Дисертації з теми "Abscesso periapical"
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Nobrega, Letícia Maria Menezes 1983. "Estudo da diversidade bacteriana de canais radiculares infectados em casos de abscesso apical agudo por cultura, clonagem e sequenciamento do gene 16S rRNA." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290434.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Abscessos apicais agudos são condições frequentes na urgência endodôntica. São infecções polimicrobianas que apresentam variações entre indivíduos, e afetam o sistema de canais radiculares e tecidos periapicais. Associações bacterianas podem ser importantes, agindo sinergicamente e aumentando sua virulência, o que agrava os danos causados no hospedeiro. Considerando a etiologia microbiana das alterações pulpares e periapicais, é de fundamental importância identificar corretamente as bactérias presentes nas infecções endodônticas. Métodos moleculares de identificação bacteriana, baseados no sequenciamento do gene 16S rRNA, são importantes e fornecem uma identificação mais fiel que métodos fenotípicos. Estudos metagenômicos são ideais para avaliação da diversidade bacteriana, possibilitando identificação de espécies que se acreditava não estarem sendo cultivadas, ou encontrar espécies que ainda não foram encontradas ou associadas com infecções endodônticas, incluindo espécies ainda não cultiváveis. O objetivo deste estudo foi investigar a diversidade bacteriana de canais radiculares de dentes com abscesso apical agudo por cultura, clonagem e sequenciamento do gene 16S rRNA, compararando a efetividade dos métodos. Foram feitas coletas microbiológicas de 20 canais radiculares utilizando cones de papel absorvente estéreis, transportados em meio VMGA III. Um total de 220 cepas isoladas, identificadas previamente por métodos bioquímicos, foram submetidas à extração de DNA, amplificação do gene 16S rRNA seguido de sequenciamento. Além disso, 10 das 20 amostras coletadas foram também submetidas à clonagem bacteriana através de Escherichia coli DH5? eletrocompetentes. As sequências de nucleotídeos obtidas foram comparadas com o banco de dados do National Center of Biotechnology Information através do BLAST. Trinta e quatro espécies diferentes foram identificadas bioquimicamente e 57 pelo sequenciamento, numa média de 6 espécies por canal. O sequenciamento permitiu identificação de 97% das bactérias isoladas (215), enquanto apenas 70,5% foram identificadas bioquimicamente (155). A concordância entre os métodos de identificação fenotípica e genotípica foi de 49% e as cepas não identificadas bioquimicamente (65/220) foram caracterizadas em 97% (63/65) pelo sequenciamento. As bactérias mais frequentemente identificadas pelo sequenciamento foram Prevotella spp., Pseudoramibacter alactolyticus, Parvimonas micra, Dialister invisus, Filifactor alocis e Peptostreptococcus stomatis. Um total de 689 clones foi analisado e 76 filotipos foram identificados, numa média de 15 por canal. Quarenta e oito espécies diferentes foram identificadas e 28 (36,84%) filotipos representados por espécies ainda não cultivadas ou não caracterizadas. Prevotella spp., Fusobacterium nucleatum, Filifactor alocis e Peptostreptococcus stomatis, foram às espécies mais frequentemente identificadas, seguidas por Dialister invisus, Parvimonas micra, Phocaeicola abscessus, Porphyromonas spp. e Lachnospiraceae oral clone. Nenhuma espécie foi encontrada em todos os casos estudados, e algumas estavam presentes em apenas 1 caso. Métodos que independem da cultura mostram que a microbiota endodôntica pode ser subestimada por estudos cultura-dependentes. Apesar de algumas espécies serem predominantes em infecções endodônticas primárias, como as anaeróbias Gram-negativas, concluímos que esta infecção é bastante complexa e heterogênea, caracterizada por uma grande diversidade bacteriana. A associação de métodos convencionais e moleculares permite um conhecimento mais acurado da microbiota endodôntica
Abstract: Acute apical abscesses are one of the most frequently treated conditions in endodontic emergency. It is a microbiologically heterogeneous disease presenting different bacterial profiles among the patients. Multiple bacterial combinations play a role in disease, acting synergistically and increasing their virulence, which leads to further damage to the host. Considering the microbial etiology of pulp and periapical disease, it is important to identify correctly microorganisms present in acute endodontic infection. Molecular methods of bacterial identification based on the 16S rRNA gene sequencing represent an important tool for identification and determination of the taxonomic position of microorganisms. The assessment of the endodontic microbiota by metagenomic approaches revealed that these techniques are sensitive and specific to evaluate the bacterial diversity of root canal infections, making possible the identification of some unexpected or not often associated with endodontic infection, including as-yet-uncultivated. The aim of this study was to investigate the bacterial diversity in the root canals of teeth with APA by culture, clonal analysis and 16S rRNA sequencing. Microbial samples were taken from 20 root canals using sterile paper points which were immediately placed into the VMGA III transport medium. A total of 220 isolated strains, previously identified by biochemical methods, were submitted to DNA extraction, 16S rRNA gene amplification and sequencing. Ten out of the 20 samples collected were also subjected to the clonal analysis using electrocompetent Escherichia coli DH5?. The nucleotides sequences obtained were compared with the GenBank database from National Center of Biotechnology Information through the BLAST. Thirty-four different bacteria were identified biochemically and 57 by 16S rRNA sequencing, in an average of 6 species per root canal. Sequencing allowed the identification of 97% of isolates against 70.5% identified biochemically. There was an agreement of 49% between the biochemical and 16S rRNA gene sequencing identification. Strains not identified biochemically (65/220) were characterized in 97% (63/65) by sequencing. The most frequently identified bacteria by sequencing were Prevotella spp., Pseudoramibacter alactolyticus, Parvimonas micra, Dialister invisus, Filifactor alocis and Peptostreptococcus stomatis. A total of 689 clones were analyzed and 76 phylotypes identified, of which 48 (63.15%) were different species and 28 (36.84%) were taxa reported as-yet-uncultivable or as yet-uncharacterized species. Prevotella spp., Fusobacterium nucleatum, Filifactor alocis and Peptostreptococcus stomatis, were the most frequently detected species, followed by Dialister invisus, Parvimonas micra, Phocaeicola abscessus, Porphyromonas spp. and the uncharacterized Lachnospiraceae oral clone. No specie was detected in all studied samples and some species were identified in only one case. Culture-independent methods shown that endodontic microbiota was underestimated in culture studies. Although some species predominate in acute primary endodontic infections, it was concluded that this infection is microbiologically heterogeneous, characterized by a wide diversity in which anaerobic gram-negatives are most frequently, and that the association of conventional and molecular approaches allow a better understanding of these microorganisms
Doutorado
Endodontia
Doutora em Clínica Odontológica
Silva, Fabrício Rutz da 1976. "Periapical status and quality of root fillings in elderly populations = a sistematic review = Condição periapical e qualidade das obturações de canais em idosos: uma revisão sistemática." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290799.
