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1.
Braz. dent. j ; 28(6): 710-714, Nov.-Dec. 2017. tab, graf
Article in English | LILACS | ID: biblio-888711

ABSTRACT

Abstract The objective of this study was to evaluate the effect of root canal preparation with single-file reciprocating systems at different working lengths on the development of apical microcracks using micro-computed tomographic (micro-CT) imaging. Forty extracted human mandibular incisors were randomly assigned to 4 groups (n=10) according to the systems and working length used to prepare the root canals: Group A - WaveOne Gold at apical foramen (AF), Group B - WaveOne Gold 1 mm short of the AF (AF-1 mm), Group C - Unicone (AF) and Group D - Unicone (AF-1 mm). Micro-CT scanning was performed before and after root canal preparation at an isotropic resolution of 14 µm. Then, three examiners assessed the cross-sectional images generated to detect microcracks in the apical portion of the roots. Apical microcracks were visualized in 3, 1, 1, and 3 specimens in groups A, B, C, and D, respectively. All these microcracks observed after root canal preparation already existed prior to instrumentation, and no new apical microcrack was detected. For all groups, the number of slices presenting microcracks after root canal preparation was the same as before canal preparation. Root canal preparation with WaveOne Gold and Unicone, regardless of the working length, was not associated with apical microcrack formation.


Resumo O objetivo deste estudo foi avaliar o efeito da instrumentação de canais radiculares utilizando sistemas reciprocantes de lima única em diferentes comprimentos de trabalho sobre o desenvolvimento de microfissuras apicais utilizando imagens de microtomografia computadorizada (micro-CT). Quarenta incisivos inferiores humanos extraídos foram distribuídos aleatoriamente em 4 grupos (n=10) de acordo com os sistemas e comprimentos de trabalho utilizados para preparar os canais radiculares: Grupo A - WaveOne Gold no forame apical (FA), Grupo B - WaveOne Gold 1 mm aquém do FA (FA-1 mm), Grupo C - Unicone (FA) e grupo D - Unicone (FA-1 mm). Escaneamentos de micro-CT foram realizados antes e após o preparo dos canais a uma resolução isotrópica de 14 μm. Em seguida, três examinadores avaliaram as imagens de secção transversal geradas para detectar microfissuras na porção apical das raízes. Microfissuras apicais foram visualizadas em 3, 1, 1 e 3 espécimes nos grupos A, B, C e D, respectivamente. Todas essas microfissuras observadas após o preparo dos canais radiculares já existiam antes da instrumentação e não foi detectada nenhuma nova microfissura apical. Para todos os grupos, o número de cortes apresentando microfissuras após o preparo dos canais radiculares foi o mesmo verificado antes do preparo dos canais. A instrumentação de canais radiculares utilizando WaveOne Gold e Unicone, independentemente do comprimento de trabalho, não foi associada à formação de microfissuras apicais.


Subject(s)
Humans , Tooth Apex/diagnostic imaging , Tooth Fractures/diagnostic imaging , X-Ray Microtomography/methods , Tooth Apex/injuries
2.
Braz. j. oral sci ; 15(2): 119-123, Apr.-June 2016. tab
Article in English | LILACS, BBO | ID: biblio-848191

ABSTRACT

Aim: To determine the prevalence of pulp and periradicular diseases in a Brazilian subpopulation, correlating the prevalence with sex, age and most affected teeth. Methods: Data collected from medical records of patients treated at the Clinic of Specialization in Endodontics of the Federal University of Pernambuco between 2003 and 2010. The following variables were recorded for each patient: sex, age, affected teeth and diagnosed endodontic disease. Using Pearson's chi-square and Fisher's exact tests, the collected data analysis was set at a 5% significance level. Results: From all the treated teeth, 57% were diagnosed with pulp diseases, with the symptomatic irreversible pulpitis being the most prevalent (46.3%), while among the diagnosed periradicular diseases (43%), chronic apical periodontitis was the most prevalent (81%). Pulp diseases were detected in men and women in an unequal mode (p=0.008). Subjects under 40 years old had higher prevalence of pulp disease (p=0.286), and patients over 50 years were most affected by periradicular diseases (p=0.439). Maxillary incisors and mandibular first molars were the most affected teeth by endodontic diseases. Conclusions: In the evaluated subpopulation, the endodontic diseases were more prevalente in the maxillary incisive, affected indiscriminately individuals of different age groups and chronic apical periodontitis was the most prevalent diagnosed disease (Au)


