DEVELOPMENT OF OCCLUSION

 GUM PADS
 0-6 months of age
 Anterior open bite
 So such complaint of open mouth by mother at this age
o Rx — self correcting anomaly ! (SCA)

 NATAL TOOTH – tooth present at birth

 NEONATAL TOOTH — tooth formed within 15 –
30 days.
 Most common — mandibular (anterior) central incisor
 Syndrome — Rege fede syndrome
 Inability to suck milk —
 Nutritional deficiency
 Lower part of tongue irritation.

 ALVEOLAR RIDGE
Transverse grooves — it divides the gum pad into 10
segments for future eruption of the teeth.

CALCIFICATION DATES

 1st calcification seen at 14 weeks of IUL, max sinus develops
 12th week – mandible
 6-10weeks- palate
 4-6 weeks- lip
 In pedo root formation completes 1year after eruption

 As a general rule,
o four teeth erupt for every six months of life,
o mandibular teeth erupt before maxillary teeth,
o teeth erupt sooner in females than males.
o During primary dentition, the tooth buds of permanent teeth develop below the primary
teeth, close to the palate or tongue. Tooth bud is always — lingual / palatal and inferiorly
placed.