Повний текст джерелаDissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: O aumento da longevidade humana faz com que estudos envolvendo indivíduos idosos tenham grande importância para os gestores e profissionais de serviços de saúde. O objetivo desse estudo foi avaliar a relação entre a qualidade das obturações dos canais radiculares e a presença de lesão apical em pacientes idosos. Os dados foram obtidos por meio de uma revisão sistemática de estudos que avaliaram a qualidade das obturações dos canais radiculares e sua relação com a saúde periapical. Os critérios de inclusão foram: a) estudos em humanos; b) amostra incluindo indivíduos com idade igual ou maior que 60 anos; c) definição de critérios claros e bem estabelecidos para a avaliação da qualidade das obturações endodônticas; d) definição de critérios claros e bem estabelecidos para a avaliação da saúde periapical; e) estabelecimento de relação entre a qualidade dos tratamentos endodônticos e a presença de lesões periapicais; f) artigos publicados em Inglês entre 01 janeiro de 1986 e 01 julho de 2013 nas bases de dados PubMed e ISI Web of Knowledge. A pesquisa produziu um total de 1.376 títulos de artigos potencialmente relevantes, dos quais 667 eram repetidos e 16 eram duplicados. Os resumos de 693 estudos foram lidos, sendo 608 destes excluídos e 85 selecionados para análise de texto completo. Catorze (14) artigos foram incluídos. Os resultados desta revisão mostraram que existem vários critérios para avaliação da qualidade das obturações dos canais radiculares e da saúde periapical, o que dificulta a comparação entre os estudos. Além dessas variáveis, as mudanças anatômicas causadas pelo envelhecimento, a presença de lesões no momento da obturação, o interstício de tempo para a avaliação do Peri ápice, o tipo de radiografia utilizada para avalição da qualidade das obturações e da saúde periapical e a falta de padronização na realização dos tratamentos endodônticos foram outros fatores identificados. A saúde do Peri ápice, representada pela frequência de periodontite apical, está intimamente relacionada à qualidade das obturações dos canais radiculares em pacientes idosos.
Abstract: The increase in human longevity causes that studies involving elderly individuals have great importance for managers and professionals of health services. The aim of this study was to evaluate the relationship between the quality of root canals (RC) and the presence of apical periodontitis in elderly patients. The data were obtained by a systematic review of studies that evaluated the quality of root canals and its relation with apical health. Inclusion criteria were: a) studies in humans; (b) sample including individuals with 60 years or older; (c) definition of clear criteria and well established for the evaluation of the quality of the root canals; (d) definition of clear criteria and well established for the evaluation of apical health; e) establishment of a relation between the quality of root canals and the presence of apical periodontitis; f) articles published in English from 1986 (January, 1st) to 2013 (July, 1st) in PubMed and ISI Web of Knowledge databases. The search produced a total of 1,376 potentially relevant titles of articles, of which 667 were repeated and 16 were duplicates. The summaries of 693 studies were read, being 608 of these excluded and 85 selected for analysis of full text. Fourteen articles were included. The results of this review showed that there were several criteria for assessing the quality of root canal obturations and the apical health, which makes the comparison between the studies. In addition to these variables, the anatomic changes caused by aging, the presence of lesions at the time of the closures, the interstice of time for the assessment of apical periodontitis, the type of radiography used for evaluation the quality of root canal obturations and apical periodontitis, and the lack of standardization of the endodontic treatments were other factors identified. The apical health, represented by the frequency of apical periodontitis, is intimately related to the quality of root canal obturations in elderly patients.
Mestrado
Odontologia em Saude Coletiva
Mestre em Odontologia em Saúde Coletiva
Lang, Pauline Mastella. "Perfil de resistência a agentes antimicrobianos de bactérias anaeróbias isoladas de infecções endodônticas agudas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/170697.
Повний текст джерелаThe present thesis aimed to analyze the antimicrobial resistance profile of bacteria isolated from acute endodontic infections through a systematic review and meta-analysis (Chapter 1); to identify and determine the genotypic diversity, antimicrobial susceptibility and virulence factors of isolated facultative anaerobes in isolates from acute apical abscess (Chapter 2); and to provide information for dentist and patients generated from guidelines on the use of antibiotic agents in acute endodontic infections (Chapter 3). The electronic databases and the gray literature were searched up to May 2015 for systematic review. PRISMA guidelines were followed. The clinical studies in of humans that have evaluated the antimicrobial resistance of the isolates of primary acute endodontic infections through laboratorial methods were included. A random effect meta-analysis was employed, and the outcome was described as being the pooled resistance rates for each antimicrobial agent. The data from 7 studies were extracted. The resistance rates for 15 different antimicrobial agents were evaluated, ranging from 3.5% to 40.0%. Lower resistance rates were observed for amoxicillin+clavulanate and amoxicillin, and higher resistant rates were detected for tetracycline. In Chapter 2, root canal samples were collected from seven teeth. Facultative anaerobic bacteria were identified by phenotypic methods and MALDI-TOF MS. Antimicrobial susceptibility of strains was determined to benzylpenicillin, erythromycin and clindamycin by disk-diffusion. Facultative anaerobic bacteria were isolated from 3 teeth. Streptococcus spp., Staphylococcus aureus, Enterococcus faecalis, and Actinomyces viscosus were found. Streptococcus spp. and S. aureus were susceptible to benzylpenicillin. E. faecalis strains (n=24) isolated from the same patients had their susceptibility determined by minimum inhibitory concentration of benzylpenicillin, amoxicillin and amoxicillin + clavulanate using the E-test. The genotypic diversity and virulence factors (ace, asa, gelE, efaA, cylA, esp) were analyzed in E. faecalis strains by PFGE and PCR, respectively. Phenotypic expression of gelatinase and cytolysin were tested. Biofilm production was quantified. All the E. faecalis strains were susceptible to β-lactam antibiotics. The same chromosomal DNA fragmentation profile was revealed to E. faecalis strains isolated. The gelE, ace and efaA genes were detected in 18 E. faecalis strains. Gelatinase expression and biofilm production were observed. E. faecalis strains had the same chromosomal DNA profile, but showed virulence profiles different. In Chapter 3, two sugestion for information texts were presented. The first aims to guide dentists on the proper use of systemic antibiotics in endodontics. The second aims to inform patients about the use of antibiotics and clarify possible doubts.
