Short mandible - a possible risk factor for cleft palate with/without a cleft lip

Area of Science:

• Craniofacial development
• Pediatric genetics
• Congenital anomalies

Background:

• Cleft lip and palate (CLP) are common congenital anomalies.
• The etiology of CLP is multifactorial, involving genetic and environmental factors.
• Mandibular hypoplasia may play a role in the development of cleft palate.

Purpose of the Study:

• To investigate the association between mandibular length and the risk of cleft palate (CP) with or without cleft lip.
• To quantify the influence of a short mandible on CP development.

Main Methods:

• Retrospective study of 115 infants with CP and 70 controls with unilateral incomplete cleft lip (UICL).
• Cephalometric X-rays were used to measure mandibular length (Lm).
• Mandibular length was corrected for body length (Lmc) and analyzed using logistic regression.

Main Results:

• Infants with CP exhibited a mean mandibular length approximately 4 mm shorter than controls.
• A statistically significant association was found between reduced mandibular length and increased CP risk.
• The odds ratio (OR) indicated a 58% increased risk of CP for every 1 mm decrease in corrected mandibular length (95% CI: 0.48-0.68).

Conclusions:

• A short mandible, as part of a specific facial type, is identified as a potential risk factor for cleft palate.
• The findings suggest a quantifiable relationship between mandibular hypoplasia and cleft palate development.