[A modified technique for expanding the attached keratinized gingiva zone using a free gingival graft "Danilov`s medallions"]. / Modifitsirovannaya metodika rasshireniya zony prikreplennoi keratinizirovannoi desny s pomoshch'yu svobodnogo desnevogo transplantata «medal'ony po Danilovu¼.

On a clinical example a modified technique for increasing the width of the attached keratinized gingiva zone is presented by taking medallions of a free gingival graft 1.5-2 mm thick from the hard palate using 5 mm mucotomes and transplanting them into the gum defect zones with a simultaneous vestibular deepening in the lateral regions of the jaws. This technology has been tested over a 5-year period with long-term clinical results.

[Sublingual artery injury during dental implantation using a surgical navigation guide]. / Povrezhdenie pod"yazychnoi arterii pri dental'noi implantatsii s primeneniem khirurgicheskogo navigatsionnogo shablona.

The article presents a clinical case of hemorrhage due to sublingual artery injury during the installation of four dental implants in the lower jaw using a surgical navigation guide. In a detailed analysis of the case and the surgery, the main cause of this complication was determined. It must be taken into account while planning a surgery on edentulous jaws or with the single-stage full dental extraction on the lower jaw. Ensuring strict guide immobility is essential for correct drilling, wherefore it is necessary to make a fixing key in the occluder or articulator.

[A classification of surgical guides application for dental implantation]. / Klassifikatsiya variantov primeneniya khirurgicheskikh napravlyayushchikh shablonov dlya dental'noi implantatsii.

In dental implantology the treatment planning is the most important item for surgery success as well as for functionality and aesthetics of denture. The current problem is to determine the implant position intraoperatively. On dental market there are many companies offering the different variants of navigation surgery, including surgical guides. The purpose of this study is to create universal classification of surgical guide application for dental implantation based on clinical setting and the individual anatomy of the patient which simplifies the medical activities and predictably performs the treatment protocol.

[The alveolar antral artery prevalence and topography according to literature review]. / Analiz vstrechaemosti i topograficheskikh dannykh al'veolo-antral'noi arterii na osnove obzora literatury.

INTRODUCTION: The lack of the available bone in the posterior maxilla is determined by the range of anatomical and topographical factors. Lateral sinus floor elevation is the procedure for vertical augmentation in this region. Several complications may occur while performing a lateral sinus lift and bleeding due to alveolar antral artery (AAA) damage is one of them.The aim of the study is to analysis the different literature on AAA topographical features on cadaver species and on radiographic methods. MATERIALS AND METHODS: A search of the English language literature was performed by three independent readers in the PubMed electronic database. Articles published between 2013 and 2018 on cadaver and radiographic studies were included. RESULTS: The analysis included 9 articles. AAA prevalence in cadavers was 100% but AAA bone signs in CBCT studies varied between 32% and 93%. The diameter varied from 0.91 mm to 3.6 mm, and the distances from AAA to the sinus floor and to the alveolar ridge crest were 7.38-9.97 and 14.6-18.66 mm respectively. CONCLUSION: Our literature analysis showed the difference between AAA prevalence in cadavers and in CBCT scans. The results show that even proper pre-operative planning of the lateral sinus lift with CBCT cannot guarantee avoiding AAA damage while performing the surgery.

[Morphology of mandibular lingual concavities]. / Morfologiia podnutrenii nizhnei cheliusti s iazychnoi storony.

AIM: The literature review on assessment of lingual concavities in posterior mandibula with CBCT to prevent complications such as perforations during dental implant placement. METHODS: The electronic search of full-text articles on lingual concavity studies with CBCT was performed. The data on the prevalence, depth and angle of concavities was analyzed. RESULTS: The analysis included 5 articles from 2011 to 2016 years. Totally 1713 mandibular concavities were evaluated in 1232 patients. The prevalence was 46.7-68%; mean depth was from 2.4 mm to 5.4 mm; and the mean angle varied from 143 to 156.6 degrees. CONCLUSION: Though morphologic data of lingual concavities showed similar pattern it is necessary to provide CBCT evaluation prior to dental implant placement to define available bone and its morphology. It is recommended to use guided surgery if U-type is evident.