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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Evaluation of traumatized immature teeth treated with two pulp revascularization proposals = Avaliação de dentes traumatizados com rizogênese incompleta submetidos a duas propostas de revascularização pulpar / Avaliação de dentes traumatizados com rizogênese incompleta submetidos a duas propostas de revascularização pulpar

Nagata, Juliana Yuri, 1986- 06 October 2013 (has links)
Orientadores: Adriana de Jesus Soares, Brenda Paula Figueiredo de Almeida Gomes / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-22T21:23:22Z (GMT). No. of bitstreams: 1 Nagata_JulianaYuri_D.pdf: 1885757 bytes, checksum: 6a26b8beb223d63399f25d6cc087da55 (MD5) Previous issue date: 2013 / Resumo: O presente trabalho teve como objetivos: avaliar os resultados clínicos e radiográficos da utilização da pasta tripla antibiótica e do hidróxido de cálcio associado à clorexidina gel 2% para a revascularização pulpar (capítulo 1); avaliar a redução microbiana da descontaminação realizada com pasta tripla antibiótica e à base de hidróxido de cálcio e clorexidina gel 2% na revascularização pulpar, e identificar espécies microbianas por Reação em Cadeia da Polimerase (PCR) (capítulo 2); relatar dois casos clínicos de dentes reimplantados com rizogênese incompleta onde foi proposto o protocolo de revascularização pulpar (capítulo 3). Material e Métodos: Treze pacientes (7-17 anos de idade) com incisivos superiores necrosados devido a trauma dental foram divididos em dois grupos: grupo medicado com pasta tripla antibiótica (TAP) (n=7) e grupo medicado com a associação de hidróxido de cálcio e clorexidina gel 2% (CHP) (n=6). Os pacientes foram acompanhados por um período de 9 a 19 meses com avaliação dos dados clínicos e radiográficos (capítulo 1). Quinze pacientes (7-17 anos de idade) apresentando dentes imaturos foram tratados com revascularização pulpar e divididos em grupo TAP (n=7) e grupo CHP (n=8). As amostras microbianas foram coletadas inicialmente e após cada etapa de descontaminação dos canais radiculares. As bactérias cultiváveis foram contadas e identificadas por meio de PCR (capítulo 2). Dois pacientes (7 e 8 anos) foram acometidos por avulsão dentária no incisivo central superior esquerdo e no incisivo lateral superior esquerdo, respectivamente. Os dentes foram submetidos à revascularização pulpar consistindo de descontaminação passiva (hipoclorito de sódio 6%, solução fisiológica e clorexidina 2%), e medicação intracanal (hidróxido de cálcio e clorexidina gel 2%) por 21 dias. Na segunda sessão, a formação de coágulo sanguíneo foi estimulada e uma barreira de Agregado Trióxido Mineral (MTA) foi inserida (capítulo 3). Resultados: No capítulo 1, os dois grupos demonstraram completa redução da sintomatologia clínica, entretanto, escurecimento coronário foi observado em 6(85.71%) dentes do grupo TAP. Radiograficamente, todos os dentes do grupo TAP demonstraram reparo de lesão periapical, e apenas um dente do grupo CHP não demonstrou reparo periapical. Fechamento apical foi observado em 5(71,42%) dentes do grupo TAP e em 4(66.67%) dentes do grupo CHP. No capítulo 2, ambos os grupos apresentaram redução na contagem microbiana (UFC/mL) significativa entre a amostra inicial e após irrigação com NaOCl 6% (p<0.05). A utilização das medicações intracanais (grupos TAP ou CHP) não diferiu com relação às contagens de CFU/mL (p=0.95). A espécie bacteriana mais prevalente foi Actinomyces naeslundii (66,67%). Uma média de 2,13 espécies por canal foi encontrada. No capítulo 3, o primeiro caso apresentou fechamento apical e calcificação do terço apical do espaço do canal radicular no controle de 16 meses. O segundo caso demonstrou reabsorção radicular progressiva, sendo tratado com apicificação. Conclusões: A revascularização pulpar pode ser uma alternativa de tratamento para dentes acometidos por luxações traumáticas leves com rizogênese incompleta. Tanto a pasta tripla antibiótica quanto o hidróxido de cálcio associado a clorexidina gel 2% sugerem redução de sinais clínicos, radiográficos e redução microbiana na revascularização pulpar / Abstract: This study aims to: evaluate clinical and radiographic outcomes of the use of triple antibiotic paste and calcium hydroxide associated to 2% chlorhexidine gel paste for pulp revascularization therapy (chapter 1); evaluate microbial reduction of pulp revascularization performed with triple antibiotic paste and calcium hydroxide associated to 2% chlorhexidine gel, and identify bacteria species using Polymerase Chain Reaction (PCR) (chapter 2); report two clinical cases of immature replanted teeth which were treated with a protocol of pulp revascularization (chapter 3). Methods: Thirteen patients (7-17 years-old) with necrotic upper incisors due to dental trauma were divided in two groups: group treated with triple antibiotic paste (TAP) (n=7) and group dressed with the association of calcium hydroxide and 2% chlorhexidine gel (CHP) (n=6). Patients were followed-up for till 9 to 19 months, with evaluation of clinical and radiographic data (chapter 1). Fifteen patients (7-17 years-old) presenting immature teeth were treated with revascularization and divided in group TAP (n=7) and group CHP (n=8). Samples were taken initially and after each step of root canal decontamination. Cultivable bacteria recovered at the five stages were counted and identified by means of PCR assay (chapter 2). Two patients (7 and 8 years old) suffered tooth avulsion on maxillary left lateral incisor and on maxillary left central incisor, respectively. Treatment consisted of revascularization therapy using passive decontamination (6% sodium hypochlorite, 2% chlorhexidine and sterile saline) and intracanal medication (calcium hydroxide and 2% chlorhexidine gel) for 21 days. In the second session, blood clot was stimulated and Aggregate Trioxide Mineral was used as a cervical barrier of the canal (chapter 3). Results: In chapter 1, clinical evaluation in both groups (TAP and CHP) observed that there was complete reduction concerning clinical symptomatology, however, crown discoloration was observed in 6(85.71%) teeth of group TAP. In radiographic exam, all teeth of group TAP showed repair of periapical lesions, and only one tooth of group CHP did not show apical repair. Apical closure was observed in 5(71.42%) teeth of group TAP and in 4(66.67%) teeth of group CHP. In chapter 2, both groups presented bacteria counts (CFU/mL) decreasing significantly after irrigation with 6% NaOCl (p<0.05). Intracanal dressing did not differ in relation to CFU counts (p=0.95). The most prevalent bacteria identified were Actinomyces naeslundii (66.67%). An average of 2.13 species per canal was found. In chapter 3, it was observed apical closure and calcification in the apical third of root canal space at the 16-month follow-up. The second case presented progressive root resorption, being treated with apexification. Conclusions: Pulp revascularization may be an alternative of treatment for mild luxated traumatized immature teeth. Both triple antibiotic paste and calcium hydroxide associated to 2% chlorhexidine gel paste may be employed in pulp revascularization suggesting clinical, radiographic and microbial reduction after their use / Doutorado / Endodontia / Doutora em Clínica Odontológica
12

