- 期刊
三種牙齒尺寸預測法在臺灣兒童之分析與應用
Comparison of Three Different Tooth-size Prediction Methods for Taiwanese Children
摘要
藉由下顎恆門牙之尺寸來預測尚未萌發的恆犬齒及小臼齒的大小是早期混合齒列時，訂定矯正治療計畫的重要依據之一，常被使用的預測方法有莫義爾氏預測法、田中與詹森氏預測法、希歐氏預測法。本實驗將分別以這三種預測方法於臺大醫院兒童牙科過去十年所留存之病人齒模上加以測試，並比較預估的牙齒大小與實際上的牙齒大小之差距為何。本研究的結果顯示臺灣男性及女性之牙齒大小有性別之差異，且以上三種預測法應用在不同性別時有不同之準確度。結論：1）使用牙齒尺寸預測法時建議依照性別而修飾使用方法。2）使用莫義爾氏預測法時，男性上顎區適合使用85%之數值，下顎區適合使用75%之數值；女性上顎區使用75%之數值，下顎區則較適合使用50%之數值。3）使用田中與詹森氏預測法作預測時，不論男女，上顎區修飾為Σ12┬12÷2 +11.5後，能較貼近實際結果，下顎區則維持原本之方法即可。4）希歐氏預測法較不適合直接使用於臺灣族群之牙齒尺寸預估。
並列摘要
Tooth-size prediction of unerupted permanent canine and premolars is important for making an orthodontic treatment plan in early mixed dentition. The most commonly used prediction methods were developed by Moyers, Tanaka-Johnston, and Hixon-Oldfather, etc. This study exhibited the difference between the exact tooth-size and the predicted values by the above-mentioned methods in casts of the patients who received orthodontic examination in pediatric dental clinic of the National Taiwan University Hospital in recent 10 years. The result showed that there was a significant difference of tooth size between male and female subjects in Taiwan. Therefore, the predicted values by the 3 methods were different in both genders. When using Moyers' method for male subjects, 85% is suggested for the maxilla, and 75% for the mandible. In female subjects, 75% was recommended for the maxilla, and 50% for the mandible. For Tanaka-Johnston method, _Σ12┬12 ÷2 ＋11.5 showed closer to the reality for the maxilla, and no need to alter for the mandible. The Hixon-Oldfather prediction method is not suggested to be used for Taiwan children.