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1.
Endodoncia (Madr.) ; 38(2): 14-19, oct. 2020. ilus
Artigo em Espanhol | IBECS | ID: ibc-198455

RESUMO

INTRODUCCIÓN: Un ferrule de 2 mm a 3600 asegura la supervivencia a largo plazo del diente restaurado. Sin embargo, existen situaciones clínicas donde el ferrule es insuficiente. Existen básicamente 3 opciones de tratamiento para la obtención de ferrule sin invadir el espacio biológico: el alargamiento de corona quirúrgico, la extrusión ortodóntica rápida y la extrusión quirúrgica. CASO CLÍNICO: EL presente caso clínico describe la restauración de un premolar inferior sin ferrule por medio de la extrusión quirúrgica, el retratamiento de conductos, y la colocación de poste y corona. CONCLUSIÓN: La extrusión quirúrgica permite, de manera altamente predecible restaurar dientes sin ferrule con raíces largas y periodontalmente sanos, sin comprometer los tejidos periodontales ni necesidad de aparatología ortodóntica


INTRODUCTION: A 2-mm ferrule over 3600 ensures a long-term survival of the restored tooth. However, there are clinical situations in which ferrule is insufficient. Thus, there are 3 treatment options to obtain ferrule without invading the biological width: surgical crown lengthening, rapid orthodontic extrusion and surgical extrusion. CLINICAL CASE: The present clinical case describes the restoration of a lower premolar without ferrule by means of surgical extrusion, root canal re-treatment, and post and crown. CONCLUSION: Surgical extrusion allows predictably the restoration of long, periodontally healthy teeth with no ferrule, without compromising the periodontal tissues or the need for orthodontic appliances


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Extrusão Ortodôntica/métodos , Obturação do Canal Radicular/métodos , Aumento da Coroa Clínica/métodos , Técnica para Retentor Intrarradicular , Restauração Dentária Permanente/métodos , Resultado do Tratamento , Porcelana Dentária/uso terapêutico
2.
Niger J Clin Pract ; 23(6): 811-816, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32525116

RESUMO

Background: An optimum bonding between the sealer and dentin is important for impermeable root canal filling and many procedures were applied to improve root canal dentin and in turn the bond strength between the sealer and dentine. There is lack of sufficient data on the effect of nonthermal plasma application on the bond strength of sealers to the root canal dentin. Aim: The purpose of this study was to evaluate the effect of NAP on the push-out bond strength (PBS) of a bioceramic and resin-based root canal sealer (RCS) to root canal dentin. Materials and Methods: Forty single-rooted mandibular premolars were decoronated. After preparation and final irrigation, the specimens were divided into four groups (n = 10). Group AH: Root canals were filled with gutta-percha (GP) and AH Plus RCS, Group P-AH: Root canals were filled with GP and AH Plus RCS following the NAP application, Group BC: Root canals were filled with GP and Endosequence BC RCS, and Group P-BC: Root canals were filled with GP and Endosequence BC RCS following the NAP application. Then roots were sectioned horizontally to obtain ~1 mm thick dentin disks. PBS test was performed to the second (coronal) and fourth (middle) slices. Data were analyzed with the Kruskal-Wallis and t-test. Results: There was a statistically significant difference among the groups for both coronal and middle regions (P < 0.05). P-BC group showed higher PBS than AH and P-AH groups in the coronal region. P-BC group showed higher PBS than the other groups in the middle region. Conclusions: The use of NAP did not influence the push-out bond strength of AH-Plus sealer to the root canal dentin. The Endosequence-BC sealer showed a better bond strength than the AH-Plus sealer after NAP application.


Assuntos
Cavidade Pulpar , Materiais Restauradores do Canal Radicular/química , Obturação do Canal Radicular/métodos , Cimento de Óxido de Zinco e Eugenol , Dente Pré-Molar , Colagem Dentária , Dentina , Resinas Epóxi/química , Guta-Percha/química , Humanos , Teste de Materiais , Pressão , Preparo de Canal Radicular/métodos , Temperatura
3.
Endodoncia (Madr.) ; 38(1): 22-27, jun. 2020. tab, ilus
Artigo em Espanhol | IBECS | ID: ibc-199206

RESUMO

OBJETIVO: Evaluar en conductos simulados instrumentados con técnicas mecanizadas, la profundidad de penetración de los instrumentos para la obturación con diferentes técnicas y sistemas. MATERIALES Y MÉTODOS: Se emplearon 30 conductos simulados divididos en 3 grupos de 10. Grupo 1. Instrumentado con TruNatomy Prime, Grupo 2. Instrumentado con Wave One Gold Primary y Grupo 3. Instrumentado con ProTaper Gold F2. En cada grupo se realizaron 4 pruebas. 1. Nivel de penetración del atacador manual 9P de 0.6 mm Schilder; 2. Nivel de penetración del atacador Calamus #40 .03; 3. Nivel de penetración de la cánula Calamus 23G; 4. Nivel de penetración del verificador SV20 de GuttaCore para el Grupo 1 y el SV25 para los grupos 2 y 3. Para la evaluación estadística se utilizó análisis de variancia y prueba de Tukey para comparaciones múltiples. Nivel de significación P < 0,05. RESULTADOS: En las pruebas 1,2 y 3, las preparaciones con TruNatomy mostraron una penetración menor de los instrumentos de obturación comparada a las de WaveOne Gold y ProTaper Gold. En la prueba 4, el verificador SV20 fue adecuado con el TruNatomy, en tanto el SV25 lo fue para WaveOne Gold y ProTaper Gold. El análisis estadístico de las pruebas 1,2 y 3 mostró diferencia significativa entre TruNatomy y los otros grupos. En la prueba 4 todos los verificadores penetraron adecuadamente. CONCLUSIONES: 1.- La preparación con TruNatomy Prime dificultó la penetración de los dispositivos necesarios para la obturación con las diferentes técnicas. Para el GuttaCore, el verificador empleado debería ser de un calibre menor al instrumento de prepa-ración. 2.- Los instrumentos WaveOne Gold Primary y ProTaper Gold F2 produjeron una conformación que permitió una penetración mayor de los dispositivos de obturación. Los verificadores GuttaCore de dichos sistemas coincidieron con los instrumentos de preparación


