Endoscopic approach to chronic maxillary sinusitis of dental origin is a new, reliable method associated with less morbidity and lower incidence of complications.

This article is dedicated to Professor P.P. Lvov, the founder of maxillofacial surgery and dentistry in this country, and his students. Professor P.P. Lvov is a graduate of the medical faculty of Imperial Tomsk University as well as the surgical school of R.R. Vreden and F.I. Zverzhkhovsky. He is also the founder of his own scientific school along with Professors A.A. Limberg, S.F. Kosykh, L.R. Balon, V.M. Uvarov, V.N. Kartashev, N.M. Stepanov, and A.I. Ediberidze. He has authored several fundamental pieces of work on bone grafting for mandibular defects, odontogenic osteomyelitis of the jaws, ankyloses of the temporomandibular joint, and surgical treatment of congenital clefts of the palate. Additionally, he is also the Head of the Department of Dentistry at the First Leningrad Medical Institute (19231946), an honorable doctor of the RSFSR and, along with Prof. A.A. Limberg, the author of the first Russian Textbook of Surgical Dentistry (1938) which is very popular among students and doctors.

The aim of the study is to determine indications for the use of sialoendoscopy in the diagnosis and treatment of sialolithiasis. Materials and Methods. The study involved 115 patients with sialolithiasis, who underwent cone beam computed tomography, ultrasound diagnosis of the salivary glands, and sialoendoscopy, in addition to the standard general clinical examination.Results. Sialoendoscopy makes it possible to detect a stone, determine its shape, relative size, mobility, and assess the condition of the salivary ducts. It is impossible to obtain this information by other methods, though it is very important for treatment decision making. The design of the sialoscope and its special instruments make it possible to proceed with sialolith extraction immediately after detecting it. Conclusion.The absolute indication for the use of sialoendoscopy is mobile calculi less than 5 mm in diameter (L1 according to F. Marchal's LSD classification). In case of immobile sialoliths less than 4-8 mm in size, located in the main duct (L2), endoscopy should be used as a method supplementary to ductotomy. When sialoliths are located in the distal parts behind the areas of bending or stricture (L3a and L3b), the use of endoscopy is not indicated.

The aim of the study was the assessment of effectiveness of endoscopic techniques in the treatment of extensive odontogenic cysts. Endosurgery for diagnostic and therapeutic purposes was used in 67 patients with odontogenic cysts of the jaws: 23 follicular cysts, 19 radicular cysts, 6 residual cysts, and 19 keratokists. The results prove that the developed methods of endovideosurgery of odontogenic cysts have low invasiveness, provide an optimal healing of bone tissue and reduce postoperative complications.

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