Bencao Gangmu Reference Library
鹊肾树 / 砂纸树 / 暹罗牙刷树 / 刺桑 / 见血封喉同科 / 粗叶木 — Streblus asper Lour. (syn. Trophis aspera)
Pinyin: Quèshènshù / Shāzhǐshù / Xiānluó Yáshuāshù · Malay: Kesinai / Pokok Kesinai / Kayu Gigi / Khoi · Family: Moraceae (桑科)
Energetics
Cool to Cold (微寒 / 苦寒)
Flavor
Bitter, astringent, slightly sweet (苦、涩、微甘、凉)
Meridians
Stomach (胃), Liver (肝), Large Intestine (大肠), Kidney (肾)
Traditional Edict
Sandpaper Tree / Toothbrush Tree (Kesinai / Que Shen Shu / Khoi). Abrasive scabrid leaves and fibrous twigs. Supreme natural toothbrush of Buddhist antiquity (Kayu Gigi): chewing twig bristles destroys dental plaque (S. mutans), stanches gingival bleeding, cures filariasis.
Cautions & Contraindications
- Spit out saliva during chew-stick use (avoid swallowing concentrated cardenolides). Do not ingest high-dose bark decoctions in cardiac glycoside therapy (Digoxin interaction).
Clinical Applications
- Chronic marginal gingivitis, periodontal pocket bleeding and dental calculus prophylaxis, lymphatic filariasis (macrofilaricidal destruction of Brugia malayi microfilariae), and infectious dysentery.
Quality Markers
Mechanism & Phytochemistry
1. Volatile terpenoids and strebloside inhibit glucosyltransferase in Streptococcus mutans, preventing plaque biofilm formation. 2. Bark tannins cross-link bleeding gingiva. 3. Filariasis lysis.
Preparation & Dosage
THE ANCIENT KHOI CHEW-STICK PROTOCOL (Siamese Herbal Toothbrush): Take a 15 cm green pencil-sized Kesinai twig (*Kayu Gigi*); chew 1 cm of the tip until fibers fray into a soft brush; brush teeth for 3 min (spit saliva). Mouthwash: 15 g dried bark boiled in 300 mL water.
Appended Prescriptions
- 1. The Sovereign Periodontal Health & Gingivitis Mouthwash with Syzygium aromaticum (Clove oil) and Sea Salt. 2. Filariasis Lymphatic Clearance Draught with Baringtonia.
Yemama Apothecary · Petaling Jaya, Malaysia · For educational and clinical reference only