OBJECTIVE: The aim of the study was to evaluate depth of penetration of the instruments used in different obturation techniques and systems in simulated curved canals prepared with three different techniques. MATERIALS AND METHODS: Thirty with simulated curved canals were used and divided into three groups. Group 1 Was instrumented with TruNatomy Prime. Group 2. Was instrumented with WaveOne Gold Primary. Group 3. Was instrumented with ProTaper Gold F2. In each group four tests were carried out. 1. for depth of penetration of manual plugger 9P 0.6 mm Schilder; 2. for depth of penetration of the Calamus Dual plugger #40 .03; Test 3. for depth of penetration of the Calamus Dual cartridge 23G. Test 4. for depth of penetration of the GuttaCore SV20 verifier for group 1 and SV25 verifier for groups 2 and 3. The results were statistically evaluated by the analysis of variance and Tukey multiple comparison test. The level of significance was set at P < 0.05. RESULTS: In tests 1, 2 and 3 canals prepared with TruNatomy showed lower penetration depth than groups prepared with WaveOne Gold Primary and ProTaper Gold. In test 4 verifier SV20 was adequate for TruNatomy, while SV25 was for WaveOne Gold and ProTaper Gold. Statistical analysis of tests 1,2 and 3 showed a significant difference between TruNatomy and the other groups. In test 4, all the verifiers penetrated adequately. CONCLUSIONS:1.- The use of TruNatomy Prime in simulated curved canals limited the penetration of the devices from the different obturation techniques. GuttaCore verifier should be selected one caliber less than the instrument used. 2. WaveOne Gold Primary and ProTaper Gold F2 shaped a canal that allowed deeper penetration of the obturation devices. GuttaCore verifiers employed corresponded with the instruments used


Assuntos
Humanos , Obturação do Canal Radicular/métodos , Instrumentos Odontológicos , Cavidade Pulpar , Obturação do Canal Radicular/instrumentação , Guta-Percha/uso terapêutico , Calamus , Análise de Variância
4.
BMC Oral Health ; 20(1): 88, 2020 03 26.
Artigo em Inglês | MEDLINE | ID: mdl-32216774

RESUMO

BACKGROUND: Smear layer removal has been shown to reduce bacterial penetration through root canal obturations when resin-based endodontic sealer is used. The purpose of this in vitro study was to test this effect when a non-resin-based sealer is used. MATERIAL AND METHODS: Thirty root segments were assigned to the following groups: Smear layer removed (n = 8); smear layer retained (n = 8); negative controls (n = 10; 5 with smear layer, 5 without); and positive controls (n = 4; 2 with smear layer, 2 without). After rotary instrumentation, smear layers were removed in the treatment group and half of controls using 17% ethylenediamenetetraacetic acid (EDTA) prior to obturation. Each obturated root was affixed into a dual-chamber leakage model employing Streptococcus mutans. Roots were incubated at 37 °C for 120 d. Days until lower chamber turbidity occurred was recorded for each sample, and data were analyzed using Kaplan-Meier survival curve analysis (p = 0.05). RESULTS: No negative controls leaked, while all positive controls were turbid within 1 day. Mean days to leakage for roots with smear layer intact was 82.75 (+/- 33.29, 95% CI), although three never leaked. Mean days to leakage through roots with smear layer removed was 46.25 (+/- 26.67, 95% CI), and all leaked. Treatment survival curves were significantly different (p = 0.048). CONCLUSIONS: Under the conditions and limitations of this study, retaining the smear layer reduced the rate of bacterial penetration through canals which had been obturated using zinc oxide eugenol (ZOE) -based sealer.


Assuntos
Infecções Bacterianas/prevenção & controle , Infiltração Dentária/prevenção & controle , Cavidade Pulpar/microbiologia , Obturação do Canal Radicular/métodos , Camada de Esfregaço , Cimento de Óxido de Zinco e Eugenol/uso terapêutico , Eugenol , Guta-Percha , Humanos , Materiais Restauradores do Canal Radicular , Óxido de Zinco
5.
PLoS One ; 14(11): e0224793, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31751375

