Craniofacial Dimensions in Beagles with Congenital Mandibular Prognathism

本研究的目的是研究7只6个月大的AGU（爱知学院大学）小猎犬的上颌骨畸形。对头颅造影和牙模进行了量纲分析。分析使用了26个脑电图参考点和81个铸型参考点。该研究揭示了以下几点：下颌骨呈侧移（左移4只，右移3只）。向左移动的量比向右移动的量大3。这种下颌移位不仅局限于牙弓，而且下颌本身也畸形了。这种畸形不仅局限于下颌骨，上颌也受到影响。在一只动物中，两牙弓共有五颗牙齿先天缺失，而在另一只动物中，两颗牙齿先天缺失，但只在下牙弓。建立了正常和先天性前凸的agu -株比格犬在6个月大时的头部测量数据。

The purpose of the present study was to investigate malformation of the maxillae in seven congenitally prognathic AGU (Aichi-Gakuin University) six month old beagles. Dimensional analysis was done on cephalograms and dental casts. Analysis used 26 reference points on cephalograms and 81 points on casts.The study revealed the following :1. the mandible showed lateral shifting (four animals showed left shifting and three showed right)2. the amount of shifting to the left was larger than that to the right3. this mandibular shifting was not limited to the dental arch but the mandible itself also was malformed4. this malformation was not limited to the mandible but the maxillae were also affected5. in one animal, a total of five teeth were congenitally missing in both arches, and in another animal, two teeth were congenitally missing but only in the lower arch. Cephalometric dimensional data were established for normal and congenitally prognathic AGU-strain beagle dogs at six months of age.