Ferreira, Luciana Gonçalves Valente. "Análise imuno-histoquímica e por imunofluorescência da expressão da interleucina 17 em abscessos e granulomas periapicais." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/23/23141/tde-12082014-181910/.
Повний текст джерелаPeriapical abscess and periapical granulomas are considered inflammatory lesions related to dental infections originated from pulpal and periodontal tissues. There is little information about the role of interleukin 17 (IL-17) on these lesions. IL-17 is a cytokine pertaining to a new class of immunological response termed Th17. Th17 response has been characterized by the IL-17 release by CD4+ lymphocytes and has been associated to stabilization and perpetuation of the inflammatory process, as well as to neutrophil recruitment. The present study focused on the investigation of the IL-17 expression in periapical abscess and periapical granuloma, in order to verify if there are differences between the lesions that could be related to level of neutrophil infiltrate. Immunohistochemical tests to IL-17, CD4 and CD8 (to identify different lymphocyte population) and elastase (to detect neutrophils) were performed in the periapical abscess (n=25) and granuloma (n=25) biopsies, selected from the collection of Surgical Pathology Service of the Department of Oral Pathology FOUSP. Percentage of the labeling area showing positive expression was obtained for the all cited markers. Counting of CD4+/IL17+ and CD8+/IL7+ cells detected by immunofluorescence was also performed. Friedman´s and Mann-Whitney non-parametric statistical tests were applied for the labeling area percentages in order to detect the significant differences between abscess and granuloma. Spearman´s correlation test was adopted to verify whether there was a correlation between IL-17 and the other markers. In the periapical abscess biopsies, elastase, IL-17, and CD8 were intensively labeled, with area percentage significantly higher than that observed for CD4 (p<0.0001). By the Spearman correlation test, there was significant positive correlation between IL-17 and CD8 (rs = 0.5944, p=0.0415), but not between IL-17 and elastase, and IL-17 and CD4. In the double staining by immunofluorescence there was significantly more CD4+/IL17+ cells than CD8+/IL17+ cells (p=0.0250). In the periapical granulomas, CD4 labeling area percentage was significantly higher than those for elastase (p=0.0055), CD8 (p=0.0200), and IL-17 (p=0.0210). There was significant positive correlation between IL-17 and elastase (rs = 0.5604, p=0.0463), but not between IL-17 and the other markers. The most frequent double staining cells were CD4+/IL17+ cells in the comparison with CD8+/IL17+ cells (p=0.0114). In conclusion, IL-17 labeling area percentage is higher in the abscess than in the granuloma; in the granulomatous lesions the IL-17 expression is directly proportional to the neutrophil infiltration. These results may indicate that the Th17 response participates to the acute phase of the apical inflammatory process. Although there were significant differences regarding the predominant T lymphocytes types, the co-expression of IL-17 and CD4 in the both inflammatory processes may suggest that this CD4+ lymphocytes are the main responsible for IL-17 release in the analyzed periapical lesions.
Santini, Manuela Favarin. "Comparação entre duas associações de analgésicos não opioides e opioides no controle da dor do abscesso dentoalveolar agudo em evolução : um ensaio clínico randomizado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/116478.
Повний текст джерелаAim: To evaluate the management of pain in Endodontics by two studies: Article 1 - a randomized clinical trial comparing the analgesic efficacy of two opioids and non-opioid associations in the pain control of Acute Dentoalveolar Abscess (ADA); Article 2 - a systematic review investigating the efficacy and safety of analgesic therapy in the management endodontic pain.Methodology: The Article 1 included 24 patients that looked for emergency treatment in a university dental clinic. These patients were divided into two groups: Co / Pa - prescription of codeine (30 mg) + acetaminophen (500 mg) oral, every 4 h, during 3 days; Tr / Ac - prescription of tramadol hydrochloride (37.5 mg) + acetaminophen (500 mg) as the previous group. Pain scores were recorded by the patient at 6, 12, 24, 48, and 72 h after treatment, in a pain diary, using the Visual Analogue Scale (VAS). The Article 2 was conducted in electronic databases, gray literature, and references of retrieved articles to analyze randomized clinical trials or systematic reviews with or without meta-analysis. One arms of the therapy should have comprised an anti-inflammatory or analgesic drugs, orally administered by adults, in order to control moderate to severe pain, measured by Visual Analogue Scale, cause by endodontic problems . Data were collected regarding the characteristics of the sample, scores of pretreatment pain, characteristics of compared groups, methodological quality aspects, additional analgesic use, and frequency of adverse events. Descriptive and inferential analyzes were performed. Results: In Article 1, in both groups there was a reduction in the pain scores over time. For Co/Ac group, it was found a significant reduction in the scores at 12, 24, 48, and 72 hours after treatment (P <0.05). The scores at 48 and 72 hours were lower, compared to immediate treatment and scores at 6 hours after treatment (P <0.05). In the Tr/ Ac group, the scores decreased as the time is increasing (P <0.05). For all time intervals tested, the groups were not significantly different (P> 0.05). Both treatments were effective in controlling pain caused by ADA. The association Tr/ Ac presented itself less secure. In Article 2, a total of 431 references and 419 abstracts were reviewed, then only 14 articles were read in full. From these articles it was excluded 5 and 9 trials met the inclusion criteria. These studies compared acetaminophen, NSAIDs (ibuprofen, flurbiprofen, ketorolac tromethamine, etodolac, and tenoxicam), prednisolone, and analgesic tramadol associations for treating moderate to severe endodontic pain. It was observed that drugs were administered before or after endodontic therapy. In 8 studies, the control group was placebo and 8 studies used single dose regimen to assess pain control. In all clinical trials, the primary outcome analyzed was the reduction of scores in pain and secondary outcomes were the utilization of additional medication and adverse reactions. It was possible to establish a significant relationship between use of additional analgesics and periapical diagnosis. When the administration occurred before the endodontic procedure no adverse events were observed. When it was administered after the procedure, adverse reactions were reported in 2 of 3 trials included in the analysis. Conclusion: The Article 1 suggests that, considering analgesic efficacy and safety function, the association codeine/ acetaminophen is more effective for the control moderate to severe pain, at the treatment of ADA in evolution. The Article 2 found that there is a lack of RCTs in Endodontics using the same methodological standard to define a systemic treatment protocol of endodontic pain.
