Femoral head necrosis is a disease that scares patients and causes headaches for doctors. Its causes are multifaceted, the more recognized ones being trauma, alcohol, hormones, etc. Studies of the natural history of the disease show that about 80% of cases of head necrosis without effective treatment will result in collapse of the femoral head 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. The long-term outcome of artificial joint replacement in young and middle-aged people is still unpredictable, so it is very important to preserve the patient’s own joints as much as possible. Early diagnosis and scientific treatment are the keys to improve the efficacy of joint preservation therapy. If femoral head necrosis is identified, it should be treated actively and effectively as soon as possible. Conservative treatment is mainly adapted to early patients whose femoral head is not deformed. Conservative treatment can only be considered as a kind of care and health care, and not as a treatment method, so conservative treatment does not play a role in treating femoral head necrosis. Its methods include: weight-bearing restriction, bed rest with traction, prevention and treatment of osteoporosis, blood circulation, blood stasis and Chinese medicine, and physical therapy. 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 irresponsible doctors who say that taking medicine can cure them, they start to take medicine for several months to several years, and in the end, they spend less money and their joints are ruined. Depending on the degree of development of the lesion, the treatment method is different for each patient. For patients with uncollapsed or slightly collapsed femoral head in the early and middle stages, minimally invasive bracing surgery is now used in clinical practice. The various bone flap implantations that were widely used in the 1980s and 1990s 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 smaller incisions 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. Liu Yewen of the hip injury department of Luoyang Orthopaedic Hospital in Henan Province has scholars applying multiple hollow titanium alloy screws implantation support, titanium alloy mesh and various braces with bone graft support; calcium phosphate bone cement, bBMP-collagen-coral 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. The damage to the original tissues is also minimized in the treatment, reducing the medically induced damage to a minimum and not affecting further surgery. The porous tantalum implant offers a new option for the early clinical treatment of femoral head necrosis and is made by Zimmer. The porous tantalum implant is designed as a 10 mm diameter cylinder, 70-130 mm long (in 5 mm increments), with a 25 mm long and 14 mm thick threaded end section. This design provides high friction with the bone and stabilizes the implant in position, while the hemispherical tip is used to resist pressure and support the subchondral bone plate. The bone elastic modulus of porous tantalum is comparable to that of human fibula and has the ability to withstand physiological loads. Three-dimensional finite element modeling studies have more conclusively demonstrated that porous tantalum supports the femoral head similarly to a fibular implant, and have found that: (1) porous tantalum has the same modulus of elasticity as bone, so it has the same stress and strain patterns within the femoral head and can provide good support; (2) porous tantalum is primarily subject to pressure, not bending or tension; and (3) the optimal location for porous tantalum implantation is on the upper lateral side of the femur so that it can contact and support the subchondral bone plate. 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 four times its body weight. Recent applications have shown satisfactory early clinical results with porous tantalum implants for the treatment of early femoral head necrosis. After the introduction of trabecular tantalum metal reconstructive rod implantation into our department, it has won favorable comments from patients, and we published the first article on early treatment of femoral head necrosis with trabecular tantalum metal reconstructive rod implantation in a domestic professional core journal and caused a sensation in the orthopedic class. This technique has a good therapeutic effect on early and mid-stage femoral head necrosis, which can reduce intraosseous pressure, improve blood supply to the femoral head, promote bone tissue regeneration, prevent or delay the collapse of the femoral head, has simple surgery, little trauma, less bleeding, does not destroy the blood flow of the femoral head, does not affect the stability of the hip joint, the high porosity of the trabecular structure is favorable to the growth of bone tissue and soft tissue, and promotes the revascularization of the necrotic area. It is conducive to the repair and reconstruction of femoral head necrosis, fast recovery, less impact on work and life, etc., which accelerates the recovery of patients and is in line with the development trend of minimally invasive surgery.