Avaliação das sequelas clínicas e radiográficas em dentes traumatizados : estudo retrospectivo / Evaluation of clinical and radiographic sequelae in traumatized teeth : a retrospective study

Lima, Thiago Farias Rocha, 1985- 12 April 2012 (has links)
Orientador: Adriana de Jesus Soares / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-21T21:20:42Z (GMT). No. of bitstreams: 1 Lima_ThiagoFariasRocha_M.pdf: 1395193 bytes, checksum: 68c9957191a99a53eb7dcfb425e7aee7 (MD5) Previous issue date: 2012 / Resumo: O objetivo do presente estudo foi avaliar, por meio de análise clínica e radiográfica, as principais sequelas de dentes luxados e reimplantados, e verificar o reparo periapical e periodontal após o tratamento dos dentes traumatizados. Foram avaliados 83 pacientes, que apresentaram 180 dentes traumatizados, dos quais 67 foram acometidos por luxação extrusiva, 69 por luxação lateral, 10 por intrusão e 34 dentes sofreram avulsão seguida de reimplante. Os pacientes foram avaliados no Serviço de Traumatismos Dentários da FOP-UNICAMP, Área de Endodontia, no período de 2007 a 2011, e preservados por um período mínimo de um ano. As sequelas verificadas foram: calcificação pulpar, necrose e reabsorções radiculares (inflamatórias e por substituição). O tratamento endodôntico foi realizado nos casos onde foi diagnosticada a necrose e a presença de reabsorções radiculares. Após o tratamento, avaliou-se o reparo periapical e periodontal dessas complicações. Os resultados revelaram que a necrose pulpar foi a principal sequela, ocorrendo em 147 dentes (82.7%). Houve diferença estatística quanto à prevalência de necrose entre os 4 tipos de traumatismos (p<0,0001/Teste Exato de Fisher), sendo que nas luxações intrusivas e nos reimplantes dentários todos os dentes apresentaram ausência de vitalidade. A reabsorção inflamatória foi verificada em 20.5% dos casos e a reabsorção por substituição foi mais frequente nos reimplantes dentários (94.1%), apresentando diferença estatística em relação às luxações dentárias (p<0,0001/ Teste Exato de Fisher). Nos casos que foram submetidos ao tratamento, observou-se que houve redução na porcentagem de todos os sinais e sintomas clínicos observados inicialmente e, radiograficamente, verificou-se redução significativa das áreas de radioluscências periapicais e reabsorções inflamatórias. Conclui-se que a necrose pulpar e as reabsorções radiculares foram as principais sequelas encontradas após luxações e reimplantes dentários, entretanto, quando diagnosticadas e tratadas precocemente, a maioria dessas complicações pode ser reparada, favorecendo o prognóstico dos dentes traumatizados / Abstract: The aim of this study was to evaluate, through clinical and radiographic analysis, the sequelae involving luxated and replanted teeth, as well as to assess the periapical and periodontal healing after the endodontic treatment of the traumatized teeth. This study included 83 patients who presented with dental traumas such as extrusive luxation (n=67), lateral luxation (n=69), intrusion (n=10), and avulsion followed by replantation (n=34). Patients were evaluated at the Dental Trauma Center of the Dental School of Piracicaba, Sate University of Campinas, SP, Brazil and followed for minimally 1 year. The sequelae assessed were pulp calcification and necrosis and root resorption. Endodontic treatment was provided for the patients diagnosed with pulp necrosis and root resorption. After the endodontic treatment, the periodontal and periapical healing was assessed. Pulp necrosis was the major sequel, affecting 147 teeth (82.7%). In the cases involving intrusive luxation and tooth replantation, necrosis occurred in all teeth. Statistical difference was observed for necrosis among the four types of trauma assessed (p<0.0001 - Fisher's exact test). Inflammatory resorption was observed in 20.5% of the cases and replacement resorption was more frequent in replanted teeth (94.1%). Clinical analysis revealed a reduction in the signs and symptoms concerning all the dental traumas in the subjects who underwent endodontic treatment. Radiographic images showed a significant decrease in periapical lesions and inflammatory resorption. In conclusion, pulp necrosis and root resorption were the main sequelae detected after dental replantation and luxation; however, when diagnosed and treated early, these complications might be repaired, improving the prognosis of the traumatized teeth / Mestrado / Endodontia / Mestre em Clínica Odontológica