ALMEIDA, Elvia Christina Barros de. "Análise de Polimorfismos dos Genes Hbd-1, Mbl-2, Il-6 E Tnf-α em Pacientes com Alterações Pulpares e Perirradiculares". Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/10356.
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A imunidade inata e a imunidade adaptativa são ferramentas fundamentais de resposta do sistema imune contra a invasão microbiana. O objetivo deste trabalho foi avaliar a presença de polimorfismos nos genes da Beta-defensina-1 (hBD-1), da Lectina de Ligação da Manose 2 (MBL-2), da Interleucina 6 (IL-6) e do Fator de Necrose Tumoral - alfa (TNF-α) em pacientes portadores de alterações pulpares e perirradiculares. Foram incluídos no estudo 73 pacientes, sendo divididos em 4 grupos: 13 pacientes com Pulpite Irreversível, 12 pacientes com Abscesso Periapical Agudo, 23 pacientes com Periodontite Apical Crônica e 25 pacientes sem tratamento endodôntico realizado (Grupo Controle). Foi realizada a coleta de sangue dos pacientes e extração do DNA das amostras. A genotipagem dos Polimorfismos de Único Nucleotídeo dos genes da hBD-1, da MBL-2, da IL-6 e do TNF-α foi realizada através da Técnica de Reação em Cadeia de Polimerase em tempo real (qPCR). Os resultados demonstraram que os indivíduos com o genótipo IL-6 GC possuem 5% menos chance de não ter o quadro clínico de Periodontite Apical Crônica (p = 0,0113). Conclui-se que o genótipo IL-6 (-174G/C) GG mostrou-se associado ao desenvolvimento de alterações perirradiculares crônicas na população estudada. Os Polimorfismos dos genes da hBD1(-44C/G), MBL-2 (codons 52, 54 e 57) e TNF-α (-308) não se mostraram associados ao desenvolvimento de alterações perirradiculares na população estudada. Esta pesquisa sugere que fatores genéticos possam estar relacionados com a susceptibilidade para desenvolver alterações perirradiculares.
Sánchez, Franco Karina Milagros. "Cirugía periapical en dientes monorradiculares con lesión endoperiodontal y absceso periodontal." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2013. https://hdl.handle.net/20.500.12672/14740.
Повний текст джерелаEl documento digital no refiere asesor
Muestra la elección del procedimiento quirúrgico de cirugía periapical en los casos de dientes monorradiculares con lesión endoperiodontal y absceso periodontal para lograr la regeneración de los tejidos periapicales adyacentes. En pacientes que acudieron a la clínica de postgrado de la facultad de odontología de la Universidad Nacional Mayor de San Marcos, donde era decisiva la intervención.
Trabajo académico
González, Ana Julieta. "Reparación apical posterior al tratamiento endodóntico." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Odontología, 2015. http://bdigital.uncu.edu.ar/9950.
Повний текст джерелаFil: González, Ana Julieta. Universidad Nacional de Cuyo. Facultad de Odontología.
Giménez, Diego S. "Abordaje quirúrgico del tercio apical." Trabajo final de especialización, Universidad Nacional de Cuyo. Facultad de Odontología, 2020. http://bdigital.uncu.edu.ar/15350.
Повний текст джерелаFil: Giménez, Diego S.. Universidad Nacional de Cuyo. Facultad de Odontología.
