[COVID-induced facial bones necrosis]. / COVID-indutsirovannyi nekroz chelyustnykh kostei.

The article focuses on the clinical manifestation of inflammatory and destructive lesions of the bones of the midface, nose and paranasal sinuses as a long-term complication of COVID-19 with clinical examples provided.

[Radiology department of the Central Research Institute of Dentistry and Maxillofacial Surgery: stages of research work]. / Rentgenologicheskoe otdelenie FGBU NMITs «TsNIIS i ChLKh¼ Minzdrava Rossii: etapy nauchno-issledovatel'skoi raboty.

The stages of the 60-year period of scientific research in the X-ray department of Central Research Institute of Dentistry and Maxillofacial Surgery. The research work was carried out in parallel with the improvement of X-ray diagnostics in dentistry and maxillofacial surgery based on the use of modern specialized X-ray equipment: panoramic radiography of the jaws, linear and panoramic zonography of the maxillofacial region, CT and CBCT of facial bones. For many decades, the department has been developing methodological and organizational foundations for X-ray examination of patients, conducted a comparative assessment of the informative value of X-ray techniques, studied the radiographic features of inflammatory, traumatic, tumor, tumor-like, congenital, post-traumatic and systemic pathological processes in the dental system and maxillofacial region.

[Algorithm of radiological examination of patients with inflammatory and destructive bone changes in lower molars area]. / Algoritm rentgenologicheskogo obsledovaniia patsientov s vospalitel'no-destruktivnymi protsessami kosti v oblasti kornei moliarov nizhnei cheliusti.

The study presents the analysis and comparison of orthopantomogram (OPG) and cone-beam computed tomograms (CBCT) of 62 patients with inflammatory-destructive processes of bone in the lower molars area. The analysis resulted in an algorithm of radiological examination of patients with selected pathologies for diagnosis and definition of further treatment tactics.

[Radiographic manifestations variants of odontogenic inflammatory destructive lesions in lower molars]. / Varianty rentgenologicheskikh proiavlenii odontogennykh vospalitel'no-destruktivnykh protsessov v al'veoliarnoi chasti nizhnei cheliusti v oblasti moliarov.

The analysis and comparison of clinical and radiographic manifestations of odontogenic destructive processes in the area of molars of the lower jaw 54 patients, treated at the outpatient department of surgical dentistry CRID and MS. Set the main features of clinical manifestations depending on the distribution of the destructive process of the bone.

[Methods of roentgenologic study comprehension for appreciation of root canal obturation quality].

Comparison of methods comprehension was done with intraoral roentgenography, orthopantomography (OPG), cone-beam computer tomography (CBCT) on the devices with optical amplifier of roentgenologic image (OARI) and sensor resolution (SR) 2 pair of lines per mm and without OARI with SR 2.5 pair of lines per mm. There were used extracted earlier teeth with adequate root canal obturation. According to the results of the study the image received with the help of CBCT with high SR let have the biggest information volume about filling quality of root canal and root canal structure peculiarities that testified to pro of the method over CBCT with OARI. The most widespread in the practice methods of intraoral roentgenography and orthopantomography not in all cases reflected reliably the root canal obturation degree.

[Endodontic treatment quality analysis according to the computer tomography data].

Endodontic treatment quality of different teeth groups was analysed according to computer tomography data. 1000 dental root canals of 521 teeth of 115 patients of different age groups were studied. The study results testified to low level of endodontic treatment quality. In 71.7% of cases instrumental processing and obturation of dental root canals were fulfilled inadequately. The most often mistake of endodontic treatment was insufficient root canals instrumental processing (62.8%).

[Perfection of dental root canals X-Ray study (lab-clinical study)].

Results of the study testified to the fact that on intraoral X-Ray pictures and orthopantomograms the structure of root canals of all teeth groups were not reflected objectively. The errors of methodical techniques led to considerable loss of their diagnostic comprehension. Conus computer tomography (CCTG) in comparison with spiral computer tomography was more informative and significant method for topographic study of root canals of different teeth groups determinant lower doses of patient's irradiation. Today the most reliable technique for the structure of roots of all teeth groups and root canals spatial location was CCTG in axial projection supplemented by reformative oblique projections. Combination of CCTG before the treatment with intraoral X-Ray pictures after its finishing let objectively assess the quality of the conducted endodontic treatment.

[Diagnostic value of X-ray procedures in dental implantations].

The possibilities of modern X-ray procedures at different stages of dental implantation planning and consequent postoperative control were presented depending upon real clinical situation.

[Comparison of the results of roentgenography, panoramic zonography and computer-aided tomography in some deformations of facial skull]. / Sopostavlenie rezul'tatov rentgenografii, panoramnoi zonografii i komp'iuternoi tomografii pri nekotorykh deformatsiiakh litsevogo cherepa.

Fifty patients with congenital and posttraumatic deformations of the facial skull were examined using effective diagnostic schemes of x-ray examination (including panoramic roentgenography and sonography) and computer-aided tomography. The methods were found to supplement each other. Computer-aided tomography is more useful in posttraumatic deformations, for it helps specify the status of accessory nasal sinuses, detect the changes in the tissues of the eye-ball, optic nerve, and oculomotor muscles, and evaluate the consequences of craniocerebral injuries. The parameters obtained by three dimensional image reconstruction may be used for planning bone repair surgery.

[The x-ray changes in the facial skull in children and adolescents with bite anomalies]. / Rentgenologicheskie izmeneniia litsevogo cherepa u detei i podrostkov s anomaliiami prikusa.

Analysis of x-ray parameters of the facial skull in 102 children and adolescents directed for orthodontic treatment because of occlusion abnormalities showed that the changes in the dentition ratio are caused by disorders in the growth and formation of facial bones and skull base. X-ray characteristics of different types of such disorders are presented.

[The x-ray anatomical indices of the pterygopalatine fossa in patients with congenital jaw deformities]. / Rentgenoanatomicheskie pokazateli krylonebnoi iamki u bol'nykh s vrozhdennymi deformatsiiami cheliustei.

The anthropometric and anatomical features of the pterygopalatine fossa were studied in 63 skulls of subjects belonging to 3 age groups, 60 roentgenograms of subjects without deformations of the facial skull were analyzed for the same purpose, and 50 patients with various deformations of the facial and cerebral skull were examined. The authors have detected a relationship between the length and width of the pterygopalatine fossa and the size of the posterior facial height, which fact should be born in mind to prevent the complications of bone reconstructive surgery in the middle zone of the facial skull.

[Characteristics of maxillary sinuses imaging on various orthopantomograms (Experimental study)]. / Ob osobennostiakh izobrazheniia verkhnecheliustnykh pazukh na ortopantomogrammakh raznogo tipa (Eksperimentalnoe issledovanie).

Presents the results of experimental study of image distortions emerging in various methods of obtaining panoramic sonograms of the maxillary sinuses. Direct panoramic sonograms obtained with the OP-6 Sonarc orthopantomographer were found to give the most objective sizes of the intracavitary formations and their sites. The bottom of the orbit is detectable only on such sonograms. Inaccurate positioning of the head involve image distortions.