13

Comparação da força de mordida pré e pós tratamento endodôntico em molares inferiores com periodontite apical assintomática / Comparison of bite force pre and post endodontic treatment in lower molar with asymptomatic periodontitis

Anacleto, Felipe Nogueira, 1983- 03 October 2015 (has links)
Orientador: Caio Cezar Randi Ferraz / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-26T21:48:03Z (GMT). No. of bitstreams: 1 Anacleto_FelipeNogueira_M.pdf: 1773545 bytes, checksum: c2db927cede9fb1831811991d3b70d9b (MD5) Previous issue date: 2015 / Resumo: Tão importante quanto a avaliação pulpar, o diagnóstico periapical dos dentes com necessidade de tratamento endodôntico, é realizado por testes com resultados imprecisos, inquantificáveis e de difícil validação. Portanto, o objetivo deste trabalho foi comparar a força de mordida (FM) pré e pós-operatória em molares inferiores com periodontite apical assintomática. Foram avaliados 31 pacientes (20 mulheres e 11 homens), o dente incluído foi mensurado quanto a força de mordida (FM) registrada em Newton(N) com o medidor de força oclusal Occlusal Force-Meter GM10 e também seu representante contralateral. O tratamento foi realizado em duas sessões, na primeira o dente foi acessado, descontaminado por técnica crown down, a odontometria realizada por um localizador apical Root ZX II (J. Morita, Japão). O comprimento de trabalho adotado foi 1mm aquém do forame apical com patência e a substância química auxiliar foi o hipoclorito de sódio 6%, o preparo mecânico foi realizado com sistema rotatório Protaper® Universal (Dentsply, EUA) e os dentes foram medicados com hidróxido de cálcio e soro fisiológico por 07 dias. Na segunda sessão o dente foi novamente acessado, a medicação removida, o dente obturado com guta percha e restaurado definitivamente com resina composta. As avaliações de força de mordida pós operatória foram feitas com 48 horas e 7 dias pós obturação. Os valores foram comparados por análise estatística ANOVA e teste t Tuckey (?= 0.05) com os resultados dos dentes contralaterais. Os resultados apresentaram diferença estatística do grupo teste com o grupo contralateral na avaliação inicial da FM e na avaliação da FM 48 horas pós obturação. Conclui-se que os dentes tratados tiveram nas primeiras 48 horas redução da força de mordida, porém com 7 dias de finalização do tratamento os valores da FM se restabelecem comparados com os dentes contralaterais / Abstract: As important as the pulp evaluation, the diagnosis of periapical teeth recquiring endodontic treatment is done by testing with inaccurate results, unquantifiable and difficult validation. Therefore, the aim of this study was to compare pre and postoperative bite force (BF) in mandibular molars with asymptomatic apical periodontitis. 31 patients were evaluated (20 females and 11 males), the included tooth as well as its contralateral representative bite force (BF) were measured and recorded in Newton (N) using an occlusal force meter (Occlusal Force-Meter GM10). The treatment was performed in two sessions, in the first one, the tooth was accessed, decontaminated by crown down tecnique, odontometry performed by an apex locator Root ZX II (J. Morita, Japan). The adopted working length was 1 mm short of the apical foramen with patency and the auxiliary chemical substance was 6% sodium hypochlorite, the mechanical preparation was performed using Protaper® Universal rotary system (Dentsply, USA) and the teeth were filled with calcium hydroxide and saline by 07 days. In the second session the tooth was again accessed, medication removed, the tooth filled with gutta percha and definitely restored with composite resin The postoperative bite force evaluations were made 48 hours and 7 days post obturation. The values were compared by ANOVA and Tukey Student's t test (? = 0.05), with the contralateral teeth results. The results showed statistical difference of the test group compared to the contralateral group at baseline BF and at BF 48 hours after obturation evaluations. It is concluded that the treated teeth had an operative sensitivity within 48 hours with reduced bite force, but in 7 days of completion of the treatment the BF values were restored compared to the contralateral teeth / Mestrado / Endodontia / Mestre em Clínica Odontológica
14

