Morphometric Research Significance in Determination of Variability of Topographic Relations of the Mandible Structures on the Example of the Sagittal Section of Its Angle

Abstract

The aim of the work – to carry out morphometric analysis of the angle of the mandibleon the sagittal section and determine its interdependent structural variability from thebone tissue atrophy caused by the loss of the masticatory teeth.Material and methods. 136 CT images were analyzed by means of the standardizedsoftware “Vatech original 2020” and the horizontal optional panel sizing tool todetermine the measurements (mm).Results. Morphometric values of the right mandibular angle at a distance from the edgebehind the molar fossa to the mandibular canal (MC) in the experimental groups arerepresented by an average value of 9.50 mm, and in the control group – 10.43 mm. Onthe left side, an average value of MC is 9.75 mm in the experimental groups, comparedto 11.26 mm in the control group. The distance from the mandibular canal to the outercortical edge of the middle of the right mandibular angle (RMB) is, on average, 17.68mm in the experimental groups and 18.92 mm in the control group (with preserveddentition rows). In turn, the left side is characterized by an RMB distance with anaverage value of 17.02 mm in the experimental groups and 19.19 mm in the controlgroup.Conclusions. Early tooth loss in the distal parts of the mandible results in irreversiblemorphometric changes of the bone tissue of the mandibular angle. 2. Bone tissuestructures, forming the mandibular angle, undergo atrophic processes with theprevalence on the cheek side. 3. Both morphological development and atrophicprocesses asynchronicity between left and right sides of the mandible at loss of themasticatory teeth group preserve their regularity.