Sousa, Ezilmara Leonor Rolim de. "Estudo bacteriologico de canais radiculares associados a abcessos periapicais." [s.n.], 2000. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290483.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
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Resumo: Canais radiculares infectados tipicamente abrigam uma microbiota mista, composta principalmente por espécies anaeróbias. O papel das bactérias e seus subprodutos no desenvolvimento e perpetuação das infecções endodônticas já está bem estabelecido. Pesquisas têm sido realizadas para correlacionar a presença de bactérias em canais radiculares infectados com sinais e sintomas clínicos. A proposta do presente estudo foi investigar a composição da microbiota de canais radiculares infectados, associados a abscessos periapicais, e a possível correlação entre espécies bacterianas específicas com as fases dos abscessos, além de realizar testes de sensibilidade antimicrobiana das bactérias isoladas. As amostras microbiológica foram coletadas de 30 canais radiculares usando pontas de papel estéreis, transportadas em VMGA, diluídas, plaqueadas e incubadas em câmara de anaerobiose. Colônias microbianas foram isoladas, caracterizadas e identificadas por métodos padronizados. Cento e dezessete bactérias foram encontradas, sendo 75 (64,1 %) anaeróbias estritas. Uma ou mais (máximo de 10) espécies bacterianas foram encontradas em 29 (96,6%) canais radiculares infectados associados a abscessos periapicais, confirmando a característica polimicrobiana das infecções endodônticas. As bactérias anaeróbias mais freqüentemente isoladas foram: Peptostreptococcus prevotii (43,3%), Peptostreptococcus micros (30%), Fusobacterium necrophorum (23,3%). Embora menos freqüentes, bactérias facultativas como Gemella morbillorum (30%) e Streptococcus mitis (20%) também foram encontradas. Contudo, a análise estatística não encontrou relação entre presença dos abscessos periapicais com qualquer das espécies bacterianas identificadas (p>0,05). As espécies mais prevalentes Peptostreptococcus prevotii e Fusobacterium necrophorum foram testadas quanto à suscetibilidade antimicrobiana através do método do Etest, utilizando os seguintes antibióticos: benzilpenicilina, amoxicilina, amoxicilina + ácido clavulânico, metronidazol e clindamicina. Ps. prevotii e F. necrophorum apresentaram-se sensíveis a todos os antibióticos testados. Apesar da ausência de significância estatística, nossos resultados indicaram predominância de bactérias anaeróbias Gram-positivas e a presença de microbiota mista nos canais radiculares infectados associados a abscessos periapicais. Os testes de suscetibilidade antimicrobiana revelaram a presença de sensibilidade bacteriana entre as espécies Peptostreptococcus prevotii e Fusobacterium necrophorum aos antibióticos benzilpenicilina, amoxicilina, amoxicilina + ácido clavulânico, metronidazol e clindamicina
Abstract: Infected dental root canais typically harbour a mixed flora, including many anaerobic species. The role of these microorganisms and their by-products in the development and perpetuation of pulp and periapical diseases has already been well established. Efforts have been made in order to correlate bacteria present in infected dental root canais to clinical signs and symptoms. The present study was outlined to identify microorganisms present in root canais associated to periapical a bscesses , the correlation specific bacteria species with the phases of this inflammatory acute process, signs and symtoms and, to test the susceptibility of this microbiota to antibiotics. Microbiological samples were collected from 30 root canais using sterile paper points, transported in VMGA and diluted, plated and incubated in an anaerobic chamber. Microbial colonies were then purified, characterised and identified by established methods. One hundred seven different bacterial species were recovered, being 75 (64.1 %) strict anaerobes or microphilic species. One or more (maximum of 10) bacterial species were recovered from 29 (96.6%) root canais, showing the polymicrobial characteristic of dental infections. The anaerobes most frequently isolated were: Peptostreptococcus prevotii (43.3%), Peptostreptococcus micros (30%), Fusobacterium necrophorum (23.3%). Although less frequent, facultative bacteria as Gemella morbillorum (30%) e Streptococcus mitis (20%) were also found. However, statistical analysis by a Pearson X2 test or a one-sided Fisher's exact test did not find statistical relationship between any bacterial specie identified and the presence of periapical abscesses (p>0.05). Antibiotic sensitivity of Peptostreptococcus prevotii e Fusobacterium necrophorum was accomplished with the E-test System. These bacterial isolates were tested for their susceptibility/resistance to benzylpenicilin, amoxiciln, amoxicilin combined with clavulanate and clindamycin. The species Peptostreptococcus prevotii and Fusobacterium necrophorum were susceptible to ali tested antibiotics. In spite of the lack of statistical significance, our results indicated predominance of Gram-positive anaerobic bacteria at the mixed microflora present in dental root canais associated with periapical abscesses. Antibiotic susceptibility data showed Peptostreptococcus prevotii and Fusobacterium necrophorum susceptibility to ali tested antibiotics
Mestrado
Endodontia
Mestre em Clínica Odontológica
Soto, Cepeda Fernanda Carolina. "Presencia de metaloproteinasa de matriz extracelular-12 (MMP-12) :Asociación con la respuesta reparativa en los tejidos perirradiculares postmedicación intracanal en los dientes con periodontitis apical asintomática." Tesis, Universidad de Chile, 2012. http://www.repositorio.uchile.cl/handle/2250/114577.
Повний текст джерелаAutor no autoriza el acceso a texto complete de su tesis en el programa de tesis Electrónicas
Introducción: La periodontitis apical asintomática (PAa) consiste en la inflamación y destrucción del tejido periodontal apical. Es causada por el encuentro dinámico entre agentes etiológicos de origen endodóntico y la respuesta inmune del hospedero. La metaloproteinasa de matriz extracelular-12 (MMP-12) también conocida como metalo-elastasa de macrófagos es una enzima clave para la migración de los macrófagos y para la degradación de componentes de la matriz extracelular (MEC), por lo que la MMP-12 podría participar en la patogénesis de las lesiones periapicales (LPAs) y su caracterización en el exudado periapical podría reflejar el estado de salud/ enfermedad de los tejidos perirradiculares. El objetivo de este estudio es comparar y cuantificar las formas enzimáticas y moleculares de MMP-12 en el exudado periapical de dientes con PAa antes del tratamiento y después de medicarlos por 7 días con Hidróxido de Calcio (Ca (OH) ). Materiales y métodos: Se seleccionaron pacientes con diagnóstico clínico de PAa en dientes unicanaliculares (n=9). Se obtuvieron muestras de exudado periapical antes de la preparación quimiomecánica y el mismo procedimiento se repitió 7 días después; período en el cual el canal se mantuvo medicado con Ca (OH) 2 . Para determinar la presencia de MMP-12 se realizó inmunowestern blot. La intensidad de las bandas se midió por análisis densitométrico con el programa UN SCAN IT ®. 2 Resultados: Se observó presencia de MMP-12 en exudado periapical de dientes con PAa antes de la medicación con Ca (OH) como después de ésta, presentándose una tendencia a la disminución después de medicación con Ca(OH) 2 2 aunque no existió diferencia significativa. Conclusiones: MMP-12 podría estar asociada a la patogenia de la PAa, siendo necesario aumentar el número de muestras (n) para validar la tendencia a su disminución post medicación con Ca(OH)2 y encontrar un resultado significativo.
