Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to protect your teeth from disease [title] Take care of your teeth and gums. [step] This is the first requirement. One cannot always rely upon the dentist so he must take necessary steps at home to prevent any dental problems.

Ending1: Healthy and strong teeth add charm and beauty to one's smile, so it is important to keep them healthy and protect them from any diseases. [substeps] Tooth decay is the major problem caused due to cavities. Ending2: Dental cleansers are formulated to clean teeth or gums without whitening them. Wear the appropriate 3 inch (7.6 cm) toothbrush on out of habit. Ending3: Here are some places to check out : [substeps] Brush your teeth before and after eating, and between meals to avoid tartar buildup on the back of your teeth. Brush your tongue and gums every day. Ending4: Sign up for braces and brush regularly. See your dentist monthly to ensure that your gums are healthy.

Answer format: ending1/ending2/ending3/ending4