Apparatus and method for correcting three dimensional space-angle of drill for dental hand piece

An apparatus for correcting a three dimensional space-angle of a drill for a dental hand piece, including: a housing provided on a fixing unit of the dental hand piece; a first sensing unit for measuring an angle of the housing in real-time; a second sensing unit for measuring an angle of a head portion or jaw of the patient in real-time; an operating unit for calculating the three-dimensional space angle of the drill; a setting unit for setting a reference three-dimensional space angle of the drill with respect to the tooth structure as a three-dimensional space angle that the operator is wanting among the three-dimensional space angles of the operating unit; and a display unit for displaying an alert message when the three-dimensional space angle of the operating unit deviates from a predetermined range of the reference three-dimensional space angle.