In phonetics, a sibilant is used to represent a specific sound.

If you don't get regular dental check-ups, you may develop periodontitis.

If you don't have regular dental check-ups, you may develop periodontitis.

The saber-toothed tiger is a type of extinct mammal.

We should always remember the power of Kannon in difficult times.

She is wearing braces.

He is doing special exercises to strengthen the incisivus labii superioris muscle.

She started a special exercise to strengthen the incisivus labii inferioris muscle.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.