Patent ID: 8277217

Claim:
A dental instrument for cutting soft tissue, the dental instrument comprising: a main body having an inlet hole through which cut soft tissue is input; a blade provided at the main body, at least a portion of the blade protruding to an outside through the inlet hole to define a cutting depth according to a protruding length; and a cover covering an upper portion of the main body, wherein the blade comprises: a first blade having a first protruding length defining a first cutting depth; and a second blade having a second protruding length defining a second cutting depth, the first and second blades being disposed adjacent to each other and in a row along a cutting direction, the second protruding length being smaller than the first protruding length, thereby defining the second cutting depth to be smaller than the first cutting depth, wherein the cover has an exhaust hole through which the soft tissue input through the inlet hole is exhausted, and wherein a blade installation portion recessively formed in an area including the inlet hole is provided at the main body, and a protruding portion protruding from an area including the exhaust hole to be engaged with the blade installation portion is provided at the cover.