KEY NOTES OF ORTHODONTICS FOR MDS

TOPIC: CLASSIFICATION OF MALOCCLUSIONS:

  • Zygoma (or) Key ridge corresponds Mesiobuccal root of upper 1st molar
  • A patient is having edge to edge or end on relation of first molar in permanent dentition with retroclined incisors.According to Angle’s classification this is Class II div I
  • Anterior crosssbites according to Dewey are classified in Angle’s class III as Type III
  • Transposition of teeth refers to Teeth erupted in unusual position
  • The term torsiversion refers to Rotation of teeth in their long axis
  • If the maxillary canines are placed forward to orbital plane, they are said to be in Protraction
  • In Ackerman-Profitt Classification outer envelope represents Alignment
  • The term surtrusion refers to the Upward movement of the working condyle as it moves away
  • Canine Class I relation is Distal inclines of lower cuspid contact with mesial inclines
  • A bimax protrusion is Forward placed upper and lower dental arches on normal skeletal bases
  • Skeletal classification of malocclusion is given by Paul Simon
  • In classifying molar relation in patient with premature loss of molar additional relation to be noted is Canine relation
  • Postnormal occlusion is Class II malocclusion
  • Transposition of teeth is most commonly seen in the region of Maxillary lateral incisor, canine and second premolar
  • Classification of malocclusion based on etiology Bennet
  • If tooth has not erupted to the line of occlusion it is called Infraversion