Stomatologiya最新文献

{"title":"[Application of the instrumented indentation method in vitro for determining the basic physico-mechanical properties of natural tooth hard tissues].","authors":"F F Losev, A A Muzaeva, I Ya Poyurovskaya, F S Rusanov, M I Petrzhik","doi":"10.17116/stomat20261050115","DOIUrl":"https://doi.org/10.17116/stomat20261050115","url":null,"abstract":"<p><strong>Objective: </strong>The aim of the study was to determine the physical and mechanical properties of dental hard tissues, enamel, and dentin, in vitro.</p><p><strong>Materials and methods: </strong>The study material consisted of premolars extracted for medical reasons, pre-sawn in half in the sagittal (longitudinal) direction, followed by fixation in a plastic block and polishing to a mirror shine to obtain sections containing enamel, dentin, and the dentinoenamel junction area. The study method consisted of testing the prepared tooth sections by nanoindentation using a NaNo Hardness Tester with a triangular pyramidal Berkovich indenter.</p><p><strong>Results: </strong>The microhardness and elastic modulus of enamel and dentin, as well as the dentin-enamel junction area, were determined. The displacement indices of the surface layers of dentin and enamel under maximum load and after unloading, determined during indentation, made it possible to determine the elastic properties of the tested dental tissues based on the coefficient of elastic recovery.</p><p><strong>Conclusion: </strong>The microhardness, elastic modulus, and elastic recovery coefficient of dentin and enamel obtained as a result of an in vitro study using the nanoindentation method showed good reproducibility of the test results and consistency of the obtained nanoscale indicators with the results of tests on macro-samples using standard methods.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 1","pages":"5-9"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147310996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Assessment of the relative position of the elements of the temporomandibular joint in the analysis of computed tomograms].","authors":"A G Nadtochiy, S V Tekucheva, F F Losev, A A Skalskaia","doi":"10.17116/stomat202610501158","DOIUrl":"https://doi.org/10.17116/stomat202610501158","url":null,"abstract":"<p><strong>Objective: </strong>To develop an improved methodology for assessing the relative position of the elements of the temporomandibular joint in the analysis of computed tomograms and analyze its reproducibility.</p><p><strong>Materials and methods: </strong>Using an improved technique, calculations of TMJ parameters were performed on computed tomograms (CT) of the facial region of the skull in 15 patients aged 18-25 years. CT scans were performed for patients according to orthodontic indications. To assess the reliability of the proposed technique, it was analyzed by two operators - a radiologist with 10 years of professional experience and a first-year clinical resident. Two series of all measurements were performed with an interval of 7 days (T1 and T2, respectively). The intraoperative and interoperative reproducibility of the method was evaluated using the intraclass correlation coefficient (ICC). An ICC value greater than 0.75 was interpreted as a sign of good reproducibility. Additionally, the consistency of measurements between operators was analyzed using the Bland-Altman method.</p><p><strong>Results: </strong>Using an improved technique, 960 measurements were performed and analyzed. There were no statistically significant differences between the measurement series for all the parameters studied, regardless of the operator (<i>p</i>>0.05). Analysis of the intraoperative and interoperative reproducibility of the method showed that the ICC values for all parameters ranged from 0.82 to 0.94 and from 0.78 to 0.95, respectively, which indicated high consistency between the measurement series for both specialists have determined good reproducibility. In general, the analysis of the obtained results indicates the high reproducibility of the proposed methodology.</p><p><strong>Conclusion: </strong>An improved technique has been developed for assessing the relative position of the elements of the temporomandibular joint in the analysis of computed tomograms, which is based on determining the position of the head of the mandible relative to the actual anatomical boundaries of the articular cavity. The proposed technique makes it possible to study TMJ on CT with a high level of reproducibility and can be used for practical and scientific purposes.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 1","pages":"58-67"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147311075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Study of the penetration depth into dentin of sealers based on epoxy resins and eugenol during root canal filling using the partially coherent interference method].","authors":"L I Shalamai, E Yu Mendosa, E E Maiorov, V Yu Vashneva, A V Yartseva, S S Ermaeva","doi":"10.17116/stomat202610503147","DOIUrl":"https://doi.org/10.17116/stomat202610503147","url":null,"abstract":"<p><strong>Objective: </strong>To study the depth of penetration into the dentin of root canals of teeth sealer for filling root canals partially coherent interferential tomograph.