Rett syndrome

Overview

Board takeaway: Review seizures, aspiration, breathing patterns, and QT-related drug risk before sedation; use established communication and caregiver-assisted prevention.

How does Rett syndrome affect dental management?

• Communication: Use the child's communication method (eye gaze, devices); they often understand more than they can show
• QT interval: obtain cardiology review before using QT-prolonging drugs, including some antibiotics (such as macrolides) and antiemetics (such as ondansetron).
• Procedural safety: Seizure precautions; assess swallowing and aspiration risk before sedation; scoliosis affects positioning
• Wear protection: Monitor wear; occlusal guards are rarely tolerated
• Prevention: Caregiver-assisted brushing with fluoride

Exam pearl

What is Rett syndrome?

A neurodevelopmental disorder, usually involving MECP2, with early developmental regression, loss of purposeful hand use and speech, and characteristic repetitive hand movements.

What are the main systemic features of Rett syndrome?

• Genetics: MECP2 mutation, X-linked dominant; almost all girls (~1 in 10,000); mostly de novo
• Developmental course: Typical development to 6–18 months, then regression: loss of purposeful hand use and speech, deceleration of head growth
• Movement: Stereotypic hand wringing, washing or mouthing; gait apraxia
• Medical risks: Seizures (~80%), breathing irregularities while awake (breath-holding, hyperventilation), scoliosis, GI dysmotility
• Cardiac risk: Prolonged QT interval and risk of sudden death

What oral findings occur in Rett syndrome?

• Wear: Bruxism, often severe, with attrition
• Habits and occlusion: Hand mouthing; drooling; mouth breathing and anterior open bite
• Disease risk: Gingivitis and caries from caregiver-dependent hygiene and medications; GERD erosion

For Rett syndrome, what do you review before sedation?

• Seizures and anticonvulsants
• Breathing irregularities: breath-holding, hyperventilation; aspiration risk
• Scoliosis affecting positioning
• Cardiac history/ECG and QT-prolonging medicines: breathing and seizure review alone is incomplete; coordinate medication choice and monitoring with the medical/anesthesia team
• Recovery: establish respiratory monitoring and safe return to the child’s usual responsiveness and swallowing

Sources

• AAPD dental guidance: AAPD: Monitoring and management of pediatric sedation
• Supplemental systemic features: MedlinePlus Genetics: rett syndrome
• Supplemental study guide: Pediatric Dental Study Guide: Rett Syndrome
• Management of Dental Patients with Special Health Care Needs
• Behavior Guidance for the Pediatric Dental Patient
• Pediatric Airway Assessment