N M Roelfsema1, W C J Hop, J W Wladimiroff. 1. Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, The Netherlands. NMRoelfsema@hotmail.com
Abstract
OBJECTIVE: To explore the various ways of obtaining fetal maxillary and mandibular size with three-dimensional (3D) ultrasound, with a view to developing a tool for identifying minor anomalies in the lower facial region. METHODS: Serial 3D sonographic measurements of the fetal jaws were made in 126 normal singleton pregnancies at 18-34 weeks of gestation for determination of degree of maxillary and mandibular protrusion, maxillary and mandibular corpus lengths, mid- and lower facial depths and maxillary and mandibular curvature. In a sub study the reproducibility of the measurements was evaluated. RESULTS: The coefficient of variation in the reproducibility study varied between 7.1 and 10.5%. For all parameters except maxillary and mandibular protrusion, there was a significant gestational age-related increase. Ratios of maxillary/mandibular protrusion, maxillary/mandibular corpus lengths, mid-/lower facial depths and maxillary/mandibular curvature all showed a significant gestational age-related decrease, with the most distinct decrease in the mid-/lower facial depth ratio. CONCLUSIONS: 3D sonographic measurement of the fetal maxilla and mandible demonstrated an acceptable intraobserver variability for all measurements. The mid-/lower facial depth ratio appears to be most valuable in determining abnormal mandibular development. Copyright 2006 ISUOG. Published by John Wiley & Sons, Ltd.
OBJECTIVE: To explore the various ways of obtaining fetal maxillary and mandibular size with three-dimensional (3D) ultrasound, with a view to developing a tool for identifying minor anomalies in the lower facial region. METHODS: Serial 3D sonographic measurements of the fetal jaws were made in 126 normal singleton pregnancies at 18-34 weeks of gestation for determination of degree of maxillary and mandibular protrusion, maxillary and mandibular corpus lengths, mid- and lower facial depths and maxillary and mandibular curvature. In a sub study the reproducibility of the measurements was evaluated. RESULTS: The coefficient of variation in the reproducibility study varied between 7.1 and 10.5%. For all parameters except maxillary and mandibular protrusion, there was a significant gestational age-related increase. Ratios of maxillary/mandibular protrusion, maxillary/mandibular corpus lengths, mid-/lower facial depths and maxillary/mandibular curvature all showed a significant gestational age-related decrease, with the most distinct decrease in the mid-/lower facial depth ratio. CONCLUSIONS: 3D sonographic measurement of the fetal maxilla and mandible demonstrated an acceptable intraobserver variability for all measurements. The mid-/lower facial depth ratio appears to be most valuable in determining abnormal mandibular development. Copyright 2006 ISUOG. Published by John Wiley & Sons, Ltd.
Authors: Kelly N Evans; Kathleen C Sie; Richard A Hopper; Robin P Glass; Anne V Hing; Michael L Cunningham Journal: Pediatrics Date: 2011-04-04 Impact factor: 7.124
Authors: L Manganaro; A Tomei; F Fierro; M Di Maurizio; P Sollazzo; M E Sergi; V Vinci; S Bernardo; D Irimia; P Cascone; M Marini Journal: Radiol Med Date: 2011-04-19 Impact factor: 3.469