METHOD AND APPARATUS FOR VARIABLE SPEED OSTEOTOMY

A method (100) and apparatus (800) for variable speed osteotomy. The method (100) comprises: controlling a bone saw to perform an osteotomy operation at a first speed in a first tissue (110); acquiring a power representation signal of the bone saw in the osteotomy operation process (120); processing the power representation signal so as to acquire a high frequency component and a low frequency component of the power representation signal (130); on the basis of a predefined threshold, performing denoising on the high frequency component, so as to obtain a denoised high frequency component (140); reconstructing the denoised high frequency component and the low frequency component to obtain a denoised power representation signal (150); determining, on the basis of the denoised power representation signal, whether the bone saw enters, from the first tissue, a second tissue which has different properties from the first tissue (170); and when determined that the bone saw enters the second tissue from the first tissue, controlling the bone saw to perform an osteotomy operation at a second speed in the second tissue (180).