Structural lesions refer to abnormal physical changes in the body's tissues or organs, often caused by injury, disease, or congenital abnormalities. These changes can be seen through medical imaging techniques such as X-rays, CT scans, or MRIs. Structural lesions can affect the function of the affected tissue or organ, leading to symptoms and health problems. Treatment for structural lesions may involve surgery, medication, or other interventions to address the underlying cause and improve the patient's health. **

Lesions in the brain can be caused by a variety of factors, including traumatic brain injury, infections, tumors, stroke, and autoimmune diseases. Traumatic brain injury can result in physical damage to the brain tissue, while infections such as meningitis or encephalitis can lead to inflammation and damage. Tumors can also cause lesions by disrupting the normal structure of the brain, and strokes can result in areas of dead tissue due to lack of blood flow. Autoimmune diseases like multiple sclerosis can cause the immune system to attack the brain, leading to the formation of lesions. **

MRI with 3 small lesions typically indicates the presence of three abnormal areas in the body that appear different from the surrounding tissue. These lesions could be caused by various factors such as inflammation, infection, or injury. Further evaluation and testing may be needed to determine the exact cause of these lesions and to develop an appropriate treatment plan. **

Having lesions in the brain does not automatically mean a person has multiple sclerosis. Lesions in the brain can be caused by various conditions such as migraines, infections, strokes, or other inflammatory diseases. A diagnosis of multiple sclerosis typically involves a combination of clinical symptoms, imaging studies showing lesions in the brain and spinal cord, and other diagnostic tests. It is important to consult with a healthcare provider for a proper evaluation and diagnosis. **

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. **

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. **