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|Title:||One- versus two-visit endodontic treatment of teeth with apical periodontitis: A histobacteriologic study|
Portilla-De Buen, E.
|Abstract:||HLA-A and HLA-B genes were typed by DNA sequencing in a mestizo population from Guadalajara, Jalisco, Mexico. Thirty-seven HLA-A and 51 HLA-B alleles were observed in 103 samples. The common typical Amerindian alleles (>5%) and haplotypes (?2.0%) found were A*02010101, *24020101, *310102, B*350101, and *4002, and A*310102-B*4002, A*240201-B*350101, and the typical European alleles were A*010101, *29010101, B*1402, B*180101, and A*020101-B*1402, A*020101-B*510101, and A*3002-B*180101. This reflects the blending of the two main parental populations of mestizos: Amerindian and Iberian. Mexicans were found to be relatively closer to the Portuguese than to Spaniards. This proximity may indicate a larger Portuguese influence in Mexicans than previously considered. Present data contribute to the understanding of the genetic structure in Mexico. " 2005 Blackwell Munksgaard.",,,,,,"10.1111/j.1399-0039.2005.00495.x",,,"http://hdl.handle.net/20.500.12104/41943","http://www.scopus.com/inward/record.url?eid=2-s2.0-27944495674&partnerID=40&md5=3a629477a551d6bfecde295348323d74",,,,,,"6",,"Tissue Antigens",,"666|
WOS",,,,,,"Genetic admixture; HLA-A; HLA-B; Mexican mestizos; Sequence-based typing; Western Mexico",,,,,,"HLA-A and HLA-B allele frequencies in a mestizo population from Guadalajara, Mexico, determined by sequence-based typing",,"Article" "45138","123456789/35008",,"Vera, J., Department of Endodontics, University of Tlaxcala, Tlaxcala, Mexico; Siqueira Jr., J.F., Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil; Ricucci, D., Cetraro, Italy; Loghin, S., Cetraro, Italy; Fernández, N.; Flores, B., Department of Endodontics, University of Veracruz-UAV, Veracruz, Mexico; Cruz, A.G., Department of Dental Clinics, University of Guadalajara, Guadalajara, Mexico",,"Vera, J.
Siqueira Jr., J.F.
Cruz, A.G.",,"2012",,"Introduction: This study analyzed the in vivo microbiological status of the root canal systems of mesial roots of mandibular molars with primary apical periodontitis after 1- or 2-visit endodontic treatment. Methods: Mesial root canals were instrumented by using either a combination of K3 and LightSpeed instruments (mesiobuccal canals) or the ProTaper system (mesiolingual canals), with 5% NaOCl irrigation. Patency files were used. Smear layer was removed, and a final rinse with 5 mL of 2% chlorhexidine was performed. In the 2-visit group (7 roots, 14 canals), canals were medicated with calcium hydroxide for 1 week and then obturated by using the continuous wave of compaction technique. In the 1-visit group (6 roots, 12 canals), canals were immediately obturated after chemomechanical procedures. Teeth were extracted 1 week after root canal instrumentation and processed for histobacteriologic analysis. Results: In the 1-visit group, no case was completely free of bacteria; residual bacteria occurred in the main root canal (5 of 6 cases), isthmus (5 of 6), apical ramifications (4 of 6), and dentinal tubules (5 of 6). In the 2-visit group, 2 cases were rendered bacteria-free; residual bacteria were found in the main canal only in 2 cases (none of them with persistent dentinal tubule infection), in the isthmus (4 of 7 cases), and in ramifications (2 of 7). The 2 instrumentation techniques performed similarly. When filling material was observed in ramifications, it was usually intermixed with necrotic tissue, debris, and bacteria. Conclusions: The 2-visit protocol by using an interappointment medication with calcium hydroxide resulted in improved microbiological status of the root canal system when compared with the 1-visit protocol. Residual bacteria were more frequent and abundant in ramifications, isthmuses, and dentinal tubules when root canals were treated without an interappointment medication. Apical ramifications and isthmuses were never completely filled. The use of an antibacterial interappointment agent is necessary to maximize bacterial reduction before filling. " 2012 American Association of Endodontists.
|Appears in Collections:||Producción científica UdeG|
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