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Table 6 Classification of cleft lip and cleft palate malformations:

From: Oral cleft prevention program (OCPP)

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)

 
 

1) Total

 
 

2) Partial

 

Group IV.

Rare facial clefts

 
  1. Taken from Division of Plastic Surgery and Burns of the Department of Surgery of the University of Sao Paulo Medical School, Brazil (Spina et al., 1972).