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2013 Apr-Jun; Vol 4, No 2:e5 |
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Maxillomandibular Advancement in Obstructive Sleep Apnea Syndrome Patients: A Restrospective Study on the Sagittal Cephalometric Variables J Oral Maxillofac Res 2013 (Apr-Jun);4(2):e5 doi:10.5037/jomr.2013.4205 |
Maxillomandibular Advancement in Obstructive Sleep Apnea Syndrome Patients: a Restrospective Study on the Sagittal Cephalometric Variables
1Maxillofacial Surgery Unit, Sant’Anna Hospital Como, Italy.
2Department of Orthodontics, School of Dentistry, University of Insubria, Varese, Italy.
Corresponding author:
Via Buia 34, 55100 Lucca
Italy
Phone: (0039) 3498486159
Fax: (0039) 0583496325
E-mail: valentinacinquini@yahoo.it
ABSTRACT
Objectives: The present retrospective study analyzes sagittal cephalometric changes in patients affected by obstructive sleep apnea syndrome submitted to maxillomandubular advancement.
Material and Methods: 15 adult sleep apnea syndrome (OSAS) patients diagnosed by polysomnography (PSG) and treated with maxillomandubular advancement (MMA) were included in this study. Pre- (T1) and postsurgical (T2) PSG studies assessing the apnea/hypopnea index (AHI) and the lowest oxygen saturation (LSAT) level were compared. Lateral cephalometric radiographs at T1 and T2 measuring sagittal cephalometric variables (SNA, SNB, and ANB) were analyzed, as were the amount of maxillary and mandibular advancement (Co-A and Co-Pog), the distance from the mandibular plane to the most anterior point of the hyoid bone (Mp-H), and the posterior airway space (PAS).
Results: Postoperatively, the overall mean AHI dropped from 58.7 ± 16 to 8.1 ± 7.8 events per hour (P < 0.001). The mean preoperative LSAT increased from 71% preoperatively to 90% after surgery (P < 0.001). All the patients in our study were successfully treated (AHI < 20 or reduced by 50%). Cephalometric analysis performed after surgery showed a statistically significant correlation between the mean SNA variation and the decrease in the AHI (P = 0.01). The overall mean SNA increase was 6°.
Conclusions: Our findings suggest that the improvement observed in the respiratory symptoms, namely the apnea/hypopnea episodes, is correlated with the SNA increase after surgery. This finding may help maxillofacial surgeons to establish selective criteria for the surgical approach to sleep apnea syndrome patients.
J Oral Maxillofac Res 2013 (Apr-Jun);4(2):e5
doi:10.5037/jomr.2013.4205
Accepted for publication: 29 June 2013
Keywords: sleep apnea syndromes; orthognathic surgery; mandibular advancement; cephalometry.
To cite this article: Maxillomandibular Advancement in Obstructive Sleep Apnea Syndrome Patients: a Restrospective Study on the Sagittal Cephalometric Variables. J Oral Maxillofac Res 2013;4(2):e5 URL: http://www.ejomr.org/JOMR/archives/2013/2/e5/v4n2e5ht.htm |
Received: 14 May 2013 | Accepted: 29 June 2013 | Published: 1 July 2013
Copyright: © The Author(s). Published by JOMR under CC BY-NC-ND 3.0 licence, 2013.