Academic literature on the topic 'Gutka'
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Journal articles on the topic "Gutka"
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Chaturvedi, P. "Gutka consumption." British Dental Journal 206, no. 8 (April 2009): 397. http://dx.doi.org/10.1038/sj.bdj.2009.316.
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Dhumal, Gauri G., and Prakash C. Gupta. "Assessment of Gutka Ban in Maharashtra: Findings from a Focus Group Discussion." International Journal of Head and Neck Surgery 4, no. 3 (2013): 115–18. http://dx.doi.org/10.5005/jp-journals-10001-1156.
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ABSTRACT According to Global Adult Tobacco Survey (GATS) India 2009-2010, around 8.3% (13.4% among male and 2.5% among female) of people in Maharashtra are gutka users. Gutka consumption not only causes oral cancer, but has also been link ed with develop men t of oral su bmuco us fibrosis, a precancerous lesion. Considering its harmful effects, gutka and pan masala were banned by Maharashtra Government from July 19, 2012 disallowing their sale, manufacture, distribution and storage. Though the ban has come into enforcement, the evidence stating the extent of its implementation is sparse. The objectives of the study were to learn about perception of gutka ban, impact of the ban on gutka consumption, changes in the trend of tobacco related products consumption, availability of gutka to the public on demand and economic effects of the ban on users. A Focus Group Discussion was conducted among current and ex-gutka users on January 24, 2013 at Healis Sekhsaria Institute for Public Health, Navi Mumbai, India. A total of 11 male, ex-gutka users from different professions, participated in the discussion. The FGD lasted for 40 to 45 minutes. The verbal consent for participation in the FGD was taken from the respondents. The findings showed that with enforcement of the ban, 3 out of 11 respondents completely stopped consumption of gutka or any other tobacco product, whereas the rests switched to other tobacco products. All the respondents were aware about gutka ban and agreed that its a good step to reduce its consumption; however, most of them felt that the ban has not been implemented properly. According to them, the vendors still manage to sell gutka to their known regular customers. Since the ban has helped in compelling most of the users to quit gutka, it clearly implies that enforcement of ban with proper implementation is required to diminish gutka consumption among people. How to cite this article Dhumal GG, Gupta PC. Assessment of Gutka Ban in Maharashtra: Findings from a Focus Group Discussion. Int J Head Neck Surg 2013;4(3):115-118.
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Adhikari, Keyuri, Mangesh S. Pednekar, Irina Stepanov, Arjun Singh, Sampada Nikam, Hitesh Singhavi, Vikram Gota, et al. "Observed Circumvention of the Gutka Smokeless Tobacco Ban in Mumbai, India." Tobacco Regulatory Science 6, no. 5 (September 1, 2020): 331–35. http://dx.doi.org/10.18001/trs.6.5.3.
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Objectives: Gutka is industrially manufactured in India and some Indian states have instituted bans on the sale of manufactured gutka as a public health initiative. We explored whether gutka was still available for purchase after the ban and also sought to observe methods of ban circumvention. Methods: We visited 5 different markets at different locations separated by at least 15-20 km around the Mumbai Metropolitan Region (MMR) area, consisting of Mumbai and its satellite towns in Maharashtra, India during August- September, 2019. In each location, purveyors were queried as to the availability of gutka. Results: Tobacco purchases were made in 5 locations/sections of MMR. At all markets, banned gutka was not displayed, and could only be purchased after requesting from the shopkeeper. Three methods of ban circumvention were observed: (1) packages marked 'export only'; (2) use of twin packaging in which pan masala and tobacco are sold together for immediate mixing to create gutka; and, (3) non-descript packaging without mention of 'gutka'. Conclusions: Although not readily displayed in shops, gutka is readily available in MMR, despite a statewide ban in Maharashtra. Marketers have used multiple methods to circumvent the statewide gutka ban.
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Anwar, Shahid, Sonia A. Williams, Jennifer Scott-Smith, Helen Sage, Sohrab Baweja, Manu Singal, and Naresh K. Sharma. "A Comparison of Attitudes and Practices of Gutka Users and Non-users in Chitrakoot, India. A Pilot." Primary Dental Care os12, no. 1 (January 2005): 5–10. http://dx.doi.org/10.1308/1355761052894176.
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Aims and objectives As part of a student elective, this pilot study aimed at investigating attitudes and practices concerning gutka use in a town in India. It was hoped that information gained would assist in formulating an appropriate health education programme to encourage gutka cessation locally and would provide more information about a habit which is also relevant to some UK South Asian populations. Design and setting 124 consecutively attending subjects (103 males and 21 females) at a charity-run dental clinic in Chitrakoot, India, were interviewed using a semi-structured questionnaire. Main findings 57 (46%) of the respondents, of whom there were more males than females (103 v. 21), reported current gutka use. There were no differences between users and non-users by age or educational attainment. Users found gutka ‘helpful’ in relieving tension, aiding concentration, combating bad breath and as a leisure activity. They all cited other family members who were using gutka as compared to only 40% of the gutka non-users. Cancer was mentioned as a harmful outcome of gutka use more frequently by non-users. Of the 57 gutka chewers, 36 also chewed paan with tobacco and 20 smoked cigarettes. Conclusions Gutka chewing involved almost half of the study population and proportionately more males than females. The habit was endemic within families. Many gutka chewers also smoked, chewed paan or drank alcohol, representing a high-risk behaviour for oral cancer. Proportionately more non-chewers were aware of the link with cancer. There are clear implications for health promotion in India. General dental practitioners in the UK should also be aware of the possibility that this habit is becoming more widely adopted in South Asian communities here, involving young children as well as adults. Research into gutka use is also required in the UK.
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Jaganmohan, P., and A. Phaninanatha Sarma. "Studies on changes in hematological and biochemical parameters in smokeless tobacco (Gutka) chewing auto drivers in Nellore district of Andhra Pradesh, India." Journal of Applied and Natural Science 3, no. 1 (June 1, 2011): 106–7. http://dx.doi.org/10.31018/jans.v3i1.165.
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The present study was designed to evaluate the effect of Smokeless tobacco on some biochemical and haematological parameters. It was observed that hematological parameters of Autodrivers including hemoglobin content, white blood cell and leukocyte counts were higher in Gutka consumers than in controls, where as monocytes and basophils counts were lower. Higher biochemical parameters like serum cholesterol, glucose and protein were observed in blood samples of Gutka consumers. Decrease in serum protein levels and remarkable increase in Serum cholesterol and glucose levels were observed in Gutka consumers when compared to controls. There existed considerable difference among different hematological and biochemical parameters of gutka chewers when compared to controls.