RESUMO

AIM: To compare the efficiency of continuous wave obturation and cold lateral condensation techniques and filling time in C-shape canals of 3-dimensional (3D)-printed resin teeth shaped with Reciproc Blue (VDW) or Hyflex EDM (Coltene/Whaledent). METHODOLOGY: One tooth with C1-type orifice and root canal morphology and one with C2-type orifice and C2-C3 root canal morphology were selected based on CBCT. Two replicas of selected teeth were manufactured with a 3D-printer and their canals were instrumented with Reciproc Blue or Hyflex EDM. These 4 instrumented replicas were scanned with CBCT. Identical 10 replicas of each group (total of 40) were produced using a 3D-printer and randomly divided into 2 groups (n = 5), root filled with either continuous wave obturation (CW) or cold lateral condensation (LC). Horizontal cross-sections of C1-type were made at 2, 4, 6, 8 mm and C2-type at 2, 4, 6 mm from the apical foramen. Gutta-percha, sealer and void areas were evaluated with image analysis sofware. Data were analysed using nonparametric Kruskal-Wallis and Mann Whitney-U tests and the Factorial ANOVA was used for interaction effects. Time required to fill canals was evaluated using the Mann-Whitney U test. RESULTS: For C1-type, LC had more gutta-percha and less sealer compared to CW in 2-mm sections (p<0.05). CW had greater percentages of gutta-percha and lower percentages of sealer compared with LC group in 4, 6, 8 mm sections and total area (p<0.05). LC group had higher percentages of voids compared to CW group in 2 and 4 mm sections (p<0.05). For C2-type, CW had more gutta-percha and less sealer versus LC group in all sections and total area (p<0.05). LC had the least gutta-percha and greatest sealer percentages at 6-mm sections (p<0.05). There was no statistically significant difference in the percentages of voids at any level of sections between the filling techniques (p>0.05). In both C-types, there was no significant difference in the percentages of gutta-percha, sealer and voids between Reciproc Blue and Hyflex EDM-shaped groups at any level (p>0.05). Time spent for the LC technique and filling C1-type was significantly longer than when using the CW technique and filling C2-type (p<0.05). CONCLUSIONS: Continuous wave obturation was more effective than lateral condensation in both C1- and C2-type, except for the apical 2 mm section of C1-type, suggesting the need for a modified CW technique.


Assuntos
Cavidade Pulpar/anatomia & histologia , Obturação do Canal Radicular/métodos , Preparo de Canal Radicular/instrumentação , Tomografia Computadorizada de Feixe Cônico , Cavidade Pulpar/diagnóstico por imagem , Humanos , Imageamento Tridimensional , Modelos Anatômicos , Impressão Tridimensional , Preparo de Canal Radicular/métodos , Fatores de Tempo
6.
Georgian Med News ; (292-293): 17-21, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31560656

RESUMO

The purpose of endodontic treatment is root canal preparation, irrigation and reliable filling. If this procedure results in quality tooth restoration, then long-term tooth function is guaranteed. All stages of the endodontic treatment process are important, but the final treatment procedure is root canal obturation, in which the dentist discusses the intended purpose. The process of root canal obturation is a time-consuming and costly manipulation. In this process, complete filling of the apical (peak) root is crucial. Therefore, the aim of this study was to determine the quality of canal filling in apical third of root using 3 techniques: lateral condensation, and thermoplastic Gutta Master and Gutta Fussion obturators. The quality of obturation was evaluated on 36 extracted human teeth. Teeth were divided into 3 groups according to the obturation technique (A, B, C study groups). In each group, the roots of the tooth were sectioned by 2 transverse cuts (perpendicular to the long axis) into 3 segments - apical, middle and coronal thirds. A scanning electron microscopic (SEM) study of apical thirds was performed. The SEM study had to identify the gap between material and root dentin, distant from the canal in all three techniques. The extent of the gap was assessed using modified criteria by R. Tanikodas (2016). The study revealed that absolutely no hermetic obturation of the canal system was recorded in any of the study groups. In all cases, microleakage of different degree and localization between the filling material and the canal wall was observed. However, the worst results were revealed in group A, where interphase weakening was the most frequent. Gutta-Master and Gutta-Fussion thermoplastic obturation showed better adhesion to the walls, but the degree of obturation in group C teeth was better than the results in specimens where the canals had been filled with Gutta-Master.


Assuntos
Guta-Percha , Materiais Restauradores do Canal Radicular , Obturação do Canal Radicular/métodos , Tratamento do Canal Radicular , Cavidade Pulpar , Temperatura Alta , Humanos , Raiz Dentária/anatomia & histologia , Resultado do Tratamento
7.
Endodoncia (Madr.) ; 37(2): 22-28, sept. 2019. graf, ilus
Artigo em Espanhol | IBECS | ID: ibc-186296

RESUMO

Objetivos. El propósito de este trabajo fue evaluar los efectos biológicos de MTA Repair HP y ProRoot MTA en células madre procedentes de ligamento periodontal (hPDLSCs) tras ser ex-puestos los cementos a ambiente ácido y neutro. Material y Métodos: Discos de cada material (n=30) fueron ex-puestos a un tampón fosfato-salino (pH 7.4) o a ácido butírico (pH 5.2) durante 7 días, posteriormente se realizaron pruebas biológicas in vitro usando hPDLSCs. A partir de eluatos de los diferentes materiales de obturación a retro, se analizaron pruebas de viabilidad celular y apoptosis. Para evaluar la adhesión celular, hPDLSCs se sembraron directamente sobre la superficie de los materiales y se observaron bajo microscopio electrónico de barrido. Para analizar estadísticamente los resultados se usaron los test ANOVA y Tukey test (p < 0.05). Resultados: Los cementos endodónticos expuestos a ambiente ácido mostraron un similar grado de adhesión celular, y sorprendentemente, MTA Repair HP a pH 5.2 exhibió una mayor viabilidad celular que ProRootMTA (p<0.05). A pH 7.4, ProRooT MTA obtuvo una tasa mayor de viabilidad celular que con MTA Repair HP. Conclusiones: Los materiales ProRoot MTA y MTA Repair HP presentaron adecuadas propiedades biológicas en los diferentes ambientes, en términos de viabilidad celular, apoptosis y adhesión


