Main Purpose
Figuring out if there will be enough room for permanent teeth . IT done early in the mixed dentition
Steps for completing the space analysis form
Definitions
| Term | Definition | Tips |
|---|---|---|
Space Available | The distancearound the arch circumference from the mesial of one permanent first molar to the mesial of the other permanent first molar. Measures as a serires of stright-line segments | |
| Space Required | Sum of the width of the incisors that have erupted plus the width of the canines and premolars that have not erupted | three main ways to accomplish the prediction : 1. Measurement of unerupted teeth in radiographs 2. Estimation of the width of the unerupted teeth from a correlation iwth the width of the reupted lower incisors 3. A combination of measurement on radiographs and correlation statistics |
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 ![[spaceanalysis_s01_p10_01.webp | Staley and Kerber Prediction Method: By using this graph, the size of the unerupted permanent premolars and canines can be estimated.]] |
Best Clincial Method
Tanaka & Johnston prediction method
- still has biases for caucasion population
Patients from different racial backgrounds
- three options when the above prediction formulas don’t apply
- Complete the space analysis anyways and just recognize the limitations
- Use a different prediction table or formula for your patient’s specific racial group
- Use the individualized radiographic technique