Wichmann M
Zentrum für Zahn-, Mund- und Kieferheilkunde der Medinischen Hochschule Hannover.
ZWR. 1990 Aug;99(8):623-6.
Anterior and posterior tooth visibility was analysed in a population of 220 subjects. Scoring photographic data gave the percentages of anterior and posterior teeth shown in different situations: speaking, laughing, exaggerated smiling. The consequences for planning and manufacturing dentures are shown by examples.
对220名受试者的前后牙可见性进行了分析。通过对照片数据评分得出不同情况下（说话、大笑、夸张微笑）前牙和后牙的显示百分比。通过实例展示了对假牙设计和制作的影响。