Objectives: The purpose of this work was to evaluate the biolo-gical effects of MTA Repair HP and ProRoot MTA on stem cells from periodontal ligament (hPDLSCs) after exposure to acidic and neutral environments. Material and Methods: Discs of each material (n=30) were ex-posed to phosphate buffered saline (pH = 7.4) or butyric acid (pH = 5.2) for 7 days, and biological testing was carried out in vitro on hPDLSCs. Cell viability and apoptosis assays were performed using eluates of each root-end filling material. To evaluate cell attachment to the different materials, hPDLSCs were directly seeded onto the material surfaces and analyzed by scanning electron microscopy. Statistical differences were assessed by ANOVA and Tukey test (p < 0.05).Results: Endodontic cements exposure to an acidic environment showed a similar degree of cell adherence, and, surprisingly, MTA Repair HP exhibited higher cell viability rates at pH 5.2 than Pro-Root MTA, whereas ProRoot MTA 7.4 showed higher cell viability rates than MTA Repair HP. Conclusions: Adequate biological properties of ProRoot MTA and MTA Repair HP in terms of cell viability, cell death and cell attach-ment were observed in both environments


Assuntos
Humanos , Adolescente , Adulto Jovem , Adulto , Cimentos Dentários/uso terapêutico , Concentração de Íons de Hidrogênio , Ligamento Periodontal , Células-Tronco , Reações Biológicas , Separação Celular , Sobrevivência Celular , Apoptose , Materiais Restauradores do Canal Radicular/classificação , Materiais Restauradores do Canal Radicular/uso terapêutico , Obturação do Canal Radicular/métodos
8.
J Dent ; 89: 103181, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31430509

RESUMO

OBJECTIVES: The aim of this study was to develop a new method of obturation by warm sealer in conjunction to single cone gutta-percha and evaluate the suitability of this technique to obturate complex root canal systems. METHODOLOGY: Three root canal sealers namely, AH Plus, BioRoot RCS, GuttaFlow and a prototype sealer composed of tricalcium silicate and 30% zirconium oxide mixed with water and water-soluble polymer were investigated. The sealers were tested for flow, film thickness, setting time and radiopacity following ISO 6876 (2012) recommendations at room temperature and following heat application at 100°C to change the sealer properties. All the test sealers were characterized by scanning electron microscopy and energy dispersive spectroscopy. The volume of voids when used with a single cone obturation technique both unmodified and modified by heat was evaluated using microcomputed tomography. RESULTS: Although the prototype sealer was designed to be similar to the BioRoot, its physical properties were found to be different. All sealers tested were affected by the heat and exhibited a change in the physical properties mainly the setting time, flow, film thickness and void volume. CONCLUSIONS: The application of heat affected the sealer properties and void volume. The single cone obturation technique may not be suitable for complex canal anatomy and furthermore, AH Plus should not be subjected to high temperatures as its properties deteriorate and void volume increases.


Assuntos
Guta-Percha/química , Teste de Materiais/métodos , Materiais Restauradores do Canal Radicular/química , Obturação do Canal Radicular/métodos , Compostos de Cálcio/química , Resinas Epóxi/química , Temperatura Alta , Humanos , Silicatos/química , Microtomografia por Raio-X
9.
Niger J Clin Pract ; 22(8): 1091-1098, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31417052

RESUMO

Aims: Our aim was to compare three different voxel sizes of CBCT images for the determination of residual filling material volume in root canals when compared with micro CT. Material and Methods: Forty-two root canals of 14 extracted human maxillary molar teeth were retreated by using ProFile® instruments. Images were obtained after retreatment by using ProMax 3D Max CBCT at 3 different voxel sizes (1) High resolution (0.1 mm); (2) High definition (0.15 mm); and (3) Normal resolution (0.2 mm). Two observers measured volumes of residual filling materials in exported CBCT images by means of 3D Doctor Software. Micro CT measurements were served as gold standard. Mann-Whitney U test and Wilcoxon Test were used for the comparison of CBCT and micro CT measurements. Statistical significance was set at P < 0.05. Results: No statistically differences were found between the two observers for all measurements (P > 0.05). There were no significant differences among different CBCT voxel sizes used (0.1 mm, 0.15 mm, and 0.2 mm) (P > 0.05). The Spearman correlation coefficients between CBCT at different voxel sizes significantly highly correlated with micro CT measurements for each observer (P < 0.05). Furthermore, no significant differences were found between the measurements obtained by the two observers in consideration to root canal location (P > 0.05). Conclusion: CBCT images may provide useful information in the volumetric assessment of the amount of residual filling material in root canals for retreatment procedures.


Assuntos
Cavidade Pulpar/diagnóstico por imagem , Dente Molar/diagnóstico por imagem , Dente Molar/cirurgia , Retratamento , Materiais Restauradores do Canal Radicular/química , Obturação do Canal Radicular/métodos , Tratamento do Canal Radicular/métodos , Tomografia Computadorizada de Feixe Cônico Espiral/métodos , Materiais Dentários , Humanos , Processamento de Imagem Assistida por Computador/métodos , Materiais Restauradores do Canal Radicular/uso terapêutico , Preparo de Canal Radicular/métodos , Microtomografia por Raio-X/métodos
10.
Niger J Clin Pract ; 22(7): 926-931, 2019 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-31293256

