Ha ha! Silly boy, why are you studying this craniotomy? First, cut the skin of the head at the selected position of the head with a scalpel to expose the skull, select the joints of the skull, and slowly open the skull by using the vibration function of the vibrating needle. Craniotomy only leaves a slight scar on the skin of the head, which does not do much harm to the skull! Now that medicine is developed, craniotomy is not difficult! Believe in science and everything will be solved! ! !