The effects of concentration and treatment time on the residual antibacterial properties of DAP

Jenks, Daniel Brent January 2016 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) Endodontic Regeneration Graduate Endodontic Department / Introduction: Regenerative endodontic procedures are used to treat immature teeth with pulpal necrosis in order to control infection, enable continued root development and enhance formation of a pulp like tissue in the canal. Canal disinfection is an integral part the regenerative endodontic process. Double antibiotic paste (DAP; i.e., equal parts of ciprofloxacin and metronidazole) has been successfully used for canal disinfection in regenerative endodontics. A comparison of the residual antibacterial effect of dentin treated with various dilutions of DAP pastes on biofilm formation has not yet been investigated thoroughly. Objectives: The aims of this in-vitro study were to investigate how concentration and time of treatment affect the residual antibacterial properties of DAP in preventing E. faecalis biofilm formation on human dentin. Materials and Methods: Extracted human teeth were used to obtain 4x4mm radicular dentin specimens. Each specimen was pretreated for 1 or 4 weeks with the 77 clinically used concentration of DAP (500 mg/mL), low concentrations of DAP (1, 5 or 50 mg/mL) loaded into a methylcellulose system, calcium hydroxide (Ca(OH)2), or placebo paste. After treatment, samples were rinsed and placed in sterile phosphate buffered saline (PBS) for three weeks. Samples were then inoculated with cultured E. faecalis and incubated in anaerobic conditions for three weeks to allow mature biofilm formation. The dentin samples were rinsed and biofilms detached. The detached biofilm cells were then diluted and spirally plated for enumeration on blood agar plates. The plates were then incubated for 24 h and the number of CFUs/mL was determined using an automated colony counter. Data was analyzed using Fisher’s Exact and Wilcoxon rank sum tests were used for statistical comparisons (α=0.05). Results: Dentin pretreatment for 4 weeks with 5, 50 or 500 mg/mL of DAP demonstrated significantly higher residual antibacterial effects and complete eradication of E. faecalis biofilms in comparison to a 1 week pretreatment with similar concentrations. However, dentin pretreated with 1 mg/mL of DAP or Ca(OH)2 did not provide a substantial residual antibacterial effect regardless of the application time. Conclusion: Dentin treated with 500, 50, or 5 mg/mL of DAP for 4 weeks was able to completely prevent the colonization of bacterial biofilm. Four-week treatment of dentin with DAP offers superior residual antibacterial effect in comparison to a one-week treatment. Intracanal application of DAP for 4 weeks during endodontic regeneration may offer an extended residual antibacterial effect.
15

The Longevity of Residual Antibacterial Effect of Dentin Treated with Various Concentrations of Triple Antibiotic Paste