Subject(s)
Humans , Male , Female , Age and Sex Distribution , Chronic Periodontitis/epidemiology , Dental Pulp , Dental Pulp Diseases/epidemiology , Incisor , Periapical Diseases/diagnosis , Periapical Periodontitis/epidemiology , Pulpitis/epidemiology , Radiography, Dental , Dental Pulp Diseases/diagnosis , Endodontics , Periapical Periodontitis/diagnosis , Pulpitis/diagnosis
3.
Odontol. clín.-cient ; 14(1): 579-583, Jan.-Mar. 2015. graf, tab
Article in Portuguese | LILACS | ID: lil-782775

ABSTRACT

Objetivo: Este estudo retrospectivo avaliou a perda dos segundos molares decíduos, por rizólise fisiológica ou patológica, em pacientes atendidos nas Clínicas de Odontopediatria I e II da Universidade Federal de Pernambuco. Foram examinados 112 prontuários, sendo os dados registrados em fichas individuais. Método: Foram analisadas as seguintes variáveis: gênero, faixa etária, tipo de tratamento (invasivo ou não invasivo), tipo de reabsorção dentária (patológica ou fisiológica) e arco dentário. Resultados: A reabsorção fisiológica foi mais frequente que a reabsorção patológica em ambos os arcos. Foi observado que existe associação estatisticamente significante entre a faixa etária de 2 a 4 anos e a reabsorção dentária (p<0,001). A média de idade dos pacientes para reabsorção fisiológica foi de 6,65 e 4,49 anos para a reabsorção patológica dos segundos molares decíduos. Conclusão: Houve perda precoce de segundos molares decíduos. Há grandes possibilidades de comprometimento da oclusão funcional do indivíduo.


Aim: This retrospective study evaluated the loss of the second deciduous molars either by physiological or pathological root resorption in patients enrolled at the Pediatric Dentistry Clinic I and II at the Federal University of Pernambuco. Methods: A review of 112 patient records were assessed and registered in a form. The following variables were analyzed: gender, age, type of treatment (invasive or no invasive), type of resorption (physiological or pathological) and region (maxillary or mandibular). Results: The physiological resorption was more observed than the pathological resorption in both arches. It was noted that there was a statistically significant association between the age group of 2-4 years old and the resorption (p<0.001). The mean age of patients for physiological resorption was 6.65 and 4.49 years old for pathological resorption of the second deciduous molars. Conclusion: It can be concluded that there was an early deciduous second molars loss. There are great possibilities of impaired functional occlusion of the individual.

4.
Braz. j. oral sci ; 12(4): 307-312, Oct.-Dec. 2013. ilus
Article in English | LILACS | ID: lil-701318

ABSTRACT

AIM: Cone beam computed tomography (CBCT) was used to evaluate the ability of three NiTi rotary systems to maintain the original root canal anatomy. METHODS: Sixty mesiobuccal canals of human mandibular first molars were divided into three groups with 20 root canals each. All teeth were scanned by CBCT before instrumentation. The images were captured digitally for further analysis using the Image Tools Software. The images were sectioned in three points, located at 9 mm, 6 mm and 3mm from the apex. In Group 1, the root canals were instrumented with ProTaper UniversalTM rotary system; in Group 2, with Twisted FileTM rotary system; and in Group 3, with MtwoTM rotary system. Instrumented teeth were scanned again using CBCT and the images of the uninstrumented canals were compared with images of the instrumented canals. The results were statistically analyzed using the one-way ANOVA test. A level of significance of 0.05 was adopted. RESULTS: The means of D1 at distances of 9 mm, 6 mm, and 3 mm from the apex were, respectively: Group 1: 0.88±0.257, 1.00±0.000, and 1.00±0.000; Group 2: 0.79±0.745, 0.65±0.669, and 0.25±0; Group 3: 0.50±0.745, 0.33±0.472, and 0.03±0.104. The means of D2 at distances of 9 mm, 6mm, and 3mm from the apex were respectively: Group 1: 1.00±0.00, 1.00±0.00, and 1.00±0.00; Group 2: 0.41±0.299, 0.30±0.428, and 0.50±0.707; Group 3: 0.58±0.910, 0.85±1.857, and 0.31±0.643. CONCLUSIONS: The CBCT analysis revealed that the ProTaper UniversalTM produced centered preparations and while the Twisted FileTM and MtwoTM rotary systems produced canal deviation.


