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Table 2 Definition of reference points and variables

From: Changes of alveolar bone dehiscence and fenestration after augmented corticotomy-assisted orthodontic treatment: a CBCT evaluation

Reference points and variables Definition
Dehiscence Alveolar bone defect involving an alveolar margin 2 mm or greater and concurrent with a v-shaped BM
Fenestration A circumscribed defect on the alveolar bone exposing the root, not involving the alveolar crest
A CEJ at labial side
B Alveolar crest at labial side
C The coronal border of a fenestration
D The apical border of a fenestration
d (mm) The distance between A and B
d0 (mm) The distance between A and B at T0
d1 (mm) The distance between A and B at T1
f (mm) The distance between C and D
f0 (mm) The distance between C and D at T0
f1 (mm) The distance between C and D at T1
CPDC (mm) Critical point of d for dehiscence on CBCT, the value of d more than which the tooth was classified as dehiscence, otherwise it was considered healthy.
CPFC (mm) Critical point of f for fenestration on CBCT, the value of f more than which the tooth was classified as fenestration, otherwise it was considered healthy.