</p><p><strong>Material and methods: </strong>Studied instrumentally and medicamentally treated root canals of seven removed according to clinical indications permanent teeth before obturations and after their filling by the method of lateral compaction of gutta-percha pins with the use of sealer based on epoxy resins and eugenol. The teeth were divided into 3 groups. In group 1, root canal obturation was performed using the AN Plus sealer (based on epoxy resins); in group 2, using the Vyadent sealer (based on epoxy resins); and in group 3, using the Tiedent zinc oxide eugenol cement as the sealer. The reflection coefficient was measured in 20 root canals. A partially coherent interferometric tomograph was used to study the penetration of the dental sealer into the hard tissues of the tooth roots. The study involved. sections of tooth roots corresponding to the boundaries of the mouth and middle third of the root canals.</p><p><strong>Results: </strong>The dependence of the reflection coefficient on the depth of the hard tissues of each sample's root was obtained after instrumental and medicamentous treatment of the root canal before and after obturation. It has been established that the AH-Plus epoxy-amine sealer from Dentsply penetrates 50 to 100 microns deeper into the hard tissues of the tooth root canal than the Vyadent and Tiedent sealer from VladMiVa. The Tiedent zinc oxide eugenol filling material demonstrated better penetration into the dentin structure of the root canal compared to the Vyadent epoxy-based sealer. All of the tested sealants had a penetration depth of at least 200 microns.</p><p><strong>Conclusion: </strong>All the presented samples can be used to fill root canals without compromising the quality of restoration.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 3","pages":"47-53"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148279224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Clinical aspects of the effect of aligners with a repositioning splint on the temporomandibular joint].","authors":"O I Arsenina, A N Ryakhovsky, N M Lebedeva, N V Popova, A V Popova","doi":"10.17116/stomat202610502143","DOIUrl":"10.17116/stomat202610502143","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the effect of aligners with the effect of a repositioning splint on changes in the parameters of the articular gap and articular symptoms in patients aged 18 to 45 years.</p><p><strong>Material and methods: </strong>A clinical and radiological examination and treatment were performed on 40 patients with dental malposition and TMJ dysfunction. The patients were divided into groups: group 1 (25 patients: 1 subgroup-11 patients with dislocation of the articular disc with reposition, 2 subgroup - 6 patients with dislocation of the articular disc without reposition, 3 subgroup - 8 patients with absence of intraarticular disc position disorders.) - orthodontic treatment using aligners with the effect of repositional splint; Group 2 (15 patients) - orthodontic treatment using aligners without mandibular reposition; Aligners with the repositional splint effect had inclined planes (<i>n</i>=16) or \"wings\" (<i>n</i>=9) in their design. The clinical and radiological assessment of the effect of aligners with a repositioning effect was carried out according to the following parameters: clinical parameters - pain syndrome, articular noises, mouth opening volume, hypertonicity of the masticatory muscles, occlusal contacts, radiological parameters - width of the articular gap on CLC, position of the mandibular heads on CLC and MRI of the TMJ, condition of the cortical layer, position of the articular disc on MRI.</p><p><strong>Results: </strong>According to the results of the study, 92% of patients in the first group achieved centration of the mandibular heads in the articular fossa, 100% of patients experienced no joint symptoms, 88% of patients had normal mouth opening amplitude, and 70.6% of patients with articular disc dislocation had restored articular disc position. In group 2 patients, the mandibular heads were centered only in 13.3% of cases, TMJ pain was relieved in 60% of cases, mouth opening was normalized in 47.3% of cases, and the articular disc was repositioned in 6.7% of cases.</p><p><strong>Conclusion: </strong>The use of aligners with the effect of a repositioning splint not only allows you to achieve uniform occlusal contacts, but also helps to maintain the mandibular heads in a therapeutic position, having a positive effect on the temporomandibular joint.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 2","pages":"43-50"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Comprehensive approach to the diagnosis and conservative treatment of galvanic syndrome in dental practice].","authors":"A G Volkov, V M Grinin, Q Liu, A A Smirnov, A D Dikopov, Yu O Paramonov","doi":"10.17116/stomat202610504146","DOIUrl":"https://doi.org/10.17116/stomat202610504146","url":null,"abstract":"<p><strong>Objective: </strong>Of this work is to evaluate the effectiveness of an algorithm for comprehensive diagnosis and conservative treatment of galvanic syndrome developing against the background of electrogalvanic processes in the oral cavity.