Patent RU-2745698-C1 (RU)
Inventor: Smirnova Aleksandra Vladimirovna
IPC: A61C7/00
Filed: 2020-07-15
Granted: 2021-03-30
Abstract: FIELD: medicine, dentistry. 
     SUBSTANCE: invention relates to the field of medicine, namely dentistry, and is intended for application when predicting the risk of progression of localized periodontitis of traumatic etiology.  duration of the disease and the previously performed treatment with and without teeth splinting are assessed and a clinical and laboratory study is performed, including an assessment of the severity of the localized periodontitis of traumatic etiology (LPTE), defined by the depth of periodontal pockets, the level of bone resorption and pathological tooth mobility, determination of C-reactive protein (CRP) and entropy of differential blood count (EDBC), as well as an X-ray examination of the dentoalveolar apparatus is performed, including assessment of resorption and visualization of the localized foci of disappearance of the jaw bone alveolar section tissue pattern, the integrity and shape of the interdental septum contours, as well as Laser doppler flowmetry (LDF), assessing the microcirculation state of periodontal tissues, followed by assignment of points to each prognostic indicator. With disease duration of 5 years or more, 1 point is assigned, less than 5 years to 3 years - 2 points, less than 3 years - 1 point, previously performed treatment without teeth splinting is assigned 1 point, and treatment with splinting is assigned 3 points. The indicator of the average severity of the localized periodontitis of traumatic etiology, where the depth of periodontal pockets is from 4 to 6 mm, the degree of bone tissue resorption varies from 1/3 to 1/2 the length of the tooth root, pathological mobility is within the I-II degree according to Miller scale in Flesar modification, is assigned 1 point; 3 points are assigned to mild severity, with the depth of periodontal pockets less than 4 mm, the degree of bone tissue resorption up to 1/3 of the length of the tooth root and lack of mobility; C-reactive protein (CRP) with a level exceeding 3 mg / l is assigned 1 point, up to 3 mg / l - 3 points. The EDBC indicator in case of unsatisfactory adaptation is assigned 1 point, 2 points are assigned in case of intense adaptation, and 3 points are assigned in case of normal adaptation. X-ray examination according to the presence of bone resorption of the jaw bone alveolar section with atrophy to the ½ length of the tooth root is assigned 1 point; 2 points are assigned in case of bone atrophy up to 1/3 of the length of the tooth root, and 3 points are assigned in case of absence of the resorption visible signs. 1 point is assigned if there is a visualization of the localized foci of disappearance of the jaw bone alveolar section tissue pattern available; in its absence 3 points are assigned; if there is an interrupted shape of the contours of the inter-dental septum available and in case of presence of notches 1 point is assigned, and if the interrupted shape and notches are absent 3 points are assigned. 1 point is assigned when there are arithmetic mean values of the periodontal tissues blood microcirculation (BM) index less than 7 perfusion units; 2 points are assigned when having the values from 7 to 9 p.u; 3 points are assigned when having a value exceeding 9 perfusion units. Predicting the risk of progression of the localized periodontitis of traumatic etiology is estimated by the following formula:  where k i  is the prediction coefficient, A is the score rate of each predictive index from 1 to 3 points, k is the weight coefficient of each predictive index, and at the value Σ<13,235 the risk of progression of the localized periodontitis of traumatic etiology after comprehensive treatment from 6 months to 1 year after treatment, and with a value of Σ≥13.235 the absence of the risk and the duration of the positive clinical effect preservation for more than 1 year are predicted. 
     EFFECT: method for predicting the risk of progression of the localized periodontitis of traumatic etiology after comprehensive treatment allows to optimize the treatment plan where there is evidence of risk factors and to increase the complex treatment effectiveness.  
     1 cl, 4 tbl, 5 ex, 2 dwg