The obtained results made it possible to reveal a direct dependence of the class and type of dentition defects on the age of the examined contingent. With age, the length of dentition defects increases, the specific weight of Class I and Class II defects increases, and Class III defects according to Kennedy decrease; at the same time, a combination of final and included defects and the appearance of defects in the frontal area is observed. This indicates the need for a differentiated approach to planning the restoration of tooth rows with orthopedic structures, taking into account the age aspect.
It has been proven that the complex mechanism of teeth and bone tissue development in pigs and the sequence of their replacement are similar to that of humans. The authors proved at the molecular level the homogeneity in the establishment, differentiation and development of the lower jaw. Processes of modeling and re-modeling.
The set of conducted studies showed that on its basis it is possible to evaluate the dynamics of reparative osteogenesis processes using different osteoplastic materials.This study indicates the prospects of further clinical study of the processes of restoration of lost bone structures when using various modifications of osteoplastic materials.
Since the use of autogenous bone tissue as a bone-plastic material is the gold standard for replacing post-extraction and cavity defects of the jaws, we have developed a method of surgical pre-prosthetic preparation of the cellular process using autograft of our own production, namely particles of autogenous mineralized dentin.
The results of our clinical observations and study of a set of indicators prove the high efficiency of treatment of patients with defects of the cellular process based on the developed method of pre-prosthetic surgical preparation using an autograft of our own production, namely particles of autogenous mineralized dentin. The proposed method of reconstructive surgery allows you to significantly shorten the treatment period, reduce the cost of pre-prosthetic preparation and, most importantly, expand the possibilities of further orthopedic treatment, improve its quality and increase the service life of the corresponding orthopedic constructures.
For the first time, we developed a mathematical model of the influence of stresses in a tooth depending on the amount of bone tissue atrophy. The obtained formula for determining the maximum stresses depending on the atrophy of bone tissue. This mathematical model allows you to predict the choice of the most optimal orthopedic design depending on the amount of bone atrophy, which in turn will affect the terms of its operation.
On the basis of the obtained results, we have developed a new method of surgical pre-prosthetic preparation of the cellular process using autograft of our own production, namely particles of autogenous mineralized dentin. For this, the Smart Dentin Grinder (Kometa Bio, USA; Declaration of Conformity No. 001-2019 dated November 25, 2019) was used to obtain an autograft. Using the Smart Dentin Grinder, you can easily turn an extracted tooth into a dentin autograft ready for transplantation in just a few short steps.
We established statistically significant differences between the indicators of the optical density of bone tissue in the comparison groups. The obtained results of a comparative study of the state of the optical density of the bone tissue of the cellular processes of the jaws in patients at various stages of bone tissue reconstruction objectively proved the presence of a gradual increase in the density of bone tissue in the areas of application of osteoplastic materials.
We also conducted an analysis of the stability of implants in patients who underwent repair of cellular process defects using our proposed method and found a tendency towards an increase in the stability of dental implants. The highest average KSI values were in patients who underwent pre-prosthetic surgical preparation of the cellular process using a dental autograft of their own production followed by dental implantation.
We have confirmed that at the end of bone reconstruction and the beginning of orthopedic treatment (with the help of dental implants and bridge prostheses), the value of the specific density of bone tissue reaches high values, which causes osseointegration of implants and normalizes remodeling of bone tissue, which contributes to slowing down the processes of atrophy and extending the period of functioning fixed bridge prostheses.
Key words: dentition defects, bone-plastic materials, atrophy of the cellular process, computer tomography, orthopedic structures, implants, osseointegration, bone tissue defects, cellular part of the lower jaw, bone tissue remodeling. Branch-Medicine.