Alyas, Sarmad Mazin January 2016 (has links)
Indiana University School of Dentistry Department of Endodontics / Introduction: Triple antibiotic paste (TAP, 1000 mg/ml) is composed of equal portions of ciprofloxacin, metronidazole and minocycline and is used as an intracanal dressing to disinfect the infected immature root canal during endodontic regeneration procedures. Lower concentrations of TAP have been recommended to minimize detrimental effects on pulp stem cells. TAP can be retained within the dentin matrix and its continual release confers an antibacterial effect to the dentin. Objective: The aim of this in vitro study was to investigate the residual antibacterial effect of dentin treated with various concentrations of TAP loaded into a gel system. Materials and Methods: Radicular dentin slabs were prepared from human teeth after obtaining IRB approval. The slabs were sterilized and treated with methylcellulose-based TAP of 100 mg/mL, 10 mg/mL, 1 mg/mL, 1.5% NaOCl, placebo paste with no TAP, or a positive control group with pure 1000 mg/mL TAP. Samples in each group were treated with the assigned TAP concentration for three weeks or immersed in 1.5% NaOCl for five minutes (n =18 per group). All samples were then irrigated with sterile water followed by 17% EDTA and incubated in phosphate buffered saline for either 2 or 4 weeks. Samples were then inoculated with Enterococcus faecalis and incubated for an additional 3 weeks. Biofilm formed on each sample was then dislodged and spiral plated to evaluate the bacterial colony-forming units. Data were analyzed using Fisher’s Exact tests and Wilcoxon rank sum tests (α = 0.05). Results: Dentin treated with 10, 100, or 1000 mg/mL of TAP demonstrated significant residual antibacterial effects up to four weeks. However, only 100 mg/mL TAP was able to completely prevent bacterial colonization after four weeks. No considerable residual antibacterial effect was observed in dentin treated with placebo gel, 1 mg/ml TAP or 1.5% NaOCl. Conclusion: At least 10 mg/mL of TAP loaded into a methylcellulose system is required to achieve a substantial residual antibacterial effect for four weeks.
16

AvaliaÃÃo do efeito antibacteriano da medicaÃÃo intracanal à base de hidrÃxido de cÃlcio associado ou nÃo à clorexidina 1% no tratamento de dentes necrosados apÃs trauma / Antibacterial effect evaluation of calcium hydroxide with or without chlorhexidine like intracanal medication in the treatment of necrotic teeth after trauma

Mirela Andrade Campos 23 September 2010 (has links)
Tem-se como objetivo desta dissertaÃÃo estudar o hipoclorito de sÃdio e a clorexidina como soluÃÃes irrigadoras, atravÃs de uma revisÃo de literatura, e avaliar e quantificar, por meio de cultura bacteriana, o efeito antibacteriano do preparo biomecÃnico e de pasta à base de hidrÃxido de cÃlcio associada ou nÃo a clorexidina 1 % sobre bactÃrias presentes em canais radiculares de dentes permanentes necrosados apÃs trauma, bem como verificar a presenÃa dos microorganismos Fusobacterium nucleatum e bacilo pigmentado negro (BPN) nestes dentes. A amostra consistiu de 13 dentes, totalizando 11 pacientes. As amostras microbiolÃgicas foram coletadas apÃs a abertura coronÃria (A1), depois do preparo biomecÃnico (A2), seguido da utilizaÃÃo do curativo de demora (A3) e 72h de procedida à remoÃÃo da medicaÃÃo intracanal (A4). As amostras foram coletadas introduzindo-se sequencialmente trÃs cones de papel absorvente estÃril no interior do canal radicular por um minuto. Em A1, 100% das amostras foram positivas para presenÃa de bactÃrias, sendo a mÃdia de Unidades Formadoras de ColÃnias (UFC) de 7.7 x 104. Na segunda coleta (A2), apenas 5/13 amostras foram positivas, com mÃdia de UFCs de 1.7 x 103. ApÃs o uso da medicaÃÃo intracanal (A3), 4/13 amostras foram positivas, com mÃdia de 3.3 x 103 UFCs. Em A4, 6/13 amostras foram positivas, com mÃdia de 1 x 104 UFCs. Entre A1 x A2, A1 x A3 e A1 x A4, observou-se uma reduÃÃo de UFCs estatisticamente significante (p<0.001). NÃo se pÃde observar diferenÃa estatisticamente significante (p>0.05) entre as demais amostras. Conclui-se que o preparo quÃmico-mecÃnico desempenha sua funÃÃo antibacteriana ao reduzir significativamente o nÃmero de micro-organismos do canal principal, porÃm o hidrÃxido de cÃlcio e sua associaÃÃo com clorexidina 1% nÃo tiveram diferenÃa estatÃstica significante, possuindo um efeito antibacteriano limitado, nÃo sendo capazes de prevenir o crescimento de bactÃrias apÃs seu uso como medicaÃÃo intracanal. / The goals of this dissertation are study of sodium hypochlorite and chlorhexidine as irrigants, through a literature review, evaluate and quantify, by means of bacterial culture, the antibacterial effect of biomechanical preparation and pulp-based hydroxide calcium with or without 1% chlorhexidine on bacteria in root canals of permanent teeth after necrotic injury, as well as verifying the presence of microorganisms Fusobacterium nucleatum and Black Pigmented Bacillus in these teeth. The sample consisted of 13 teeth, totaling 11 patients. Microbiological samples were taken after the coronal opening (A1), after root canal preparation (A2), followed by the use of intracanal dressing (A3) and 72 hours of the removal of the medication (A4). The samples were collected sequentially introducing three sterile absorbent paper cones inside the root canal for one minute. In A1, 100% of samples were positive, and the average colony forming units (CFU) of 7.7 x 104. In the second collection (A2), 5 / 13 samples were positive, with an average of 1.7 x 103 CFUs. After use of the medication (A3), 4 / 13 samples were positive, averaging 3.3 x 103 CFUs. A4, 6 / 13 samples were positive, with an average of 1 x 104 CFUs. Between A1 x A2, A3 and A1 x A1 x A4, we observed a reduction of CFUs was statistically significant (p <0.001). We were unable to observe a statistically significant difference (p> 0.05) among the other samples. We conclude that chemo-mechanical performs its antibacterial function by significantly reducing the number of micro-organisms from the main channel, but calcium hydroxide and its association with chlorhexidine 1% had no statistically significant difference, having an antibacterial effect limited not being able to prevent bacterial growth after its use as an intracanal medication.
17

