This research focuses on debating the negative impact on dental enamel produced by unhealthy diet, some alcoholic and non-alcoholic drinks, smoking, drug use, inadequate hygiene conditions due to poor lifestyle and physical-chemical activities. These factors denature the quality of dental enamel, and the demineralization process begins resulting in caries and periodontal diseases. Caries are the most common diseases of the oral cavity that, if not treated in time, lead to dysfunctional mastication, impaired smile, gingival inflammation, abscess, and unbearable pain. The research also addresses the remineralization of dental enamel using materials and composites based on hydroxyapatite that are capable of producing beneficial effects for strong and healthy teeth. Evaluating caries prevention methods is absolutely essential, but the most important of all is educating children from an early age that healthy teeth require proper personal hygiene.