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Priyambada, Pandey, and Goyal Anju. "QUANTITATIVE ESTIMATION OF MAGNESIUM CARBONATE IN PAN MASALA AND GUTKA." International Journal of Current Pharmaceutical Research 10, no. 5 (September 15, 2018): 32. http://dx.doi.org/10.22159/ijcpr.2018v10i5.29691.
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Objective: The objective of present study is to detect and quantitatively estimate Magnesium Carbonate, a potential carcinogen used for its anti-caking property in various brands of Pan Masala and Gutka by the simple, economic and effective method.Methods: The water-soluble extract of various brands of Pan Masala and Gutka was prepared by a wrist action rotary shaker for 60 min. The extract was filtered, and the filtrate was titrated against 0.1N EDTA using Eriochrome Black T indicator at pH 10 and using Murexide indicator at pH 12.Results: The presence of Magnesium Carbonate was found to be less than 2% in all brands of Pan Masala and less than 3% in all brands of Gutka samples used in the analysis.Conclusion: There is Magnesium Carbonate used in all brands of Pan Masala and Gutka used in the present study.
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Nayak, Ajay G., Yogesh Chhaparwal, and Keerthilatha M. Pai. "The hazards of gutka chewing." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 110, no. 5 (November 2010): 548. http://dx.doi.org/10.1016/j.tripleo.2010.05.076.
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Javed, Fawad. "The hazards of gutka chewing." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 110, no. 5 (November 2010): 548–49. http://dx.doi.org/10.1016/j.tripleo.2010.06.016.
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Awan, Kamran Habib, QA Hussain, and Mahesh Maralingannavar. "Assessing the Risk of Oral Cancer associated with Gutka and Other Smokeless Tobacco Products: A Case–control Study." Journal of Contemporary Dental Practice 17, no. 9 (2016): 740–44. http://dx.doi.org/10.5005/jp-journals-10024-1922.
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ABSTRACT Introduction Tobacco and tobacco-related products have been attributed to be causative factors for oral cancer. Newer, chewable, and commercially available smokeless tobacco (ST) products, such as gutka pose further threat in this direction. The aim of the study was to evaluate the risk of oral cancer associated with gutka and other ST products. Materials and methods A case-control study of 134 cases and 134 controls, over a period of 6 months (July–December 2014), was carried out at the Baqai University, Karachi, Pakistan. An interview-based questionnaire was used to collect data on sociodemographic characteristics, oral hygiene practices and type, duration, and frequency of use of tobacco-related products. Data were analyzed using the Pearson's chi-square (χ2) test with the level of significance set as p < 0.05. Results Gutka showed the highest odds ratio toward developing oral cancer ratio among all the tobacco-related products [odds ratio (OR) 5.54; 95% CI 2.83–10.83; p < 0.001)]. Participants who consumed other ST products also showed 2 to 4 times higher odds ratio of developing oral cancer than compared to those who did not consume these products. Conclusion The study provided strong evidence that gutka and other ST products are independent risk factors for oral cancer. Clinical significance This study highlights the strong association of different types of ST and oral cancer. This results in identification of high-risk groups for targeted screening for potential oral cancer lesions. How to cite this article Awan KH, Hussain QA, Patil S, Maralingannavar M. Assessing the Risk of Oral Cancer associated with Gutka and Other Smokeless Tobacco Products: A Case-control Study. J Contemp Dent Pract 2016;17(9): 740-744.
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Rehan, Faisal, Najam Us Sahar, Rabia Sannam Khan, Mohammed Sohail Memon, Naureen Minhaj, and Syed Hasan Shaharyar. "Habitual risk factors in gutka chewers." International Dental & Medical Journal of Advanced Research - VOLUME 2015 3, no. 1 (2017): 1–5. http://dx.doi.org/10.15713/ins.idmjar.67.
Full textDissertations / Theses on the topic "Gutka"
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Cavazos, Nina. "The Art of Devotion: Style, Culture, and Practice in Mid-Nineteenth-Century Kashmir." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/4878.
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This thesis critically examined gutkas – illuminated, pocket-sized anthologies of texts, hymns, and prayers that a Hindu would recite in a sacred place in the home, usually near an altar – produced in the Kashmir Valley during the mid-nineteenth century. Previously relegated to the periphery of scholarly discourse due to academic discriminations against “folk” culture, the goal here was to consider these objects and their paintings through the combined lenses of art history, cultural history, and religious studies in order to speak about gutkas in a deeper and more meaningful way. Here, gutkas from Utah State University, the Smithsonian Freer|Sackler Galleries, and the British Library were used as a tool to situate their makers within intricate familial webs of artistic practice, identify patterns of consumption and attitudes of ownership among a South Asian middle class, and reconstruct the objects’ function within Hindu devotional practice.
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Belladonna, Felipe Gonçalves. "Biocompatibilidade de um material a base de guta-percha autoadesiva (Bio-Gutta)." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=6658.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorO objetivo desse trabalho foi avaliar a biocompatibilidade de um material a base de guta-percha autoadesiva (Bio-Gutta) em tecido subcutâneo de camundongos. A guta-percha convencional foi utilizada como referência para comparação. Para isso, foram utilizados 30 camundongos, os quais foram distribuídos aleatoriamente em dois grupos (Bio-Gutta e guta-percha convencional). Os materiais avaliados foram implantados na região dorsal dos camundongos. Após 7, 21 e 63 dias, os animais foram sacrificados e 5 amostras por grupo por tempo experimental foram obtidas. As amostras histológicas foram seccionadas em 5 m de espessura e coradas convencionalmente com hematoxilina e eosina. Um escore de I-IV foi utilizado para graduar a reação inflamatória. O teste U de Mann-Whitney com correção de Bonferroni foi utilizado para análise estatística (p < 0,05). Os resultados mostraram que, após 7 dias, a Bio-Gutta induziu uma reação tecidual de leve a moderada (II) e a guta-percha convencional apresentou uma resposta inflamatória de moderada a intensa (III). Após 21 dias, a Bio-Gutta induziu uma leve reação tecidual (I), enquanto que a guta-percha convencional ainda apresentava uma resposta inflamatória moderada (III). Uma reação tecidual de leve a ausente (I) foi observada na Bio-Gutta após 63 dias, ao passo que na guta-percha convencional observou-se uma resposta inflamatória de leve a moderada (II). Houve diferença significativa na mediana do grau de inflamação entre os grupos em cada tempo experimental (p = 0,005, aos 7 dias; p = 0,011, aos 21 dias; e p = 0,003, aos 63 dias). Concluiu-se então que a Bio-Gutta foi mais biocompatível que a guta-percha convencional em tecido subcutâneo de camundongos apresentando uma boa resposta tecidual.
