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首页> 外文期刊>The Journal of Prosthetic Dentistry >Inner canthal distance and geometric progression as a predictor of maxillary central incisor width.
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Inner canthal distance and geometric progression as a predictor of maxillary central incisor width.

机译：内can距离和几何进展是上颌中切牙宽度的预测指标。

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Statement of Problem. Estimating the mesiodistal width of maxillary central incisors may be difficult when artificial teeth are selected for edentulous subjects. Purpose. This study examined the relationship between inner canthal distance and maxillary central incisor mesiodistal width in terms of the geometric progression popularly known as the golden proportion. Material and Methods. Two hundred twenty-nine dentate Saudi subjects (120 males, 109 females; mean age 21.46 years) free from facial and dental deformities were examined. The mesiodistal width of each maxillary central incisor was measured between its interproximal contact points. The inner canthal distance was measured from medial angle to medial angle of the palpebral fissures of the eyes. The common ratios of geometric progression are 0.618 and 1.618. The inner canthal distance of each subject was multiplied by a decreasing function value of the geometric progression term (0.618) to provide the combined width of 2 central incisors. The product was then divided by 2 to obtain the width of a single maxillary central incisor. A t test was used to identify any significant differences in mesiodistal tooth width and inner canthal distance by gender. Agreement between the measured and calculated central incisor widths was evaluated with Pearson's correlation coefficients, as was intraexaminer reliability. Significance was set at alpha=.05. Results. The mean inner canthal distance of male and female subjects was 28.7 +/- 1.7 mm and 27.9 +/- 2.1 mm, respectively. The mean maxillary central incisor width of male and female subjects was 8.87 +/- 0.5 mm and 8.68 mm +/- 0.4 mm, respectively. Differences between the mean values for both measurements were significant (P =.002). The actual and calculated widths of the natural maxillary central incisors were found to be highly correlated (r =.943). Conclusion. Within the population tested, a significantly higher mean inner canthal distance and maxillary central incisor width were recorded for male subjects. Inner canthal distance, when multiplied by a decreasing function value of the geometric progression term and then divided by 2, was a reliable predictor of maxillary central incisor width.
机译：问题陈述。当为无牙颌受试者选择人造牙齿时，估计上颌中切牙的近中颌宽度可能很困难。目的。这项研究以几何级数的方式检查了内can距离与上颌中切牙近中隔宽度之间的关系，这种关系通常被称为黄金比例。材料与方法。检查了229名无面部畸形和牙齿畸形的沙特齿状受试者（男120例，女109例;平均年龄21.46岁）。测量每个上颌中切牙的近牙间接触点之间的近中膜宽度。从眼睛的睑裂的内侧角到内侧角测量内angle距离。几何级数的常见比率为0.618和1.618。将每个受试者的内牙根距离乘以几何级数项的递减函数值（0.618），以提供2个中央门牙的组合宽度。然后将乘积除以2，以获得单个上颌中切牙的宽度。 t检验用于确定性别对中后牙宽度和内can距离的任何显着差异。用皮尔逊相关系数评估测得的和计算出的中央门牙宽度之间的一致性，以及检查者内部的可靠性。重要性设置为alpha = .05。结果。男性和女性受试者的平均内can距离分别为28.7 +/- 1.7 mm和27.9 +/- 2.1 mm。男性和女性受试者的平均上颌中切牙宽度分别为8.87 +/- 0.5 mm和8.68 mm +/- 0.4 mm。两次测量的平均值之间的差异是显着的（P = .002）。发现天然上颌中切牙的实际宽度和计算宽度高度相关（r = .943）。结论。在测试的人群中，男性受试者的平均内can距离和上颌中切牙宽度明显更高。内can距离与几何渐进项的递减函数值相乘，然后除以2，是上颌中切牙宽度的可靠预测指标。

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