Patent ID: 9662179
Date: 2017-05-30
CPC Classifications: A61B,A61C

Claim:
1. An apparatus for correcting a three dimensional space-angle of a drill for a dental hand piece for a tooth structure including hard and soft tissues in an oral and maxillofacial area including a jawbone and teeth of a patient, comprising: 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 primarily correcting the angle of the housing measured by the first sensing unit with reference to the angle of the drill and secondarily correcting an angle of the drill, which is primarily corrected, with reference to an angle correcting value of the drill with respect to the tooth structure considering the angle measured by the second sensing unit, thereby calculating a three-dimensional space angle of the drill, wherein correcting with respect to the angle of the housing and the angle of the drill is performed by measuring the angle of the dental hand piece and the angle of the head portion or jaw of the patient in real-time, the correction being performed to correct the angle of the drill by measuring the angle of the dental hand piece in real-time using the following algorithm: where, the x, y, and z indicate orientation of the drill, the x′, y′, and z′ indicate orientation of the fixing unit of the dental hand piece, and the θ denotes an angle between a first imaginary line extending in a longitudinal direction of the fixing unit and a second imaginary line perpendicular to the drill; a setting unit for setting a reference three-dimensional space angle of the drill with respect to the tooth structure according to the correction; 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.