Roth P, Hirschfelder U
Friedrich-Alexander-Universität Erlangen-Nurnberg.
Dtsch Zahnarztl Z. 1990 May;45(5):267-9.
Orthopantomographic films and anamnestic data of 1553 orthodontic patients presenting four third molars were evaluated for tooth agenesis. Agenesis was found in 94 patients (6.1%). There were no significant differences between male and female patients. The most commonly missing teeth were the lower second premolars followed by the upper lateral incisors and the upper second premolars in decreasing order of frequency. Compared with the data in the literature, these results suggest that agenesis occurs less frequently in patients with anlage of all four third molars.
对1553例有四颗第三磨牙的正畸患者的曲面断层片和既往史数据进行了牙齿发育不全评估。发现94例患者（6.1%）存在发育不全。男性和女性患者之间无显著差异。最常缺失的牙齿是下颌第二前磨牙，其次是上颌侧切牙和上颌第二前磨牙，频率依次降低。与文献中的数据相比，这些结果表明，在有四颗第三磨牙牙胚的患者中，发育不全的发生率较低。
