IADR 95th

74/75

-74-Planmeca Pro Max 3D CBCT, Planmeca Romexis Viewer 3.0.1.R2874 Root Canal Morphology of MandibularFirst Molar: A CBCT StudyPoster Presentation3:45 PM–5:00 PM Mar 24, 2017CC, First Floor Authors:NavinAgrawal(Presenter)B P KoiralaInstitute of Health Sciences (BPKIHS)NavinAgrawal(Presenter)B P KoiralaInstitute of Health Sciences (BPKIHS)VarunSingh, JJTUAbstract: Objectives: To study the1. External morphology and number of root/roots,2. Apical anatomy of root canals,3. Type of canals present according to Vertucci’sand contemporary de Pablo's classification in human permanent mandibularfirst molars.Methods: The 90 teeth meeting the inclusion criteria was washed, stored in distilled water with Methods: The 90 teeth meeting the inclusion criteria was washed, stored in distilled water with thymoliodide crystals until further use. The prepared sample were mounted on modellingwax and scanned by PlanmecaPro Max 3D CBCT at constant thicknesses of 150 um/slice. The teeth were viewed and analyzed with PlanmecaRomexisViewer 3.0.1.R against set criteria by 2 evaluators.Results: The most common external morphology observed was 2 separate roots (87%). Of these, 63% had flat roots in both the roots and 24% had conical roots in distal root. 1.1% had 3 separate roots.The canal shape at apical 1mm for MesialApical Section: 1MAS1 (Canal1), 1MAS2 (Canal 2) and Distal Apical Section: 1DAS1 (Canal1), 1DAS2 (Canal2) along with shape at 2 and 3mm is Distal Apical Section: 1DAS1 (Canal1), 1DAS2 (Canal2) along with shape at 2 and 3mm is explained in the table. The canal shape were classified as round (Group 1), oval (Group 2), long oval (Group 3) and ribbon shaped (Group 4).The most common canal configuration in mesialcanal were type IV (46.7%), followed by type II (30%). In the distal (D) roots, the incidence of Type I (60%) was highest followed by type II (24.4%) configuration.Conclusions: The root number, external morphology, canal morphology and apical anatomy of Nepalese mandibularmolars showed variable features. The prevalence of 2 roots was higher, in contrast to Mongoloid populations. Type IV canal configuration was commonly observed in mesialcontrast to Mongoloid populations. Type IV canal configuration was commonly observed in mesialand Type I in distal roots, with round and oval shape anatomy at apical 1mm. CBCT is a potential tool and efficient method of studying root canal systems.Table(s):3DAS22MAS12MAS22DAS12DAS21MAS11MAS21DAS11DAS2(2nd DistalCanal at3mm) :(freq/ %)(1st MesialCanal at2mm) :(freq/ %)(2nd MesialCanal at2mm) :(freq/ %)(1st DistalCanal at2mm) :(freq/ %)(2nd DistalCanal at2mm):(freq / %)(1st MesialCanal at1mm) :(freq/ %)(2nd MesialCanal at1mm) :(freq/ %)(1st DistalCanal at1mm) :(freq/ %)(2nd DistalCanal at1mm):(freq / %)Round : 147 / 52.2%48 / 76.2%25 / 27.8%11 / 91.7%52 / 57.8%51 / 82.3%24 / 26.7%9 / 75%50 / 55.6%45 / 77.6%31 / 34.4%7 / 77.8%Oval : 215 / 16.7%14 / 22.2%30 / 33.3%1 / 8.3%10 / 11.1%10 / 16.1%36 / 40%2 / 16.7%17 / 18.9%12 / 20.7%30 / 33.3%2 / 22.2%Long Oval : 38 / 8.9%014 / 15.6%09 / 10%1 / 1.6%15 / 16.7%07 / 7.8%1 / 1.7%18 / 20%0Flat/Ribbon : 419 / 21.1%020 / 22.2%018 / 20%014 / 15.6%015 / 16.7%010 / 11.1%0Axial SectionMorphology3MAS1 (1stMesialCanal at3mm) :(freq / %)3MAS2(2nd MesialCanal at3mm) :(freq / %)3DAS1 (1stDistalCanal at3mm) :(freq / %)Flat/Ribbon : 419 / 21.1%020 / 22.2%018 / 20%014 / 15.6%015 / 16.7%010 / 11.1%0Extra Root1 / 1.1%1 / 1.6%1 / 1.1%01 / 1.1%01 / 1.1%1 / 8.3%1 / 1.1%01 / 1.1%0Single Canal027 / -078 / -028 / -078 / -032 / -081 / -Total90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%90 / 100%Canal Notation (Vertucci’s & Additional Classification)Frequency Mesial RootValid Percent for Mesial RootFrequency Distal RootAdditional root (Type I)11.10%11.10%11: Type I44.40%5460%21: Type II2730.00%2224.40%121: Type III66.70%22.20%22: Type IV4246.70%66.70%12: Type V44.40%22.20%212: Type VI22.20%11.10%1212: Type VII00%11.10%Student PresenterDisclosure Statement:The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONEI have read the IADR policy on licensing.1212: Type VII00%11.10%2121: Type X33.30%11.10%42: Type XI11.10%00%Total 90100%90100%Reprinted with permission from the Journal of Dental Research, J Dent Res 96 (Spec Iss A):-74-I have read the IADR policy on licensing.Signed by NavinAgrawalabstract number 2874, https://iadr2017.zerista.com/event/member/332665, 2017