Suzuki A, Takahama Y
Department of Orthodontics, Faculty of Dentistry, Kyushu University, Fukuoka, Japan.
Cleft Palate Craniofac J. 1992 Jul;29(4):376-9. doi: 10.1597/1545-1569_1992_029_0376_mliosw_2.3.co_2.
As a pilot study, dental casts of 30 patients with unilateral cleft lip and palate were selected and examined from the longitudinal data in the Department of Orthodontics, Kyushu University Dental Hospital. Dental casts of the anterior teeth were sectioned at right angles to the long axis of the tooth 2 to 3 mm below the incisal edge. The teeth were differentiated according to their cross sections. They were classed as lateral incisors or other types by the ratio of labiolingual diameter to mesiodistal diameter and the flatness labiolingually. Dental casts of 309 additional patients with cleft alveolus were examined subjectively based on above findings. In primary dentition, 183 of 184 teeth on the cleft side were incisal type. One tooth was canine type. In permanent dentition, 42 of 78 teeth on the cleft side were conical type, 20 teeth were intermediate type, and 16 teeth were incisal type. As a conclusion, the tooth on the cleft side is almost certain to be a lateral incisor, not a supernumerary canine tooth. As well, their form was normal in the majority of the primary dentition, but malformed in the permanent one.
作为一项试点研究，从九州大学牙科医院正畸科的纵向数据中选取并检查了30名单侧唇腭裂患者的牙模。前牙牙模在切缘下方2至3毫米处与牙齿长轴成直角进行切片。根据牙齿的横截面进行区分。根据唇舌径与近远中径的比例以及唇舌向的扁平度，将它们分类为侧切牙或其他类型。基于上述发现，对另外309名牙槽嵴裂患者的牙模进行了主观检查。在乳牙列中，裂侧184颗牙齿中有183颗为切牙型。1颗为尖牙型。在恒牙列中，裂侧78颗牙齿中有42颗为锥形，20颗为中间型，16颗为切牙型。结论是，裂侧的牙齿几乎肯定是侧切牙，而不是多生尖牙。此外，它们的形态在大多数乳牙列中是正常的，但在恒牙列中是畸形的。
