It is difficult to determine if your friend is lying about her dentist appointment without more information. If you have reason to doubt her honesty or if her story seems inconsistent, it may be worth discussing your concerns with her directly. However, it is also important to consider that there could be valid reasons for any discrepancies in her story, such as a last-minute cancellation or rescheduling. Ultimately, open communication and trust are key in any friendship. **

It is difficult to determine the severity of her health condition without more information. Critical health conditions can vary greatly, and it would be best to consult a medical professional for an accurate assessment. If you are concerned about her health, it is important to seek medical attention as soon as possible. **

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. **

The female dentist wearing a sling on her arm is Dr. Patel. She is easily identifiable by the white lab coat she is wearing and the sling on her right arm. Dr. Patel is still able to perform her duties as a dentist despite her injury. **

It ultimately depends on the individual's comfort level and the context of the situation. If the person feels confident and wants to make a friendly gesture, smiling at the girl can be a good way to initiate a positive interaction. On the other hand, if they want to engage in a conversation and get to know her better, talking to her would be more appropriate. It's important to consider the girl's body language and response to determine the best approach. **

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. **