The paper presents the most recent reports on celiac disease, especially its manifestations within the oral cavity. Particular attention should be paid to typical dental enamel defects with a various degree of advancement: discolorations, horizontal groves and pits, and even significant structural destruction causing the change of the dental crown. Symmetric location of defects within all dentition sections, and within the same anatomic groups of teeth (the most frequently: incisors and first permanent molars), is specific for celiac disease. The changes described above may be the only manifestation of celiac disease; therefore, in the case of their occurrence further studies towards gluten intolerance are recommended even when other symptoms are not present. In celiac patients, recurrent aphthae and other disorders of the oral mucosa such as ulceration, erythema, atrophic glossitis, as well as dryness and a burning sensation (particularly of the tongue) may be present, which may be caused by malnutrition. Delayed tooth eruption may also be a consequence of alimentary deficiency in celiac disease.