Submitted by Nivaldo Melo (nivaldo.melo@ufvjm.edu.br) on 2015-11-19T16:55:42Z No. of bitstreams: 2 vanessa_cruz_silva_fernandes.pdf: 1170469 bytes, checksum: 4c17b7d56cb5f5b99dca08404cbe93c5 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-19T17:53:53Z (GMT) No. of bitstreams: 2 vanessa_cruz_silva_fernandes.pdf: 1170469 bytes, checksum: 4c17b7d56cb5f5b99dca08404cbe93c5 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-11-19T17:53:54Z (GMT). No. of bitstreams: 2 vanessa_cruz_silva_fernandes.pdf: 1170469 bytes, checksum: 4c17b7d56cb5f5b99dca08404cbe93c5 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2014 / Introdu??o: Terapeuticamente a constri??o apical ? refer?ncia do comprimento de trabalho (CT) dos canais radiculares (CR). Objetivo: Avaliar clinicamente fatores associados ? acur?cia do localizador apical eletr?nico (LAE) Apex Finder A.F.A. 7005 na determina??o da constri??o apical. Metodologia: Para cada CR, uma lima tipo Kerr selecionada e acoplada ao LAE foi inserida intracanalmente at? obter est?vel marca??o, 1 mm no painel digital (LCD). Na radiografia periapical correspondente ? dist?ncia da ponta da lima ao v?rtice dent?rio foi categorizada como precisa (0.5 a 1.5 mm), aceit?vel (0 a 2 mm) ou imprecisa (demais medidas). A concord?ncia foi analisada em fun??o do grupo de dentes, estado pulpar e periapical, di?metro do CR e di?metro da lima explorat?ria. A influ?ncia das vari?veis independentes foi analisada pelos testes Mann-Whitney, Kruskal-Wallis e Correla??o de Sperman (p<0,05). Resultados: Os dentes anteriores (n=21), pr?-molares (n=20) e molares (n=33) proveram 147 CR, dos quais 43.5% eram atr?sicos. Em 102 (69,4%) a polpa estava necr?tica, dentre os quais 70 (47,6%) apresentavam radiolucidez periapical. Obteve-se elevada concord?ncia entre a medida eletr?nica e radiogr?fica. Verificou-se que 70,7% e 94,5% das medidas foram do tipo precisas ou aceit?veis, respectivamente. A acur?cia das medidas correlacionou-se positivamente com as limas explorat?rias e negativamente com o di?metro do CR. Nenhuma vari?vel independente influenciou a acur?cia do LAE (p>0.05). Conclus?o: O Apex Finder proveu medidas de CT com elevada aceitabilidade cl?nica na regi?o da constri??o apical, independentemente do estado pulpar, grupo dentes, estado periapical ou di?metro dos canais radiculares. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Odontologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT of root canals (RC). Objective: To evaluate clinically associated factors with the accuracy of the electronic apex locator (EAL) Apex Finder A.F.A. 7005 in determination of apical constriction. Methodology: For each RC, one selected file type Kerr and coupled at EAL was inserted intracanal until stablished marking, 1 mm on the liquid-crystal display (LCD). The periapical radiograph correspondent the distance of the file tip to the tooth apex was classified as specify (0.5 to 1.5 mm), acceptable (0 to 2 mm) or imprecise (other steps). The agreement was analyzed according to the group of teeth, pulpal and periapical status, RC diameter and exploratory file diameter. The influence of independent variables was analyzed by Mann-Whitney, Kruskal-Wallis and Spearman correlation (p <0.05) tests. Results: The anterior teeth (n=21), premolars (n=20) and molars (n=33) provided RC 147, of which 43.5% were atresic. In 102 (69.4%) the pulp was necrotic, among which 70 (47.6%) had periapical radiolucency. High agreement between the electronic and radiographic measurement was obtained. It was found that 70.7% and 94.5% of the measurements are accurate and acceptable type, respectively. The accuracy of measurements correlated positively with exploratory files and negatively with the diameter of RC. No independent variable influenced the accuracy of LAE (p> 0.05). Conclusion: The Apex Finder provided measures of WL with high clinical acceptability in apical constriction, regardless of status pulp, tooth group, periapical status or diameter of the root canals.