Mandibular Angle Components and their Role in Clinical Dentistry
Tatyana D. Dmitrienko , Violeta T. Yagupova , Ilya N. Yukhnov
Acta Universitatis Dentistriae et Chirurgiae Maxillofacialis ›› 2024, Vol. 2 ›› Issue (3) : 131 -140.
Mandibular Angle Components and their Role in Clinical Dentistry
BACKGROUND: Mandibular angle components enable assessment of relevance during variant anatomy studies and help in the diagnosis of gnatic malocclusion.
AIM: To determine the key parameters of mandibular angle components and their role in clinical dentistry.
MATERIALS AND METHODS: A retrospective analysis of 65 teleradiology scans with signs of physiologic occlusion, 12 X-ray images with mesial occlusion, and 16 X-ray images with distal occlusion was performed. The Go mandibular angle point was used for drawing a vertical line perpendicular to the skull base line N-Se. The resulting gonional vertical line divided the mandibular angle into two components: the mandibular ramus angle and the mandibular body angle.
RESULTS: Regardless of the mandibular angle, the mandibular ramus line deviated from the gonional vertical line by 6° to 9°. In Angle Class III malocclusions, the mean mandibular ramus angle was 18.03°±1.22°. Distal occlusion was characterized by an angle of less than 5°. Gnatic malocclusions were characterized by a sagittal line that was not parallel to the nasal and subnasal vertical line and tangent to the mandibular ramus.
CONCLUSIONS: Variability in mandibular angle components due to the growth of the gnathic face part has been identified. The study findings can be used in clinical practice for the diagnosis of malocclusion and complex treatment planning.
teleradiology / physiologic occlusion / sagittal malocclusion / occlusal plane
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