Korobeinikova Yu. L., Khavalkina L. M., Korobeinikov L. S., Dubyna V. O. Dubrovina O. V.
An important task of a dentist is to prevent aggravations that arise after treatment, including prosthetics, and can contribute to the development of periodontal complications. After all, even after successful treatment, a number of complications develop that are difficult to detect clinically. A number of authors in foreign and domestic publications, devoted to early diagnosis and treatment of periodontal tissues, draw attention to the importance of the above issues. Cone-beam computed tomography (CBCT) is the technique that makes it possible to see tissues in a three-dimensional image of the studied area, while the radiation dose is minimal. On a panoramic or intra-oral target image, it is difficult to detect changes in the vestibule-oral direction due to the fact that there is an overlapping of the shadow of the teeth, which makes it impossible to accurately diagnose changes in the periodontal tissues. We used the EzD2009 software and the basic interface to work in the МPR (multiplenar reformation) option – multiplenar visualization of a 3D image. The paper analyzed resorption in the area of 60 teeth on which metal-ceramic dentures were put. Patients used the dentures for 3-5 years, the age of the subjects was 35-40 years. Statistical analysis was carried out using the MS Excel Office 2016 and EZR 1.34 software. The value of the studied parameter on the medial side was minimally 0.9 mm and a maximum of 9.3 mm, from the distal side – 0.7 and 7.1 mm, from the vestibular side – 0.3 and 7.7 mm, from the oral side – 0.6 and 9.2 mm, respectively. The median values for estimation of the bone resorption on the medial surface were 1.2 (1.1-3.1) mm, on the distal surface – 0.9 (0.8-2.8) mm, on the vestibular surface – 1.3 (0.3-2.7) mm, and on the oral surface – 0.7 (0.6-3.3) mm. The mean value of the bone resorption of the alveolar process on the medial side was 1.84±0.23 mm, from the distal side – 1.49±0.17 mm, from the vestibular side – 2.87±0.20 mm, and from the oral side was 2.88±0.22 mm. When comparing the above parameters, statistically significant differences were found between the values of different surfaces of the abutment tooth (p=0.028). At the same time, the resorption rate of bone tissue on the medial side was statistically significantly lower compared to that on the vestibular (p=0.010) and the oral (p=0.008) surfaces, and did not differ from that on the distal side (p=0.612). The value of the estimated parameter on the distal side of the abutment tooth was also significantly lower compared to the vestibular (p=0.006) and the oral (p=0.005) surfaces. No statistically significant differences between the parameters of the vestibular and oral surfaces were found (p=0.913). The resulting CBCT data indicate significant resorption of the bone tissue of the alveolar process of the jaw with a difference in the parameters from the medial, distal and vestibular-oral sides. Further detailed study of this parameter is a reliable factor in the diagnosis of periodontal changes in patients with fixed metal-ceramic dentures, which allows us to detect more pronounced changes on different surfaces around the tooth.The prospect of further studies is a comparative analysis of the assessment of the outcomes of resorption of the alveolar processes of the upper and lower jaws, according to the CBCT, in patients using metal-ceramic dentures in the frontal and lateral sections and vital teeth.
«Bulletin of problems biology and medicine» Issue 2 Part 2 (165), 2022 year, 214-220 pages, index UDK 616.311.2-071
