Ulm M R, Kratochwil A, Ulm B, Solar P, Aro G, Bernaschek G
Department of Prenatal Diagnosis and Therapy, University of Vienna, Austria.
Ultrasound Obstet Gynecol. 1998 Oct;12(4):240-3. doi: 10.1046/j.1469-0705.1998.12040240.x.
A total of 126 genetic syndromes are associated with oligodontia or anodontia. The most frequent of these are ectodermal dysplasias, all types of facial cleft and Down's syndrome. With the advent of three-dimensional ultrasonography, accurate assessment of many fetal abnormalities has become possible. The objective of this study was to determine the effectiveness of three-dimensional ultrasonography in the visualization of fetal tooth germs.
We examined 45 women with singleton pregnancies between 16 and 36 gestational weeks who were undergoing routine ultrasound check-ups for fetal tooth germs with conventional two-dimensional ultrasonography, followed by three-dimensional ultrasonography using multiplanar reconstruction.
In the 45 fetuses studied, fetal tooth germs were visualized at the first attempt in 36 cases (80%). In the group of fetuses aged between 19 and 36 weeks of gestation, the overall detection rate in both jaws was at least 86% for three-dimensional ultrasonography, compared to at least 56% for two-dimensional ultrasonography.
Three-dimensional ultrasonography was clearly superior to conventional ultrasonography in the visualization and evaluation of fetal tooth germs. Three-dimensional ultrasonography therefore has a potential for enhanced visualization of fetal tooth germs and may aid in the antenatal detection of syndromes associated with oligodontia or anodontia.
共有126种遗传综合征与少牙症或无牙症相关。其中最常见的是外胚层发育不良、各种类型的面部裂隙和唐氏综合征。随着三维超声检查的出现，对许多胎儿异常情况进行准确评估已成为可能。本研究的目的是确定三维超声检查在观察胎儿牙胚方面的有效性。
我们检查了45名单胎妊娠的女性，她们在妊娠16至36周期间接受常规超声检查以寻找胎儿牙胚，先用传统二维超声检查，然后使用多平面重建进行三维超声检查。
在研究的45例胎儿中，首次尝试时在36例（80%）中观察到了胎儿牙胚。在妊娠19至36周的胎儿组中，三维超声检查在上下颌的总体检出率至少为86%，而二维超声检查至少为56%。
在观察和评估胎儿牙胚方面，三维超声检查明显优于传统超声检查。因此，三维超声检查在增强胎儿牙胚可视化方面具有潜力，可能有助于产前检测与少牙症或无牙症相关的综合征。
