The reasons for brushing teeth from the outside to inside and washing dishes from the inside to outside are primarily based on their respective purposes and the nature of the tasks involved.
Brushing teeth from the outside to inside:
Cleaning the visible surfaces: When we brush our teeth, we aim to clean the visible surfaces of the teeth where most of the plaque and food debris accumulate. Brushing from the outside (cheek side) to the inside (tongue side) allows us to reach these areas effectively.
Gum protection: Brushing from the outside to inside helps in gently massaging the gums, promoting better circulation and maintaining gum health. It's essential to clean the gum line properly to prevent gum disease and maintain good oral hygiene.
Preventing damage to tooth enamel: Brushing from the outside to inside follows the natural shape of the teeth and reduces the risk of damaging the enamel, which is the protective outer layer of the teeth.
Washing dishes from the inside to outside:
Efficient cleaning: When washing dishes, especially ones with food residues or stains on the inside, starting from the inside helps to loosen and remove the most stubborn dirt.
Minimizing splashing: Starting from the inside of the dish reduces the chances of splashing water and soap outside the dish, preventing unnecessary mess.
Conserving water and detergent: Focusing on the inside first ensures that you clean the essential part of the dish first, allowing you to use less water and detergent for effective cleaning.
In summary, brushing teeth from the outside to inside ensures thorough cleaning of visible surfaces, gum protection, and avoids enamel damage. Washing dishes from the inside to outside prioritizes efficient cleaning, minimizes splashing, and conserves water and detergent. The different approaches reflect the specific cleaning requirements and objectives of each task.