COMPARATIVE ANALYSIS OF THE DENSITY OF THE CORTICAL LAYER OF BONE TISSUE OF THE PROCESSES AND THE ANGLE OF THE MANDIBLE IN ACQUIRED DENTITION DEFECTS
DOI:
https://doi.org/10.35220/2078-8916-2023-50-4.10Keywords:
bone atrophy, mandibular processes, computer tomography.Abstract
Purpose of the study. To conduct a comparative analysis of the density of the cortical layer of the bone tissue of the processes and the angle of the mandible in acquired dentition defects to identify their average parameters according to age periods and study groups. Research methods. The study involved 136 (one hundred and thirty-six) computed tomographic cone (9 X 16) scans of the human face as objects of study, corresponding to two periods of adulthood of postnatal ontogeny (I period of adulthood – men 22-35 years old, women 21-35 years old; II period – men 36-60 years old, women 36-55 years old) and assigned to three groups, depending on the distribution of the dentition defect in the lateral parts of the mandible. The subject of the study is the density of bone tissue within the cortical plate at the top of the articular and coronoid heads, as well as the areas of the mandibular angle that were primarily subjected to remodeling processes or pathological changes. Statistical analysis is interpreted in qualitative and quantitative terms, using non-parametric evaluation criteria as mean (M) and standard deviation (±σ). Scientific novelty. The average values of the studied quadrant of the articular process head, which is the target and priority object that is primarily exposed to pathoetiologic factors, are M = 1165 conventional gray units (CGU) on the right side in the first age period of postnatal ontogeny, where = σ ±318,2 and M = 1074 CGU, where ±280,9 on the left side. In the second age period of postnatal ontogeny, M = 1123 CGU, where σ = ±270,9 on the right side and M = 995,0 CGU, where ±201,8 on the left side, under the influence of acquired factors that stimulate the activity of remodeling processes. Conclusions. The change in the density of the cortical layer of the bone tissue of the mandibular processes is synchronous with the change in the density of the cortical layer of its angle, as the main stable structural, morphological barrier in the case of loss of the masticatory group of teeth.
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