Adolescent 1 Adult 1 Age Factors 1 Cross-Sectional Studies 1 DMF Index 1 DMF index 1 Decayed, missing and filled teeth index 1 Dental Caries 1 Dental Plaque 1 Educational Status 1 Female 1 Fluorosis, Dental 1 Germany Health Knowledge, Attitudes, Practice 1 Humans 1 Knowledge, attitude and practice survey 1 Male 1 Middle Aged 1 Oral Health 1 Oral Hygiene 1 Oral health 1 Refugees 1 Sex Factors 1 Tooth Loss 1 Young Adult 1 adolescent 1 adult 1 age 1 attitude to health 1 cross-sectional study 1