The current orthopaedic theory of tendon manipulation is still limited to the type and operation process, and no serious mechanical and pathological analysis has been conducted on the manipulation or therapy for joint function restoration. For the restoration of joint function, most of the techniques are used to push and shake the joints or to use joint function rehabilitation devices for passive flexion and extension of joints. Since the joint is moved back and forth in a short period of time, we tentatively call it kinetic therapy. Of course, the patient’s active joint flexion and extension is beneficial, so we will not discuss it here. As far as the power method prevails, I propose the concept of joint function rehabilitation therapy——static method, which is somewhat different from it. If we take the passive flexion and extension of a joint once as a cycle, then the static method makes the passive flexion and extension of a joint much less frequent. If we passively bend or extend a joint for a sustained period of time, then we consider this mode of manipulation or instrumentation to be a static method. Pan Liangchun, Department of Orthopaedics, Chengdu Orthopaedic Hospital Why do we need to introduce the static method? This is because the static method is safer and more effective than the dynamic method in the recovery of joint function. After the joint is fixed for a period of time, the soft tissues around the joint (STAJ) become adherent and contracted. When the bone structure of the joint is stabilized, the main treatment for restoring the function of the joint is to release the adhesions and contractures of the STAJ, which consists mainly of the joint capsule, bursa, ligaments and tendons, with contractures as the main component and adhesions as the secondary component. The way to deal with the contracture is to pull the contraction, and the way to deal with the adhesion is to pull the ligament. Passive flexion and extension of the joint is in essence the tension side of the STAJ. The implementation frequency of traditional manipulation such as shaking and stretching is generally not lower than 1Hz, while the trigger and pressure can be lower than 1Hz, so I will classify them as static manipulation. In the dynamic manipulation, STAJ is often at the end of passive flexion and extension, and its deformation has not yet reached its maximum. Soft tissues, being viscoelastic, have creeping properties, and a sustained force for a sufficient period of time is necessary to further increase the deformation. The hydrostatic maneuver is able to achieve the purpose of distraction contracture due to the long period, which shows that the hydrostatic method is an effective method. The stripping of adhesions can be done by the direct method ——pulling method and the indirect method ——pulling method. In the pulling method, the destruction of the junctional hoof tissue and the rupture of capillaries can lead to bleeding, while the back and forth activity of the dynamic manipulation in a short period of time can cause the scattered bleeding points to pool into a hematoma and communicate with the periosteum——which is the current speculation on the cause of ossifying myositis. Static manipulation is relatively less likely to cause scattered bleeding points to pool into a hematoma, which could theoretically reduce and avoid ossifying myositis, a feature that suggests the safety of the static method.