Figure 3. Distribution for degree and direction of collapse in patients with palatal collapse.

Number of responders shown in brackets. Three patients could not be classified in this Venn diagram as they showed doubtful complete concentric collapse at the level of the palate (CCCp) (2 complete collapse, of which 1 responder and 1 partial collapse, of which 1 responder). Venn diagrams for the other collapse sites are shown in the supplemental material (Figure S2).