Subject(s)
Humans , Male , Female , Cone-Beam Computed Tomography , Dental Pulp Cavity/anatomy & histology , Root Canal Preparation
5.
Braz. dent. sci ; 15(1): 27-32, 2012. tab
Article in English | LILACS, BBO | ID: lil-728080

ABSTRACT

The purpose of the present study was to analyze the influence of sterilization methods on the absorption capacity of different brands of standardized absorbent paper points, testing the hypothesis that there is a positive correlation between the percentage of increased absorption capacity and sterilization method. Standardized endodontic absorbent paper points (size rank from #15 to #40) from three different brands of three manufacturers were used for this study (Dentsply, Endopoints, Tanari). Twenty absorbent paper points of each size were used. The initial weight (iw) of each absorbent paper point was recorded using a digital scale. After sterilization, the dry weight (dw) of each absorbent paper point was determined. Each paper point was then introduced into a 2% methylene blue solution during 20 seconds until complete saturation. The paper points were removed from the solution and the wet weight (ww) was determined, with absorption capacity calculated from a difference between ww-dw. Data was statistically analyzed using Tukey’s test and the Student’s t-test (p<0.05). Tanari paper points exhibited the best absorption capacity among the brands analyzed, but the difference was non-significant. Sterilization process did not influence the absorption capacity of absorbent paper points


O objetivo do presente estudo foi analisar a influência dos métodos de esterilização sobre a capacidade de absorção de diferentes marcas de cones de papel absorvente, testando a hipótese de que existe uma correlação positiva entre o percentual de maior capacidade de absorção e o método de esterilização. Cones de papel absorvente padronizados (calibre de # 15 a # 40) de três marcas comerciais diferentes foram usados para este estudo (Dentsply, Endopoints, Tanari). Vinte pontas de papel absorvente de cada calibre foram utilizadas. O peso inicial de cada cone de papel absorvente foi aferido utilizando uma balança digital. Após a esterilização, o peso seco de cada cone de papel absorvente foi determinado. Em seguida, cada cone de papel foi introduzido em uma solução de azul de metileno a 2% durante 20 segundos até a saturação completa. Os cones de papel foram removidos da solução e o peso úmido foi determinado, e a capacidade de absorção calculada a partir da diferença entre peso úmido menos o peso seco. Os dados foram analisados estatisticamente pelo teste de Tukey e o teste t de Student (p <0,05). Os cones Tanari exibiram a melhor capacidade de absorção entre as marcas analisadas, mas a diferença não foi significativa. O processo de esterilização não influenciou a capacidade de absorção dos cones de papel absorvente>


Subject(s)
Dental Pulp Cavity , Endodontics , Sterilization
6.
Braz. j. oral sci ; 10(4): 282-287, oct.-dec. 2011. ilus
Article in English | LILACS, BBO | ID: lil-638390

