Q: How did minimally invasive total knee replacement evolve? A: Minimally invasive total knee arthroplasty emerged in the 1990s and has become a mature surgical technique with clear results after more than 20 years of development. It seeks to achieve shorter recovery time and better surgical outcomes with smaller incisions and less severe systemic reactions. Q: What are the characteristics of minimally invasive total knee replacement? A: Compared with traditional total knee replacement, minimally invasive total knee replacement has the following characteristics: (1) the length of the surgical incision is short, an average of 8-9cm (the average of the traditional surgical method is 14-16cm); (2) the knee joint can be functionally active at an early stage after the operation, and the joint function is better restored; (3) the degree of pain is reduced, and the bleeding of the operation is reduced; (4) the hospitalization time is shortened to 9 days, which reduces the medical cost. costs. Q: Which patients can have minimally invasive total knee replacement? A: It should be said that the vast majority of patients can undergo minimally invasive total knee replacement. However, patients with the following conditions should communicate with the surgeon in detail before surgery. (1) patients who are too obese, with BMI ≥ 30; (2) patients with severe osteoporosis; (3) patients with severe inversion, eversion or flexion deformity of the knee; (4) patients with previous knee-related trauma or surgical history.