The purpose of this study was to evaluate the biocompatibility of a self-adhesive gutta-percha material (Bio-Gutta) in connective tissue of mice. Conventional gutta-percha was used as reference for comparison. Thirty mice were used in this study and they were randomly assigned into two groups (Bio-Gutta and conventional gutta-percha). The tested materials were implanted in the dorsal region of mice. After 7, 21 and 63 days, animals were sacrificed and 5 samples per group per time-point were obtained. Histologic samples were sectioned in 5 m thickness and stained with conventional hematoxylin and eosin. A grade from I-IV was used to graduate the inflammatory reaction. Bonferroni-corrected Mann-Whitney U test was used for statistical analysis (p < 0,05). The results showed that after 7 days Bio-Gutta induced a slight to moderate tissue reaction (II) and conventional gutta-percha presented a moderate to intense inflammatory response (III). After 21 days, Bio-Gutta presented a slight tissue reaction (I), while conventional gutta-percha still showed a moderate inflammatory response (III). A slight to absent tissue reaction (I) was observed in Bio-Gutta after 63 days, whereas conventional gutta-percha showed a slight to moderate inflammatory response (II). There was a significant difference in the median degree of inflammation between the groups at each time-point (p = 0,005, at 7 days; p = 0,011, at 21 days; and p = 0,003, at 63 days). It was concluded that Bio-Gutta was more biocompatible than conventional gutta-percha in subcutaneous tissue of mice showing a good tissue response.
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Nicastro, Karine Schell de Moraes. "Adaptação e selamento apical da obturação com cones de guta-percha de diferentes conicidades após duas técnicas de instrumentação." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289336.
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Orientadores: José Flávio Affonso de Almeida, Caio Cezar Randi FerrazDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O objetivo desse estudo foi avaliar o preenchimento e selamento apical da obturação com cones de guta-percha de diferentes conicidades, após o preparo químico-mecânico com batente apical e preparo cônico contínuo. Foram utilizadas 90 raízes mesiais de molares inferiores com dois canais e forames distintos. As raízes foram divididas em seis grupos de acordo com o preparo apical: Grupos 1, 2 e 3 - preparo com batente apical e nos Grupos 4, 5 e 6 - preparo cônico contínuo. Todos os grupos foram instrumentados com o sistema rotatório K3. A obturação foi feita com a Técnica Onda Contínua de Condensação, utilizando três tipos de cones de guta-percha não estandartizados: Fine, Fine-Medium e Medium. Analisou-se a micro infiltração apical, através da Filtração de Fluidos, em apenas um dos canais da raiz mesial utilizando o Flodec. Verificou-se o preenchimento dos cones de guta-percha no interior do canal à 1,5, 2,5 e 3,5 mm do forame apical, utilizando a lupa estereoscópica com aumento de 20x. Foram comparados em cada corte a área de guta-percha obturada em relação à área instrumentada; à área total do canal radicular e à área de falhas presentes nas obturações. Para microinfiltração apical não houve diferença estatística entre os grupos testados. Quando analisada a área ocupada pela guta-percha em relação à área instrumentada, à área total e à área de falhas entre os diferentes cortes (1,5, 2,5 e 3,5) no mesmo grupo em ambos os preparos não houve diferença estatística. Em contraposição quando foi considerado à área instrumentada, no grupo 5 houve diferença estatística comparando os cortes 1,5 e 2,5mm. Para área total, no grupo 2, obteve-se diferença nos cortes a 1,5 e 2,5mm. Quando se considerou o mesmo corte (1,5, 2,5 e 3,5) para os diferentes grupos, particularmente para área instrumentada, o Grupo 5 apresentou melhores resultados que o Grupo 4 no corte à 1,5mm. Para a área total, nível de corte 1,5mm, o Grupo 5 apresentou melhor adaptação da guta-percha do que o Grupo 6. Os cones de diferentes conicidades demonstraram adaptações semelhantes tanto no preparo com batente apical tanto no preparo cônico contínuo. A presença ou ausência do batente apical, a conicidade e adaptação dos cones de guta-percha e o diâmetro do forame apical não influenciaram o selamento apical da obturação
Abstract: The aim of this study was to evaluate the adaptation and apical sealing of the root canal filling with gutta-percha using different tapers with an apical stop or continuous preparation technique. Ninety mesial roots of mandibular molars with two canals ending in distinct forame were used. The roots were divided into six groups according to instrumentation technique: Groups 1, 2 and 3 - using apical stop; and groups 4, 5 and 6 - performed with the Continuous Preparation. Root canal preparation was performed with K3 rotary file system. The continuous wave technique of condensation was used for root canal filling, using three different tapered gutta-percha: Fine, Fine-Medium and Medium. First, apical microleakage was tested by fluid filtration in one of the mesial root canals. Secondly, the adaptation of gutta-percha was investigated at the 1.5, 2.5 and 3.5 mm from the apical foramen using stereomicroscope with 20x. The sections were compared considering area filled with gutta-percha, in relation to the instrumented area, the total area of the root canal and the area of gaps present in root fillings. Apical microleakage showed no statistical difference among the groups tested. When analyzing the area occupied by gutta-percha to instrumented area, total area and area of gaps among the different sections (1.5, 2.5 and 3.5) in the same group in both preparations there was no difference statistical. In contrast when it was considered in the instrumented area in Group 5, no statistical difference comparing the sections 1.5 and 2.5 mm. For the total area, in group 2, we obtained difference in the sections at 1.5 and 2.5 mm. When we considered the same section (1.5, 2.5 and 3.5) for the different groups, particularly for field instruments, the group 5 showed better results than in Group 4 cut to 1.5 mm. For the total area, 1.5 mm section level, the Group 5 showed better adaptation of gutta-percha than Group 6. The cones of different taper showed similar adaptions in both apical stop preparation and continuous tapered preparation. The presence or absence of the apical stop, taper and adaptation of gutta-percha and the diameter of apical foramen did not affect the apical seal the filling
Mestrado
Endodontia
Mestre em Clínica Odontológica
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Souza, Erick Miranda [UNESP]. "Avaliação da qualidade da obturação de canais radiculares e da confiabilidade do modelo de penetração de glicose." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/101641.
