Association of advanced hypodontia and craniofacial morphology in Japanese orthodontic patients.
Association of advanced hypodontia and craniofacial morphology in Japanese orthodontic patients.
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DOI：
10.1007/s10266-004-0034-5
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发表时间：
2004-09-01
期刊：
影响因子：
2.5
通讯作者：
Shimooka, Shohachi
中科院分区：
文献类型：
--
作者：
Endo, Toshiya;Yoshino, Sugako;Shimooka, Shohachi
这项研究的目的是检验晚期牙列缺失对日本患者头面部形态的影响。我们将先天缺牙定义为先天缺牙，不包括第三颗磨牙。检查了20例女性正畸患者的头颅侧位X线片，年龄8.5~19岁，平均13.9岁。从每张头影测量中获取28个角度和37个直线测量值，对这些头影测量数据进行统计分析，并与日本的头影测量标准进行比较。缺牙最多的是下颌第二前磨牙和上颌第二前磨牙，其次是上颌第一前磨牙和上颌第一磨牙。与日本标准相比，患者的颅底长度和角度较小，上颌骨长度较短，下颌略前突和向上旋转，上下切牙后倾。这些颅面畸形在治疗计划和机械治疗中应予以考虑。
The purpose of this study was to examine the effects of advanced hypodontia on craniofacial morphology in Japanese patients. We defined advanced hypodontia as a congenital absence of four or more permanent teeth, excluding the third molars. Lateral cephalometric radiographs of 20 female orthodontic patients (age range, 8.5 to 19 years; mean age, 13.9 years) were examined. Twenty-eight angular and 37 linear measurements were taken from each cephalogram, and these cephalometric data were statistically analyzed and compared with the Japanese cephalometric standards. The most frequently missing teeth were the mandibular and maxillary second premolars, followed by the maxillary first premolars and the maxillary first molars, in that order. Compared with the Japanese standards, a smaller cranial base length and angle, a shorter maxillary length, a slightly prognathic and upward-rotated mandible, and retroclination of the upper and lower incisors were found in the patients studied. These craniofacial anomalies should be taken into consideration in treatment planning and mechanotherapy.