularization of necrotic area, facilitates the repair and reconstruction of femoral head necrosis, quick recovery, less impact on work and life, etc., which accelerates the recovery of patients.