The actual morphology of the unilateral defect / abnormality will depend on the type of cleft and the surgery carried out at lip and/or palate repair.
Alveolar cleft defects are usually broader at the nasal floor and narrower at the alveolar crest. The bony floor of the nose is missing on the affected side. Usually there is no intact soft tissue floor to the nose with the nasal mucosa occupying the alveolar cleft together with scar tissue and attached to anterior palatal mucosa.
Malformed, malpositioned, diminutive, and supernumerary teeth are commonly found within the alveolar cleft defect or in the adjacent alveolar bone. The most commonly affected teeth are the lateral incisors which may also be missing.
Oronasal fistulae are commonly found and may be located on the palatal side, labial or both. Their presence will be determined largely by the nature of the initial deformity and the initial surgery.