Codes, Alejandro. "Periodontitis apical persistente." Trabajo final de especialización, Universidad Nacional de Cuyo. Facultad de Odontología, 2020. http://bdigital.uncu.edu.ar/15166.
Повний текст джерелаFil: Codes, Alejandro. Universidad Nacional de Cuyo. Facultad de Odontología.
Ledezma, Rojas Paulina Constanza. "Presencia y niveles de metaloproteinasa de matriz extracelular-14 (MMP-14) en dientes con periodontitis apical asintomática, absceso apical agudo y en lesiones periapicales." Tesis, Universidad de Chile, 2013. http://www.repositorio.uchile.cl/handle/2250/117230.
Повний текст джерелаAutor no autoriza el acceso a texto completo de su tesis en el Portal de Tesis Electrónicas
Introducción: Las patologías periapicales de origen endodóntico se describen como un transtorno inflamatorio de los tejidos perirradiculares, causado por la infección microbiana persistente dentro del sistema de canales radiculares (SCR). Entre éstas podemos encontrar la periodontitis apical asintomática (PAA) y el absceso apical agudo (AAA), los cuales se caracterizan por la destrucción de los tejidos periapicales en presencia de mediadores inflamatorios. La metaloproteinasa de matriz extracelular-14 (MMP-14) es una enzima clave para la migración de macrófagos y para la degradación catabólica de la matriz extracelular (MEC), por lo que MMP-14 podría participar en la patogénesis de las lesiones periapicales (LPAs) y su caracterización en el exudado periapical (EP) podría reflejar el estado salud/ enfermedad de los tejidos perirradiculares. El objetivo de este estudio es identificar y comparar los niveles de las formas enzimáticas y moleculares de MMP-14, en homogeneizados de LPAs de dientes con PAA y de ligamento periodontal (LP) de dientes sanos; y en el EP de dientes con PAA y AAA. Materiales y Métodos: Se incluyeron 23 sujetos con diagnóstico clínico de PAA e indicación de exodoncia y 18 sujetos con diagnóstico clínico de ligamento periodontal sano e indicación de exodoncia por ortodoncia. Adicionalmente se incluyeron sujetos con diagnóstico clínico de PAA (n=10) y AAA(n=10) en dientes uniradiculares a los cuales se les realizó el tratamiento endodóntico correspondiente. Se obtuvieron muestras de exudado periapical antes de la preparación quimiomecánica. Para determinar la presencia de MMP-14 se realizó inmuno western blot. La intensidad de bandas se midió por análisis densitométrico con el programa UN SCAN IT®. Resultados: Se detectó la presencia de MMP-14 en homogeneizados de LPAs de dientes con PAA y también en el grupo control, presentando una tendencia a ser mayores sus niveles en LPAs. Así mismo se detectó la presencia de MMP-14 en EP de dientes con PAA y AAA, siendo mayores sus niveles en presencia de AAA. Conclusiones: MMP-14 tendría un rol en la patogenia de estas enfermedades sobre todo en los procesos agudos que desencadenan la aparición del AAA.
Montagner, Francisco. "Comunidades microbianas em canais radiculares e abscessos periapicais agudos e suscetibilidade de algumas bacterias anaerobias estritas isoladas." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290464.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-15T18:25:56Z (GMT). No. of bitstreams: 1 Montagner_Francisco_D.pdf: 4116912 bytes, checksum: 44ab64d774aeca67726f61c5f7590f94 (MD5) Previous issue date: 2010
Resumo: Os objetivos do presente estudo foram caracterizar as comunidades microbianas presentes em canais radiculares (CR) com necrose pulpar e abscessos periapicais agudos (APA) de amostras pareadas, e determinar in vitro a suscetibilidade antimicrobiana de bactérias anaeróbias estritas isoladas através do método de E-test. Coletas microbiológicas de 20 CR e 20 amostras de exsudatos de APA dos mesmos pacientes foram processadas e caracterizadas empregando-se métodos de análise do polimorfismo do fragmento terminal de restrição (APFTR), cultura microbiana e testes bioquímicos, PCR e Nested-PCR. Os dados foram analisados estatisticamente, de acordo com suas características. Amostras de CR e APA não diferiram no número de microrganismos ou diversidade de suas comunidades quando avaliadas através da técnica de APFTR. Poucas espécies foram detectadas simultaneamente nos ecossistemas correlacionados. Nenhuma espécie foi detectada em todas as amostras, e a maioria foi detectada em apenas uma amostra. A técnica da cultura microbiana demonstrou predomínio de anaeróbios estritos pertencentes ao gênero Prevotella spp. e às espécies Parvimonas micra, Gemella morbillorum e Bacteroides ureolyticus em ambos ecossistemas. As espécies Porphyromonas endodontalis, Prevotella nigrescens, Filifactor alocis, T. socranskii e T. denticola foram freqüentemente detectados nos CR e APA, através do PCR ou Nested-PCR. E. faecalis foi detectado em CR em uma única amostra. Em 45% dos casos, observou-se a presença de ao menos uma cepa resistente a um ou mais agentes antimicrobianos testados. Amoxicilina, amoxicilina + ácido clavulânico e penicilina G foram os antibióticos mais efetivos, enquanto que maiores níveis de resistência foram observados para eritromicina e azitromicina. As cepas isoladas dos APA demonstraram valores inferiores de CIM quando comparadas àquelas isoladas em CR, exceto para a penicilina G. Comunidades microbianas com perfis heterogêneos foram observadas em amostras de canais radiculares e abscessos periapicais, de um mesmo paciente. Os microrganismos isolados em ambos os ecossistemas revelaram padrões não similares de suscetibilidade aos agentes antimicrobianos mais prescritos em Endodontia.