RESUMO

Background: This study was performed to evaluate the amount of apically extruded debris removed from a root canal filled with cold lateral condensation (CLC), and warm vertical compaction (WVC) techniques, using b or a phase gutta-percha with AH-Plus (Dentsply DeTrey, Konstanz, Germany) or Resilon (Resilon Research LLC, Madison, WI) with RealSeal SE (SybronEndo, Amersfoort, The Netherlands). Materials and Methods: About 100 human incisor teeth were prepared with a #25.06 NiTi rotary system and divided into five groups according to the filling material used: Group 1: CLC (gutta-percha, AH-Plus); Group 2: WVC (b phase gutta-percha, AH-Plus); Group 3: WVC (a phase gutta-percha, AH-Plus); Group 4: CLC (Resilon, RealSeal SE); and Group 5: WVC (Resilon, RealSeal SE). Extruded debris during the retreatment procedure was collected in preweighed Eppendorf tubes. The times required for retreatment were recorded. Results: The amount of debris extrusion was significantly greater with WVC than CLC in the gutta-percha and Resilon groups (P < 0.001). Using a phase gutta-percha resulted in significantly more debris extrusion than b phase gutta-percha (P < 0.001). In the WVC groups, Resilon caused significantly more debris extrusion than gutta-percha (P < 0.05). Retreatment was faster for CLC than WVC (P < 0.05). Conclusions: In the retreatment procedure, the amount of apically extruded debris and retreatment duration were dependent on the type of obturation material and technique used.


Assuntos
Cavidade Pulpar/cirurgia , Guta-Percha/química , Materiais Restauradores do Canal Radicular/química , Preparo de Canal Radicular/instrumentação , Preparo de Canal Radicular/métodos , Tratamento do Canal Radicular/instrumentação , Ligas Dentárias/química , Humanos , Níquel , Retratamento , Materiais Restauradores do Canal Radicular/efeitos adversos , Obturação do Canal Radicular/métodos , Titânio/química , Ápice Dentário/patologia
11.
Rev. Asoc. Odontol. Argent ; 107(2): 42-48, abr.-jun. 2019. ilus, tab
Artigo em Espanhol | LILACS | ID: biblio-1015526

RESUMO

Objetivo: Evaluar radiográficamente, en dientes extraídos, el grado de homogeneidad y adaptación de las obturaciones endodónticas realizadas por alumnos de grado, comparando las técnicas de condensación lateral e híbrida. Materiales y métodos: Entre 2003 y 2017, los alumnos de tercer año de la Escuela de Odontología de la Universidad del Salvador / Asociación Odontológica Argentina realizaron 5.384 tratamientos endodónticos ex vivo empleando, para la obturación, las técnicas de condensación lateral e híbrida. En las radiografías posoperatorias, un docente especialista en endodoncia evaluó la homogeneidad y la adaptación de cada obturación para categorizarla como correcta o incorrecta. Para la comparación entre técnicas, dentro de cada año lectivo, se utilizó la prueba exacta de Fisher, y para el análisis porcentual de las observaciones, la prueba de Chi cuadrado. El nivel de significancia fue establecido en P<0,05. Resultados: Del total de 5.384 tratamientos, 4.970 (92,3%) mostraron obturaciones correctas. Con la técnica de condensación lateral, de los 1.741 tratamientos, 1.560 (89,6%) mostraron obturaciones correctas con la técnica híbrida, de los 3.643 tratamientos, 3.410 (93,6%) tuvieron obturaciones correctas. En función del tamaño total de las muestras, sumando todos los años, puede estimarse con 95% de confianza que la diferencia de obturaciones incorrectas entre ambas técnicas está entre el 2,3% y el 5,7%. Con la prueba del Chi cuadrado, se observa una diferencia significativa de obturaciones correctas a favor de la técnica híbrida (P<0,01) Conclusiones: La evaluación radiográfica de los tratamientos endodónticos realizados ex vivo por alumnos de pregrado mostró un alto porcentaje de obturaciones correctas. Así mismo, el empleo de la técnica híbrida dio, en general, mejores resultados de compactación de la masa del material obturador que la técnica de condensación lateral (AU)


Aim: To evaluate radiographically the degree of homogeneity and adaptation of endodontic obturations completed by undergraduate students in extracted teeth using lateral and hybrid condensation techniques. Materials and methods: Between 2003 and 2017, third year students of a the School of Dentistry of the Universidad del Salvador / Asociación Odontológica Argentina performed 5384 ex vivo endodontic treatments using lateral condensation and hybrid technique. In the postoperative radiographs, a specialist in endodontics assessed the homogeneity and adaptation of each obturation and categorize it as correct or incorrect. The data were submitted to statistical analysis to compare results obtained with the two techniques. Fisher and Chi-square tests were used and significance level was set at P<0.05. Results: Out of 5384 treatments, 4970 (92.3%) showed correct obturation. Within the 1741 treatments completed with the lateral condensation technique, 1560 (89.6%) were correct while within the 3634 where a hybrid technique was used, 3410 (93.6%) were correct. When the whole sample was considered (sum of treatment carried out during each of the academic years) a statistically significant difference (P<0.01) favoring the hybrid technique was found. The difference in incorrect cases can be estimated to be between 2.3% and 5.7% with 95% confidence. Conclusions: The radiographic evaluation completed by undergraduate students in extracted teeth showed a high percentage of correct fillings. The use of the hybrid technique showed, in general, better compaction of the obturation material than the lateral condensation technique (AU)


Assuntos
Humanos , Obturação do Canal Radicular/métodos , Tratamento do Canal Radicular/métodos , Tratamento do Canal Radicular/estatística & dados numéricos , Dente não Vital/diagnóstico por imagem , Educação Pré-Odontológica , Argentina , Análise Estatística , Adaptação Marginal Dentária
12.
Braz Oral Res ; 33: e049, 2019 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-31141039

