Comparison of Postobturation Pain Experience after Apical Extrusion of Calcium Silicate- and Resin-Based Root Canal Sealers.

INTRODUCTION: This study compared the intensity of postobturation pain after unintentional apical extrusion of calcium silicate-based root canal sealers (EndoSequence BC Sealer [Brasseler USA, Savannah, GA] and Bio-C Sealer [Angelus, Londrina, PR, Brazil]) with a resin-based sealer (AH Plus; Dentsply Sirona, York, PA). METHODS: A total of 330 patients referred for root canal treatment on molar teeth with asymptomatic irreversible pulpitis were recruited. Root canals were prepared using WaveOne Gold instruments (Dentsply Sirona) in a crown-down technique and irrigated with 2% chlorhexidine gel and saline solution. Next, patients were randomly distributed into 3 groups according to the root canal sealer used (n = 110): AH Plus, BC Sealer, and Bio-C Sealer. Root canal filling was then accomplished with a vertical compaction technique. Patients presenting with an unintentional extrusion of sealers (n = 13/group) were assessed for postobturation pain experience using a visual descriptor scale ranging from 0-10 at 6-, 12-, 24-, and 48-hour and 1-week intervals after treatment. Mixed analysis of variance repeated measures were used to assess the results (α = 0.05). RESULTS: The extrusion rate was similar for all sealers (~12%). There was no significant difference in the postobturation pain results between the root canal sealers evaluated (P > .05). However, after the time interval of 12 hours, AH Plus (P = .04073) and Bio-C Sealer (P = .04327) demonstrated a significant reduction in pain, whereas BC Sealer did not show differences in pain intensity, even in the maximum period evaluated of 1 week (P > .05). CONCLUSIONS: The occurrence of unintentional apical extrusion of calcium silicate-based root canal sealers presents similar postoperative pain results compared with resin-based sealers with low-intensity pain.

Effect of endodontic sealers on tooth color.

OBJECTIVES: One of the goals of endodontic treatment is the adequate filling of the root canal,which is often done using gutta-percha and sealer. It has been reported that sealer remnants in the coronary pulp chamber cause tooth color changes. Therefore, this study was designed to examine the effect of endodontic sealer remnants on tooth color, testing the hypothesis that sealers cause coronal color changes. METHODS: Forty single-rooted human teeth were endodontically treated leaving excess sealer material in the coronary pulp chamber. The specimens were divided into four groups (n = 10) according to the endodontic sealer used (AH, AH Plus; EF, Endofill; EN,endome´ thasoneN; and S26, Sealer 26). Teeth were stored at 37 8C moist environment.Color coordinates (L*a*b*) were measured with a spectrophotometer before endodontic treatment(baseline-control), 24 h and 6 months after treatment. L*a*b* values were used to calculate color changes (DE). Data were statistically analyzed using Kruskal­Wallis and Mann­Whitney-U tests. RESULTS: Color changes were observed for all groups with S26 and EN producing the greatest mean DE values after 6 months. CONCLUSION: Endodontic sealer remnants affect tooth color confirming the experimental hypothesis. CLINICAL SIGNIFICANCE: This study examined the effect of endodontic sealer remnants on tooth color, and observed that after 6 months, the sealers produced unacceptable color changes.

Hipersensibilidad retardada hacia componentes de las prótesis dentales e inflamación crónica de la mucosa oral / Retarded hypersensitivity about component of the dental prosthesis and cronic inflammation of the oral mucous

Se describen cuatro pacientes con queilitis o gingivitis o ambas, persistentes por más de un año. Las biopsias en todos los casos presentaban un padrón inflamatorio crónico inespecífico donde no se identificaban agentes infecciosos o de otra etiología. Todos los pacientes tenían arreglos en su dentadura, con prótesis fijas o móviles o ambas, años antes de comenzar con la sintomatología inflamatoria. Por medio del test del parche se comprobó en cada uno de los pacientes hipersensibilidad retardada específica hacia uno o más elementos constituyentes de las prótesis. Esto último, junto con la desaparición de los síntomas cuando se procedía a una terapia con corticoides o cuando se evitaba el contacto de la prótesis coon la mucosa oral, dan algoritmos para llegar al diagnóstico de hipersensibioidsad retardada como etiología de la inflamación crónica de la mucosa oral

Hipersensibilidad retardada hacia componentes de las prótesis dentales e inflamación crónica de la mucosa oral / Retarded hypersensitivity about component of the dental prosthesis and cronic inflammation of the oral mucous

Se describen cuatro pacientes con queilitis o gingivitis o ambas, persistentes por más de un año. Las biopsias en todos los casos presentaban un padrón inflamatorio crónico inespecífico donde no se identificaban agentes infecciosos o de otra etiología. Todos los pacientes tenían arreglos en su dentadura, con prótesis fijas o móviles o ambas, años antes de comenzar con la sintomatología inflamatoria. Por medio del test del parche se comprobó en cada uno de los pacientes hipersensibilidad retardada específica hacia uno o más elementos constituyentes de las prótesis. Esto último, junto con la desaparición de los síntomas cuando se procedía a una terapia con corticoides o cuando se evitaba el contacto de la prótesis coon la mucosa oral, dan algoritmos para llegar al diagnóstico de hipersensibioidsad retardada como etiología de la inflamación crónica de la mucosa oral