Electric toothbrushes are becoming increasingly popular for their superior cleaning power and convenience. However, proper usage is important to ensure optimal oral health benefits. Here are some usage instructions in English, along with annotations and tips to help you make the most of your electric toothbrush.

1. Choose the right brush head: It is important to select a brush head that fits your mouth comfortably and effectively reaches all areas of your teeth and gums. Look for brush heads with soft bristles to prevent damage to your enamel and gums.

2. Apply toothpaste: Apply a pea-sized amount of toothpaste to the brush head. Avoid using too much toothpaste as it can lead to excessive foaming and make it harder to clean your teeth effectively.

3. Turn on the toothbrush: Press the power button to turn on the toothbrush. Start with the lowest setting and gradually increase the intensity as you get used to the sensation.

4. Brushing technique: Hold the brush at a 45-degree angle to your teeth and gums. Use gentle, circular motions to clean each tooth thoroughly. Avoid scrubbing too hard, as this can damage your enamel and gums.

5. Timing: Brush for a full two minutes to ensure thorough cleaning. Some electric toothbrushes have built-in timers to help you track your brushing time.

6. Rinse: After brushing, rinse your mouth and the brush head thoroughly to remove any remaining toothpaste and debris.

7. Replace brush head: Replace the brush head every three to four months, or sooner if the bristles show signs of wear. A worn brush head will not clean your teeth effectively.

8. Charging: Keep your electric toothbrush charged to ensure optimal performance. Follow the manufacturer's instructions for charging and storing your toothbrush.

By following these usage instructions and tips, you can maximize the benefits of your electric toothbrush and maintain a healthy smile. Remember to visit your dentist regularly for professional cleanings and check-ups to keep your oral health in top condition.