Zhang Wei, Song Xiaomeng, Masumi Shin Ichi, Tanaka Tatsurou, Zhu Qingping
Research Institute of Stomatology, Department of Oral Special Consultation, Nanjing Medical University, Nanjing, China.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2011 Jun;111(6):778-84. doi: 10.1016/j.tripleo.2011.02.019.
The aim of this study was to evaluate the effect of altering changing head and body positions on the 2- and 3-dimensional (3D) configuration of the oropharynx with jaw protrusion.
Twelve healthy individuals (8 male, 4 female) with no history of sleep disturbances were invited to participate. For each subject, an acrylic splint was made with the mandible in protruded position. Subjects were imaged using magnetic resonance imaging in 4 different jaw, head, and body positions: 1) supine without protrusion; 2) supine with jaw protrusion; 3) supine with head rotation and jaw protrusion; and 4) laterally recumbent position with jaw protrusion. The 2- and 3D images of the upper airway in different positions were reconstructed by using a free DICOM reconstruction software. The dimension changes (anteroposterior and lateral dimensions, cross-sectional area, and volume) of the oropharynx (divided into retropalatal region and retroglossal region) were calculated and analyzed. Statistical analyses were performed using the Bartlett test and 1-way analysis of variance with α = .05.
Compared with nonprotruded position, dimensions of the oropharynx for both retropalatal region and retroglossal regions were found to be greater than with jaw protrusion. Head and body positions had little effect on configuration of the oropharynx with jaw protrusion in either 2- or 3D. The only change noted was a greater anteroposterior dimension of retropalatal region with head rotation and lateral supine position compared with the supine position.
Head and body positions have little effect on 2- and 3D airway dimensions on supine patients with jaw protrusion.
本研究旨在评估改变头部和身体位置对伴有下颌前突的口咽二维和三维（3D）结构的影响。
邀请了12名无睡眠障碍病史的健康个体（8名男性，4名女性）参与研究。为每个受试者制作了一个下颌处于前突位置的丙烯酸夹板。受试者在4种不同的颌、头和身体位置下使用磁共振成像进行成像：1）仰卧位无下颌前突；2）仰卧位伴下颌前突；3）仰卧位伴头部旋转和下颌前突；4）侧卧位伴下颌前突。使用免费的DICOM重建软件重建不同位置上气道的二维和三维图像。计算并分析口咽（分为软腭后区和舌后区）的尺寸变化（前后径和左右径、横截面积和体积）。采用Bartlett检验和α = .05的单因素方差分析进行统计分析。
与无下颌前突的位置相比，发现软腭后区和舌后区的口咽尺寸在有下颌前突时更大。头部和身体位置对伴有下颌前突的口咽二维或三维结构影响不大。唯一观察到的变化是，与仰卧位相比，头部旋转和侧卧位仰卧时软腭后区的前后径更大。
头部和身体位置对仰卧位伴有下颌前突患者的二维和三维气道尺寸影响不大。
