ABSTRACT
Objective@# To investigate the adverse reactions of resin cement used for dentin bonding and its influencing factors.@*Methods@# Patients with dental defects treated with resin cement dentin adhesive for direct composite resin repair or full crown indirect repair were selected as the research objects. The occurrence and causes of adverse reactions, such as dental pulp lesions, soft tissue adverse reactions, and restoration loosening and falling off 7 days, 1 month, 3 months, 6 months, and 1 year after treatment, were analyzed retrospectively.@*Results @# Among the 14 776 teeth of 5 971 patients who used resin cement dentin adhesive, 580 cases (3.93%) had adverse reactions. Univariate analysis showed that the incidence of adverse events was highest in teeth with the "full crowns (fixed partial dentures)" restoration type at 7 days, 1 month, and 12 months after treatment. At 7 days after treatment, the incidence of adverse events was the highest in teeth with a preparation depth of "near pulp after preparation". At 7 days and 3 months after treatment, the incidence of adverse events was the highest in teeth with " dentin conditioner-adhesive-resin" treatment of the bonding surface. Multivariate analysis indicated that pulp perforation and pulp capping after tooth preparation were risk factors for adverse events 7 days after treatment (OR=2.610), and the “dentin primer-adhesive-resin” bonding surface treatment method was a protective factor for adverse events 7 days and 3 months after treatment (OR<1). @*Conclusion@#affect the occurrence of adverse events. pulp perforation, and pulp capping after tooth preparation, and self-etching bonding may contribute to adverse reactions.
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Objective @# To investigate the clinical effects of different restoration methods on large area defect of deciduous molars. @*Methods @#A total of 150 deciduous molars were selected and randomly divided into three groups: A, B and C. Group A was repaired with glass ionomer and compound resin, B group was repaired by Hall technique, and C group was repaired with metal preformed crown. The successful rate of restoration in 6 and 12 months was compared between the three groups.@*Results@#There was no significant difference between three groups in A, B and C (P > 0.05) in 6 months; the successful rate of 12 months repair in group B and C was significantly higher than that in group A (P < 0.05). @*Conclusion @#The success rate of Hall technique and metal performed crown is higher than that of glass ionomer and composite resin on the repair of large defects of deciduous molars.
ABSTRACT
Objective@#To investigate the clinical effects of different restoration methods on large area defect of deciduous molars. @*Methods @#A total of 150 deciduous molars were selected and randomly divided into three groups: A, B and C. Group A was repaired with glass ionomer and compound resin, B group was repaired by Hall technique, and C group was repaired with metal preformed crown. The successful rate of restoration in 6 and 12 months was compared between the three groups. @*Results @#There was no significant difference between three groups in A, B and C (P > 0.05) in 6 months; the successful rate of 12 months repair in group B and C was significantly higher than that in group A (P < 0.05).@*Conclusion @#The success rate of Hall technique and metal performed crown is higher than that of glass ionomer and composite resin on the repair of large defects of deciduous molars.