</p><p><strong>Material and methods: </strong>72 people were examined. The algorithm of complex diagnostics consisted in the sequential carrying out of three stages of research (E1, E2, E3). On E1, the electromotive force (EMF) between metal containing structures was determined; on E2 - metal-containing structures, which are in a state of electro-galvanic activity; E3 - the ability of metal-containing structures to reduce their electro-galvanic activity. Patients who were found to have the ability to reduce their electro-galvanic activity with metal-containing structures were prescribed conservative treatment, which consisted of daily (10 days) mouth rinsing with a sodium thiosulfate solution.</p><p><strong>Results: </strong>Electrogalvanic phenomena were detected in 56 out of 72 individuals. At stage E1, among these 56 patients, electromotive force between metal-containing constructions capable of inducing electrogalvanic processes and significantly different from the physiological norm of 50 mV was detected in 43 individuals, accounting for 76.8% (<i>p</i><0.05). The difference in electrochemical potentials of metal-containing constructions in these patients was 117.8±22.3 mV. At stage E2, metal-containing constructions in a state of electrogalvanic activity were identified in 91.1%, that is, in 51 out of 56 patients. The difference in hydrogen index values in these patients was 0.8±0.11, which was significantly higher than the reference value of 0.6 (<i>p</i><0.05).At stage E3, a decrease in electrogalvanic activity of metallic constructions was detected in 60.7%, that is, in 34 out of 56 patients. In 20 out of 34 patients (58.8%), both immediately after treatment and after one month of follow-up, complaints were absent, and the difference in hydrogen index values was significantly lower than 0.6, amounting to 0.3±0.07 (<i>p</i><0.05), which indicated the effectiveness of the proposed method.</p><p><strong>Conclusion: </strong>The conducted study demonstrated that the use of a comprehensive examination algorithm for detecting electrogalvanic processes in the oral cavity is justified. Conservative treatment, in the presence of a positive test for reduction of electrogalvanic activity of metallic constructions, allows complete elimination of symptoms of galvanic syndrome in 58.8% of cases.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 4","pages":"46-50"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148713873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Microcoating is a further improvement in the aesthetics of monolithic restorations (literature review)].","authors":"F F Losev, D K Skugareva, E E Dyakonenko","doi":"10.17116/stomat202610501180","DOIUrl":"https://doi.org/10.17116/stomat202610501180","url":null,"abstract":"<p><p>Due to the high demand for zirconia dentures, a unique method has been developed to improve the appearance of zirconia orthopedic structures, named micro layering. This method is applicable both in the frontal area and in the posterior sections of the patient's dentition, and is a technique for applying a very thin layer of material over full-contour restorations. Ceramic micro layering systems provide a fast, effective and aesthetically predictable result for monolithic structures, made of both lithium disilicate and zirconium dioxide, including multilayer zirconia. Micro layering offers the effect of depth, emphasizes the surface texture, and allowing the orthopedic structure to be integrated into the patient's dentition without using of time-consuming and labor-intensive procedures of veneering and step-by-step firing of complex veneered structures. Micro layering is aimed at detailing and working out certain surfaces or surface areas of dentures, for example, detailing fissures in the area of the occlusional contacts of posterior teeth.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 1","pages":"80-84"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147311102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Mandibular donor site healing after bone graft harvesting in cleft patients: a comparative study of rotary bur and piezoelectric osteotomy techniques].","authors":"A L Ivanov, E I Reshetnyak, S A Sukacheva","doi":"10.17116/stomat202610501137","DOIUrl":"https://doi.org/10.17116/stomat202610501137","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate mandibular donor site healing after cortical bone graft harvesting in cleft patients, comparing outcomes of osteotomies performed with rotary burs and piezosurgery.</p><p><strong>Material and methods: </strong>Fifty-three patients (64 bone grafting procedures) were included. Autogenous grafts were harvested from the mandibular body using either a rotary bur (<i>n</i>=43) or a piezoelectric device (<i>n</i>=21). Healing was assessed by CT 5-24 months postoperatively using a 4-grade scale. Statistical analysis employed the Shapiro-Wilk test, Mann-Whitney U test, and Spearman correlation (<i>p</i><0.05).</p><p><strong>Results: </strong>Mean healing scores were 3.7±0.6 for the rotary group and 2.1±1.0 for the piezosurgery group (<i>p</i><0.01). No significant correlation was found between postoperative time and healing (<i>r</i>=0.11 and -0.37, respectively). In the piezosurgery group, patients older than 13-14 years demonstrated reduced bone regeneration and higher outcome variability.