ABSTRACT

Aim: To determine the centering ability of Twisted File™ rotary system compared with ProTaperUniversal™ and ProFile™ rotary systems by evaluating pre- and postoperative cross-sectionalimages of the apical root canals third. Methods: Thirty mesiobuccal canals of human mandibularfirst molars were divided into three groups with 10 root canals each according to the instrumentused: group 1, ProTaper Universal™ rotary system; group 2, ProFile™, and group 3, TwistedFile™. Pre- and postoperative images of the apical thirds were viewed with a stereoscopicmagnifier with ×10 magnification and were captured digitally for further analysis using the ImageTools Software. The results were analyzed statistically by the Kruskal-Wallis test and the Mann-Whitney test. A level of significance of 0.05 was adopted. Results: The means of the buccolingualmeasurement ranged from 0.79 to 1.5. The largest deviation was registered to instrument 25.06in group 2. The means of the mesiodistal measurement ranged from 0.86 to 1.52, with the largestdeviation being registered to instrument 25.04 in group 3; however, there were no statisticallysignificant differences (p>0.05) among the three groups or among the instruments in the samegroup in terms of centering ability. Conclusions: None of the rotary systems evaluated in thisstudy was totally effective in performing biomechanical preparation of the root canals.


Subject(s)
Dental Instruments , Dental Pulp Cavity
7.
Braz. j. oral sci ; 10(1): 37-41, jan.-mar. 2011. tab, graf
Article in English | LILACS, BBO | ID: lil-589649

ABSTRACT

Aim: The aim of the present study was to assess the recontamination time of root canals filled with ProTaper gutta-percha master point using the active lateral condensation and the single-cone techniques. Methods: Fifty premolars, after biomechanical preparation, were randomly divided into six groups according to the obturation technique and the diameter of the gutta-percha point. For leakage evaluation, the roots were mounted in a dual-chamber leakage model system using Pseudomonas aeruginosa, Enterococcus faecalis, Escherichia coli, and Staphylococcus aureus. The Kaplan-Meier and Long-Rank tests were employed at the .05 level of significance. Results: The recontamination was detected between the 13th and 80th days. The active lateral condensation produced less infiltration than the single cone technique, though without statistically significant differences between them. Conclusions: It may be concluded that there was no difference in bacterial penetration between the two root canal filling techniques. The mean root canalcontamination time was 67 days.


Subject(s)
Dental Leakage , Dental Pulp Cavity
8.
Odontol. clín.-cient ; 10(1): 65-68, jan.-mar. 2011. tab, graf
Article in Portuguese | LILACS, BBO | ID: lil-577680

ABSTRACT

A presente pesquisa teve por finalidade a avaliação das medidas do comprimento aparente do dente, obtidaspela régua endodôntica milimetrada em comparação com as obtidas através do compasso de pontaseca, em radiografias periapicais, iniciais de tratamentos endodônticos, realizados na Clínica de Endodontia IIda Universidade Federal de Pernambuco. Foram coletadas 200 radiografias periapicais que foram analisadasno negatoscópio com o auxílio de uma lupa com 5X de magnificação. As aferições do comprimento aparentedo dente foram realizadas com régua endodôntica milimetrada e com compasso de ponta seca. Os dados obtidos foram tabulados e analisados estatisticamente. A margem de erro utilizada na decisão dos testesestatísticos foi de 5,0%. O coeficiente de correlação de concordância entre os dois métodos de avaliação foi0,80 com intervalo 0,75 a 0,84. A média do comprimento foi 0,62 mm mais elevada, quando o método foia medida do compasso de ponta seca do que a medida do prontuário do paciente. De acordo com a metodologia empregada, conclui-se que não houve concordância entre os dois métodos avaliativos. A média do comprimento aparente do dente foi mais elevada, quando a medição foi realizada com o compasso de ponta seca do que com a régua endodôntica milimetrada.


The aim of this research was to evaluate the apparent tooth length, obtained by the endodonticmillimetered ruler, compared with those obtained through the compass needle point in periapicalradiographs of the endodontic treatment at Clinical of Endodontics II of the Federal University of Pernambuco.Two hundred periapical radiographs were analyzed in the light box with the aid of a magnifyinglens with 5X magnification. The apparent tooth length?s measurements were performed with amillimetered ruler and compass needle point. The data were statistically analyzed. The error?s margin inthe decision of the statistical tests was 5.0%. The concordance correlation coefficient between the twomethods was 0.80 with interval 0.75 to 0.84. The average length was 0.62mm higher when the methodwas the compass needle point measurement than the millimetered ruler measurement. According tothe methodology used, it was concluded that there was no agreement between the two evaluationmethods. The average of the apparent tooth length was higher when the measurement was taken with the compass needle point than with the endodontic millimetered ruler.


