It benefits in dental and oral care by inhibiting bacteria that cause tooth decay. Neem can also fight infectious mutans and dental caries. Clove and clove oil is known to have both analgesic and antibacterial properties, and like neem, it can be help in curbing a toothache caused by bacteria. Neem leaves can be chewed while clove oil should be applied. You can also gargle with neem oil for better results.