A device for guiding a drilling of a femoral head of a femur in femoral headresurfacing comprises a body defining a guide channel adapted to receive andguide adrilling component therein. Arms are pivotally connected to the body andbiased toward oneanother, the arms each having a contact end extending below the body, thecontact endsadapted to contact a femoral neck when the body is in a hovering positionrelative to thefemoral head. Sensors produce a signal indicative of an orientation angle ofeach of thearms relative to the body. A processor unit calculates the orientation anglesof the armsfrom the signal, and evaluates from the orientation angles an alignment of thebody relativeto the femur. A visual output produces a visual signal representative of saidalignment. Amethod for aligning a drill guide device on a femur for subsequent drilling afemoral headwith a guide channel in the drill guide device is also provided.