</p><p><strong>Conclusion: </strong>Piezosurgery did not improve bone healing at the mandibular donor site and was associated with slower regeneration compared with rotary osteotomy. Rotary burs provided more stable and predictable results. The advantages of piezoelectric surgery appear primarily technical rather than biological.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 1","pages":"37-42"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147311114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Morphological features of recurrent pleomorphic adenomas of the major salivary glands].","authors":"A M Maybogin, Z Yu Visaitova, T Z Chkadua, A A Ivina, I I Babichenko","doi":"10.17116/stomat202610501131","DOIUrl":"https://doi.org/10.17116/stomat202610501131","url":null,"abstract":"<p><strong>Objective: </strong>To investigate morphological features of recurrent pleomorphic adenoma on the operative material of parotid salivary glands.</p><p><strong>Materials and methods: </strong>40 cases of primary pleomorphic adenomas of the parotid salivary glands and 30 cases of recurrence of this tumor were analyzed. A comparative evaluation of various structural changes in the tumor tissue on the basis of complex morphological and immunohistochemical studies was performed. Frequency analysis between groups was performed using Chi-square and Fisher's exact test. Null hypotheses were rejected at a significance level of <i>p</i>≤0.05.</p><p><strong>Results: </strong>The differences in the morphological patterns of primary and recurrent pleomorphic adenomas of the major salivary glands are presented. It was established that in the group of recurrent pleomorphic adenomas, stromal histological subtype (73.3%), partial absence of the outer capsule (85%), myxomatous changes (83.3%), formation of pseudopodia (86.6%), and multifocal growth pattern (73.6%) were more frequently observed, <i>p</i><0.05.</p><p><strong>Conclusion: </strong>The results obtained reflect the direction of morphogenetic changes in the tissue of recurrent PA, which improves existing understanding of their biological behavior and can be used to develop new effective treatment strategies for this pathology.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 1","pages":"31-36"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147311159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[FDM printing in the correction of temporary orthopedic structures: a study of adhesive strength and tightness of the joint].","authors":"V A Erokhin, D A Trunin, F S Rusanov, M S Chistiakova","doi":"10.17116/stomat202610502117","DOIUrl":"10.17116/stomat202610502117","url":null,"abstract":"<p><strong>Objective: </strong>The aim of this study was to improve the quality of prosthetic treatment through the development of methods for correction and modification of temporary prosthetic constructions using FDM printing.</p><p><strong>Materials and methods: </strong>Substrates made of acrylic resins <i>Belacryl M GO</i> and <i>Tempron</i> were used. Elements made of various polymers (PLA, ABS, PC, PMMA) produced by FDM printing were applied to their surfaces. Adhesive strength was evaluated using a Zwick Roell Z010 testing machine under shear and tensile tests, while the microleakage of the bonding zone was assessed with dye penetration.</p><p><strong>Results: </strong>Preliminary surface treatment with methyl methacrylate monomer provided a statistically significant increase in bond strength (<i>p</i><0.05). The highest values were demonstrated by PLA (up to 137.5±27.1 MPa) and ABS (up to 179.8±41.5 MPa). Microleakage testing revealed the absence of dye penetration in the bonding zone after monomer treatment.</p><p><strong>Conclusion: </strong>The proposed method of correction using FDM printing combined with preliminary substrate treatment improves the mechanical strength and sealing properties of the bonds, confirming its clinical potential for the repair and reinforcement of temporary prostheses.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 2","pages":"17-24"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Possibilities of using dental implants for personal identification in forensic medical practice].","authors":"A V Kamalyan","doi":"10.17116/stomat202610504178","DOIUrl":"https://doi.org/10.17116/stomat202610504178","url":null,"abstract":"<p><p>The article examines constructive, radiological, and material-related features of dental implants that form reproducible forensic identification profiles under conditions of tissue destruction and skeletal fragmentation. Combined CBCT-based morphometry, surface microstructural analysis, and traceological assessment enable typological classification of implant systems and individualized comparison with ante-mortem dental records. The integration of digital manufacturer registries is substantiated as a key factor in improving identification accuracy during mass fatality incidents.</p>","PeriodicalId":35887,"journal":{"name":"Stomatologiya","volume":"105 4","pages":"78-81"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148713924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}