title: Morphometric differences of nasopalatine canal based on 3D classifications: descriptive analysis on CBCT.
abstract: OBJECTIVE
  This descriptive retrospective study analyzed differences among sagittal, coronal and axial NC groups based on the dimensions of nasopalatine canal (NC), buccal bone plate (BBP) and palatal bone plate (PBP) to canal.
  
  
  METHODS
  Measurements were made on 224 CBCTs for NC, BBP and PBP on the three anatomic planes at three levels: level 1, when the incisive foramen is completely closed on the axial plane; level 2, at the midpoint of NC length (NCL) on the sagittal plane; and level 3, at the foramina of Stenson on the sagittal plane. ANOVA tests with post hoc tests were used. The intraclass correlation coefficient and Kappa test were used for evaluating the intraobserver agreement.
  
  
  RESULTS
  Regarding coronal classification, these significant differences were found: BBP length (BL)level 1 was lower for the two parallel canals group; PBP length (PL)level 1 was lower for single canal group; and NCL was lower for Y-type canal group. Regarding axial classification, these significant differences were found: LPlevel 1 was lower for 3.1-3 group; PBP width (PW)level 3 was the greatest for 3.1-3; and LPlevel 3 was lower for 1.1.
  
  
  CONCLUSIONS
  Presurgical evaluation with CBCT in premaxillae region should include analysis on coronal and axial planes and not only on sagittal plane seeing as morphometric differences were found on coronal and axial planes. Following the morphological coronal classification, two parallel canals presented a higher NCL, a higher LP and a lower LV at inferior edge of alveolar ridge.
authors.affiliation: Department of Stomatology, Medicine and Dentistry School, University of Santiago de Compostela, C/Entrerrios S/N, 15872, Santiago de Compostela, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Fernández-Alonso
authors.forename: J A
authors.initials: JA
authors.lastname: Suárez-Quintanilla
authors.forename: O
authors.initials: O
authors.lastname: Rapado-González
authors.forename: María Mercedes
authors.initials: MM
authors.lastname: Suárez-Cunqueiro
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D015331:Cohort Studies; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008297:Male; D008437:Maxilla / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D008875:Middle Aged; D009666:Nose / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D015588:Observer Variation; D021362:Palate, Hard / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D011300:Preoperative Care; D012189:Retrospective Studies
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