病源齿 者，是虫蚀齿至断，脓烂汁臭如蚀之状，故谓之 齿。（出第二十九卷中）
广济疗 齿。石黛散方。
五月五日干虾蟆烧灰，石黛甘皮各等分，捣末，以敷齿上取瘥。
又疗 齿，及口疳虫食。紫蓝灰方。
取紫蓝烧作灰以涂敷之，日三五度，取瘥为度。
又疗 齿并虫，积年不瘥，从少至老方。
雀麦一名牡姓草，似牛尾草一味，苦瓠叶三十枚，净洗，露一宿，平旦取草屈，长二寸
，广
极热
者黄
必效近贵胜共敷 齿方。
细辛 当归 甘草（炙） 蛇床子（各一两） 青葙子（三两）
上五味捣，以绵裹如大豆着齿上，日三，勿咽汁，瘥止。（肘后同）
又 齿方。（韦给事处得之）
每见月拜咒云∶月阿姑， 齿虫枯，月阿姨， 齿虫死，以差即止。
张文仲疗头面风，口齿痛不可忍方。
椒（一合） 莽草（十叶熬） 白术 崔李根（郁李根也） 独活 芎 （各二两） 细
辛防
风（各一两）
上八味切，以酒三升煮三五沸，去滓含之，以瘥为度。勿咽汁。（千金无白术）
救急疗齿风动痛方。
苍耳一握，以浆煮，着盐含之。
古今录验疗齿中风疼痛龋肿。芎 汤方。
细辛（一两） 芎 （二两） 附子（一两炮）
上三味切，以水六升，煮取二升，去滓含之少许，冷即吐却，日三四度。勿咽汁。
In the *Bingyuan* (Source of Diseases), "quchi" (dental caries) refers to teeth being eaten by worms until they break, with pus rotting and juice smelling foul, resembling a corroded state; hence it is called quchi. (From Volume 29)
*Guangji Fang* treats dental caries. Shidai San (Mineral Indigo Powder) formula:
Burn dried toads collected on the fifth day of the fifth lunar month into ash. Mix with equal parts of Shidai (Mineral Indigo) and Ganpi (Sweet Bark). Pound into powder and apply to the affected teeth until healed.
Another prescription for treating dental caries and oral canker sores caused by worm erosion. Zilan Hui (Purple Isatis Ash) formula:
Burn Zilan (Purple Isatis leaves) into ash and apply to the area. Apply three to five times daily until healed.
Another prescription for treating dental caries accompanied by worm erosion that has persisted for years without healing, from youth to old age:
Quemai (Bromus japonicus), also known as Muxingcao, resembles Niuweicao (Setaria viridis). Use thirty leaves of Kuhu (Bitter Bottle Gourd). Wash them cleanly and leave them exposed overnight. At dawn, take the grass stems, break them... [Text fragment missing/unclear] ... extremely hot ones turn yellow... Bixiao Jin Gui Sheng Gongfu Quchi Fang (Effective Formula for Nobles):
Xixin (Asari Radix et Rhizoma), Danggui (Angelicae Sinensis Radix), Gancao (Licorice Root, honey-fried), Shechuangzi (Cnidii Fructus) each one liang; Qingxiangzi (Phytolaccae Semen) three liang.
Pound the above five herbs. Wrap in cotton like a soybean size and place against the tooth. Do this three times daily. Do not swallow the juice. Stop when healed. (Same as *Zhouhou Beiji Fang*)
Another formula for quchi. (Obtained from Official Wei):
Every time you see the moon, bow and chant the spell: "Moon Auntie, let the caries worm wither; Moon Auntie, let the caries worm die." Stop when cured.
Zhang Wenzhong's formula for treating wind in the head and face, causing unbearable toothache:
Jiaojiao (Zanthoxyli Pericarpium) one he; Mangcao (Isatidis Folium, ten leaves, fried); Baizhu (Atractylodis Macrocephalae Rhizoma); Cuili Gen (Trichosanthes Radix, also known as Yuli Gen/Dorian Plum Root); Duhuo (Angelicae Pubescentis Radix); Xiongqiong (Ligustici Chuanxiong Rhizoma) each two liang; Xixin (Asari Radix et Rhizoma); Fangfeng (Saposhnikoviae Radix) each one liang.
Chop the above eight herbs. Boil in three sheng of wine for three to five boils. Remove the dregs and swish in the mouth. Stop when healed. Do not swallow the juice. (*Qianjin Fang* does not contain Baizhu).
*Jiuji Fang* (Emergency Rescue Formulas) treats tooth wind-induced pain:
Take a handful of Cang'er (Xanthii Fructus), boil in Jiangshui (fermented grain liquid), add salt, and swish.
*Gujin Luyan* treats tooth wind-induced pain, swelling, and dental caries. Xiongxiong Tang (Ligusticum Decoction) formula:
Xixin (Asari Radix et Rhizoma) one liang; Xiongxiong (Ligustici Chuanxiong Rhizoma) two liang; Fuzi (Aconiti Lateralis Radix Praeparata, processed) one liang.
Chop the above three herbs. Boil in six sheng of water until reduced to two sheng. Remove the dregs. Swish a small amount in the mouth. Spit out when cold. Do this three to four times daily. Do not swallow the juice.