齿者，骨之所终，而髓之所养也，小儿禀受肾气不足，不能上营而髓虚，不能
充于骨，又安能及齿，故齿久不生也，地黄丸主之。一小儿三岁，言步未能，齿
发尤少，体瘦艰立，发热作渴，服肥儿丸不应。余曰此肾虚疳证也，盖肥儿丸脾胃
经之药，久服则肾益虚，其疳益甚。不信，牙发渐落。令用地黄丸加鹿茸、五味子，
半载而元气壮健。一小儿体瘦腿细，行步艰辛，齿不坚固，发稀短少。用六味地
黄丸、补中益气汤年余，诸证悉愈，形体壮实。
〔张涣〕香附丹 治齿不生。
大香附子（拣净，刮去皮） 沉香（各一两） 雄鼠粪（烧灰） 干蟾（烧灰） 槟榔（各半两）
上件捣，罗为细末，用羊髓四两煮烂和成膏，如黍米大。每服十粒，麝香汤下，量儿大小加减。
〔汤氏〕芎黄散 治小儿齿不生。
大川芎 生地黄（各半两） 山药 当归 甘草（炙。各一分）
上焙，为末，热汤调服。或时以药末擦齿龈。
《千金翼方》 溺坑中竹木，主小儿齿不生，正旦刮涂之，即生。
《外台·短剧》又方 取雌鼠屎三七枚，以一枚拭齿根处，尽此止，二十一日齿当生。
雌鼠屎，头尖是也。《千金》同。《杨氏产乳方》用三十枚，仍云雌粪，用两头丸者是。
《圣惠》治小儿齿不生，或因落不生方
上取牛粪中黑豆二七枚，小开去头上皮，以此豆头开处，注齿根上，时时用之，
当效也。
Teeth are the culmination of bones and are nourished by marrow. Children with insufficient congenital Kidney Qi cannot ascend to nourish, resulting in an emptiness of the Marrow Sea (brain/marrow reservoir), which fails to fill the bones; how can it then nourish the teeth? Therefore, delayed tooth eruption occurs, and Dihuang Wan (Rehmannia Pill) is the primary prescription for treatment. A three-year-old child could not yet speak or walk, had particularly sparse hair and teeth, was emaciated, found standing difficult, and presented with fever and thirst. Administration of Fei'er Wan (Flesh-Enriching Pill) yielded no effect. I stated this was a deficiency-type Gan syndrome (malnutrition syndrome) due to Kidney deficiency. This is because Fei'er Wan is a medication for the Spleen and Stomach meridians; prolonged use exacerbates Kidney deficiency and worsens the Gan condition. The parents did not believe this, and the child's teeth and hair gradually fell out. Subsequently, Dihuang Wan augmented with Lurong (Deer Antler) and Wuweizi (Schisandra Berry) was used, and after half a year, the Yuanqi (Original Qi) became robust. Another child was emaciated, had thin legs, found walking difficult, had insecure teeth, and sparse, short hair. Treatment with Liuwei Dihuang Wan (Six-Ingredient Rehmannia Pill) and Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction) for over a year resulted in the complete resolution of all symptoms and a robust physique.
[Zhang Huan] Xiangfu Dan (Cyperi Bulbus Pill) treats delayed tooth eruption.
Da Xiangfu Zi (Cyperi Rhizoma, selected clean, skin scraped off) Chenxiang (Aquilariae Lignum Resinatum, each 1 liang) Xiong Shufen (Male Rat Feces, burnt to ash) Ganchan (Dry Bufo, burnt to ash) Binglang (Arecae Semen, each 0.5 liang).
The above ingredients are pounded, sifted into fine powder, and mixed with 4 liang of Sheep Medulla (Ovis Fel Uterus/Marrow) boiled until soft to form a paste, sized like millet grains. Take 10 pills per dose, administered with Shexiang Tang (Musk Decoction), adjusting dosage according to the child's size.
[Tang Shi] Xionghuang San (Ligustici Chuanxiong and Rehmanniae Radix Powder) treats delayed tooth eruption in children.
Da Chuanxiong (Ligustici Chuanxiong Rhizoma) Sheng Dihuang (Rehmanniae Radix Recens, each 0.5 liang) Shanyao (Dioscoreae Rhizoma) Danggui (Angelicae Sinensis Radix) Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried, each 1 fen).
The above are baked, ground into powder, and taken with hot water. Alternatively, the powder may be applied to the gums.
*Qianjin Yi Fang* (Supplement to the Essential Prescriptions Worth a Thousand Gold): Bamboo or wood from urine pits treats delayed tooth eruption in children. Scrape and apply on the first day of the New Year, and teeth will grow.
*Waitai Jianyue* (External Cabinet Brief Prescriptions) Another method: Take 21 pieces of female rat feces. Use one piece to wipe the tooth root area until exhausted. After twenty-one days, teeth should emerge. Female rat feces have pointed heads. *Qianjin* agrees. *Yang Shi Chanru Fang* uses 30 pieces, specifying female feces, using those that are round at both ends.
*Shenghui Fang* (Prescriptions of the Holy Grace) treating delayed tooth eruption in children, or failure to grow after loss:
Take fourteen black beans from cow dung. Carefully remove the skin from the head of each bean. Apply the opened end of these beans to the tooth roots, using frequently, and efficacy is expected.