Objectives: To test the hypothesis that there is no difference between the actual mesiodistal root angulation and the mesiodistal root angulation as measured on the panoramic radiograph.
Materials And Methods: A typodont dentition was set up into a Class I occlusion. Wire struts were placed on the buccal surface of each tooth to represent their long axes. The dentition was fixed into a natural skull for imaging. The radiographic and true mesiodistal angulation of each tooth to a horizontal reference plane (the arch wire) was measured using a coordinate measuring machine (CMM). The mesiodistal root positions were then altered to a more mesial and then more distal position and the measurements were repeated.
Results: Only 26.7% of the radiographic root angulations were within the clinically acceptable angular variation range of +/-2.5 degrees . The greatest variation in the upper arch occurred in the canine-premolar area where the roots were projected as being more divergent. The greatest variation in the lower arch occurred in the lateral incisor-canine region where these roots were projected as being more convergent. The extent of radiographic distortion is statistically greater in the lower arch than in the upper arch in the ideal (P < or = .05) and distal (P < or = .01) root positions.
Conclusions: The hypothesis is rejected. There is a clinically significant variation between the radiographic and the true root angulations recorded. Caution is advised when interpreting mesiodistal root angulation using this radiograph.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2319/040107-161.1 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparison of the effect of different irrigation activation systems on the amount of apical extrusion of irrigation solution in teeth with severely curved canals.
Lasers Med Sci
January 2025
Department of Endodontics, Faculty of Dentistry, Gülhane Faculty of Dentistry, University of Health Sciences, Ankara, Turkey.
Objective: This study aims to quantitatively compare the effects of standard needle irrigation (SNI), passive ultrasonic irrigation (PUI), EDDY, photon-initiated photoacoustic streaming (PIPS), and shock wave-enhanced emission photoacoustic streaming (SWEEPS) on the apical extrusion of irrigation solutions in teeth with severe canal curvature.
Materials And Methods: Seventy-five teeth with a single root and canal, and curvature angles ranging from 20° to 40°, were selected for this study. Root canal curvatures were measured from buccolingual and mesiodistal radiographs using ImageJ software (version 1.
Comparison of the mesiodistal angulation of maxillary canines based on their impaction sector in panoramic radiographs: A cross-sectional study.
Int Orthod
January 2025
Division of Orthodontics, School of Dentistry, Universidad Científica del Sur, Lima, Peru. Electronic address:
Introduction: The complexity of treating impacted maxillary canines varies based on their angulation and position within the dental arch. The aim of this research was to compare the mesiodistal angulation of maxillary canines according to their impaction sector.
Methods: This cross-sectional study evaluated 229 impacted maxillary canines in 171 panoramic radiographs from two private radiology centres in Uruguay and Chile of individuals of both sexes aged 11 years and older with impacted maxillary canines.
Comparative Evaluation of Canal Transport and Centralization Between ProTaper Next and XP-endo Shaper Systems Using CBCT Analysis: An In Vitro Study.
Int J Dent
January 2025
Department of Endodontics, School of Dentistry, Lorestan University of Medical Sciences, Khorramabad, Iran.
This study compared the apical transportation and centering ratio of ProTaper Next (PTN) and XP-endo Shaper (XPS) nickel titanium (NiTi) rotary files in curved root canals using cone beam computed tomography (CBCT). The current in vitro study involved the mesiobuccal canals of mesial roots in 44 extracted mandibular first molars that exhibited apical curvature ranging from 10° to 30°. Two experimental groups were randomly formed from the teeth ( = 22) and subjected to instrumentation with PTN and XPS.
View Article and Find Full Text PDFAccuracy of 3D Printer Technologies Using Digital Dental Models.
Turk J Orthod
December 2024
Çanakkale Onsekiz Mart University Faculty of Dentistry, Department of Orthodontics, Çanakkale, Turkey.
Objective: This study aimed to compare the manufacturing accuracy of different printing techniques - Stereolithography (SLA), Digital Light Processing (DLP), and PolyJet-using digital dental models.
Methods: The study included cast models of 30 patients aged between 12 and 20 years. The selected models were scanned using an intraoral scanner, and surface topography format files were obtained.
Dentoalveolar characteristics in subjects with different anteroposterior relationships: a retrospective cross-sectional Cone-Beam Computed Tomography study.
BMC Oral Health
December 2024
College of Dental Medicine, QU Health, Qatar University, P.O. Box: 2713, Doha, Qatar.
Background: The collum angle, tooth dimensions, root length, and alveolar bone thickness have a significant impact on orthodontic diagnosis and treatment planning. The boundaries of orthodontic tooth movement are determined by alveolar bone thickness and dimensions while the collum angle determines the appropriate positioning of the root relative to the cortical plate. This study aimed to compare the collum angle, crown dimensions, root length, and alveolar bone thickness of the upper and lower incisors, canines, and premolars in subjects with varying anteroposterior relationships.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!