Abstract: A method includes processing a first material using a working part having a working device and a prevention device, and using the prevention device to simultaneously prevent damage to a second material adjacent the first material. A method of processing a first material includes arranging a prevention device in a first position to prevent a working part having a working device and the prevention device from processing first and second materials, and arranging the prevention device in a second position to allow the working device to process the first material while the prevention device simultaneously prevents damage to a second material adjacent the first material.

Abstract: A surgical burr includes prevention part, a shaft and a working part including at least one cutting or grinding surface for processing of a material selected from a bone, a cartilage, a calcified tissue, a tooth and a foreign object within a patient body. The prevention part is configured to have a first position and a second position. In the first position, it at least partially prevents the cutting or grinding surface from processing the material, when a force applied to the prevention part is less than a predetermined amount of force. In the second position, it allows the cutting or grinding surface to process the material, when the force applied to the prevention part is equal or higher than the predetermined amount of force.

Abstract: Disclosed is a surgical burr. The surgical burr includes prevention means, attachment means and a working part including at least one working means for processing of a material selected from a bone, a cartilage, a calcified tissue, a tooth and a foreign object within a patient body, wherein the working means is selected from a grinding surface and flutes defining cutting edges. The prevention means is configured to have a first position and a second position. In the first position, it at least partially prevents the working means from processing the material, when a force applied to the prevention means is less than a predetermined amount of force. In the second position, it allows the working means to process the material, when the force applied to the prevention means is equal or higher than the predetermined amount of force.

Abstract: Disclosed is a medical device for separating a first tissue from a second tissue. The medical device includes: a longitudinal stem part; a footplate part extending from one end of the longitudinal stem part; wherein at least one fluid channel is arranged to the medical device for providing a pressurized fluid for the separation of the first tissue from the second tissue, and wherein the medical device includes an interface for coupling the medical device to a surgical instrument used in a medical operation in which the first and the second tissue are separated. The invention relates also to a medical system including the medical device and a method using the same.