Group I | Pre-incisor foramen clefts (Clefts lying anterior to the incisor foramen). Clefts of the lip with or without an alveolar cleft. | |
---|---|---|
 | a) Unilateral |  |
 | Right | Total – when they reach the alveolar arcade |
 | b) Bilateral | Partial |
 |  | 1) Total}On one or both sides |
 |  | 2) Partial |
 | c) Median | 1) Total |
 |  | 2) Partial |
Group II. | Trans – incisor foramen clefts (Clefts of the lip, alveolus and palate) | |
 | a) Unilateral | Right |
 |  | Left |
 | b) Bilateral |  |
Group III. | Post-incisor foramen clefts (Clefts lying posterior to the incisor foramen) | Â |
 | 1) Total |  |
 | 2) Partial |  |
Group IV. | Rare facial clefts | Â |