Pierre Robin sequence

Overview

Board takeaway: Assess current obstruction, sleep apnea, and previous airway surgery before sedation or general anesthesia; plan rescue and recovery with pediatric anesthesia.

Micrognathia leads to glossoptosis and upper-airway obstruction. A U-shaped cleft palate is frequently associated; current airway difficulty varies.

How does Pierre Robin sequence affect dental management?

• Initial assessment: OSA evaluation; airway assessment before any sedation
• Current risk: Review the current airway rather than assuming mandibular growth or prior surgery has eliminated risk.
• Anesthesia plan: Select sedation depth, setting, airway rescue, and postoperative monitoring with pediatric anesthesia; significant obstruction or difficult intubation requires an appropriately equipped team, often hospital-based.
• Team care: Coordinate with the cleft and craniofacial team for palate repair and orthodontics

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Do not assume growth or earlier surgery has removed risk. Significant or uncertain difficult-airway risk during extensive dental treatment requires pediatric anesthesia planning with adequate rescue and recovery support, often hospital care.

Exam pearl

What is Pierre Robin sequence?

A developmental sequence in which a small lower jaw (micrognathia) allows the tongue to fall backward (glossoptosis), causing upper-airway obstruction; a cleft palate is frequently associated.

What are the main systemic features of Pierre Robin sequence?

• Associated conditions: Isolated (~40%) or syndromic: Stickler (most common), 22q11.2 deletion, Treacher Collins
• Infant presentation: obstructive apnea, feeding difficulty, failure to thrive, GERD
• Airway management options: a specialist-prescribed positioning plan, nasopharyngeal airway, tongue-lip adhesion, mandibular distraction, or tracheostomy. Prone positioning is a medical exception for selected infants with obstruction, not routine home safe-sleep advice.
• Growth: Mandibular catch-up growth occurs in many but not all patients

What oral findings occur in Pierre Robin sequence?

• Cleft: Wide U-shaped cleft of the soft (and hard) palate
• Occlusion: Severe Class II with mandibular retrognathia
• Other findings: Hypodontia, crowding, high palatal vault; natal teeth in some patients
• Erosion: Erosion from GERD

For Pierre Robin sequence, why is it a sequence?

• Triad: micrognathia, glossoptosis and upper-airway obstruction, often with a U-shaped cleft palate
• Micrognathia is the primary event, making it a sequence
• High tongue position blocks palatal closure
• Glossoptosis: tongue then falls back and obstructs the upper airway

For Pierre Robin sequence, what is your sedation plan for a 5-year-old with Pierre Robin sequence and many carious teeth?

1. Assess: first establish current OSA/obstruction, airway anatomy, prior surgery or intubation difficulty, and the extent of care.
2. Consult: consult pediatric anesthesia before choosing sedation.
3. Choose the setting: for extensive treatment with a significant or uncertain difficult airway, arrange hospital-based general anesthesia with an experienced pediatric airway team and a recovery/monitoring plan.
4. Check capability: avoid an office plan that cannot provide the required rescue and postoperative support.
5. While arranging care: use prevention or interim treatment while definitive care is arranged when clinically appropriate.

Sources

• AAPD dental guidance: AAPD: Monitoring and management of pediatric sedation
• Supplemental systemic features: MedlinePlus: Pierre Robin sequence
• Supplemental study guide: Pediatric Dental Study Guide: Pierre Robin Sequence
• Policy on the Management of Patients with Cleft Lip/Palate and Other Craniofacial Anomalies
• Policy on Obstructive Sleep Apnea (OSA)
• Pediatric Airway Assessment