Abstract: The aim of this study was to examine the profile of microbial communities in necrotic root canals (RC) and acute periradicular abscesses (AP) in paired samples. The antimicrobial susceptibility was determined with E-test for strict anaerobes. Paired samples of RC and PA exudates were collected from 20 subjects and analyzed by terminal restriction fragment length polymorphism (t-RFLP), microbial culture, PCR, and Nested-PCR. Statistical analysis was performed. RC and PA were not different in the number of species or in the community diversity, however very few species were shared between the two communities. No single t-RF fragment was detected in all samples, and the majority was detected in only one sample. Strict anaerobes were frequently isolated in RC and PA samples, comprising the genus Prevotella spp., and the species Parvimonas micra, Gemella morbillorum e Bacteroides ureolyticus species. Porphyromonas endodontalis, Prevotella nigrescens, Filifactor alocis, T. socranskii e T. denticola were frequently detected in the RC and PA. Only one RC sample harbored E. faecalis which was detected with molecular methods. The E-test showed that at least one resistant strain was isolated from 45% of the subjects. Amoxicilin, amoxicilin + clavulanic acid and penicilin-G were the most effective antimicrobial agents, and high resistance levels were observed for erythromicin and azithromicin. PA isolates had lower MIC than RC strains, except for pennicilin-G. In conclusion, the microbial profiles of the RC and PA communities are distinct and diverged between all subjects. The heterogeneous profiles RC and PA produced microbial interactions that affected the susceptibility to the most frequently prescribed antimicrobial agents in Endodontics.
Doutorado
Endodontia
Doutor em Clínica Odontológica
Sousa, Ezilmara Leonor Rolim de. "Analise microbiologica de canais radiculares associados a abscessos periapicais e a suscetibilidade de bacterias anaerobias prevalentes frente a diversos antibioticos." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290478.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-02T20:01:54Z (GMT). No. of bitstreams: 1 Sousa_EzilmaraLeonorRolimde_D.pdf: 6699561 bytes, checksum: a7e05e747b868e98926396a2a1fc5d99 (MD5) Previous issue date: 2003
Resumo: O objetivo deste estudo foi investigar a composição da microbiota de canais radiculares infectados associados a abscessos periapicais; analisar a correlação entre espécies bacterianas específicas com a localização clínica dos abscessos periapicais, sinais e sintomas e testar a suscetibilidade de bactérias anaeróbias estritas prevalentes. As amostras microbiológicas foram coletadas de 60 canais radiculares usando pontas de papel estéreis, transportadas em RTF, diluídas, plaqueadas e incubadas em câmara de anaerobiose. Colônias microbianas foram isoladas, caracterizadas e identificadas por métodos padronizados. Das 287 diferentes espécies bacterianas, 201 eram anaeróbias estritas. Uma ou mais (máximo de 14) espécies bacterianas foram recuperadas de 59 (98,3%) canais radiculares, confirmando a característica polimicrobiana das infecções endodônticas. As bactérias anaeróbias estritas mais freqüentemente isoladas foram: Peptostreptococcus prevotii (22/60), Peptostreptococcus micros (19/60), Fusobacterium necrophorum (19/60). Embora menos freqüentes, bactérias facultativas como Gemella morbillorum (19/60), Streptococcus mitis (13/60), e Streptococcus sanguis (11/60)também foram encontradas. O teste de Pearson ou teste exato de Fisher mostrou que houve relação positiva de algumas espécies bacterianas com a localização do abscesso periapical, bem como, com alguns sinais e sintomas de origem endodôntica (p<0,05). Os resultados indicaram predominância de bactérias anaeróbias Gram-positivas e a presença de microbiota mista nos canais radiculares infectados associados a abscessos periapicais. O método do E-test revelou sensibilidade bacteriana das espécies testadas aos antibióticos benzilpenicilina, amoxicilina, amoxicilinalclavulanato de potássio, metronidazol, clindamicina e cefaclor, contudo, certos microrganismos foram resistentes a azitromicina e eritromicina. Enquanto que, nenhum dos microrganismos testados produziu 'beta¿-lactamase
Abstract: The aim of this study was to investigate the composition of the microbiota of infected root canaIs associated with periapical abscesses, to investigate the correlation of specific species of bacteria with the clinical localization of the periapical abscesses, signs, and symptoms, and to test the susceptibility of prevalent strict anaerobic bacteria isolated. Microbiological samples were collected from 60 root canals using sterile paper points, transported in RTF and diluted, plated and incubated in an anaerobic chamber. Microbial colonies were then purified, characterized and identified by established methods. Of the 287 different bacterial species recovered, 201 were strict anaerobes or microphilic species. One or more (maximum of 14) bacterial species were recovered from 59 (98.3%) root canals, showing the polymicrobial characteristic of endodontic infections. The most frequently strict anaerobes isolated were: Peptostreptococcus prevotii (22/60), Peptostreptococcus micros (19/60), Fusobacterium necrophorum (19/60). Although less frequent, facultative bacteria such as Gemella morbillorum (19/60), Streptococcus mitis (13/60), and Streptococcus sanguis (11/60) were also found. The Pearson X 'POT. 2¿ test or Fisher's exat test showed positive relationship among some bacterial species and the localization of periapical abscesses as well as with some endodontic signs and symptoms (p<0.05). Results indicated predominance of Gram-positive anaerobic bacteria in the mixed microbiota of dental root canals associated with periapical abscesses. The E-test revealed bacterial susceptibility to benzylpenicillin, amoxicillin, amoxicillin/potassium clavulanate, clindamycin and cefaclor. All microorganisms tested did not produce 'beta¿-lactamase
Doutorado
Endodontia
Doutor em Clínica Odontológica
Montagner, Francisco. "Identificação microbiologica em dentes com necrose pulpar e abscessos periapicais e a suscetibilidade antimicrobiana de algumas bacterias anaerobias isoladas." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290465.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-13T00:24:34Z (GMT). No. of bitstreams: 1 Montagner_Francisco_M.pdf: 40440080 bytes, checksum: 91c7e1c3b65d68cb2d0c5c34049c40ea (MD5) Previous issue date: 2009
Resumo: Os objetivos do presente estudo foram analisar a microbiota endodôntica em dentes que se apresentavam com necrose pulpar e abscesso periapical; investigar a presença de enterococos, fungos e enterobactérias na saliva e nos canais radiculares; e, determinar in vitro a suscetibilidade antimicrobiana de bactérias anaeróbias estritas isoladas com método de E-test e produção de _-Lactamases. Coletas microbiológicas de 30 canais radiculares e 30 amostras de saliva dos mesmos pacientes foram processadas e identificadas empregando-se métodos de cultura microbiana e testes bioquímicos. Análise estatística foi realizada através dos testes Qui-quadrado de Pearson ou de Fisher. Dos 159 microrganismos isolados nos canais radiculares, predominaram anaeróbios estritos e bactérias Gram-positivas, sendo Peptostreptococcus micros a espécie mais freqüentemente isolada. Fungos, enterobactérias e enterococos foram pouco isolados dos canais radiculares, sendo mais freqüentemente observados em amostras de saliva. Associações de espécies e sinais e sintomas de origem endodôntica foram encontrados. Penicilina G, amoxicilina, amoxicilina + ácido clavulânico, metronidazol foram bastante efetivos frente aos microrganismos testados. Todas as cepas de P. buccae, P. intermedia/nigrescens, P. disiens, P. micros e P. propionicum foram sensíveis à amoxicilina e ao metronidazol. F. nucleatum demonstrou ser bastante resistente aos antibióticos lactâmicos. Observou-se proporção variável de cepas capazes de produzir lactamases. Os resultados sugerem que a infecção endodôntica primária associada a casos sintomáticos é mista, com predomínio de anaeróbios estritos. A presença de fungos, enterococos e enterobactérias não foi significativa tanto nos canais radiculares quanto nas amostras de saliva. Os antibióticos testados mostraram-se efetivos, no entanto resistência microbiana foi detectada em taxas variáveis de acordo com a espécie estudada.
