Dantadhavana: Classical Method and Dravyas

1. Understanding Dantadhavana: The Classical Method

Dantadhavana is a compound of two words: Danta (teeth) and Dhavana (cleansing or purifying). It is the first step in Mukha Shuddhi. The classical method is precise and based on principles of mechanics, pharmacology, and doshic balance.

Let's begin by watching a short video that provides an excellent overview of the classical method as described in the Ashtanga Hridaya.

As the video explained, the key components of the method are the tool, the timing, and the technique. Let's break them down.

The Tool: Danta Kashta (The Tooth-Twig)

Instead of a plastic brush, the classical tool is a fresh twig from a specific medicinal plant.

The selection and preparation of this twig are crucial:

• Dimensions: It should be approximately 12 angulas (about 9 inches) long and have a thickness comparable to the tip of one's own little finger. This standard is consistent across most major texts like Sushruta Samhita and Ashtanga Hridaya.
• Qualities: The twig must be fresh, straight, devoid of knots, and not infested or damaged.
• Preparation: The tip of the twig is chewed until its fibers separate and soften, forming a brush-like end. This process is key, as it also releases the medicinal juices of the plant directly into the oral cavity.

Timing (Kala) and Technique (Vidhi)

• Timing: Dantadhavana is recommended to be performed twice daily: once in the morning upon waking and again after meals.
• Technique: The brushing should be done gently, ensuring that every tooth is cleaned without injuring the gums (danta mamsa). Acharya Vagbhata specifies that the lower teeth should be cleaned first, followed by the upper teeth.

2. The Science of Dravyas: Selecting the Right Substance

The choice of substance (dravya) for Dantadhavana is the heart of its therapeutic effect. The selection is primarily based on the Rasa (taste) of the plant.

To understand the rationale and variety of dravyas, we'll consult a research paper that compiles information from the classical texts.

The Role of Rasa (Taste)

As you saw in the paper, the predominant tastes recommended for Dantadhavana are:

• Katu (Pungent): This taste cleanses the mouth (vaktra shodhana), liquefies and expels Kapha, stimulates senses, and enhances appetite (rochana).
• Tikta (Bitter): This is powerfully antimicrobial (krimighna), antitoxic (vishaghna), and has a scraping or cleansing (lekhana) action, making it ideal for removing plaque.
• Kashaya (Astringent): This taste has healing (ropana) and hemostatic (stambhana) properties. It helps to tighten gum tissue, reduce bleeding, and heal ulcers.

Why these three tastes? The oral cavity is a primary site of Bodhaka Kapha. In the morning and after meals, Kapha naturally tends to increase, leading to sluggishness, coating on the tongue, and plaque formation. The combination of Katu, Tikta, and Kashaya tastes directly counteracts this Kapha accumulation, cleansing the mouth and preventing oral diseases.

Recommended Dravyas for Danta Kashta (Twigs)

Based on their ideal taste profiles and therapeutic actions, the Samhitas recommend several plants. The paper LINK gave you a comparative list. Here are some of the most frequently cited examples, along with their key properties:

Here's a summary of key dravyas:

• Nimba (Neem - Azadirachta indica):
  • Rasa: Primarily Tikta (bitter).
  • Action: Excellent krimighna (antimicrobial), making it highly effective against bacteria that cause plaque and cavities.
• Khadira (Acacia catechu):
  • Rasa: Primarily Kashaya (astringent).
  • Action: Excellent for gum health. Its astringency helps tighten gums (danta dridhikara) and stop bleeding. It is considered dantya (specifically beneficial for teeth).
• Karanja (Pongamia pinnata):
  • Rasa: Katu, Tikta, Kashaya.
  • Action: Possesses a powerful combination of cleansing and antimicrobial properties, making it a versatile choice for overall oral health.
• Arka (Calotropis gigantea):
  • Rasa: Primarily Katu (pungent).
  • Action: Strong cleansing and Kapha-reducing properties.
• Nyagrodha (Banyan - Ficus benghalensis):
  • Rasa: Kashaya (astringent).
  • Action: Similar to Khadira, it is excellent for strengthening gums and healing oral tissues.

Alternative: Danta Churna (Tooth Powder)

While twigs are the primary tool, the texts also describe using powders or pastes. Acharya Sushruta provides a formula for a daily tooth powder, which includes:

• Kshoudra (Honey)
• Trikatu (Shunthi, Pippali, Maricha)
• Aromatic herbs like Twak (Cinnamon) and Ela (Cardamom)
• Saindhava Lavana (Rock Salt)
• Taila (Sesame oil)

This combination serves a similar purpose: the pungent and salty ingredients cleanse and are antimicrobial, the aromatics combat bad breath, and the honey/oil acts as a binding agent with its own healing properties.

Conclusion

In this lesson, we have systematically deconstructed the classical practice of Dantadhavana. You are now equipped to explain both the method and the rationale behind the substances used for this foundational oral hygiene practice.

Key Takeaways:

• The Method: Dantadhavana is performed twice daily using a fresh, 12-angula twig, with the end chewed into a soft brush, cleaning gently to protect the gums.
• The Dravyas: The choice of plant is critical and is based on its rasa (taste).
• The Rationale: Katu (pungent), Tikta (bitter), and Kashaya (astringent) tastes are preferred to counteract Kapha accumulation in the oral cavity, thereby cleansing, removing plaque, and strengthening gums.
• Key Plants: Nimba, Khadira, Karanja, and Arka are among the most important dravyas for Dantadhavana, each with specific therapeutic strengths.

This first step of cleansing the teeth sets the stage for the rest of the Mukha Shuddhi routine. Simply brushing is not enough if the dislodged impurities remain in the mouth.

In our next lesson, we will address this by exploring Jihva Nirlekhana (tongue scraping). We will learn its principles, benefits for removing ama, and how it completes the cleansing process initiated by Dantadhavana to enhance taste perception and digestive health.