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souza_em_dr_arafo.pdf: 523065 bytes, checksum: 1f16938a629ebc74f2bcba8ab193a12c (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Diferentes técnicas de compactação da guta-percha (GP) e cimentos oburadores podem alterar a qualidade final da obturação do canal radicular. Recentemente foi introduzido um novo modelo de análise da qualidade de obturações endodônticas baseado na mensuração da concentração da glicose que passa pela falha na obturação. Este trabalho é composto por três capítulos cujos objetivos foram: a) determinar os efeitos de variações na técnica de condensação lateral (LC) e da área do canal na qualidade da obturação; b) verificar se diferentes materiais obturadores alteram a concentração do traçador utilizado no modelo de penetração de glicose, e; c) determinar se são similares os resultados de infiltração dos mesmos espécimes avaliados pelos modelos de penetração de glicose e transporte de fluidos. No primeiro estudo sessenta caninos humanos foram instrumentados e divididos em três grupos obturados por diferentes técnicas de LC e cimento AH Plus. Uma nova técnica usando uma seqüencia de espaçadores antes da colocação de um cone acessório foi comparada com duas técnicas comumente utilizadas. As raízes obturadas foram seccionadas nos níveis 3 mm e 6 mm a partir do ápice e as secções fotografadas. Usando um software de análise de imagens, as áreas do canal e de GP em cada nível foram mensuradas e a porcentagem de área obturada por guta-percha (PGP) foi calculada. Análise múltipla de variância foi utilizada para verificar as variáveis influenciando a PGP. Teste de regressão linear foi utilizado para verificar a influência da área do canal na PGP em cada nível de secção. Em ambas as secções o canal mais largo foi 2-3 vezes maior que o menos largo. Quanto maior a área do canal, menor a PGP nos níveis 6 mm (r2=0,154, P=0,02) e 3 mm (r2=0,119, P=0,007). A PGP no nível 3 mm foi menor que a 6 mm (P=0.003). A nova técnica atingiu maior PGP que as demais em ambos os níveis (P<0.05).
Different gutta-percha (GP) compaction techniques and root canal sealers may affect the final quality of the root canal filling. Recently, it was discussed a new method for evaluation of the quality of root fillings based on measuring the concentration of the glucose that penetrates through voids in the obturation. This work is divided in 3 chapters aiming to: a) determine the effects of different techniques and canal area on the quality of laterally compacted root fillings; b) verify whether different filling materials react with the tracer used in the glucose penetration model, and; c) determine whether leakage results of the same specimens measured by the glucose penetration and fluid transport are comparable. In the first study sixty extracted canines were instrumented to the same size and equally divided in three groups filled with laterally compacted GP cones and AH Plus sealer using different techniques. A new technique with use of a sequence of spreaders prior to the accessory cone placement was compared to two commonly used techniques. The filled roots were horizontally sectioned at 3 mm and 6 mm from the apex and micro-photographs of the cross-sections were taken. Using an image-analysis software, the canal and GP areas at each level were measured. The percentage of gutta-percha filled canal area (PGP) was calculated. A Multivariate analysis was used to account for the variables influencing the PGP. Linear regression test was used to verify the influence of canal area on PGP. At each level the largest canal was 2-3 times larger than the smallest. The larger the canal area, the lower the PGP at 6 mm level (r2= 0.154, P=0.02) and at 3 mm level (r2=0.119, P=0.007). The PGP at 3 mm was lower than at 6 mm (P=0.003). The new technique achieved higher PGP than other techniques (P=0.00002).
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VerÃssimo, Denusa Moreira. "ComparaÃÃo da infiltraÃÃo apical entre canais obturados com guta-percha/AH Plus e o Sistema Resilon/Epiphany quando submetidos a duas tÃcnicas de obturaÃÃo." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=528.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorO propÃsito deste estudo in vitro foi comparar o nÃvel de infiltraÃÃo apical entre guta-percha/AH Plus (GP) e Sistema Resilon/Epiphany (SRE) quando submetidos a duas tÃcnicas de obturaÃÃo, e observar, atravÃs do uso de Microscopia Ãptica (MO), a adaptaÃÃo destes materiais Ãs paredes dentinÃrias em cortes transversais realizados a 4mm do Ãpice. Para a avaliaÃÃo da infiltraÃÃo, 70 raÃzes de dentes humanos extraÃdos foram instrumentadas e divididas aleatoriamente em quatro grupos experimentais de acordo com o material e tÃcnica empregados (condensaÃÃo lateral e tÃcnica HÃbrida-TH) e dois grupos controles (positivo e negativo). ApÃs sete dias em estufa (37ÂC, umidade de 100%), as raÃzes foram imersas em tinta nanquim (7 dias) e diafanizadas. A infiltraÃÃo linear foi medida atravÃs do programa NIH imageJ. Utilizou-se o teste exato de Fisher, para a comparaÃÃo entre percentual de nÃo-infiltraÃÃo e teste nÃo-paramÃtrico de Mann-Whitney, para testar o comprimento de infiltraÃÃo, quando esta existiu. O valor de p<0,05 foi considerado ser estatisticamente significante. Na presenÃa de infiltraÃÃo, nÃo houve diferenÃa entre as tÃcnicas de obturaÃÃo empregadas (p>0,05), mas houve diferenÃa estatisticamente significante quando o SRE foi comparado à GP (p<0,05), que apresentou maior infiltraÃÃo. Concluiu-se que a infiltraÃÃo com o SRE ficou confinada ao terÃo apical e a TH pode ser utilizada para termoplastificaÃÃo do SRE com resultados satisfatÃrios. Observou-se atravÃs da anÃlise em MO dos 20 dentes restantes, obturados da mesma forma que os grupos experimentais (cinco dentes para cada grupo), que o SRE apresentou muitas Ãreas de desadaptaÃÃo entre o material e as paredes dentinÃrias, fato que justificaria a infiltraÃÃo ocorrida com esse material.
The purpose of this study was to compare the level of apical leakage between canals filled with gutta-percha/AH Plus (GP) and the Resilon/Epiphany System (RES), when submitted to two filling techniques, and to observe, through the use of Optic Microscopy (OM), the adaptation of these materials to the dentinal walls in carried through transversal cuts to 4 mm of the apex. For the evaluation of leakage, seventy extracted human teeth were instrumented and randomly divided into 4 experimental groups in accordance with the material and technique used (lateral condensation and Hybrid technique - HT), and two control groups (positive and negative). After 7 days in an oven (37Â C, humidity of 100%), the teeth were immersed in Indian ink and cleared. Leakage was measured by the NIH imageJ program. The exact Fisher test was used to make the comparison between the non-leakage percentages and the non-parametric Mann-Whitney test to measure the leakage when there was any. The value p<0.05 was considered to be statistically significant. With regard to the presence of leakage, there was no difference between the filling techniques (p>0.05), but there was a statistically significant difference when RES was compared with GP (p<0.05), which leaked more than RES. With RES, leakage was confined to the apical third and HT could be used to thermo-plasticize RES with satisfactory results. It was observed through the analysis in OM of 20 remaining teeth, filled in the same way that the experimental groups (5 teeth for each group), that the RES presented many areas mismatch between the material and the dentinal walls, what it would justify occurred leaking with this material.
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Strefezza, Fábio. "Avaliação quantitativa e qualitativa da extrusão apical em técnicas de obturação termoplastificada." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/23/23135/tde-12072004-143348/.
