Rak D, Muretić Z
Acta Stomatol Croat. 1990;24(2):111-21.
The aims of the study were: --to determine sagittal differences in the position and inclination of incisors in defined orthodontic anomalies as compared to eugnathic occlusion; --to assess the importance of variable interrelationships for the evaluation of incisor orientation; and --to describe the distribution of compatibility of all linear and angular assessments of incisor orientation studied in relation to both jaws, direction of deviation and type of malocclusion. A sample of 436 roentgenograms taken in subjects of both sexes aged 10-18 years (180 with eugnathic occlusion and 256 with orthodontic anomalies) were analyzed. Five dentoalveolar variables were observed. Use of the 3 degrees = 1 mm principle allowed the inclination and position of incisors to be compared. The following conclusions were reached: --as compared to eugnathic subjects, dentoalveolar variables were changed in defined orthodontic malocclusions with clear differentiation according to type of anomaly; --a significant relationship was found for most variables used to assess the position and inclination of incisors; --a complete compatibility between the position and inclination was recorded in 16.7% and 15.7% of cases in the maxilla and mandible, respectively; --compatibility between the inclination and position was highest in subjects with eugnathic occlusion; and --inclination and position of incisors may be mutually independent or even contradirectional in one and the same subject, necessitating separate analytical evaluation.
——确定特定正畸异常情况下切牙位置和倾斜度与正常咬合相比的矢状面差异；——评估可变相互关系对切牙方向评估的重要性；——描述所研究的与上下颌、偏差方向和错牙合类型相关的切牙方向所有线性和角度评估的兼容性分布。分析了436张10至18岁男女受试者的X线片样本（180例正常咬合，256例正畸异常）。观察了五个牙槽变量。采用3度 = 1毫米原则可比较切牙的倾斜度和位置。得出以下结论：——与正常咬合受试者相比，特定正畸错牙合中牙槽变量发生变化，并根据异常类型有明显差异；——在用于评估切牙位置和倾斜度的大多数变量中发现了显著关系；——在上颌和下颌病例中，分别有16.7%和15.7%的病例记录到位置和倾斜度完全兼容；——正常咬合受试者中倾斜度和位置的兼容性最高；——在同一受试者中，切牙的倾斜度和位置可能相互独立甚至相反，需要单独进行分析评估。
