Oral diseases | 2021
Oral parafunction and bruxism in Rett syndrome and associated factors: an observational study.
Abstract
OBJECTIVES\nTo explore patterns of parafunction, and bruxism, and its relationships with genotype and snoring in individuals with Rett syndrome (RTT).\n\n\nMETHODS\nRetrospective observational data of those with confirmed MECP2 mutations in the InterRett database (n=216) was used to investigate experience of parafunctional habits, and bruxism and their relationships with genotype and snoring using multivariable linear regression.\n\n\nRESULTS\nThe prevalence of parafunction was 98.2%. Bruxism was reported (66.2%) with the patterns mostly both diurnal and nocturnal (44.1%) and exclusively diurnal (42.7%). Compared to individuals with C-terminal deletion, individuals with p.Arg106Trp mutations were less likely to have bruxism reported (aOR=0.15; 95% CI 0.02-0.98, p=0.05) and those with p.Arg168* mutation were more likely to have frequent bruxism than none or occasional bruxism reported (aROR 3.4; 95% CI 1.1-10.7 p=0.04). The relative odds of having nocturnal bruxism constantly, compared to none/occasionally, was higher among those always snoring (aROR 6.24; 95% CI 2.1-18.2, p=0.001) than those with no snoring.\n\n\nCONCLUSIONS\nThere appeared to be genotypic association with bruxism in p.Arg168* and p.Arg106Trp mutations and association between nocturnal bruxism and frequent snoring in an international sample of individuals with RTT. Clinical significance of the high prevalence of bruxism should be highlighted in relation to difficulty communicating pain and increased dental treatment need in RTT.