[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.

[Planning and performing surgical stage of dental implantation in difficult clinical cases based on computer modeling].

Clinical experience of preoperative computer modeling of dental implant intervention is described. By studying the ergonomics and the accuracy a proper stereolithography guide is selected. This method allows performing a complex preoperative virtual study of dental implants placement depending on future prosthodontics restoration in difficult clinical cases. Requires collaboration at the planning stage of prosthodontist, surgeon, radiologist, 3D-modeling specialists.

[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.

[Spiral computer tomography use on the treatment stages of patients with defects and deformations of face bones and soft tissues].

There are discussed possibilities of spiral computer tomography use in cases of defects and deformations of face bones and soft tissues elimination.

[X-ray manifestations of maxillary cavitary masses].

The paper deals with the X-ray manifestations of different maxillary pathological processes accompanied by the cavitary symptom. Analysis of X-ray films of different types in 250 patients has indicated that the nature of cavitary mass can be determined in many cases.

[Clinical and X-ray assessment of different modes for correcting orbital bottom defects in posttraumatic deformities of the middle one-third of the facial skeleton].

The paper describes the evolution and consequences of different modes of eliminating orbital bottom defects and deformities that develop in posttraumatic deformities due to bone fractures of the facial mid-skeleton. Spiral computed tomography of this portion of the facial skeleton has demonstrated that the optimum results of restoration of the orbital bottom and those of elimination of eyeball displacement give the use of osteoplasty with a split parietal bone graft.

[Procedure for spiral computed tomography in the diagnosis of tooth impaction].

The paper presents a procedure for spiral computed tomography that may be used if there are some difficulties in the diagnosis of impaction of different teeth. Examples art used to show the capacities of specified diagnosis in solving the problems and difficulties in surgical or orthodontic treatment.

[Some topical problems in the use of spiral computed tomography in the treatment of patients with posttraumatic deformities of the middle and upper third of the facial skull].

The paper presents a procedure for examining patients with posttraumatic deformities of the middle and upper third of the facial skull on a spiral computed tomograph and the schemes for estimating the size of enophthalmos, which permit elimination of eyeball recession.

[Efficacy of use of X-ray contrast carbon material in maxillo-facial surgery].

The possibilities of the use of carbon implants in cases of any defects of any part of facial skeleton and soft tissues of both inherent and acquired nature were studied. Taking into account X-ray transparency of carbon implants the experiment was carried out to make the material X-ray contrast when using the addition of powdered metallic boron in the range of concentrations 8-12%. It was successful and the samples were visualized. In these cases spiral computed tomography is the optimal tool to make all deformation volume clear, to plan operative interventions and to observe the treatment results.

[Role of spiral computed tomography in the diagnosis of complications due to endodontic treatment].

The paper deals with the diagnosis of some errors in endodontic treatment by spiral computed tomography.

[Procedure for visualization of carbonic materials in maxillofacial surgery by spiral computed tomography]. / Metodika vizualizatsii uglerodnykh materialov v cheliustno-litsevoi kirurgii s pomoshch'iu spiral'noi komp'iuternoi tomografii.

The paper considers whether carbonic materials whose contrasting is achieved when they contain 8-12% of metallic boron power may be applied to restore bone defects of the facial skull. Implants of this composition were employed to operate on 4 patients with different defects of the facial skull. A three-projection of SCT image obtained in the "SOFT" mode was used as a way of registration. The results of the studies have indicated that the materials under study have X-ray contrast, a complete biological compatibility, and non-toxicity when they are used in clinical practice.

[Simultaneous repair of the zygomatico-naso-orbital complex by free bone and cartilage autotransplants]. / Odnomomentnaia rekonstruktsiia skulonosoglaznichnogo kompkeksa s ispol'zovaniem svobodnykh kostnykh i khriashchevykh autotransplantatov.

A method for simultaneous surgical treatment of various types of injuries of bone and soft-tissue structures of the zygomatico-naso-orbital area is presented. Special attention is paid to repair of posttraumatic eno- and hypophthalmos. A total of 42 patients were operated on by the proposed methods at Central Institute of Dentistry in 1998-2002. The injuries were diagnosed using computer-aided tomography of the facial skeleton. Bone tissue defects were repaired by free bone autotransplants of the parietal bone, ileac bone crest, tibial bone, autotransplants of the rib and auricular cartilage. Coronary, oral, subciliary accesses are recommended; endonasal access can be used if necessary. The complex approach presented in this report is recommended for repair of posttraumatic deformations and defects and for the treatment of fresh injuries of this location.

[X-ray study of patients at the stage of preparation for prosthesis by using dental maxillary implants]. / Rentgenologicheskoe issledovanie bol'hykh na étape podgotovki k protezirovaniiu s ispol'zovaniem dental'nykh implantatov na verkhnei cheliusti.

The paper deals with the possibilities of using the data of X-ray studies--computed tomography and orthopantomography--in planning the surgical stage of implantation for preprosthetic correction of the upper denture. Examination of 23 patients has yielded the data showing what estimation of the size of an image obtained by the "Denta Scan" programme provides.

[Computed tomography in the diagnosis of periodontal changes]. / Komp'iuternaia tomografiia v diagnostike kostnykh izmenenii parodonta.

The paper shows how volumetric reconstruction of jaw images can be used and analyzes the plots of planar characteristics of cortical plates in different forms of periodontitis. Clinical and X-ray parallels in this disease are discussed.