Along with the functional and aesthetic results, prosthodontic constructions must correspond to biological needs as well. They don't have to irritate the periodontal tissue, alveolar bone and gingiva. The aim of the study was to investigate gingival status under modified artificial teeth using cytomorphology (PAP) methods. Cytological investigations were carried out in 30 patients. 19 of them were using modified crowns and 11--modified bridges. Gingival status was marked using CD I and II indexes. Cytomorphometric investigations showed that modified prosthodontic constructions do not harm gingivas which are under the modification. Dynamic cytological changes found at the time of treatment represent individual biological reaction to the artificial teeth.