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Atualmente, as técnicas de obturação com guta-percha termoplastificada têm mostrado eficiência na adaptação dos materiais obturadores às paredes do sistema de canais radiculares, promovendo um selamento tridimensional. Porém, com a utilização destas técnicas, há dificuldade no controle longitudinal durante a obturação, que poderia acarretar em extrusão do material obturador em direção aos tecidos perirradiculares, influenciando na reparação pós tratamento endodôntico. Assim, o propósito deste estudo foi avaliar in vitro a extrusão apical de quatro técnicas de obturação termoplastificada, Thermafil, Obtura II, Ultrafil 3D e Fusionada, através de uma nova metodologia de mensuração de volume do material obturador extruído, relacionando com a freqüência da extrusão visual de guta-percha e/ou cimento e a qualidade radiográfica final da obturação. Os resultados demonstraram que a metodologia do sistema de mensuração foi efetiva para quantificar o volume de material obturador extruído, constatando extrusão em todas as técnicas termoplastificadas empregadas neste estudo, porém, quantitativamente, os grupos experimentais não apresentaram diferenças estatisticamente significantes entre as médias de volumes. Na avaliação radiográfica da qualidade final das obturações termoplastificadas, há evidências de que a técnica Obtura II produziu obturações endodônticas com qualidades estatisticamente inferiores às demais técnicas. De modo geral, podemos considerar que as técnicas Thermafil, Ultrafil 3D e Fusionada apresentaram resultados semelhantes em relação ao volume do material obturador extruído e qualidade radiográfica final da obturação, enquanto que as técnicas Thermafil e Fusionada exibiram resultados mais favoráveis em relação à freqüência da extrusão visual de guta-percha e/ou cimento.In the present, the obturation techniques with termoplasticized gutta-percha have been proving efficiency in adaptation of the filling material to the walls of the root canal system, promoting a three-dimensional sealing. Even so, with the use of these techniques, there is difficulty in the longitudinal control during the obturation, that could cause the extrusion of the filling material in direction to the perirradicular tissues, influencing the healing after endodontic treatment. Thus, the purpose of this study was to evaluate in vitro the apical extrusion of four thermoplasticized obturation techniques, Thermafil, Obtura II, Ultrafil 3D and Fused, with a new methodology of volume?s measurement of the extruded filling material, relating with the frequency of the visual extrusion of gutta-percha and/or sealer and the final radiographic\'s quality of obturation. The results demonstrated that the methodology of the measurement system was effective to quantify the volume of the extruded filling material, verifying extrusion in all the thermoplasticized techniques studied, even so, quantitatively, the experimental groups didn\'t present statistically significant differences among the averages of volumes. In the radiographic evaluation of the final quality of thermoplasticized obturation, there are evidences that Obtura II technique produced endodontic obturation with qualities statistically inferior of the other techniques. In general, we can consider that Thermafil, Ultrafil 3D and Fused techniques presented similar results in relation to the volume of the extruded filling material and the final radiographic\'s quality of obturation, while Thermafil and Fused techniques exhibited more favorable results in relation to frequency of visual extrusion of gutta-percha and/or sealer.
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Melo, Marcello Ghetti de. "Quantificação da área ocupada pela guta-percha e pelo Resilon em canais achatados após termoplastificação." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3062.
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O presente trabalho teve por objetivo quantificar, comparativamente, a área de preenchimento de dois materiais obturadores sólidos, cones de guta-percha (GP) e cones de Resilon (R), no terço apical de incisivos inferiores humanos, ex vivo, obturados pela técnica da onda contínua de condensação. Os espécimes foram submetidos a um protocolo, desde a cirurgia de acesso até o final do preparo químico-mecânico e divididos aleatoriamente em dois grupos, de 21 dentes cada, de acordo com o material utilizado. Não foi utilizado cimento endodôntico em nenhuma das amostras. Após a obturação, as amostras foram seccionadas transversalmente em dois níveis, a 3 e a 5mm do ápice, e subdivididas em grupos de acordo com a altura de corte e do material obturador, sendo estabelecido: GP3 (guta-percha com corte a 3mm), GP5 (guta-percha com corte a 5mm), R3 (Resilon com corte a 3mm) e R5 (Resilon com corte a 5mm). Posteriormente, as amostras foram submetidas a um processo de lixamento e polimento e examinadas em microscópio óptico por reflexão com aumento de 50x a 100x. Para a análise e processamento digital das imagens, foi utilizado o sistema de imagens Axio Vision 4.6 para Windows, sendo obtidas as medidas para cada área observada em micrômetros (μm); uma da área da cavidade, e outra da área de material obturador. Foi aferido o grau de circularidade de cada amostra, por uma fórmula matemática utilizada automaticamente pelo programa, onde 1 (um) é considerado o círculo perfeito e, quanto mais achatado o canal, mais tendente a 0 (zero) nesta escala. Obteve-se a área do canal, a circularidade de 0 a 1, a área preenchida pelo material obturador e, a porcentagem da área de preenchimento do material obturador em relação à área do canal. Foi realizado o cruzamento dos grupos dois a dois pelo teste t de Student, sendo verificada diferença estatisticamente significante entre os grupos GP3 e R3, tendo o grupo R3 apresentado maior porcentagem de área do canal radicular preenchida pelo material obturador em suas amostras (p<0,05). Na relação da circularidade com a quantidade de preenchimento, com o teste de Correlação de Pearson, não foi observada forte correlação entre a forma final do canal (relação de circularidade) e a quantidade de preenchimento do canal radicular pelos materiais obturadores testados. Conclui-se que houve grande variação de preenchimento mínimo e máximo em todos os grupos testados e o Resilon apresentou maior porcentagem de preenchimento de área do canal radicular em suas amostras.The aim of this study was to determine a quantitative comparison of gutta-percha and Resilon filled areas in the apical third of human mandibular incisors, ex vivo, after obturation by continuous wave condensation technique. The tooth samples were submitted to irrigation and instrumentation protocol and randomly divided in two groups of twenty-one each. No sealer was used. After obturation, a horizontal section was cut 3mm and 5mm from the apical foramen of each tooth. The two groups were subdivided according to cut height and obturation material as follows: GP3 (gutta-percha with 3mm section), GP5 (gutta-percha with 5mm section), R3 (Resilon with 3mm section) e R5 (Resilon with 5mm section). The samples were later prepared for microscopic analysis and photomicrographs of each apical surface were taken at magnifications from 50x to 100x. The cross-sections of the canal areas with the obturation materials were measured using an image analysis program, obtaining the measurement of each canal area and filled area in micrometers. The circular form of each sample was rated automatically by a mathematic formula used by the program, where 1 (one) is considered a perfect circle, and as it flattens, the value approaches 0 (zero). The digital imaging analysis obtained the canal area, the circular form from 0 to 1, the area filled by obturation material, and the percentage of material filled area relative to the canal area. The percentage difference of the filled canal area among the groups was analyzed using a Students t-test. Significant differences were found between GP3 and R3. The greatest percentage of filled canal area occurred in the R3 group (p<0,05). With respect to the relationship of the circular form with the quantity of filling material, by using the Pearson Correlation test, no significant correlation was found between the final form of the canal and the quantity of root canal filling by the obturation materials tested. In conclusion, a great variation in the minimum and maximum filled percentage occurred all groups tested and the Resilon group showed a higher percentage of filled root canal area in their samples.