Subject(s)
Dental Pulp Cavity , Odontometry , Radiography
9.
Braz. j. oral sci ; 9(3): 402-409, July-Sept. 2010. ilus, tab
Article in English | LILACS, BBO | ID: lil-578064

ABSTRACT

Aim: The purpose of the present study was to evaluate the antimicrobial activity of 0.2%, 1%, and2% chlorhexidine in root canals instrumented with the ProTaper Universal™ system. Methods:Fifty human mandibular premolar teeth were infected with a mixture of Candida albicans,Pseudomonas aeruginosa, Enterococcus faecalis and Staphylococcus aureus. The specimens were randomly divided into 5 groups with 10 root canals according to the irrigant used. All root canals were instrumented with the ProTaper Universal™ system. Assessment of the antimicrobial action of the irrigant was performed before, during, and after instrumentation. Data were analyzed statistically by Chi-squared test and the Fisher exact test at 5% significance level. Results: The0.2% chlorhexidine solution was ineffective against all test microorganisms. The 1% chlorhexidinesolution was effective in eliminating P. aeruginosa and C. albicans after the use of the F1 and F3instruments, respectively. The 2% chlorhexidine solution was effective at killing S. aureus, P.aeruginosa and C. albicans after the use of the S1 instrument. There were statistically significant differences (p<0.05) between the concentrations of chlorhexidine and the instruments used.Conclusions: The 0.2% chlorhexidine solution in combination with rotary instrumentation was ineffective against all test microorganisms. The 1% chlorhexidine solution was ineffective against S. aureus and E. faecalis. The 2% chlorhexidine solution was not sufficient to inactivate E.faecalis.


Subject(s)
Humans , Chlorhexidine/pharmacology , Dental Pulp Cavity/drug effects , Disinfectants/pharmacology , In Vitro Techniques , Root Canal Irrigants/pharmacology , Root Canal Preparation/instrumentation , Bacteria/growth & development , Bacteria/isolation & purification , Chi-Square Distribution , Candida albicans/growth & development , Candida albicans/isolation & purification , Dental Pulp Cavity/microbiology , Time Factors
10.
Pesqui. bras. odontopediatria clín. integr ; 10(1): 127-133, jan.-abr. 2010.
Article in Portuguese | LILACS, BBO | ID: lil-549732

ABSTRACT

Introdução: Os microrganismos desempenham um importante papel na etiologia e manutenção das infecções endodônticas. Esta população microbiana deverá ser eliminada durante o preparo biomecânico por meio da ação mecânica dos instrumentos endodônticos, das propriedades físico-químicas e anti microbianas das soluções irrigadoras auxiliares e pela ação da medicação intracanal. Objetivo: O presente trabalho se propôs a avaliar, através de uma revisão da literatura, as principais soluções irrigadoras utilizadas na Endodontia para o preparo biomecânico do sistema de canais radiculares, bem como, a utilização de novas soluções irrigadoras. Conclusões: O hipoclorito de sódio (NaOCl) continua sendo a solução irrigadora de eleição na Endodontia. O NaOCl a 1% com 16% de cloreto de sódio (NaCl) deve ser utilizado durante o preparo biomecânico dos canais radiculares devido à sua atividade anti microbiana, capacidade solvente de matéria orgânica e baixa citotoxicidade. A clorexidina a 1% e a 2% é utilizada apenas quando o único requisito é a atividade antimicrobiana, em casos de microrganismos resistentes ao tratamento endodôntico e em lesões refratárias. Uma solução de ácido etilenodiaminotetracético sal dissódico (EDTA) a 17% deverá ser utilizada como coadjuvante do preparo biomecânico de canais radiculares infectados, no tratamento de canais atresiados e calcificados e para remoção do smear layer contaminado. Todas as soluções irrigadoras apresentam limitações. A procura por uma solução irrigadora ideal deverá ser contínua. Isto apenas poderá ser alcançado com o desenvolvimento e pesquisas de novas substâncias.


