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Predictors of Obstructive Sleep Apnea-Hypopnea Treatment Outcome

¹ Department of Oral and Maxillofacial Surgery,
² Department of Clinical Neurophysiology, and
³ Department of Home Mechanical Ventilation, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands; and
⁴ Department of Pulmonary Diseases, Medical Center Leeuwarden, Leeuwarden, The Netherlands

View larger version (12K): [in this window] [in a new window]   Figure. Cephalometric analysis. (a) Reference points traced on lateral cephalograms. The following 19 reference points were identified on lateral cephalograms: A (point A; the deepest midline concavity on the anterior maxilla); ans (anterior nasal spine; the tip of the bony anterior nasal spine); B (point B; the deepest midline concavity on the mandibular symphysis); Ba (basion; the median point of the anterior margin of the foramen magnum); BT'(base of tongue intersection; intersection point of the line connecting B-Go with the base of tongue); Eb (epiglottis base; the point located at the intersection of the epiglottis and the base of tongue); Go (gonion; point on the bony contour of the gonial angle determined by bisecting the angle of the tangents to the body and ramus of the mandible, respectively); Hy (hyoid; the most anterior-superior point on the body of the hyoid bone); L1i (first lower incisor edge); L6c (first lower molar mesial cusp tip); Me (menton; the most inferior point on the mandibular symphysis); N (nasion; the most anterior point on the frontonasal suture); pns (posterior nasal spine; the tip of the bony posterior nasal spine); PPW' (posterior pharyngeal wall intersection; intersection point of the line connecting B-Go with the posterior pharyngeal wall); S (sella; the midpoint of the pituitary fossa); Sp (spina prim; intersection point of the line connecting ans-pns and the line connecting Me-N); Ut (uvular tip; tip of the velum of the soft palate); U1i (first upper incisor edge); and U6c (first upper molar mesial cusp tip). (b) Reference lines traced on lateral cephalograms. The following 5 reference lines were identified on lateral cephalograms: BT (base of tongue; the posterior outline of the tongue base extending from the base of the epiglottis to first maxillary molar); MP (mandibular plane; line connecting Me and Go); NL (nasal line; line connecting the ans and pns); OP (occlusal plane; line connecting the midpoint between U1i and L1i with the midpoint between U6c and L6c. The distance between the horizontal and vertical projections of U1i and L1i on the occlusal plane were used to calculate the overjet and overbite, respectively.); and PPW (posterior pharyngeal wall; the anterior outline of the posterior pharyngeal wall).

Journal of Dental Research, Vol. 86, No. 12, 1181-1186 (2007)
DOI: 10.1177/154405910708601208


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