173 Unsuccessful submandibular duct surgery for anterior drooling: Surgical failure or parotid gland salivation? 8 Demographics of all patients are shown in Table 1. The majority of patients (n=8) suffered from cerebral palsy (CP) with a Gross Motor Function Classification System (GMFCS) score higher than 4. Almost all patients received previous treatment with Botulinum neurotoxin type A injections more than 6 months before the primary surgical intervention. Eight patients suffered from a severe speech disorder (classified as no speech, anarthria or very severe dysarthria), and six patients were at risk for antero-posterior drooling. There was significantly more severe dental malocclusion (50% vs. 21%, P value = 0.047) and severe speech disorder (80% vs. 42%, P value = 0.042) in the current cohort when compared to the reference cohort (table 2).
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