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Fabiana Soares Grecca Roberto Brand?o Garcia Clóvis Monteiro Bramante Ivaldo Gomes de Moraes Norberti Bernardineli 《Journal of applied oral science : revista FOB》2007,15(2):89-93
Objective:
The efficiency of rotary, manual and ultrasonic root canal instrumentation techniques was investigated in proximally flattened root canals.Material and Methods:
Forty human mandibular left and right central incisors, lateral incisors and premolars were used. The pulp tissue was removed and the root canals were filled with red die. Teeth were instrumented using three techniques: (i) K3 and ProTaper rotary systems; (ii) ultrasonic crown-down technique; and (iii) progressive manual technique. Roots were bisected longitudinally in a buccolingual direction. The instrumented canal walls were digitally captured and the images obtained were analyzed using the Sigma Scan software. Canal walls were evaluated for total canal wall area versus noninstrumented area on which dye remained.Results:
No statistically significant difference was found between the instrumentation techniques studied (p<0.05).Conclusion:
The findings of this study showed that no instrumentation technique was 100% efficient to remove the dye. 相似文献4.
Quintana Ramiro Martins Jardine Alexander Pompermayer Grechi Tuane Regina Grazziotin-Soares Renata Ardenghi Diego Machado Scarparo Roberta Kochenborger Grecca Fabiana Soares Kopper Patrícia Maria Poli 《Clinical oral investigations》2019,23(3):1359-1366
Clinical Oral Investigations - This study aims to compare the bone tissue reaction, setting time, solubility, and pH of NeoMTA Plus, Biodentine (BD), and MTA Angelus (MTA-A). Initial and final... 相似文献
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Radiographic evaluation of periradicular repair after endodontic treatment of dog's teeth with induced periradicular periodontitis 总被引：5，自引：0，他引：5
Grecca FS Leonardo MR da Silva LA Tanomaru Filho M Borges MA 《Journal of endodontics》2001,27(10):610-612
Eighty-four root canals of premolars from six dogs were left open for 7 days, and then sealed and followed for 45 days until periradicular periodontitis developed. The root canals were then treated endodontically using 5.25% sodium hypochlorite as the irrigating solution. After instrumentation, all root canals were filled with a calcium hydroxide-based antibacterial dressing (Calen PMCC or Calasept) that was left in place for 30 days. After this period the root canals were filled with gutta-percha cones and a root canal sealer (Sealapex or AH Plus)--group I: Calen PMCC + Sealapex; group II: Calasept + Sealapex; group III: Calen PMCC + AH Plus; and group IV: Calasept + AH Plus. Periapical radiographs of the teeth were made after root canal filling and after 90, 180, 270, and 360 days. Radiographic images were digitalized by scanning, and the Mocha program was used to measure the periapical lesions. Analysis showed that the lesions of groups I to III were statistically similar reduction in size, whereas group IV had a smaller reduction in lesion size (p < 0.05). 相似文献
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Lucas Siqueira Pinheiro Júlia Eick Iglesias Daiana Boijink Letícia Boldrin Mestieri Patrícia Maria Poli Kopper José Antônio de Poli Figueiredo Fabiana Soares Grecca 《Journal of endodontics》2018,44(7):1140-1145
Introduction
The aim of this study was to evaluate the cell viability and tissue reaction of NeoMTA Plus (NMP; Avalon Biomed Inc, Houston, TX) compared with mineral trioxide aggregate (MTA; Angelus, Londrina, PR, Brazil) and Biodentine (BD; Septodont, Saint-Maur-de-Fossés, France).Methods
Fibroblasts (3T3) were plated and exposed to 1% extract from the test material before and after setting. Cytotoxicity assessment was performed using the 3-(4,5-dimethyl-thiazoyl)-2,5-diphenyl-tetrazolium bromide and sulforhodamine B assays. In vivo evaluation consisted of polyethylene tube implantation of the materials in rat subcutaneous tissue. Histologic analysis occurred at 7, 30, and 90 days, scoring inflammatory events and collagen fiber formation. Analysis of variance and the Tukey and t tests were used for cytocompatibility assays, and the Kruskal-Wallis test followed by the Dunn test were used for biocompatibility assays (P ≤ .05).Results
The materials in the cytotoxicity assays presented greater viability after setting (P ≤ .05). NMP and MTA presented higher viability than the control (Dulbecco modified Eagle medium) on the 3-(4,5-dimethyl-thiazoyl)-2,5-diphenyl-tetrazolium bromide assay before and after setting (P ≤ .05). The sulforhodamine B assay showed that MTA and BD presented less viability than NMP and the control, and NMP was similar to the control before setting. After setting, MTA and BD presented higher viability when compared with the control group (P ≤ .05), and NMP was similar to control. Inflammatory infiltrate reduction occurred throughout the test periods for all materials. At 7 days, neutrophils were present in BD (P ≤ .05), and granuloma and giant cells were present in BD and MTA. At 30 days, BD showed intense inflammatory infiltrates and a large number of macrophages when compared with NMP, MTA, and the control (P ≤ .05). At 90 days, BD presented a thick fiber layer compared with NMP (P ≤ .05).Conclusions
NMP showed similar biocompatible behavior to MTA and BD. 相似文献9.
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Fernanda Ullmann López
msc Juliana Andréa Corrêa Travessas
msc Elaine Fachin
phd Vania Fontanella
phd Fabiana Grecca
phd 《Australian endodontic journal : the journal of the Australian Society of Endodontology Inc》2009,35(2):85-88
Root canal transportation can lead to treatment failure. A large number of methodologies for assessing root canal preparation have been tried in the past. This study compared two methods for apical transportation measurement: digitised images of longitudinal root sections and radiographs. Sixty upper molar mesiobuccal root canals prepared for endodontic treatment were assessed. The results did not demonstrate statistically significant differences between the two imaging methods used to evaluate root canal transportation. The two methods were proven to be equally reliable. 相似文献