Introduction: Microorganisms play an important role in the etiology and persistence of endodontic infections. This microbial population should be eliminated during the biomechanical preparation by the mechanical action of the endodontc instruments, the physicochemical and antimicrobial properti ES of the auxiliary irrigating solutions, and the action of intracanal medications. Objective: This literature review addresses the main endodontic irrigating solutions used in the biomechanical preparation of the root canal system, as well as the use of irrigating solutions. Conclusions: Sodium hypochlorite (NaOCl) sti ll is the endodontic irrigant of choice. The combination of 1% NaOCl with 16% sodium chloride (NaCl) should be used during biomechanical preparati on of root canals due to its anti microbial activity, organic matter solving capacity and low cytotoxicity. Chlorhexidine at 1% and 2% is used when only anti microbial activity is required, in cases of microorganisms resistant to endodontic treatment and refractory lesions. A 17% disodium ethylenediaminetetraacetic acid (EDTA) should be used as an auxiliary in the biomechanical preparation of root canals, in the treatment of narrow and calcified canals, and for removal of contaminated smear layer. All irrigating solutions presente limitations. There must be a continuous search for the ideal solution endodontic irrigant, which will be reached only with the investigation and development of new substances.


Subject(s)
Dental Pulp Cavity , Chlorhexidine , Endodontics , Sodium Hypochlorite , Dental Instruments , Chelating Agents , Biomechanical Phenomena
11.
J. appl. oral sci ; 17(6): 590-595, Nov.-Dec. 2009. ilus, tab
Article in English | LILACS | ID: lil-534425

ABSTRACT

OBJECTIVE: The aim of this study was to examine the instrumented walls of root canals prepared with the ProTaper UniversalTM rotary system. MATERIAL AND METHODS: Twenty mesiobuccal canals of human first mandibular molars were divided into 2 groups of 10 specimens each and embedded in a muffle system. The root canals were transversely sectioned 3 mm short of the apex before preparation and remounted in their molds. All root canals were prepared with ProTaper UniversalTM rotary system or with NitiflexTM files. The pre and postoperative images of the apical thirds viewed with a stereoscopic magnifier (X45) were captured digitally for further analysis. Data were analyzed statistically by Fisher's exact test and Chi-square test at 5 percent significance level. RESULTS: The differences observed between the instrumented and the noninstrumented walls were not statistically significant (p<0.05). CONCLUSIONS: The NitiflexTM files and the ProTaper UniversalTM rotary system failed to instrument all the root canal walls.


Subject(s)
Humans , Dental Pulp Cavity/anatomy & histology , Root Canal Preparation/instrumentation , Biomechanical Phenomena , Dental Alloys/chemistry , Equipment Design , Edetic Acid/therapeutic use , Image Processing, Computer-Assisted , Materials Testing , Molar/pathology , Nickel/chemistry , Rotation , Root Canal Irrigants/therapeutic use , Root Canal Preparation/methods , Surface Properties , Sodium Hypochlorite/therapeutic use , Titanium/chemistry , Tooth Apex/pathology
12.
Ciênc. odontol. bras ; 10(4): 32-36, out.-dez. 2007. ilus, graf
Article in Portuguese | LILACS, BBO | ID: lil-500857

ABSTRACT

O objetivo da presente pesquisa foi avaliar o selamento apical dos cones FM calibrados e dos cones ProTaper™ em canais instrumentados pelo sistema rotatório ProTaper™, por meio da infiltração apical de nanquim preto. Os espécimes foram imersos até o terço cervical no corante por 7 dias à temperatura de 37°C ± 1 e umidade absoluta. Em seguida foram seccionados no sentido vestíbulo-lingual e avaliados, por meio de lupa esteriomicroscópica com 40X de magnificação, por três examinadores independentes calibrados. Os dados foram analisados pelos testes de Kruskall-Wallis e U-Mann-Withney com grau de significância α=0,05. Observou-se infiltração em 30% dos espécimes no grupo dos cones FM calibrados e em 10% no dos cones ProTaper™. Contudo, a diferença não foi estatisticamente significante.


