We investigated 322 patients, 20 and 40 old to find connections between the occurrence and localisation of facets, malocclusion and dynamic occlusion and estimated special aspects of periodontal reactions. The symptoms "anterior crowding", "increased overbite and overjet" didn't effect an increasing of frequency of facets in comparison with eugnathic denture. We found, that the facets decreased in lateral segments if the overbite became deeper and on the other hand number of facets increased with advancing years. The localisation of facets and occlusal guidance of dynamic occlusion coincided only in one third of investigated cases. Balancing and hyperbalancing teeth showed frequent facets. There was a direct relationship between increasing frequency and intensity of gingival retraction and the level of the abrasion of the hard tooth substance.