What is the difference between enamel lamella and crack?

Enamel lamellae are defects in tooth enamel that result from incomplete mineralization, while cracks in enamel are actual fractures in the enamel surface that can extend into deeper layers. Enamel lamellae are usually superficial and do not necessarily compromise the structural integrity of the tooth, whereas cracks can weaken the enamel and potentially lead to tooth sensitivity or decay.