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Kayafas, A. L. Christopher. "Obturation with gutta percha of greater taper." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=486.
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Thesis (M.S.)--West Virginia University, 1999.Title from document title page. Document formatted into pages; contains vii, 69 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 56-60).
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Souza, Lute Rafael de. "Estudo da degradaÃÃo microbiana in vitro do Poli (1,4-trans-isopreno) (in natura) e em cones dentÃrios." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8735.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorOs cones de guta-percha usados em endodontia, compostos de poli (1,4-trans-isopreno), ZnO e/ou BaSO4 e ceras/resinas, foram feitos para durar a vida inteira nos canais radiculares por eles preenchidos. Entretanto, existem evidÃncias de que esses materiais sofrem degradaÃÃo com o decorrer do tempo de obturaÃÃo intensificada quando existem infecÃÃes por microrganismos. A bactÃria Enterococcus faecalis à um desses microrganismos, normalmente associada com infecÃÃes periapicais persistentes. A prevalÃncia dessa bactÃria em casos de re-tratamento ocorre entre 29 e 79% dos casos. O objetivo do trabalho à estudar a degradaÃÃo bacteriana de cones de guta-percha em meio contendo E. faecalis, com o foco na matÃria orgÃnica, o poliisopreno. Cada amostra de cone foi imersa em meio de sais minerais com inÃculo de concentraÃÃo de 5,4x105 UFC/mL por perÃodos de 10 a 100 dias. Os cones foram removidos do contato com o inÃculo em tempos variados e analisados. Foram pesados e caracterizados por TGA, GPC, FTIR, MEV e RMN H1. O crescimento do inoculo foi monitorado atravÃs de medidas de densidade Ãptica, determinaÃÃo da porcentagem de mineralizaÃÃo de CO2, medidas da biomassa seca de cÃlulas, medidas de pH e contagem de cÃlulas. A atividade antimicrobiana dos constituintes inorgÃnicos dos cones foi verificada mediante o teste de difusÃo em poÃo. Foi observada perda gradual de massa dos cones com o tempo de degradaÃÃo. O aumento no teor de resÃduos em 800ÂC, mostra que houve uma perda progressiva de matÃria orgÃnica e um aumento na proporÃÃo de constituintes inorgÃnicos. ApÃs o contato com E. faecalis, o poliisopreno isolado dos cones das marcas Odous e Tanari foi analisado e comparado com o poliisopreno in natura por GPC e FTIR. Os resultados mostram que nos trÃs casos ocorre uma pequena e gradual perda de massa molar do poliisopreno constituintes do material, mais evidenciada no poliisopreno in natura. Os espectros de infravermelho mostram que a degradaÃÃo tambÃm ocorre com modificaÃÃes estruturais do polÃmero, especialmente no surgimento de bandas de deformaÃÃo de C=O e OH/OOH; e variaÃÃes no padrÃo de cristalinidade das bandas de C=C-H. As imagens de MEV mostram que podem ocorrer mudanÃas na morfologia da superfÃcie dos cones biodegradados, resultado do ataque seletivo ao componente orgÃnico. Os espectros de RMN de H1 do poliisopreno in natura mostram que o material sofreu pequenas mudanÃas estruturais nas molÃculas de poliisopreno durante o bioensaio. Todos os bioensaios de monitoramento indicaram que o inÃculo cresce continuamente durante o perÃodo de contato com os cones ou com o poliisopreno in natura. A bactÃria degrada a matÃria orgÃnica dos cones usando-os como fonte de substrato e, consequentemente, causando vazios nos cones que podem ocasionar falhas no tratamanto endodÃntico.
The gutta-percha cones used in endodontic therapy, consisting of poly (1,4-trans-isoprene), ZnO and/or BaSO4 and wax/resin, were meant to last a lifetime in root canals filled by them. However, there is evidence that these materials suffer degradation with the passage of time when there shutter intensified infections by microorganisms. The bacterium Enterococcus faecalis is one of those microorganisms commonly associated with persistent periapical infections. The prevalence of this bacterium in cases of re-treatment is between 29% and 79% of cases. The objective is to study the bacterial degradation of gutta-percha in medium containing E. faecalis, with the focus on organic matter, polyisoprene. Each sample cone was immersed in mineral salts medium with inoculum concentration of 5.4 x 105 CFU/mL for periods of 10 to 100 days. The cones were removed from contact with the inoculum at various times and analized. Were weighed and characterized by TGA, GPC, FTIR, NMR H1 and SEM. The growth of the inoculum was monitored by optical density measurements, determining of percentage of mineralization of CO2, measured dry biomass cells, measurements of pH and cell count. The antimicrobial activity of inorganic constituents of cones was verified by diffusion test pit. Was observed gradual loss of mass of the cones with the degradation time. The increase in the ash content at 800 ÂC, shows that there was a progressive loss of organic matter and an increased proportion of inorganic constituents. After contact with E. faecalis, polyisoprene isolated cones marks Odous and Tanari was analized and compared and the fresh polyisoprene by GPC and FTIR. The results show that in all three cases there is small and gradual loss of the molar mass of the polyisoprene constituents of material, the more evidente in polyisoprene in nature. Infrared spectra show that degradation also ocurrs with strutural modifications of the polymer, especially in the occurrence of deformation bands of C=O and OH/OOH, and variations in the pattern of cristalinity of the bands of C=C-H. The SEM images show that changes may ocurr in the surface morphology of the cones biodegraded, resulting the from selective attack to the organic component. The NMR H1 spectra of polyisoprene fresh show that the material has undergone minor structural changes in the molecules of polyisoprene during bioassay. All bioassays monitoring indicated that the inoculum grows continuously during the period of contact with the cones or polyisoprene in nature. The bacteria degrades the organic matter of the cones using them as a source of substrate and thereby causing voids cones that can cause failure in endodontic treatment.
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Carvalho, Ceci Nunes. "Efeito da adição de partículas de vidro niobofosfato bioativo à guta-percha: desenvolvimento, caracterização, resistência de união à dentina e influência na formação de biofilmes microbianos." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/23/23145/tde-11092014-153436/.
