Horizontal favourable and unfavourable fractures of mandible is best diagnosed by:

Law’s view (15º lateral oblique): Sagittal plane of the skull is parallel to the film and X-ray beam is projected 15 degrees cephalocaudal. Schuller’s or Rugnstrom view (30º lateral oblique): Similar to Law’s view, but cephalocaudal beam makes an angle of 30 degrees instead of 15 degrees.