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Abstract

Objective:

The aim of this study was to compare the dentoskeletal pattern of Treacher Collins syndrome (TCS) and nonsyndromic Pierre Robin sequence (PRS).

Design:

Retrospective.

Setting:

Single center.

Patients:

Eighteen patients diagnosed with TCS (Group TCS) or PRS (Group PRS) in rehabilitation treatment at a single center. Group TCS was composed of 9 patients (4 male, 5 female) with a mean age of 12.9 years (standard deviation = 4.8). Group PRS was composed of 9 patients paired by age and sex with group TCS.

Main Outcome Measure(s):

Cone beam computed tomography–derived cephalometric images taken before the orthodontic or the orthodontic-surgical treatment were analyzed using Dolphin Imaging (Dolphin Imaging 11.0 & Management Solutions). Variables evaluating the cranial base, the maxillary and mandibular skeletal components, maxillomandibular relationship, the vertical components and the dentoalveolar region were measured. Intergroup comparisons were performed using t tests. The significance level considered was 5%.

Results:

Intergroup differences in the mandible size and growth pattern were observed. Group TCS showed a smaller mandibular length (Co-Go, Co-Gn) and a higher palatal plane (SN-Palatal Plane) and mandibular plane angles (SN-Go.Gn) compared to group PRS. No differences between TCS and PRS were observed for the sagittal position of the maxilla, maxillomandibular relationship, and dental components.

Conclusions:

Treacher Collins syndrome presented a decreased mandible and a more severe vertical growth pattern compared to PRS.

Keywords

cephalometry Pierre Robin sequence craniofacial morphology mandibulofacial dysostosis

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Comparison Between Treacher Collins Syndrome and Pierre Robin Sequence: A Cephalometric Study

Abstract

Objective:

Design:

Setting:

Patients:

Main Outcome Measure(s):

Results:

Conclusions:

Keywords

Get full access to this article

References

Supplementary Material