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Craniofacial morphology and adolescent facial growth in Pierre Robin sequence.
Am J Orthod Dentofacial Orthop. 2010 Jun; 137(6):763-74.AJ

Abstract

INTRODUCTION

The purpose of this research was to analyze craniofacial morphology and adolescent facial growth in subjects with Pierre Robin sequence (PRS). The research was conducted at the Center for Craniofacial Care and Research at The Hospital for Sick Children, Toronto, Ontario, Canada, and the Burlington Facial Growth Research Center, Faculty of Dentistry, University of Toronto.

METHODS

Longitudinal lateral cephalometric tracings of 34 Caucasian subjects with nonsyndromic PRS were compared with those of unaffected control subjects, matched for age, sex, and ethnicity, and representing the range of occlusions in an untreated population. Cephalometric measurements were obtained before orthodontic treatment (age, 11.8 years) and after orthodontic treatment but before any surgical treatment (age, 16.6 years). Between-group differences of craniofacial measurements were analyzed with paired t-tests, and longitudinal growth differences were analyzed with analysis of variance (ANOVA) adjusted for the growth interval.

RESULTS

Significant differences were noted, with the PRS group showing smaller cranial base length, shorter maxillary and mandibular lengths, increased palatal and mandibular plane inclinations, and more open mandibular flexure. Mandibular body length and height were smaller as were ramal length and width, anterior basal thickness, and chin thickness. The ramus-to-body ratio was greater. With growth, greater gains in anterior face and symphyseal height were seen, but the mandible showed less closure of its internal flexure. The maxilla and the mandible remained retrusive during adolescent growth, and the maxilla became more retrognathic. Mandibular morphologic differences persisted in spite of additionally adjusting for cranial base length in the analysis.

CONCLUSIONS

Subjects with PRS had reduced cranial base and maxillary and mandibular lengths. Mandibular deficiency was most pronounced in the body. Due to bimaxillary retrognathism, the maxillomandibular dysplasia was not significant. A vertical growth pattern worsened the profile. There was no evidence of adolescent mandibular catch-up growth.

Authors+Show Affiliations

University of Toronto, The Hospital for Sick Children, Ontario, Canada. sunjaysuri@hotmail.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Multicenter Study

Language

eng

PubMed ID

20685531

Citation

Suri, Sunjay, et al. "Craniofacial Morphology and Adolescent Facial Growth in Pierre Robin Sequence." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 137, no. 6, 2010, pp. 763-74.
Suri S, Ross RB, Tompson BD. Craniofacial morphology and adolescent facial growth in Pierre Robin sequence. Am J Orthod Dentofacial Orthop. 2010;137(6):763-74.
Suri, S., Ross, R. B., & Tompson, B. D. (2010). Craniofacial morphology and adolescent facial growth in Pierre Robin sequence. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 137(6), 763-74. https://doi.org/10.1016/j.ajodo.2008.07.020
Suri S, Ross RB, Tompson BD. Craniofacial Morphology and Adolescent Facial Growth in Pierre Robin Sequence. Am J Orthod Dentofacial Orthop. 2010;137(6):763-74. PubMed PMID: 20685531.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Craniofacial morphology and adolescent facial growth in Pierre Robin sequence. AU - Suri,Sunjay, AU - Ross,R Bruce, AU - Tompson,Bryan D, PY - 2008/04/01/received PY - 2008/07/01/revised PY - 2008/07/01/accepted PY - 2010/8/6/entrez PY - 2010/8/6/pubmed PY - 2010/8/24/medline SP - 763 EP - 74 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 137 IS - 6 N2 - INTRODUCTION: The purpose of this research was to analyze craniofacial morphology and adolescent facial growth in subjects with Pierre Robin sequence (PRS). The research was conducted at the Center for Craniofacial Care and Research at The Hospital for Sick Children, Toronto, Ontario, Canada, and the Burlington Facial Growth Research Center, Faculty of Dentistry, University of Toronto. METHODS: Longitudinal lateral cephalometric tracings of 34 Caucasian subjects with nonsyndromic PRS were compared with those of unaffected control subjects, matched for age, sex, and ethnicity, and representing the range of occlusions in an untreated population. Cephalometric measurements were obtained before orthodontic treatment (age, 11.8 years) and after orthodontic treatment but before any surgical treatment (age, 16.6 years). Between-group differences of craniofacial measurements were analyzed with paired t-tests, and longitudinal growth differences were analyzed with analysis of variance (ANOVA) adjusted for the growth interval. RESULTS: Significant differences were noted, with the PRS group showing smaller cranial base length, shorter maxillary and mandibular lengths, increased palatal and mandibular plane inclinations, and more open mandibular flexure. Mandibular body length and height were smaller as were ramal length and width, anterior basal thickness, and chin thickness. The ramus-to-body ratio was greater. With growth, greater gains in anterior face and symphyseal height were seen, but the mandible showed less closure of its internal flexure. The maxilla and the mandible remained retrusive during adolescent growth, and the maxilla became more retrognathic. Mandibular morphologic differences persisted in spite of additionally adjusting for cranial base length in the analysis. CONCLUSIONS: Subjects with PRS had reduced cranial base and maxillary and mandibular lengths. Mandibular deficiency was most pronounced in the body. Due to bimaxillary retrognathism, the maxillomandibular dysplasia was not significant. A vertical growth pattern worsened the profile. There was no evidence of adolescent mandibular catch-up growth. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/20685531/Craniofacial_morphology_and_adolescent_facial_growth_in_Pierre_Robin_sequence_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(10)00186-1 DB - PRIME DP - Unbound Medicine ER -