Both "Zähne putzen" and "Zähne bürsten" are commonly used in German to refer to the act of brushing teeth. "Zähne putzen" directly translates to "cleaning teeth," while "Zähne bürsten" translates to "brushing teeth." Both phrases are widely understood and used interchangeably in everyday language. **

Good oral hygiene involves maintaining a routine of daily practices to keep your mouth clean and healthy. This includes brushing your teeth at least twice a day with fluoride toothpaste, flossing daily to remove plaque and food particles between teeth, and using mouthwash to kill bacteria. Regular dental check-ups and cleanings are also important to prevent and detect any oral health issues early on. Additionally, avoiding tobacco products and maintaining a balanced diet can contribute to good oral hygiene. **

Private health insurance typically does not cover teeth whitening procedures, as they are considered to be cosmetic treatments rather than medically necessary. However, some dental insurance plans may offer coverage for teeth whitening as part of a broader dental care package. It's important to check with your insurance provider to understand what specific dental treatments are covered under your plan. **

Black spots in the oral cavity are areas of discoloration that can appear on the gums, tongue, cheeks, or roof of the mouth. These spots can be caused by a variety of factors, including poor oral hygiene, smoking, certain medications, or underlying health conditions. It is important to have any black spots in the oral cavity evaluated by a dentist to determine the cause and appropriate treatment. **

In the early days of photography, the exposure time for a photo could be quite long, sometimes up to several minutes. This made it difficult for people to hold a smile for that long without it looking forced or unnatural. Additionally, the cultural norms of the time also played a role, as smiling in photographs was not as common or expected as it is today. Furthermore, the formal and serious nature of early photography may have also contributed to the lack of smiles in old black and white photos. **

Based on the information provided, it is not possible to determine if the friend has poor oral hygiene. The fact that the friend has not visited a dentist in several years could indicate poor oral hygiene, but it could also be due to other reasons such as fear of the dentist, financial constraints, or simply not feeling the need to go. Without more information, it would be unfair to make assumptions about the friend's oral hygiene. **

You can improve your dog's oral hygiene by regularly brushing their teeth with a dog-specific toothbrush and toothpaste. Additionally, providing dental chews and toys designed to promote dental health can help reduce plaque and tartar buildup. It's also important to schedule regular dental check-ups with your veterinarian to monitor your dog's oral health and address any potential issues early on. Lastly, feeding your dog a balanced diet and avoiding excessive treats and table scraps can also contribute to better oral hygiene. **

iWhite teeth whitening works by using a combination of active whitening gel and blue light technology to remove stains and discoloration from the teeth. The whitening gel contains a high concentration of active whitening ingredients that penetrate the enamel to break down stains and lighten the teeth. The blue light technology helps to accelerate the whitening process, resulting in a brighter and whiter smile. With regular use, iWhite teeth whitening can help to achieve a noticeable improvement in the whiteness of the teeth, giving you a brighter and more confident smile. **