Abstract: The aim of the present study was to analyze the endodontic microbiota of teeth with pulp necrosis and spontaneous pain; detect the presence of enterococci, fungi and enteric bacteria in saliva and root canals; and, to determine, in vitro the antimicrobial sensitivity of anaerobic isolates by E-test and _-lactamasis production. Thirty samples were collected from both root canals and saliva, and processed using strict microbiological techniques. Statistical analysis was performed with Persons X2 test or Fisher's Exact Test, as appropriated. A hundred and fifty nine strains were isolated from the root canals, with a predominance of strict anaerobes and gram-positive bacteria, and Peptostreptococcus micros was the most frequently isolated species. Fungi, enterobacteria and enterococci were seldom found in root canals. There were no Enterobacteria in both places. Positive associations between specific species and signs and symptoms of endodontic origin were present. Penicillin G, amoxicillin, amoxicilin + clavulanate, and metronidazole were effective against the tested microorganisms. All strains of P. buccae, P. intermedia/nigrescens, P. disiens, P. micros e P. propionicum were susceptible to amoxicillin and metronidazole. About 12% to 33% of the isolates were able to produce beta-lactamasis. The present results suggested that the primary endodontic infection in symptomatic teeth was mixed, and was predominantly formed by strict anaerobic strains. Fungi, enterococci and enterobacteria were not significantly found in root canals and saliva. The tested antibiotics were effective, however resistance was detected in several clinical isolates.
Mestrado
Endodontia
Mestre em Clínica Odontológica
Radebe, Nonhlanhla. "Diabetes mellitus and oral health: a comparison between diabetic and non-diabetic subjects." Thesis, 2009. http://hdl.handle.net/11394/3430.
Повний текст джерелаDiabetes is often associated with a number of medical complications as a result of the metabolic changes taking place systemically. There is considerable evidence it is associated with oral complications including among others, gingivitis, periodontal disease, xerostomia, oral candidiasis, dental caries, periapical abscesses, lichen planus,burning mouth syndrome and an altered taste sensation (Lamster et al. 2008; Skamagas et al. 2008; Vernillo, 2003). The aim of the present study was to compare the oral health status in diabetic and non-diabetic patients with regards to their oral health problems, oral pathology and self perceived quality of life.A comparative cross-sectional study to determine the common oral complications prevalent in diabetics and non-diabetics was carried out in KwaZulu-Natal, at Prince Mshiyeni Memorial, EThekwini District, Umlazi. The study sample consisted of 150 diabetic patients and 150 non-diabetic patients attending the hospital. The oral health status was assessed clinically for each patient and recorded prior to the interview. The DMFT, plaque index and appearance of marginal gingiva were used to assess oral health status. An intra-oral examination was carried out to identify oral pathology lesions and other oral problems. Patients were then interviewed on the self perceived quality of life and the impact that diabetes has had on their lives. Plaque Index and DMFT were significantly higher among the diabetic group as opposed to the non-diabetic group. Periodontal disease was observed in more than half of the diabetic group as opposed to only 14.7% of the non-diabetic group. Except for tooth decay, the diabetic patients had more oral health problems compared to the non-diabetic group. More than half of the diabetic group reported having xerostomia compared to only 7.3% of the non-diabetic group. Altered taste sensation was also more prevalent in the diabetic group. In general, the diabetic group demonstrated a higher prevalence of oral pathology lesions and medical diabetes complications compared to the non-diabetic group.The self perceived quality of life was said to have deteriorated in 92% of diabetic subjects due to concomitant diabetic complications and 75% of this group indicated that they were not satisfied with their current quality of life.Diabetic patients were significantly less likely to perceive their quality of life as very satisfied after having adjusted for age and gender variables (OR=0.0188; CI: 0.0059-0.0594). Furthermore, diabetic patients were almost 6 times more likely to perceive themselves as “not satisfied” with their quality of life (QOL) as compared to non-diabetic patients.Individuals with diabetes exhibited poorer oral health when compared to non-diabetics.They exhibited a higher DMFT and had a significantly higher average number of missing teeth compared to the non-diabetic group. Special care needs to be given to diabetic patients because of the associated complications to improve their quality of life. A more detailed and in-depth study that utilises a diabetes-specific quality of life instrument may provide a more accurate way of determining the quality of life as well as periodontal disease in patients.