Session 5 Expectations

Molar) needs more minimum force than a lower incisor with less root surface area. So a given force (eg. Step 3 210 grams per side x2= 420 grams) applied to lower 3-3 segment will move differently than Step 2 force, 150 grams per side x2 = 300 grams, applied to lower 4-4 segment that has more root surface than 3-3 segment. ................
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