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Found 6 items.
ОЛИБ ҚЎЙИЛАДИГАН ПРОТЕЗЛАР ТАЙЁРЛАШДА ЗАМОНАВИЙ МАТЕРИАЛЛАРНИНГ АФЗАЛЛИКЛАРИ
Ортопедиянинг энг қийин йўналишларидан бири оғиз бӯшлиғида маҳкамлаш учун махсус шартларни талаб қиладиган олинадиган протезлар билан протезлашдир. Қисман олинадиган протезлар қолган таянч тишларга бириктирилиши мумкин, тӯлиқ олинадиган протезлар эса муқобил усулларни излашни талаб қилади. Маълумки, аҳолининг ортопедик даволанишга бӯлган эҳтиёжи камаймайди ва ҳатто ӯсиш тендентсиясига эга. Ўзбекистон аҳолисининг 70 фоизида 20-50 ёшда қисман ёки тўлиқ иккиламчи адентия бор. Қисман ва тӯлиқ олинадиган протезлар билан протезлаш керак бӯлган одамларнинг фоизи сезиларли даражада ошди ва ёшариш тендентсиясига эга. Кӯпгина тадқиқотларни таҳлил қилиш беморларнинг 30-40 фоизида протезлаш учун ноқулай шароитларни аниқлади. Қайта тайёрланган олинадиган протезлардан фойдаланишнинг мумкин эмаслиги текширилган беморларнинг 20 фоизида кузатилган, бу ортопедик даволаш учун сифатсиз дастлабки тайёргарлик билан боғлиқ [4,6,19]. Стоматологик ва соматик ҳолатнинг индивидуал хусусиятларини ва бемор оғиз бӯшлиғининг микроекологиясини ҳисобга олган ҳолда, олинадиган протез тайёрлаш учун конструктион материални танлашга ўзига хос ёндашув зарурлиги э'тироф этилади [9]. Бу протез материалларнинг протез майдони шиллиқ қаватига ва умуман беморнинг танасига салбий та'сир қилиш хавфи билан боғлиқ [2,21]. Шунинг учун протез материалини танлаш нафақат унинг физик-кимёвий хусусиятларига, балки оғиз бӯшлиғининг атрофдаги тӯқималарига биологик таъсирига қараб ҳам амалга оширилади [30]. Ортопедик стоматологияда энг кенг тарқалган олинадиган протезлар учун материал акрил пластмассадир. Бироқ, у оғиз бӯшлиғи шиллиқ қаватининг яллиғланиши сифатида намоён бӯладиган аллергик реакцияларни келтириб чиқариши мумкин [23]. Акрилатга аллергия ривожланишининг асосий этиологик омили пластмассадаги 0,2% миқдорида бӯлган қолдиқ мономердир [26], агар полимеризatsiя режими бузилган бӯлса, у 8% гача кӯтарилади [8,12]. Стоматологияда ортопедик даволаш учун ишлатиладиган пластмассалар юқори полимерли органик бирикмалардир [1]. Улар оқсил хусусиятига эга эмас ва шунинг учун ӯз-ӯзидан аллергия келтириб чиқара олмайди [15]. Мономер, метакрил кислота эфири паст молекуляр бирикма, я'ни потентсиал гаптен бӯлиб, тана тӯқималари оқсиллари билан бирлашганда антигенга айланади [24,25]. Унинг оғиз бӯшлиғи шиллиқ қавати ҳужайраларига, шу жумладан семиз ва базофил ҳужайраларига тӯғридан-тӯғри токсик та'сири гистаминнинг носпетсифик ажралишига олиб келади, Бу аллергик реактсияни ӯзгартиришга қодир бӯлган аллергенларга та'сир қилади ва шу билан аллергик контакт дерматит феноменини келтириб чиқаради [5,28]. Мономер сўлакдаги лизотсим титрини камайтириши аниқланган [3,16]. Протезлардан ювилган қолдиқ мономер, ҳатто оз миқдорда бӯлса ҳам, оғиз нейтрофилларининг функционал ҳолатига та'сир қилади ва уларнинг активлигини пасайтиради [14]. Бир қатор муаллифларнинг фикрига кӯра, мономер протоплазматик заҳар бӯлиб, тӯқималар билан алоқа қилганда жуда фаол ва бутун организмга токсик та'сир кӯрсатишга қодир [18,29]. Акрил пластмасса протезларнинг муҳим камчиликлари полимеризатсия пайтида юзага келадиган қисқариш туфайли технологик сабабларга кӯра муқаррар равишда юзага келадиган протез асосларининг микропоралилигидир [14]. Учинчи камчилик - бу акрил пластмассаларнинг чайнаш пайтида юкламага нисбатан паст мустаҳкамлигидир [7].