RESUMO

The aim of the present study was to assess the penetration capacity of two endodontic cements, Endosequence BC Sealer and AH Plus, in artificial lateral canals. Twenty-six two-rooted, maxillary first premolars were instrumented to size 40.06 using K3 files. In each root, six lateral canals of two diameters (0.06 and 0.10 mm) were created with a working length of 2, 4, and 6 mm. The specimens were randomly divided into two groups according to the endodontic cement to be used (Endosequence BC Sealer and AH Plus) and obturated by the single-cone technique. The specimens were imaged by digital periapical radiography and scores from 0 to 4 were attributed according to the degree of penetration by sealers into the lateral canals. Data were analyzed statistically by Kruskal-Wallis and Student-Newman-Keuls tests, and a significance level of p < 0.05 was adopted. No significant difference was observed between the two endodontic cements used to fill the simulated lateral canals (p > 0.05). The diameter of lateral canals only influenced the capacity of the Endosequence BC Sealer in filling the canals, and presented greater penetration in the lateral canals of diameter 0.10 mm (p < 0.05). We concluded that the bioceramic endodontic cement Endosequence BC Sealer presented similar ability as AH Plus to fill simulated lateral canals.


Assuntos
Fosfatos de Cálcio/química , Cerâmica/química , Cavidade Pulpar/efeitos dos fármacos , Resinas Epóxi/química , Óxidos/química , Materiais Restauradores do Canal Radicular/química , Silicatos/química , Combinação de Medicamentos , Humanos , Teste de Materiais , Distribuição Aleatória , Valores de Referência , Reprodutibilidade dos Testes , Obturação do Canal Radicular/métodos , Estatísticas não Paramétricas
13.
J Endod ; 45(3): 322-326, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30803540

RESUMO

INTRODUCTION: The aim of the present study was to compare sonic activation using EDDY (VDW, Munich, Germany), passive ultrasonic irrigation (PUI), and mechanical activation using the XPendo Finisher (FKG Dentaire, La Chaux-des-Fonds, Switzerland) for the removal of calcium hydroxide from artificial grooves in straight root canals. METHODS: The root canals of 90 human maxillary incisors with straight root canals were prepared using Mtwo files (VDW) up to size 40/.04, and the teeth were split longitudinally. A lateral groove in the apical or coronal part was prepared in each root half and filled with calcium hydroxide, and the root halves were reassembled. Five groups were established according to the removal techniques: group A, the XPendo Finisher; group B, EDDY; group C, PUI; group D, manual irrigation with a syringe; and group E, no irrigation (the control group). The activation procedures were performed for 30 seconds with 3 mL sodium hypochlorite 3% as the irrigant. The cleanliness of the grooves was scored under 10× magnification. The median of scoring was analyzed using the Kruskal-Wallis test (P = .05). RESULTS: All activation techniques were significantly more effective in the removal of calcium hydroxide than manual irrigation (P < .05). Regarding the apical groove, EDDY and PUI were significantly more effective in the removal of calcium hydroxide than the XPendo Finisher (P < .05). No difference was found for the coronal groove (P > .05). CONCLUSIONS: EDDY and PUI were significantly more effective in the removal of calcium hydroxide than the XPendo Finisher regarding the apical region. Manual irrigation was significantly less effective than all activation techniques.


Assuntos
Hidróxido de Cálcio , Irrigantes do Canal Radicular , Preparo de Canal Radicular/instrumentação , Irrigação Terapêutica/instrumentação , Ultrassom , Hidróxido de Cálcio/efeitos adversos , Humanos , Irrigantes do Canal Radicular/efeitos adversos , Obturação do Canal Radicular/métodos , Preparo de Canal Radicular/métodos , Irrigação Terapêutica/métodos
14.
J Indian Soc Pedod Prev Dent ; 37(1): 75-79, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30804311

RESUMO

Introduction: Pulpectomy has been a treatment of choice in all necrotic primary teeth. Advancing technology has brought the rotary system to reduce the manual dexterity and improve the quality of treatment for pulpectomy. Advancing technology in pediatric dentistry should be used for the better treatment protocol. Aim: The aim of this study is to compare the obturation quality and instrumentation time after root canal instrumentation with rotary Kedo-S files, hand K-files, and H-files in primary molars. Materials and Methods: A randomized control trial where pulpectomy was performed on 75 primary molars equally distributed for instrumentation with K-file, H-files rotary Kedo-S files, respectively. The instrumentation time and obturation quality were noted. Results: Kedo-S files showed the least instrumentation time with better obturation quality as compared to other two groups (P < 0.001). Conclusion: Pediatric rotary files Kedo-S has better obturation quality in minimum instrumentation time.


Assuntos
Obturação do Canal Radicular/instrumentação , Criança , Pré-Escolar , Método Duplo-Cego , Feminino , Humanos , Masculino , Dente Molar/cirurgia , Duração da Cirurgia , Obturação do Canal Radicular/métodos , Obturação do Canal Radicular/normas , Dente Decíduo/cirurgia
15.
Pesqui. bras. odontopediatria clín. integr ; 19(1): 3902, 01 Fevereiro 2019. tab, graf
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-997921

RESUMO

Objective: To investigate the longevity of endodontic treatments and the survival of endodontic re-treatments performed in primary teeth. Material and Methods: The sample included endodontic treatments and re-treatments conducted in anterior and posterior primary teeth without sedation or general anesthesia among children attending a university dental service. Information collected retrospectively from clinical records was used for analyzing data. The Kaplan-Meier estimator test was used to analyze the longevity and survival of endodontic treatment and re-treatments, respectively. Results: A total of 73 patients with endodontic therapy in primary teeth were included in the study, and 116 teeth were analyzed. After one year, the longevity of endodontic treatments performed on primary teeth was 65.74% with an annual failure rate (AFR) of 34.2%. From 47 endodontic treatment failures, 14 teeth (29.8%) were endodontically re-treated. When the endodontic re-treatment was considered as survival, the longevity of treatments reached 68.06% with 31.9% of AFR after one year of follow-up. There was a significant increase in functional tooth retention in those patients that received an endodontic re-treatment (p<0.001). Retreatment provided an additional mean survival time of 8.3 months. Conclusion: Endodontic treatments performed in primary teeth presented a limited longevity. Endodontic re-treatment is a more conservative alternative for endodontically treated primary teeth that have failed and significantly increase tooth retention.