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Os objetivos deste estudo foram desenvolver e caracterizar um compósito para obturação endodôntica à base de guta-percha e vidro niobofosfato. Foi avaliado a resistência de união à dentina radicular do compósito experimental, da guta EndoSequence BC, ambos sem o uso de cimento além do cimento AH Plus associado a guta-percha através do ensaio de push-out. A análise dos padrões de fratura foi realizada com auxílio de MEV. Análises usando EDX and MEV-EDS foram realizadas para verificar a composição e distribuição das partículas de vidro na superfície e no interior da matriz de guta-percha dos materiais testados. Os resultados foram analisados estatisticamente pelos testes ANOVA e Tukey, sendo considerado significante quando p < 0,05. Foi avaliado também a influência do compósito experimental, do vidro niobofosfatos bioativo, diferentes tipos de gutapercha e hidroxiapatita na adesão e formação de biofilme por bactérias orais com coloração Live/dead usando um microscópio confocal à laser. O biofilme multiespécies foi formado na superfície de discos de hidroxiapatita - HA, vidro niobofosfato - VNB, guta-percha Obtura - OBT, guta-percha Protaper - PTP, EndoSequence BC guta-percha - GBC e o compósito experimental guta-percha associado com o vidro niobofosfato - GNB. O biovolume total (mm3), biovolume de bacterias viáveis (mm3), e porcentagem de bactérias viáveis (%) foram quantificados. As diferenças entre os grupos foram avaliadas usando ANOVA de dois fatores e teste de Tukey para contraste de médias (=0,05). Os materiais testados foram imersos em PBS e o pH das soluções foi avaliado. Os materiais foram imersos em água deionizada e as soluções foram analisadas em ICP-OES (Espectrometria de emissão atômica por plasma acoplado indutivamente) para determinar a liberação de diferentes elementos químicos. AH Plus e o material experimental não mostraram diferença estatística significante na resistência de união à dentina (2,83 MPa e 2,68 MPa respectivamente). Já o material Guta EndoSequence BC apresentou o menor valor de resistência de união (1,34 MPa) com diferença estatística significante em comparação aos demais grupos (p < 0,05). Os grupos GNB, GBC e VNB apresentaram os menores valores de biovolume total em 30 dias. Os maiores valores de biovolume viável em 30 dias de incubação em ordem decrescente foram: HA; PTP e OBT; GBC e VNB e finalmente GNB. Com relação a porcentagem de biovolume viável o material experimental GNB apresentou os menores valores para 3 e 30 dias enquanto o VNB apresentou o menor valor para 14 dias com diferença estatisticamente significante em relação aos demais grupos (p < 0,05). O material experimental GNB apresentou o maior valor de pH após 30 dias de imersão em PBS e maior liberação de Zn em todos os períodos analisados quando comparado aos demais grupos e maior liberação de Ca aos 14 e 30 dias semelhante ao grupo GBC, o qual liberou mais Si comparado aos demais grupos nos períodos de 14 e 30 dias. O material obturador experimental mostrou habilidade em aderir à dentina radicular de maneira similar à obturação convencional com guta-percha e cimento (Ah Plus) e foi capaz de inibir a formação de biofilme microbianos quando comparado a HA e guta-percha convencionais.The objectives of this study were to develop and characterize a composite for endodontic obturation based gutta-percha and niobium phosphate glass. The study evaluated the composites micropush-out bond strength to root dentine of the experimental gutta-percha and niobium phosphate glass composite applied with thermoplastic technique to the root canals without sealer in a moist environment and compare to the conventional root canal obturation Ah Plus and gutta-percha, and a commercial bioceramic gutta without sealer. Additionally, the cores materials were characterized using Scanning Electron Microscopic/Energy-dispersive X-ray (SEM/EDS) and Energy Dispersive X-ray fluorescence spectrometry (EDX) analysis. The failure mode was analyzed with SEM. Analysis using EDX and SEMEDS was carried out to verify the composition and distribution of the particles of the tested materials. Data were statistically analyzed by one-way ANOVA and Tukeys test (p < 0,05). Also was analysed the influence of different types of gutta-percha and bioactive niobium phosphate glass on the adherence and biofilm formation by oral bacteria from human dental plaque with Live/dead staining assay using confocal laser scanning microscopy (CLSM). The multispecies biofilm was grown from plaque bacteria on discs of hydroxyapatite - HA, niobium phosphate bioactive glass- VNB, Obtura pellets - OBT, Protaper gutta-percha - PTP, EndoSequence BC gutta-percha - GBC and gutta-percha associated with niobium phosphate glass - GNB in brain-heart infusion broth for 3,14 and 30 days. After the growth induction periods, specimens were stained by using Live/Dead, and the images were analyzed under a CLSM. The total biovolume (mm3), viable biovolume (mm3), and Live percentage (%) were quantified. Biofilm structure was visualized by scanning electron microscopy (SEM). The materials were immersed in phosphate-buffered saline (PBS) and the pH in the solutions was monitored. The materials were also immersed in deionized water and the solutions were analyzed with ICP-OES (Inductively Coupled Plasma - optical emission spectrometry) to determine elemental release. AH Plus and GNB groups showed bond strengths of 2,83 MPa and 2,68 MPa respectively, with no statistically significant difference between them (p > 0,05). GBC group had the lowest bond strength average (1,34 MPa), which was a statistically significant difference compared to the other groups (p < 0,05). Groups GBC, GNB and VNB presented the lowest total biovolume values in 30 days. The highest viable biovolume values in 30 days of incubation, in decreasing order, were as follows: HA; PTP and OBT; GBC and VNB and finally GNB. As regards live percentage, the experimental material GNB presented the lowest values at 3 and 30 days, while VNB presented the lowest value at 14 days, with statistically significant difference in comparison with the other groups (P < 0,05). The experimental material GNB presented the highest pH value after 30 days of immersion in PBS, and greatest Zn release in all the time intervals analyzed when compared with the other groups; and the greatest Ca release at 14 and 30 days, similar to Group GBC, which released a larger quantity of Si when compared with the other groups in the time intervals of 14 and 30 days. The experimental root filling composite (GNB) showed an ability to adhere to root dentine equal to the current gold standard root filling with gutta-percha and sealer (Ah Plus) and was able to inhibit the formation of microbial biofilm when compared to HA and conventional gutta-percha.
Books on the topic "Gutka"
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Gutka. Gutka: Du ghetto de Varsovie à la liberté retrouvée. Paris: Harmattan, 1999.
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Reḍḍi, Kāsula Pratāp. Gukka: Kāsula Pratāpareḍḍi kavitvaṃ. Kōdāḍa: Spr̥ha Sāhitī Saṃstha, 2005.
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MacLean, Colin. Monkeys, bears and gutta percha. East Linton: Tuckwell Press in association with the European Ethnological Research Centre, 2001.
Find full textBook chapters on the topic "Gutka"
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Becerra, Patricio. "Gutta." In Encyclopedia of Planetary Landforms, 1–4. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-9213-9_442-1.
