The influence of fronto-facial monobloc advancement on obstructive sleep apnea: An assessment of 109 syndromic craniosynostoses cases.

Obstructive sleep apnea syndrome is prevalent in children with syndromic craniosynostoses. Here we assessed the effects of fronto-facial monobloc advancement with internal distraction on obstructive sleep apnea in syndromic craniosynostoses. All patients managed for syndromic craniosynostosis over a period of 14 years were assessed based on apnea-hyponea index (AHI) before and after fronto-facial surgery. AHI values were analyzed using multivariate models with focuses on (1) absolute decrease in AHI values after fronto-facial surgery and (2) AHI normalization (AHI < 5) after fronto-facial surgery. One hundred and nine patients were included with 407 polysomnographic studies. Higher pre-operative AHI (p < 0.001) and pre-operative vault expansion (p = 0.008) were associated with more AHI decrease. Early airways surgery (p = 0.002) and fronto-facial surgery at older ages (p < 0.001) were associated with more AHI normalization. Our results indicate that fronto-facial surgery is specifically efficient in reducing severe (AHI > 20) obstructive sleep apnea in syndromic craniosynostoses. Early airways surgery, early vault expansion and fronto-facial surgery at older ages are recommended for better respiratory results. We provide support for a protocol involving (1) early posterior vault expansion and airways surgery and (2) fronto-facial advancement performed as late as possible (>2.5 years).