Yoo E, Murakami S, Takada K, Fuchihata H, Sakuda M
Department of Orthodontics, Faculty of Dentistry, Osaka University, Japan.
J Dent Res. 1996 Dec;75(12):1957-62. doi: 10.1177/00220345960750120701.
It has often been hypothesized that a large tongue leads to an enlargement of the mandible and therefore contributes to the development of mandibular prognathism. We examined (1) whether the tongue volume in human subjects with mandibular prognathism was larger than that in subjects with good occlusion and (2) whether the tongue volume and the pharyngeal capacity correlated with the morphological characteristics of dento-skeletal structures. Magnetic resonance images of the tongue and its surrounding structures were recorded for female adult volunteers with good occlusion (control group, n = 10) and patients with mandibular prognathism (test group, n = 16). Lateral cephalograms were obtained for the patients. No significant differences were determined for the tongue volume or the pharyngeal capacity between the two groups. The tongue volume did not correlate with the pharyngeal capacity (r = 0.280, p = 0.166). The tongue volume correlated with the facial angle (r = 0.548, p = 0.028), the Y-axis (r = 0.539, p = 0.031), and the angle nasion-A point-pogonion (r = 0.540, p = 0.031). These results suggest that the tongue volume is accounted for by the combined horizontal and vertical location of the chin and symphysis, but do not support the conventional clinical surmise that large tongue volume is inherent in patients with mandibular prognathism.
人们常常假设，大舌头会导致下颌骨增大，从而促使下颌前突的发展。我们研究了：（1）下颌前突患者的舌体积是否大于咬合良好者；（2）舌体积和咽容量是否与牙-骨骼结构的形态特征相关。对咬合良好的成年女性志愿者（对照组，n = 10）和下颌前突患者（试验组，n = 16）记录了舌头及其周围结构的磁共振图像。为患者获取了头颅侧位片。两组之间在舌体积或咽容量方面未确定有显著差异。舌体积与咽容量不相关（r = 0.280，p = 0.166）。舌体积与面角（r = 0.548，p = 0.028）、Y轴（r = 0.5,39，p = 0.031）以及鼻根点-A点-颏前点角（r = 0.540，p = 0.031）相关。这些结果表明，舌体积由下巴和正中联合的水平和垂直位置共同决定，但不支持传统临床推测，即大舌体积是下颌前突患者所固有的。
