DIAGNOSIS & TREATMENT PLANNING

ANALYSIS OF THE DENTITION & OCCLUSION

• -BOLTON ANALYSIS• -SPACE ANALYSIS• -MIXED DENTITION ANALYSIS

Balance

• BETWEEN THE MESIODISTAL DIAMETER

( SIZE )

• OF MAXILLARY & MANDIBULAR TEETH

BOLTON TOOTH RATIO ANALYSIS

Bolton’s Tooth size ratio

• Overall ratio = mesiodistal width of all mand (12) teeth x 100 mesiodistal width of all max (12) teeth = 91.3 %

. Anterior ratio = mesiodistal width of all anterior mand (6) teeth x 100 mesiodistal width of all anterior max (6) teeth = 77.2 %

Crowding and spacing

Tooth size

Arch perimeter

Curve of spee measurement

MIXED DENTITION ANALYSIS

• -Estimate of the size of permanent canines and premolars

• -Estimate of the available space in permanent dentition

Mixed dentition

Mixed dentition

Huckaba’s Analysis

X Y

True width of premolar on cast x True width of primary molar on cast

True width of premolar on x-ray True width of primary molar on x- ray

x’ Y’

X = Y x X

Y’

Moyer’s prediction table

Digital models