洗牙, or professional teeth cleaning, removes plaque, tartar, and stains that cannot be eliminated with regular brushing. The procedure improves oral hygiene, prevents cavities, and reduces the risk of gum disease. Dentists perform 洗牙 using ultrasonic tools and polishing techniques for a smooth, clean surface. Regular professional cleaning supports the longevity of fillings, crowns,... https://www.laresdental.com.hk/洗牙/