Chief Editor, Омонова Н.А.
84-89
2023-12-20
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COMPARATIVE EVALUATION OF NEW OSTEOPLASTIC RAW MATERIALS BASED ON THE RESULTS OF ACUTE VENOM RESEARCH
Comparative assessment of the degree of harmful effects on experimental animals of the new osteoplastic material 47.5B and domestic bioactive glass BG-1D and assessment of its safety for use as an osteoplastic material. Material and methods: Three series of experiments were earned out and lethal doses were determined for the intraperitoneal and intragastric routes of administration of the drug to laboratory animals. Results: LD50 47.5B was 4274.51:4770.58 mg/kg when administered intragastrically and 2358.31:2895.65 mg/kg when administered intraperitoneally to rats. In animals that received bioactive glass BG-1D, this indicator changed slightly, amounting to 3439.04:3810.53 and 1732.77:2730.93 mg/kg, respectively. Conclusions: These materials can be attributed to practically non-toxic substances (according to the results of intraperitoneal administration of a suspension of substances to rats and mice) and to low-toxic substances (according to the results of intragastric M administration of a suspension of substances to rats).
A Akbarov, N Ziyadullaeva, A Raxmanov, M Axmedov
8-10
2021-03-26
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TECHNICAL TECHNIQUES FOR DETERMINATION OF TEETH COLOR IN ORTHOPEDIC DENTAL CLINIC
One of the components of the successful result of the future restoration is the determination of the color of the teeth. When determining the color of the teeth, it is necessary to take into account not only the objective factors that affect the selection of the tooth shade, but also the subjective color perception of the dentist or dental technician. Such procedures should be separated into a separate stage, observing all the production and psychological subtleties and nuances. The article describes the mechanisms for determining and recreating the color of teeth, understanding the nature of color, and the influence of light and other factors on the choice of color and visual perception of the finished orthopedic structure.
N Ziyadullaeva, N Xojimurodova, F Muxitdinova
72-76
2021-03-26
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HEMATOLOGICAL INDICATORS OF EXPERIMENTAL STUDY OF CHRONIC TOXICITY OF DOMESTIC PASTE-LIKE COMPOSITE
The emergence of osteoplastic materials and new methods of bone regeneration not only solve the problem of the volume and density of the jaw bones, but also significantly improve the results of implantation. The ami of the research is search and development of new domestic osteoplastic materials remains relevant. The results of acute toxicity detection allow us to classify the domestic pasty composite material as a group of practically non-toxic materials according to the International classification of material toxicity.
B Khabilov, A Akbarov, N Ziyadullaeva
10-12
2020-04-26
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CHILDREN IN THE Aral Sea Region AND INCREASING THE DENTAL CULTURE OF ADULTS
As a result of a preliminary study in the pre-Aral region, this region was selected as the data on dental health, an object for studying the dental status in children of the general somatic state of the child population. Since scientific studies on a comprehensive hygienic assessment of the oral cavity of the mipact of an unfavorable ecology on the environment and the health of the population of a given region have not been sufficiently studied. which determined the relevance of the planned studies. In addition to the above. In addition to the above, territorial features of the environment, such as social conditions, urbanization, features of industrial specialization, trends in the social structure of society, enamel caries, and the physical devel-opment of children are important. In addition, the territorial features of the environment. such as social conditions, urbanization, features of industrial specialization, trends in the social composition of the society, medical and demographic indicators, mcidence, disability, physical development of children and adolescents, are important.
M Dadabaeva, N Ziyadullaeva, M Mirxoshimova, S Abdullaev
15-19
2020-04-26
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CLINICAL-FUNCTIONAL CHANGES AFTER DENTAL IMPLANTATION IN PROPERTY TISSUES AND METHODS OF CORRECTION
With the developing implantology. patients increasingly refuse to use removable dentures, preferring fixed dentures with the miplants support. Slowing down of postoperative tissue healing or developing of complications delays and complicates subsequent prosthetic treatment. Based on the analysis of literature data, it can be argued that the pathogenesis of early and late complications after dental implantation is a violation of hemodynamics in the tissues surrounding the implant. In this regard, in recent years, much attention has been paid to physical factors that have anti-inflammatory’, antibacterial, regenerative and immunomodulatory effects.
N Ziyadullaeva, U Kobiljonov, B Boltaboev
50-56
2020-04-26
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1 - 6 of 6 items
“Stomatologiya” is a dental journal of the Republic of Uzbekistan, which has been published since 1998 and is the press organ of the Association of Dentists of Uzbekistan.
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