Features of the location of the mandibular and occlusive planes on teleradiograms with different types of facial growth

Aim. Determine the features of the location of horizontal planes on lateral teleradiograms, taking into account the type of growth of the gnathic part. Material and methods. 56 teleroentgenograms (TRG) were analyzed, which were divided into 3 groups, taking into account the magnitude of the angle of the lower jaw. Points on the jaws were used taking into account the generally accepted diagnostic protocol. The position of the mandibular, occlusive and alveolar-occlusive horizontals was determined. Results. The mandibular angle with the neutral type of growth was (121.07 ± 1.24)°. With a horizontal type of growth, the angle of the lower jaw was significantly smaller and amounted to (113.22 ± 1.17)°. The vertical type of growth was characterized by an angle of (126.53 ± 1.68)°. The mandibular horizontal in all observations was parallel to the lower alveolar-occlusive line of the teleroentgenogram. The angle between the upper and lower alveolar-occlusive lines was (25.06 ± 0.79)° with all typological variants of the gnathic part of the face. Conclusion. The results of the study showed that the mandibular horizontal is parallel to the alveolar-occlusive line of the lower jaw, and the angles between the alveolar-occlusive lines of the upper and lower jaw were about 25°, regardless of the type of growth of the gnathic part of the face. The data obtained can be used in clinical dentistry in the analysis of the location of the occlusive and prosthetic planes.