Hai Collection, Lower Volume Radical: Tooth (chǐ) Character: zhen Kangxi stroke count: 25 Page 1535, Entry 33 Pronounced dian Expanded Rhymes (Guangyun): Tooth. Collection of Rhymes (Jiyun): Tooth. Comprehensive Chapters (Yupian): The molars. Vocabulary (Zihui): The end of the teeth. Correct Interpretation of Characters (Zhengzitong): When men are twenty-four years old and women are twenty-one years old, the wisdom teeth grow. Also, the firmness of teeth. Book of Etiquette and Ceremonial (Yili): Right wisdom teeth, left wisdom teeth. Commentary (Shu): Explains that the wisdom teeth are the longest teeth on both sides of the jaw.