Based on complex clinical-instrumental examination of 21 (13m., 8w.) patients with partial adentia clinical manifestations of imbalance dental arches occlusal plane has been studied. It was found that imbalance of occlusal plane in case of partial adentia is manifested by migration of teeth limited defect of dental arch and teeth contact with dental arch defect with possibility of occlusal interference appearing and blocking mandible movements. These changes influence occlusal imbalance with morphological-functional disturbances on local and local-regional level. The particularities of the partially extended edentulous prosthetic field are determined by the number, topography, axis of implantation and periodontal value of the remaining teeth; the absence or presence, the number and topography of additional gaps, the degree of atrophy of the alveolar ridges, the characteristic of the fibromucosa. In the case of extended partial edentation, the unevenness of the occlusal plane is manifested by the migration of the adjacent teeth and those antagonistic to the gaps, with the possibility of blocking the movements of the mandible in the event of the installation of occlusal interferences. These changes influence the installation of occlusal imbalance with morphofunctional disturbances at the local and locoregional level, which also argues for the need to level the occlusal plane.