Efeitos da ampliação do forame apical no procedimento de revitalização do canal radicular em dentes de caes com ápices completamente formados (histológico em dentes com polpa vital e com necrose pulpar) / Effect of Apical Foramen Enlargment in the Root Canal Revitalization Procedure in Dogs' Teeth With Complete Formed Apex (Histologic in Teeth With vital Pulp and With Necrotic Pulp

Marion, Jefferson José de Carvalho, 1971- 24 August 2018 (has links)
Orientador: Francisco José de Souza Filho / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-24T03:24:26Z (GMT). No. of bitstreams: 1 Marion_JeffersonJosedeCarvalho_D.pdf: 27665945 bytes, checksum: 849cd1484ec134422fbd4351ca11630e (MD5) Previous issue date: 2013 / Resumo: O tratamento por meio de revitalização do canal radicular tem sido considerado para dentes com rizogênese incompleta e polpa necrosada. A revitalização do canal radicular compreende a descontaminação do canal e o preenchimento do mesmo com coágulo visando a invaginação do espaço do canal com tecido conjuntivo e consequente revitalização do espaço pulpar desvitalizado. O objetivo deste estudo foi analisar histologicamente os efeitos da ampliação do forame apical no procedimento de revitalização do canal radicular em dentes de cães, com polpa vital ou necrosada, e com ápices completamente formados. Foram utilizados 2 cães da raça Beagle, que foram divididos em 5 grupos: G.1 - necrose pulpar com coágulo sanguíneo; G.2 - necrose pulpar com medicação intracanal (associação de Ca(OH)2 com CLX gel 2%); G.3 - controle positivo polpa vital com coágulo sanguíneo; G.4 - controle positivo polpa vital com medicação intracanal (associação de Ca(OH)2 com CLX gel 2%); G.5 - controle negativo - canais radiculares com lesões apicais induzidas. Para a indução de necrose pulpar e desenvolvimento das lesões periapicais, os dentes foram mantidos abertos para contaminação dos canais radiculares pelo período de 180 dias. Os canais foram tratados pela técnica crown-down e os forames apicais ampliados até a lima K #40. Os resultados demonstraram que no grupo G.1 houve revitalização do canal radicular, total ou parcial, em 63,6% dos dentes. No grupo G.2 em 77,8% dos casos houve revitalização parcial ou total do canal radicular. No grupo G.3 houve revitalização do canal radicular, parcial ou total, em 100% dos casos. No grupo G4 não houve revitalização do canal radicular em 100% dos casos (houve selamento biológico apical). No grupo G.5 em 100% dos casos houve formação de lesão periapical. Desta forma, pode se concluir que a revitalização do canal radicular em dentes com necrose pulpar ocorreu em maior percentual no grupo com medicação intracanal, enquanto que, nos dentes com polpa vital a revitalização do canal radicular ocorreu em maior porcentagem no grupo com coágulo / Abstract: Treatment through revitalization of the root canal has been considered for teeth with incomplete root formation and necrotic pulp. The revitalization of root canal includes canal decontamination and filling with clot aiming the invagination of canal space with connective tissue and consequent revitalization of the devitalized pulp space. The aim of this study was to histologically analyze the effects of apical foramen enlargement in root canal revitalization procedure in dogs' teeth, with vital or necrotic pulp, with completely formed apices. Two Beagle dogs were divided into 5 groups: G.1 - pulp necrosis with blood clot; G.2 - pulp necrosis with intracanal medication (association of Ca(OH)2 with 2% chlorhexidine gel); G.3 - positive control vital pulp with blood clot; G.4 - positive control vital pulp with intracanal medication (association of Ca(OH)2 with 2% chlorhexidine gel); G.5 - negative control - root canals with induced apical lesions. For induction of pulp necrosis and periapical lesion development, the teeth were kept open to root canals contamination for a period of 180 days. The root canals were treated by crown-down technique and apical foramen was enlarged to #40 K file. The results showed that in G.1 group there was root canal revitalization, partial or total, in 63.6% of teeth. In G.2 group, partial or complete root canal revitalization occurred in 77.8% of cases. In G.3 group, partial or total revitalization of root canals occurred in 100% of cases. In G.4 there was no revitalization of the root canal in 100% of cases (there were biological apical sealing). In the group G.5, in 100% of cases there was formation of apical lesions. Therefore, it can be concluded that the revitalization of the root canal in teeth with pulp necrosis occurred in higher percentage in the group with intracanal medication, whereas in teeth with vital pulp, revitalization root canal occurred in higher percentage in the group with clot / Doutorado / Endodontia / Doutor em Clínica Odontológica
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The antibacterial effects of radiopaque double antibiotic pastes against clinical bacterial isolates from mature and immature teeth with necrotic pulps