ABSTRACT
La incorporación de fibras de refuerzo a resinas compuestas se ha convertido en una alternativa de tratamiento protésico altamente conservador. De esta investigación fue evaluar la resistencia flexural (RF) de una resina compuesta indirecta reforzada con tres diferentes marcas comerciales de fibras de vidrio, variando su ubicación y sometidas a envejecido físico ó químico. Se fabricaron 98 especímenes de resina compuesta Gradia (GC-America Inc.) de 22 mm x 2 mm x 3 mm; a 14 muestras no se les colocó fibras (SF), se almacenaron en agua destilada por 60 días, luego se subdividieron en dos grupos de 7 muestras,G1 - SFA y G2 - SFT el cual se sometió a termociclado (3000 ciclos de 5°/55°C en intervalos de 1 min); las otras 84 muestras se reforzaron fibras unidireccionales: 42 muestras para ser almacenadas en agua por 60 días (CFA), divididas en dos sub-grupos de 21, en relación a la ubicación de la fibra en la zona de compresión (CFAC) ó tracción (CFAT); finalmente en tres grupos de 7, dependiendo de la marca; Fibrex-Lab® (Angelus) los grupos G3 - CFACFLab y G6 - CFATFLab, FibreKor® (Jeneric/Penton) los grupos G4 - CFACFKor y G7 - CFATFKor y Vectris® (Ivoclar/Vivadent) los grupos G5 - CFACVectris y G8 - CFATVectris. Las 42 restantes después del almacenamiento en agua se sometieron al termociclado , se dividieron en dos subgrupos de 21, en relación a la ubicación de la fibra en la zona de compresión (CFTC) ó de tracción (CFTT); finalmente se dividió en tres grupos de 7, entonces Fibrex-Lab® conformó los grupos G9 - CFTCFLab y G12 - CFTTFLab, FibreKor® los grupos G10 - CFTCFKor y G13 - CFTTFKor y Vectris® los grupos G11 - CFTCVectris y G14 - CFTTVectris. Las muestras fueron sometidas a la prueba de flexión de tres puntos hasta su fractura, en maquina de pruebas universales (Shimadzu AGS-J) a una velocidad de 1mm/min. Los datos fueron recolectados, tabulados en hoja de cálculo y luego analizados con un estadístico de t de student....
The incorporation of reinforce fibers to composite has turned into an alternative of high conservative prosthetic treatment. The aim of this study was to evaluate the flexure strength (RF) of a indirect reinforce composite using three fiber glass commercial brands, varying the location and submitted to physical o chemical aging. 98 specimen were made of 22 mm x 2 mm x 3 mm Gradia resin compound (GC-America Inc.); 14 samples were not reinforce with fiber glass (SF), They were store in distilled water for 60 days then divided in 2 groups of 7 samples, G1 - SFA and G2 - SFT was thermocycled (3000 cycles of 5 °/55°C in intervals of 1 min); the other 82 samples were reinforce with unidirectional fibers: 42 to be stored in distilled water for 60 days (CFA), divided in 2 subgroups of 21, in relation with the localization of the fiber on the compression zone (CFAC) or traction (CFAT); Finally divided in 3 groups of 7, depending on the brand; Fibrex-Lab® (Angelus) the groups G3 - CFACFLab and G6 - CFATFLab, FibreKor® (Jeneric/Penton) the groups G4 - CFACFKor and G7 - CFATFKor and Vectris® (Ivoclar/Vivadent) the groups G5 - CFACVectris and G8 - CFATVectris. The remaining 42 samples after storage in water were submitted to thermocycling, divided in 2 subgroups of 21, in relation with the localization of the fiber on the compression zone (CFTC) or traction (CFTT); Finally divided in 3 groups of 7 then G9 was conformed Fibrex-Lab® CFTCFLab and G12 - CFTTFLab, FibreKor® the groups G10 - CFTCFKor and G13 - CFTTFKor and Vectris® the groups G11 - CFTCVectris and G14 - CFTTVectris. The samples were submitted to the three points flexion test until fracture, in a universal testing machine (Shimadzu AGS-J) to a speed of 1mm/min. The information was gathered, tabulated in spreadsheet and then analyzed with a statistician t of student to determine differences between the groups without fibers and 3 factors ANOVA on the reinforced groups for the varying location...
Subject(s)
Dental Prosthesis , Cellular Senescence , Casts, Surgical/adverse effects , Composite Resins/therapeutic use , DentistryABSTRACT
We began to restore tetracycline stained teeth with a visible light cured compound resin in 1986. Thirty-three cases, a total number of 86teeth were cured with follow-up for 6-12 months. The beneficial rate was over 90% This paper presents the therapeutic method and its procedures for three (?) of tetracycline stained teeth. and this paper also discusses the cause of fail ure cases. We suggest the conclusion that this method is a simple, better one, with some advantages: no need for polishing teeth or polishing little, cavities well closing and no obvious stimulation to the dental pulps.