1. Bolton Analysis measure
  • Mesial distal tooth distance 
  • An Overall Analysis measures the sum of mesio-distal width of all 12 (first molar to first molar) mandibular teeth and compares them to the 12 maxillary teeth. The overall ratio known to be 91.3%.[5] The Anterior analysis measures the sum of Mesio-distal width of front 6 mandibular teeth and compares them to maxillary teeth. The anterior ratio is known to be 77.2%. An overall ratio of more than 91.3% means that the mandibular teeth are bigger compare to normal. A ratio smaller than 91.3% would mean the mandibular teeth are smaller than normal. Anterior analysis follows the same principle. Having a different ratio than normal is referred to as Bolton discrepancy. If there are discrepancies in tooth width, alignment and intercuspation are obstructed.