Ibrahim, Carolin Francis January 2018 (has links)
Low concentrations (1-10mg/mL) of double antibiotic paste (DAP) have demonstrated antibacterial properties in regenerative endodontics. The aim of this study was to evaluate if DAP made radiopaque (RoDAP) with barium sulfate has antibacterial effects against bacterial isolates from a mature and immature tooth with necrotic pulp. Clinical bacterial isolates were obtained from the canals of mature and immature teeth with necrotic pulps during root canal therapy or a regenerative procedure, respectively. Bacterial isolates were grown anaerobically for three weeks on 4x4mm dentin specimens prepared from extracted human teeth (n=48 per biofilm type). The dentin specimens were allocated into six groups and treated as follows: 1mg/mL RoDAP, 10mg/mL RoDAP, calcium hydroxide (UltraCal), placebo (barium sulfate in methylcellulose), no treatment, and no bacteria or treatment (sterile control). After one week of treatment the biofilm was detached and biofilm disruption assays were conducted to determine the bacterial numbers (CFUs/mL). The data was analyzed using Wilcoxon Rank Sum tests followed by pairwise comparisons. 1 and 10 mg/mL RoDAP as well as calcium hydroxide demonstrated significant antibacterial effects against the tested bacterial isolates. The placebo paste did not demonstrate any significant antibacterial effects. No significant difference in antibacterial effects was found against isolates from both mature and immature teeth regardless of the type of treatment. Both 1 and 10 mg/mL RoDAP demonstrated significant antibacterial effects against bacterial isolates from mature and immature teeth with necrotic pulps. RoDAP can be beneficial clinically since its adequate placement within the canal system can be confirmed radiographically.
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Endodontic complications in vital teeth restored with composite resins: a systematic review

Amjad, Shwan January 2013 (has links)
Syftet med den här systematiska litteraturöversikten var att ta reda på om vitala tänder restaurerade med kompositmaterial har högre risk för att utveckla endodontiska komplikationer över tid såsom apikal parodontit eller smärta i jämförelse med tänder som restaurerats med andra dentala fyllningsmaterial som amalgam. Komposit används ofta som ett fyllningsmaterial och även om man studerat kompositers påverkan på t.ex. pulpaceller och funnit att det inte är helt oskadligt är det oklart om materialet faktiskt påverkar pulpan och leder till endodontiska komplikationer. Genomförandet av systematiska litteraturöversikten omfattade (i) formulering av frågeställning, (ii) konstruktion och genomförande av litteratursökning med (iii) tolkning och värdering av den identifierade litteraturen. Den initiala sökningen i databasen PubMed gav 938 publikationer som granskades oberoende av tre personer. Efter ytterligare sökningar kvarstod totalt tio studier som inkluderades i den systematiska litteraturöversikten. Alla inkluderade studier bedömdes ha ett lågt bevisvärde vilket ledde till att ingen konklusion med evidensgrad kunde ges. De inkluderade studierna rapporterar få, om ens några, endodontiska komplikationer och få eller inga skillnader rapporterades vid tänder restaurerade med komposit jämfört med amalgam. Fler väl genomförda studier med ett stort antal patienter krävs för att svara på frågan om tänder restaurerade med kompositmaterial har högre risk för att utveckla endodontiska komplikationer i jämförelse med andra dentala fyllningsmaterial.
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Periodontite apical induzida em cães: efeito do tratamento endodôntico. Estudo microbiológico, tomográfico e de microscopia confocal

