Take cloves and create a paste by combining it with coconut/olive oil. Use this paste to brush your teeth daily and you will be able to see the results in a few days.
Sage leaves are quite effective in dealing with stains on teeth. You can either rub sage leaves on your teeth directly or use sage powder with toothpaste. Make sure to use it regularly for the best results.
Basil is said to have certain properties that help whiten the teeth, this also helps maintain good oral hygiene.
Create a paste with turmeric and coconut oil and use it to brush your teeth daily. It contains several anti-inflammatory and antimicrobial properties that help deal with problems such as gingivitis and plaque.
Neem is popular for its anti-bacterial properties. It is best if you use neem sticks as a toothbrush, otherwise chewing on neem leaves or using toothpaste with neem properties is also effective.