HTO stands for high tibial osteotomy. High tibial osteotomy is mainly used to treat osteoarthritis of the knee, and in the case of osteoarthritis of the medial knee, the force line of the knee can be changed through osteotomy, thus relieving or even eliminating the patient’s pain. HTO can be divided into two ways: medial open and lateral closed results, and medial open osteotomy is currently the more popular procedure, which can This procedure changes the force line of the knee joint and the posterior tibial tilt angle to achieve the desired knee force line and mobility. The advantage of the lateral closed osteotomy is that the patient has a high healing rate after the osteotomy, but the osteotomy angle is not mastered strictly enough, so the medial tibial osteotomy is now commonly used for treatment.