Zapata, Ronald Ordinola 05 November 2009 (has links)
Este trabalho teve o objetivo de avaliar a capacidade da bactéria Enterococcus faecalis em induzir periodontite apical no modelo experimental canino; verificar se o preparo químico-mecânico afeta a sobrevivência dessa bactéria no sistema de canais radiculares e avaliar o reparo desses dentes por meio de radiografia periapical e tomografia computadorizada cone beam. Dentes com e sem tratamento endodôntico foram avaliados por meio de microscopia confocal de varredura a laser. Para tal, foram utilizados 2 cães. A bactéria Enterococcus faecalis foi inoculada nos canais de 4 pré-molares superiores, 11 prémolares inferiores e 9 incisivos superiores. As câmaras pulpares foram seladas e, após 60 dias, os canais das raízes distais dos pré-molares e de 7 incisivos superiores foram submetidos a tratamento endodôntico em sessão única e os canais das raízes mesiais dos pré-molares e 2 incisivos superiores foram deixados sem tratamento (controle). Amostras microbiológicas foram feitas antes e após o preparo químico-mecânico. O reparo foi avaliado após 6 meses do tratamento mediante radiografias periapicais e por tomografia computadorizada cone beam. A comparação entre as imagens obtidas após o período experimental pelos 2 métodos foi feita por medições da área em mm2 de cada lesão encontrada, utilizando o software ImageTool Os resultados mostraram que a presença de periodontite apical crônica foi verificada em todos os dentes inoculados, independentemente da colonização pela bactéria Enterococcus faecalis ou pela flora mista. O preparo químico-mecânico reduziu significativamente o número de bactérias no interior dos canais radiculares (p<0.05). Os resultados radiográficos e tomográficos demonstraram lesões de menor diâmetro nos dentes tratados endodonticamente em comparação ao grupo controle (p<0.05). A comparação entre os métodos demonstrou diferença estatística entre eles sendo evidenciada áreas radiolúcidas maiores utilizando a tomografia cone beam em comparação com a radiografia periapical (p<0.05). Concluiu-se que a bactéria Enterococcus faecalis induziu periodontite apical crônica similarmente à flora mista; o tratamento endodôntico reduziu o número de bactérias cultiváveis significativamente embora sem relação com o reparo radiográfico. Os dentes tratados em sessão única apresentavam lesões menores em comparação aos não-tratados e as áreas das lesões observadas na TC cone beam foram maiores do que as áreas encontradas nas radiografias periapicais. A microscopia confocal e o método proposto neste estudo se mostraram eficazes para determinar, qualitativamente, a viabilidade bacteriana e a distribuição de ácidos nucléicos bacterianos dentro dos túbulos dentinários. Houve diferença entre a dentina infectada in vitro com o padrão de infecção in vivo, caracterizada pela presença de biofilmes aderidos à parede do canal radicular. / The aims of this study were to evaluate the Enterococcus faecalis ability to induce apical periodontitis in dogs root canals, to verify the bacterias ability to survive to the cleaning and shaping procedures and to assess the healing of the induced apical periodontitis by periapical radiograph and cone beam computed tomography. Also, endodontically treated and non-treated teeth were evaluated by confocal laser scanning microscope. Two mongrel dogs were used in the experiment. Enterococcus faecalis strain was inoculated into the root canals of 4 maxillary premolars, 11 mandibular premolars and 9 maxillary incisors. After 60 days the root canals of the distal roots of the mandibular and maxillary pre-molars and 7 maxillary incisors were endodontically treated. The premolars mesial root canal and 2 maxillary incisors were used as control (no treatment). Microbiologic samples were done after and before the cleaning and shaping procedure. The healing was evaluated after 6 months by periapical radiographs and cone beam computed tomography. The comparison between obtained images after the experimental period by the two methods was done using measures of the lesion area in mm2 with ImageTool software. The results showed the presence of chronic apical periodontitis in every inoculated teeth, with Enterococcus faecalis or mixed infection. The cleaning and shaping procedures reduced the number of bacteria of the root canals (p<0.05). The radiographic and tomographic results showed the lower diameter lesion in endodontically treated teeth than in the control group (p<0.05). The comparison between the methods showed statistical difference and greater radiolucent areas were evident in cone beam computed tomography images (p<0.05). It is possible to conclude that the bacteria Enterococcus faecalis induced chronic apical periodontitis as well as the mixed microflora; the endodontic treatment reduced the number of cultivable bacteria in a significant way, but with no relation to the radiographic healing. The treated teeth in only one session presented smaller lesions in comparison to the non-treated teeth and the lesions area in cone beam computed tomography were bigger than the areas found in periapical radiograph. The confocal microscopy and the proposed method of this study showed to be efficient to determine the bacterial ability and the distribution of bacterial nucleic acids inside the dentin tubules. There was difference between in vitro infected dentin with the in vivo infection pattern, which presents biofilm attached to the root canal walls.

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