STAGES OF MIXED DENTITION :-

FIRST TRANSITION STAGE [ 6 – 8 ]

 Erupting — C1, L1, 1st Molars
 Anomaly — anterior open bite
o — retrognathic mandible (12-14)
o — ∴ transient class 2
 At 8.5yrs old, there will be equal no of primary and permanent teeth in the mouth,
 Centrals, laterals and 1st molars-permanent
 Canines, 1st molar, 2nd molar-primary
 Incisal Liability
o Maxilla — 7mm
o Mandible — 5mm
 ∴ avg I L = 6 mm
 How is I L Obtained:
o utilising the physiologic spaces
o proclination of anterior
o increase in the inter – canine width