title: Morphometrical analysis of cleaning capacity of a hybrid instrumentation in mesial flattened root canals.
abstract: The cleaning capacity of hybrid and rotary instrumentation techniques in mesial flattened canals of mandibular first molars was evaluated by morphometrical analysis in this study. Twenty human mandibular first molars were randomly assigned into two groups, according to instrumentation technique, as follows: group 1, instrumentation with ProTaper Starter Kit (Dentsply/Maillefer) rotary system; group 2, manual instrumentation using K files (Dentsply/Maillefer) by crown-down technique in middle and apical thirds, cervical preparation with Gates-Glidden #1 and #2 (Dentsply/Maillefer) burs, and to finalise the preparation, ProTaper F2 and F3 rotary files. Serial transverse cross-sections (5 µm) of the apical third, stained with hematoxylin and eosin, were analysed at 100× original magnification. The images were submitted to morphometrical analysis with an integration grid to determine the percentage of root canal area with debris. Statiscal analysis (t-Student, P < 0.05) showed significant difference between the techniques (P < 0.05), although neither completely cleaned the root canal.
authors: Department of Endodontics, Manaus School of Dentistry, Amazonas Federal University, Brazil.
authors: Leonardo Cantanhede Oliveira
authors: LC
authors: Gonçalves
authors: Emilio Carlos Sponchiado
authors: EC
authors: Junior
authors: Matheus Franco
authors: MF
authors: da Frota
authors: André Augusto Franco
authors: AA
authors: Marques
authors: Lucas da Fonseca Roberti
authors: Lda F
authors: Garcia
mesh_terms: D019412:Anatomy, Cross-Sectional; D004396:Coloring Agents; D003722:Dental Alloys / Q000737:chemistry; D003786:Dental Pulp Cavity / Q000473:pathology*; D004801:Eosine Yellowish-(YS); D004867:Equipment Design; D005456:Fluorescent Dyes; D006416:Hematoxylin; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008963:Molar / Q000473:pathology; D009532:Nickel / Q000737:chemistry; D010784:Photomicrography / Q000379:methods; D018915:Root Canal Preparation / Q000295:instrumentation*; D014025:Titanium / Q000737:chemistry; D019227:Tooth Apex / Q000473:pathology
chemical_list: D004396:Coloring Agents; D003722:Dental Alloys; D005456:Fluorescent Dyes; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium; D004801:Eosine Yellowish-(YS); D006416:Hematoxylin