Dental Admissions Test (DAT) Practice Test

Enamel is recognized as the hardest substance in the human body, primarily composed of hydroxyapatite crystals, which provide it with exceptional strength and durability. This hardness is crucial for protecting the underlying dentin and pulp from physical wear, acid erosion, and other forms of damage that might be encountered during chewing and biting.

Enamel's unique structure contributes to its hardness, with tightly packed mineral crystals forming a robust surface that can withstand significant pressure. This characteristic is essential for maintaining oral health, as it forms the primary defense mechanism against cavities and sensitivity caused by external stimuli.

Understanding that enamel does not regenerate after damage is key, as it can only be remineralized to some extent through dietary minerals and fluoride treatment, but if significantly worn away or damaged through decay, it cannot replace itself. This knowledge informs dental care practices, emphasizing the importance of protecting enamel through good oral hygiene and dietary habits.