Subject(s)
Humans , Dental Leakage , Gutta-Percha , Root Canal Obturation , Bicuspid
13.
Odontol. clín.-cient ; 6(3): 255-258, jul.-set. 2007. tab, graf
Article in English | LILACS, BBO | ID: lil-500985

ABSTRACT

O objetivo do presente estudo foi avaliar a padronização dos diâmetros D das limas endodônticas de acordo com a especificação ISO-3630-1 da International Standard Organization. Seiscentas e seis limas endodônticas tipo K e Hedstroen de primeira e segunda série com 25 mm de comprimento das três marcas comumente encontradas no mercado brasileiro: Dentsply-Maillefer (Ballaigues, Swiss), Dyna Endodontics Instruments (Bourges-France) and Kerr Dentistry (Romulus, USA). Com auxílio de um paquímetros D dos instrumentos avaliados. Os resultados demonstraram pouca correspondência entre os diâmetros D das limas endodônticas e o que preconiza a normal ISO-3630-1 da Intrnational Standard Organization.


The objective of this study was to evaluate the standardization of the diameters (D) of endodontics files in accordance with the recommendation of the International Standard Organization in its specification ISO-3630-1...


Subject(s)
Dental Instruments , Quality Control , Root Canal Therapy
14.
Odontol. clín.-cient ; 5(3): 211-215, jul.-set. 2006. ilus, tab
Article in Portuguese | LILACS, BBO | ID: lil-509891

ABSTRACT

O presente trabalho se propôs a avaliar, através da superposição radiográfica, a ocorrência de desvios no terço apical em canais radiculares instrumentados com o ProTaper Manual™ e com os Sistemas Rotatórios ProTaper™ e RaCe™. Utilizou-se 60 molares inferiores humanos, os quais foram incluídos em blocos de resina acrílica e divididos em três grupos: grupo A: Canais preparados pelo ProTaper Manual™, grupo B: Canais preparados pelo Sistema Rotatório ProTaper™ e grupo C: Canais preparados pelo Sistema Rotatório RaCe™. Os grupos A e B foram preparados até o instrumento apical final F2 e o grupo C até o instrumento 25.02. As imagens obtidas pela superposição das radiografias pré e pós-operatórias foram avaliadas por dois endodontistas, com o auxílio de um negatoscópio e de uma lupa de 5X de aumento, quanto a presença ou ausência de desvio no terço apical. Os resultados foram analisados estatisticamente utilizando-se o teste de Fisher-Freeman-Halton. A instrumentação com o ProTaper Manual™ e com o sistema rotatório ProTaper™ apresentou 25 por cento dos canais com desvio no terço apical e o sistema rotatório RaCe™ 20 por cento. Apesar do RaCe ter apresentado menor número de desvios no terço apical, estes resultados não foram estatisticamente significantes(p>0,05).


Subject(s)
Dental Pulp Cavity , Dental Instruments , Root Canal Preparation/instrumentation , Root Canal Preparation/methods
15.
Rev. Assoc. Paul. Cir. Dent ; 60(1): 67-71, jan.-fev. 2006. ilus, tab
Article in Portuguese | LILACS, BBO | ID: lil-472559

ABSTRACT

O presente trabalho se propôs avaliar, através da superposição radiográfica, a ocorrência de desvios no terço apical em canais radiculares instrumentados pelo sistema ProTaper™. Utilizaram-se 40 molares inferiores humanos, os quais foram instrumentados até o instrumento apical final F2 cujo diâmetro D0 é igual a 0,25 mm. As imagens obtidas pela superposição das radiografias pré e pós-operatórias foram avaliadas por três endodontistas, com o auxílio de um negatoscópio e de uma lupa de 5 X de aumento. Os resultados foram analisados estatisticamente (teste exato de Fisher). O sistema rotatório ProTaper™ mostrou-se mais eficaz na manutenção da trajetória original do canal radicular em relação ao preparo manual com limas de níquel-titânio. Contudo, esses resultados não foram estatisticamente significantes.


