Below: S4 shows the space between Nos. 32 and 31, S5 shows the space between Nos. 31 and 41, and S6 shows the space between Nos. 41 and 42. Images from "Influence on interradicular bone volume of ...

Bone volume (BV/TV, %), defined as the proportion of total volume of the interradicular space at the level of the lower first molar (including periodontal ligament) occupied by cancellous bone.

When patients with adult tooth crowding seek clear aligner treatment, creating space and improving their bone system are key markers of treatment success. Researchers used cone-beam CT (CBCT) to see ...