Persin L S
Stomatologiia (Mosk). 1993 Apr-Jun;72(2):60-2.
The author suggests a classification of the occlusion abnormalities, based on the denture occlusion abnormalities determined by the sagittal, vertical, and transversal planes. He distinguishes the abnormalities in the occlusion of antagonist teeth and four degrees of disorders of the coordination activity of antagonist and synergist muscles.