Assuntos
Humanos , Criança , Adolescente , Pulpectomia/métodos , Obturação do Canal Radicular/métodos , Tratamento do Canal Radicular/instrumentação , Dente Decíduo , Registros Médicos , Serviços de Saúde Bucal , Brasil , Análise de Sobrevida , Estudos Retrospectivos , Estatísticas não Paramétricas
16.
Scanning ; 2019: 5240430, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31969970

RESUMO

Objective: This study is aimed at determining (1) the effect of root-end resection, ultrasonic root-end preparation, and root-end filling on the incidence of crack formation and propagation by using a digital microscope (DM) and optical coherence tomography (OCT) and (2) the performance of OCT on the detection of cracks by comparing with microcomputed tomography (micro-CT) as a reference standard. Methodology: Thirty extracted lower incisors were endodontically treated and subjected to root-end resection and ultrasonic root-end cavity preparation. Then, the teeth were divided into three groups (n = 10, each), and the root-end cavity was either left unfilled or filled with mineral trioxide aggregate (MTA) or super-EBA. The resected surface was observed with OCT and DM after the root-end resection, ultrasonic root-end preparation, and root-end filling, and the frequency of incomplete and complete cracks were recorded. The observation was repeated after two weeks, one month, and two months, and micro-CT scans after two months were taken as the gold standard. Results: The DM results show dentinal crack formation in 47% of the samples following root-end resection and in 87% following ultrasonic preparation. After the ultrasonic preparation, no existing crack propagated to a complete crack, but new cracks were formed. MTA and super-EBA had no effect on crack formation. The Spearman correlation coefficient between OCT and DM was 0.186 (very weak correlation; p = 0.015). Sensitivity and specificity in comparison to micro-CT were 0.50 and 0.55 in OCT and 1.00 and 0.35 in DM, respectively. McNemar's test showed a significant difference between OCT and DM (p < 0.05). Conclusion: Apical resection and ultrasonic preparation could form dentinal cracks. OCT and DM showed different detection frequencies of cracks with very weak correlation. DM showed superior sensitivity compared with OCT.


Assuntos
Obturação do Canal Radicular/efeitos adversos , Obturação do Canal Radicular/métodos , Preparo de Canal Radicular/efeitos adversos , Preparo de Canal Radicular/métodos , Sonicação/efeitos adversos , Sonicação/métodos , Raiz Dentária/lesões , Humanos , Incidência , Incisivo , Microscopia , Tomografia de Coerência Óptica , Microtomografia por Raio-X
17.
J Prosthodont ; 28(1): e332-e336, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29578300

RESUMO

PURPOSE: The apical seal provided by a root canal filling may be breached via coronal leakage. This study aimed to compare the teeth restored with custom-made cast metal posts and cores cemented with different luting agents in terms of coronal microleakage after thermocycling. MATERIALS AND METHODS: This in vitro study was conducted on 32 extracted single-canal teeth. Root canals were prepared by step-back technique and filled with gutta percha and sealer. The coronal 7 mm of gutta percha was removed, and post space was prepared using peeso reamers #2 and #3 consecutively. After fabricating the acrylic resin patterns of the posts and cores, they were cast using Ni-Cr metal alloy. The specimens were divided into 4 groups in which the castings were cemented using one of the following luting agents: zinc phosphate (ZP), glass ionomer (GI), Panavia F 2.0, and Speed CEM. After cementation, the teeth were immersed in distilled water and incubated for 7 days. Then, the teeth were subjected to thermocycling, immersed in silver nitrate for 6 hours, and finally sectioned. The degree of dye penetration into the coronal part of the specimens was measured using a stereomicroscope. Data were analyzed using Kruskal-Wallis and Mann-Whitey U tests with significance level of 0.05. RESULTS: The median microleakage in ZP, Speed CEM, GI, and Panavia were 171.89, 114.76, 26.51, and 20.02 µm, respectively. Pairwise comparisons among GI and ZP, GI, and Speed CEM, ZP and Panavia, ZP and Speed CEM, and Panavia and Speed CEM groups yielded significant differences (p < 0.05). CONCLUSION: Complete coronal seal was not achieved with any of the luting agents. The highest and the lowest degree of microleakage was yielded by ZP and Panavia luting agents, respectively.


