Evaluation of Maxillary Permanent Molars in Patients With Syndromic Craniosynostosis After Monobloc Osteotomy and Midface Advancement With Rigid External Distraction (RED)

摘要

Monobloc advancement has been used to correct midface deficiency in craniofacial syndromes (Ortiz-Monasterio et al., 1978; Ortiz-Monasterio and Fuente del Campo, 1979). This procedure and the Le Fort III osteotomy have been associated with molar tooth damage in the tuberosity region. Disruption of a normal tooth bud at any stage of development may have a significant effect on its final form and function as a component of the masticatory system (Santiago et al., 2005). Recently, monobloc advancement utilizing rigid external distraction (RED) has been successfully used for the correction of severe midface deficiency in cleft and craniofacial syndromes (Figueroa and Polley, 2007; Figueroa et al., 2001; Jensen et al., 2007; Polley and Figueroa, 1998; Polley et al., 1995; Satoh et al., 2003). In theory, the gradual nature of this process and the deposition of viable bone in the pterygomaxillary region could have a less deleterious effect and facilitate the eruption of the permanent molars. However, the effect of monobloc distraction on posterior maxillary teeth is unknown. Therefore, the purpose of this retrospective radiographic study is to analyze the effect of the monobloc osteotomy and the advancement with rigid external distraction (RED) on erupted and non-erupted maxillary permanent molars.