Subject(s)
Dental Pulp Cavity , Endodontics/instrumentation , Dental Instruments , Root Canal Preparation
16.
Odontol. clín.-cient ; 4(3): 185-188, set.-dez. 2005.
Article in English | LILACS, BBO | ID: lil-437451

ABSTRACT

A presente pesquisa objetivou verificar o percentual de sucessos dos tratamentos endodônticos realizados pelos alunos de graduação na disciplina de Endodontia III (dentes posteriores) do Departamento de Prótese e Cirurgia Buco-Facial do Centro de Ciências da Saúde da Universidade Federal de Pernambuco. Foram relacionados e contactados os 90 pacientes atendidos, na referida disciplina, no período de 1999 a 2002 dos quais 51 (56,6%) retornaram para realização dos exames clínicos e radiográficos. Em seguida, os dados obtidos foram comparados com os constantes no prontuário odontológico dos pacientes. 0s dados foram tabulados e analisados por avaliadores independentes os quais categorizavam em sucesso ou insucesso. 0s resultados obtidos permitiram concluir a alta qualidade do padrão dos tratamentos endodônticos realizados pelos alunos do curso de graduação, visto que 94,84% da amostra foi classificada como sucesso


Subject(s)
Humans , Calcium Hydroxide/therapeutic use , Tooth, Nonvital , Treatment Failure
17.
RFO UPF ; 10(1): 69-73, jan.-jun. 2005. ilus
Article in Portuguese | LILACS, BBO | ID: lil-438491

ABSTRACT

O presente trabalho propôs-se avaliar, por meio da superposição de radiografias pré e pós-operatórias a ocorrência de alterações morfológicas no terço apical de canais radiculares instrumentados pelo sistema rotatório Hero 642 (Micro-Mega, Besaçon, France) e pelas limas manuais de níquel-titânio (NiTi), NiTiFlex (Dentsply/Maillefer.Ballaigues, Swiss). Foram utilizados quarenta molares inferiores humanos com processo de rizogênese concluído, ibtidos do Banco de Dentes do Curso de pós-graduação em Odontologia do Centro de Ciências da Saúde da Universidade Federal de Pernambuco, com o objetivo de comparar as alterações morfológicas no terço apical produzidas pelo preparo biomecânico, no qual o instrumento apical final foi um instrumento de diâmetro D0 igual a 1,25mm. As imagens radiográficas foram avaliadas por três examinadores independentes, endodontistas, previamente treinados, eos resultados foram submetidos à análise estatística, utilizando-se o teste exato de Fisher para comparar as proporções de desvios obtidos pelas duas técnicas. Com base nos resultados obtidos, conclui-se que o sistema rotatório Hero 642 apresentou um menor número de canais com desvios no terço apical do que a instrumentação manual com limas de NiTi, contudo esses resultados não foram estatísticamente significantes


Subject(s)
Dental Pulp Cavity , Dental Instruments , Root Canal Preparation/instrumentation
18.
Appl. cancer res ; 25(2): 90-92, Apr.-June 2005.
Article in English | LILACS, Inca | ID: lil-442299

ABSTRACT

Oncocytoma is a rare benign tumor of the salivary glandrepresenting not more than 1% of salivary tumors. It iscomposed of large epithelial cells, the oncocytes, whichare predominantly found, in senior adults, being moreprevalent in the eighth decade of life. It is located mainlyin larger salivary glands especially in parotid glands.The tumor usually presents as a solid mass, painless, ofslow growth, and rarely it is larger than 4 cm ofdiameter. There are few reports in literature on minorsalivary glands neoplasias. This work aims to presentand discuss a clinical case of a 71-year-old male patientwith a 20 X 10 mm asymptomatic nodular lesion, ofapproximately 14 years duration, located in the oralmucosa on the left side of the mouth, with clinical andsurgical diagnosis of fibroma. An excisional biopsy ofthe lesion was made and the specimen was embedded in10% formaldehyde solution and delivered to the OralPathology Laboratory of the Federal University ofPernambuco for analysis. The histopathologicalexamination was carried out by hematoxylin/eosin andPAS staining with and without diastase. The specimenwas diagnosed as a minor salivary gland oncocytoma.


Subject(s)
Humans , Aged , Adenoma, Oxyphilic , Adenoma/pathology , Salivary Glands , Adenoma, Oxyphilic/pathology
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