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Becerra, Patricio. "Gutta." In Encyclopedia of Planetary Landforms, 908–10. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-3134-3_442.
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Gooch, Jan W. "Gutta-Percha." In Encyclopedic Dictionary of Polymers, 353. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5735.
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Bährle-Rapp, Marina. "Gutta Percha." In Springer Lexikon Kosmetik und Körperpflege, 236. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_4534.
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Baker, Ian. "Gutta Percha." In Fifty Materials That Make the World, 89–91. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78766-4_17.
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Lim, T. K. "Garcinia gummi-gutta." In Edible Medicinal And Non-Medicinal Plants, 45–55. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1764-0_7.
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Gooch, Jan W. "Gutta-Percha, Synthetic." In Encyclopedic Dictionary of Polymers, 353. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5736.
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van Keulen, Dirk. "Gutta cavat lapidem?" In Weltgestaltender Calvinismus, 171–86. Göttingen: Vandenhoeck & Ruprecht, 2021. http://dx.doi.org/10.13109/9783788735326.171.
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Barlow, F. W. "Rubber, Gutta, and Chicle." In Natural Products of Woody Plants, 1028–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74075-6_29.
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Du Port, François. "Treatment of Amaurosis, or Gutta Serena." In The Decade of Medicine or The Physician of the Rich and the Poor, 118. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73715-2_169.
Full textConference papers on the topic "Gutka"
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Aloy, A. S., N. V. Sapozhnikova, A. G. Anshits, O. M. Sharonova, A. A. Tretyakov, D. A. Knecht, T. J. Tranter, and J. Macheret. "HUP Immobilization of Uranium and Plutonium From Surrogate Liquid Radioactive Solutions Using Porous Molded Glass Crystalline Blocks (Gubka)." In ASME 2001 8th International Conference on Radioactive Waste Management and Environmental Remediation. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/icem2001-1214.
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Abstract This paper describes test results for immobilization of surrogate radioactive actinide solutions. A glass crystalline porous material, Gubka, or “sponge” in Russian, was tested to immobilize surrogates of two types of actinide solutions, which exist in the DOE complex. Solutions using uranium as a surrogate for plutonium were stabilized in the porous Gubka block by successive saturation and drying cycles. After calcining, fully dense glass-ceramic tablets were formed in a hot uniaxial press. The tablets included 2–3 different glass phases with no uranium content and a uranium phase. Detailed electron micrographs and X-ray diffraction results are presented in the paper.
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Tuğlu, Mehmet Ibrahim. "In Vitro Comparison of Cytotoxicity of Gutta Flow Bioseal, Gutta Flow 2, AH Plus and MTA Fillapex." In 15th International Congress of Histochemistry and Cytochemistry. Istanbul: LookUs Scientific, 2017. http://dx.doi.org/10.5505/2017ichc.pp-08.
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Vorobyov, G. M., D. A. Ovsyannikov, A. D. Ovsyannikov, E. V. Suhov, E. I. Veremey, V. M. Zavadsky, and A. P. Zhabko. "The Experiments of the small Spherical Tokamak Gutta." In PLASMA AND FUSION SCIENCE: 16th IAEA Technical Meeting on Research using Small Fusion Devices; XI Latin American Workshop on Plasma Physics. AIP, 2006. http://dx.doi.org/10.1063/1.2405902.
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Aloy, A. S. "Immobilization of Pu-containing solution using a porous crystalline (Gubka) matrix." In Plutonium futures-The science (Topical conference on Plutonium and actinides). AIP, 2000. http://dx.doi.org/10.1063/1.1292238.
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Ortega-Martı́nez, Roberto, Antonio Rodrı́guez-Rosales, Manuel Calzada-Nova, and Antonio Copin-Tovar. "Softening of the gutta-percha by laser irradiation and its thermal impact in the canal obturation." In MEDICAL PHYSICS. ASCE, 1998. http://dx.doi.org/10.1063/1.56382.
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Diana, Rasda, Andina Widyastuti, and Pribadi Santosa. "One-Visit Apexification in Management of Gutta Percha Extrusion and Condensing Osteitis: 4 Years Follow-Up." In 4th International Conference on Sustainable Innovation 2020–Health Science and Nursing (ICoSIHSN 2020). Paris, France: Atlantis Press, 2021. http://dx.doi.org/10.2991/ahsr.k.210115.034.
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Dewiyani, Sari, Narlan Sumawinata, and Diah Indriastuti. "The Differences Results Of Root Canal Filling Between The Thermafil Technique And The Gutta Perca Lateral Condensation Technique." In International Conference on Environmental Awareness for Sustainable Development in conjunction with International Conference on Challenge and Opportunities Sustainable Environmental Development, ICEASD & ICCOSED 2019, 1-2 April 2019, Kendari, Indonesia. EAI, 2019. http://dx.doi.org/10.4108/eai.1-4-2019.2287272.
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Surendran, Prabu, Sahil Gupta, Tiberiu Preda, and Igor Pioro. "Comparison of Existing Supercritical Carbon Dioxide Heat Transfer Correlations for Horizontal and Vertical Bare Tubes." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-54630.
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This paper presents a thorough analysis of ability of various heat transfer correlations to predict wall temperatures and Heat Transfer Coefficients (HTCs) against experiments on internal forced-convective heat transfer to supercritical carbon dioxide conducted by Koppel [1], He [2], Kim [3] and Bae [4]. It should be noted the Koppel dataset was taken from a paper which used the Koppel data but was not written by Koppel. All experiments were completed in bare tubes with diameters from 0.948 mm to 9 mm for horizontal and vertical configurations. The datasets contain a total of 1573 wall temperature points with pressures ranging from 7.58 to 9.59 MPa, mass fluxes of 400 to 1641 kg/m2s and heat fluxes from 20 to 225 kW/m2. The main objective of the study was to compare several correlations and select the best of them in predicting HTC and wall temperature values for supercritical carbon dioxide. This study will be beneficial for analyzing heat exchangers involving supercritical carbon dioxide, and for verifying scaling parameters between CO2 and other fluids. In addition, supercritical carbon dioxide’s use as a modeling fluid is necessary as the costs of experiments are lower than supercritical water. The datasets were compiled and calculations were performed to find HTCs and wall and bulk-fluid temperatures using existing correlations. Calculated results were compared with the experimental ones. The correlations used were Mokry et al. [5], Swenson et al. [6] and a set of new correlations presented in Gutpa et al. [7]. Statistical error calculations were performed are presented in the paper.
Reports on the topic "Gutka"
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Roberts, Howard W. Thermal Properties of Contemporary and Conventional Gutta Percha Materials Used in Root Canal Treatment. Fort Belvoir, VA: Defense Technical Information Center, January 2015. http://dx.doi.org/10.21236/ada612962.
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