165 - Dental Disturbances following Mandibular Distraction Osteogenesis in Children with Pierre Robin Sequence

Dental Disturbances following Mandibular Distraction Osteogenesis in Children with Pierre Robin Sequence

Chau MLS, Kerins CA, Park YJ, Maguire J, Hoffman JE (Texas A&M University College of Dentistry, Children’s Medical Center, Dallas, TX)

Purpose: To determine the presence of dental disturbances following mandibular distraction osteogenesis in children with Pierre Robin sequence.

Methods: A retrospective chart review was conducted of Pierre Robin sequence patients followed at Children’s Medical Center Dental and Orthodontic Clinics, and Craniofacial Team. Data was stratified by whether patients received mandibular distraction osteogenesis. Radiographs and notes were reviewed for dental disturbances, including calcification defects and changes in eruption, size, shape, and number.

Results: 17% of patients who did not receive MDO had dental disturbances, in comparison to 86% of patients who received MDO. There was a statistically significant difference in presence of dental disturbances (P <.001). The most frequently noted disturbances were quantitative enamel defects, affecting approximately 64% of the MDO patients. First permanent molars were most commonly affected.
Mean age at initial distraction was lower for patients with qualitative and quantitative enamel defects (P>.05). Mean age at initial distraction was higher for patients with disturbances in number, shape, and eruption (P>.05).

Conclusions: There was a higher presence of dental disturbances in Pierre Robin sequence patients who received MDO. First permanent molars were most commonly affected by distraction, followed by second permanent molars and second permanent premolars. Distraction was commonly associated with quantitative and qualitative enamel defects and disturbances in shape.