Lecture 3- space analysis

Question 1

…. is defined as the distance around the arch circumference from the mesial of one permanent 1st molar to the mesial of the other one

Answer 1

space available

Question 2

What are the equations used for the Tanaka-Johnston method of predicting the size of unerupted canines/premolars

Answer 2

one half of the M-D width of the 4 lower incisors

+ 10.5mm= estimated width of mandibular canines/PM in one quadrant

+11mm= estimated width of maxillary canines/PM in one quadrant