Assuntos
Cimentos Dentários/uso terapêutico , Infiltração Dentária/etiologia , Restauração Dentária Permanente/métodos , Técnica para Retentor Intrarradicular/efeitos adversos , Restauração Dentária Permanente/efeitos adversos , Humanos , Técnicas In Vitro , Obturação do Canal Radicular/efeitos adversos , Obturação do Canal Radicular/métodos
18.
Clin Oral Investig ; 23(1): 337-343, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-29675760

RESUMO

INTRODUCTION: To compare, by Micro-CT and confocal laser scanning microscopy (CLSM), the ability of the Wave One Gold and Wave One systems to remove filling material from mesial canals of mandibular molars, effective time spent; quantity of extruded material, and percentage of sealer in the dentinal tubules after retreatment and re-obturation procedures. MATERIALS AND METHODS: Ten first mandibular molars (n = 20 mesial canals) were prepared and filled with gutta-percha and Endofill sealer mixed with Rhodamine B dye using the single cone technique. After 7 days, the canals were scanned using a high-definition micro-computer tomography with 19-mm voxel size and divided into two groups (n = 10) according to the system used in retreatment: group 1, Wave One (WO), and group 2, Wave One Gold (WG). After removing filling material with the primary file of each system, the WO 40/.08 and WG 35/.06 files were used. After using each file, a new scanning was performed and the residual filling material and extruded filling material were measured. The effective time spent to remove the canal filling was measured after each instrument. After retreatment, the teeth were re-obturated with gutta-percha and AH Plus sealer mixed with fluorescein dye using the single-cone technique. The roots were sectioned at 2, 4 and 6 mm and analysed by CLSM to measure the percentage of remaining sealer and the sealer of the new root canal filling. The data were statistically compared (P < 0.05). RESULTS: Both systems presented a similar volume of filling material remaining in the canals after the use of the two instruments, similar residual and new material in the dentinal tubules, and similar extrusion of material (P > 0.05). When using WO 25, the operator spent significantly less effective time than when using WG 25 (P < 0.05); however, use of WG 35 and WO 40 required a similar time to remove filling material from the canals (P > 0.05). CONCLUSIONS: Neither of the two systems removed all the filling material. The WG system presented similar ability in removing filling and extruded material in comparison with WO system. The effective time spent was shorter for WO 25 than for WG 25. CLINICAL RELEVANCE: Wave One Gold can be an alternative to perform retreatment considering that in comparison with Wave One, there was no difference in filling material removal capacity and extruded materials. There was only difference in the effective time spent, in which the operator spent more time with WG 25 than with WO 25.


Assuntos
Microscopia Confocal , Dente Molar/diagnóstico por imagem , Dente Molar/cirurgia , Obturação do Canal Radicular/métodos , Microtomografia por Raio-X , Instrumentos Odontológicos , Guta-Percha/química , Humanos , Técnicas In Vitro , Mandíbula , Retratamento , Materiais Restauradores do Canal Radicular/química
19.
Clin Oral Investig ; 23(2): 805-811, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29872920

RESUMO

OBJECTIVES: To evaluate and compare the obturation quality of mineral trioxide aggregate (MTA) and Biodentine placed with hand condensation or indirect ultrasonic activation technique in teeth models simulating perforating internal root resorption (IRR) using micro-computed tomographic (micro-CT) imaging. MATERIALS AND METHODS: Standardized models with perforating IRR cavities were created using 40 extracted single-rooted human teeth and randomly divided into four groups (n = 10). The specimens were obturated with either MTA or Biodentine and the placement technique applied was either hand condensation or indirect ultrasonic activation. Micro-CT scans were performed for the volumetric analysis of voids and filling materials in the resorption cavities and apical portion of the specimens. Data were analyzed using one-way analysis of variance and paired t test. RESULTS: No significant difference was observed between the groups in terms of the percentage volume of filling materials (p > 0.05). The apical portion of the specimens significantly presented less percentage volume of filling materials than the resorption cavities in each group (p < 0.05). CONCLUSIONS: No placement technique produced void-free fillings in teeth with perforating IRR. There was no significant difference between the obturation quality of Biodentine and MTA. The obturation quality in the apical portion of the root canals was inferior than that in the resorption cavities. CLINICAL RELEVANCE: The obturation of the apical region of teeth with perforating IRR is challenging irrespective of the material type and placement technique.


Assuntos
Compostos de Alumínio/química , Compostos de Cálcio/química , Óxidos/química , Materiais Restauradores do Canal Radicular/química , Obturação do Canal Radicular/métodos , Reabsorção da Raiz/diagnóstico por imagem , Silicatos/química , Microtomografia por Raio-X , Combinação de Medicamentos , Humanos , Técnicas In Vitro , Distribuição Aleatória , Obturação do Canal Radicular/instrumentação , Ultrassom
20.
J Int Med Res ; 47(1): 470-480, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30514145

RESUMO

OBJECTIVE: The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of two root canal obturation techniques by using micro-computed tomography imaging and a push-out test. METHODS: The root canals of 40 human maxillary premolar teeth were instrumented and divided into four groups: (A) single cone (SC) followed by immediate post space preparation, (B) continuous wave of condensation (CWC) followed by immediate post space preparation, (C) SC followed by delayed post space preparation, and (D) CWC followed by delayed post space preparation. Micro-CT scans were performed for volumetric analysis of voids and filling materials in the apical 4-mm portion. A push-out test was performed, and failure modes (adhesive, cohesive, or mixed) were assessed. Data were analyzed using the Kruskal-Wallis test and one-way analysis of variance. RESULTS: No significant differences were observed among the four groups in terms of the percentage volume of voids of the apical 4 mm or the bond strength of apical gutta-percha. CONCLUSIONS: The percentage volume of voids and bond strength of apical gutta-percha were similar and were not significantly influenced by the timing of post space preparation or the obturation technique.


Assuntos
Dente Pré-Molar/cirurgia , Cavidade Pulpar/cirurgia , Guta-Percha/química , Obturação do Canal Radicular/métodos , Análise de Variância , Dente Pré-Molar/patologia , Cavidade Pulpar/diagnóstico por imagem , Cavidade Pulpar/patologia , Análise de Falha de Equipamento/métodos , Humanos , Maxila/diagnóstico por imagem , Maxila/cirurgia , Obturação do Canal Radicular/instrumentação , Fatores de Tempo , Extração Dentária , Microtomografia por Raio-X
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