Premium
Orthodontic Morphological Evaluation of Treacher Collins Syndrome
Author(s) -
UMEMURA Sachio
Publication year - 1999
Publication title -
congenital anomalies
Language(s) - English
Resource type - Journals
eISSN - 1741-4520
pISSN - 0914-3505
DOI - 10.1111/j.1741-4520.1999.tb00563.x
Subject(s) - medicine , skull , hypertelorism , undergrowth , treacher collins syndrome , mandible (arthropod mouthpart) , orbit (dynamics) , maxilla , anatomy , orthodontics , biology , ecology , botany , psychiatry , engineering , craniofacial , genus , aerospace engineering
To establish a treatment for Treacher Collins syndrome, the maxillocraniofacial morphology was quantitatively evaluated by means of cephalometric radiography and the following results were obtained. 1. The cranial base showed a small value of S‐ER’(length of sphenoid bone in anterior cranial base), S‐SOS’(length of sphenoid bone in posterior cranial base) and S‐Ba (length of posterior cranial base) in addition to similarly reduced NSBa, indicating undergrowth of the the cranial base as well. 2. Though the orbit had large BIOD and BIOD/W with ocular hypertelorism, no abnormal finding was obtained in the antero‐posterior positioning of the orbit in the skull. 3. In the maxillary region, the maxilla showed undergrowth but no abnormal finding was recorded on the vertical and antero‐posterior positioning of the mandible. 4. The mandible showed undergrowth with a wide mandibular angle. In conclusion, the morphology evaluated quantitatively in patients with Treacher Collins syndrome varied considerably. Therefore, it was considered essential to evaluate the morphology accurately for treating this syndrome including surgery and orthodontic treatment.