Patent ID: 8105346

Claim:
A medical handpiece comprising: a cutting tool having a flexible shank and a bur provided at the distal end of the shank, a tubular sheath receiving the cutting tool therein, and a handpiece body detachably holding the proximal end of the cutting tool and transmitting driving force from a drive source to the cutting tool, wherein said sheath and said cutting tool are made flexible, with said sheath being plastically deformable and the shank of said cutting tool being elastically deformable, said medical handpiece further comprising: a plurality of bearings arranged in said sheath, a plurality of first interposed members that are tubular and flexible and arranged proximal to, distal to, and between the bearings, and a plurality of second interposed members that are tubular and flexible and each arranged inside each first interposed member to be in partly sliding contact with the shank contained therein when the sheath is flexed.