Volumetric Analysis of the Jaws in Skeletal Class I and Class II Patients using CBCT and Derived Lateral Cephalograms
Journal Title: Journal of Clinical and Diagnostic Research - Year 2017, Vol 11, Issue 12
Abstract
Introduction: Cone Beam Computed Tomography (CBCT) imaging recently has become a very common diagnostic tool in the orthodontic literature. Recent research work has shown that CBCT imaging would give additional information regarding the volumetric assessment of the craniofacial structures. However, the previous published work has not considered the impact of the anterior-posterior skeletal classification and the vertical skeletal pattern on the volumetric assessment of the maxillary and mandibular bones. Aim: To evaluate maxillary and mandibular volumes (MxV and MdV, respectively) in hyper-divergent skeletal Class II (CII) and normo-divergent skeletal Class I (CI) patients and to investigate any possible correlation between CBCT derived lateral cephalometric variables and the calculated volumes. Materials and Methods: CBCT images of 60 patients (30 patients: CI, 30 patients: CII) were obtained and processed with Mimics® 17 software (Materialise, NV, Belgium). The threedimensional models of both jaws were reconstructed and the related volumes were calculated using a novel approach. CBCT based cephalograms were also derived and linear and angular measurements of the craniofacial complex were obtained. Significance tests were based on t-tests (alpha set at 5%) and Pearson’s correlation coefficients were calculated. Results: No significant differences were detected between the two groups in the MxV (p=0.435) and the MdV (p=0.507). In the CI group, no or weak correlations were found between the volumetric measurements and the 2D variables. In the CII group, there was a strong correlation between both MxV and MdV and both the posterior facial height (r=0.60, 0.78 respectively) and the facial height index (r=0.62, 0.72 respectively). A negative moderate correlation was found between both MxV and MdV and the mandibular plane angle (r=-0.48, -0.44 respectively) and Bjork's sum (r=-0.48, -0.44 respectively). Conclusion: There were no significant differences in the MxV and MdV between CI and CII skeletal patterns. Some cephalometric variables had moderate to strong correlation with the MxV and MdV in the CII group.
Authors and Affiliations
Batol Darjazini Nahas, Mohammad Y Hajeer, Mowaffak A Ajaj, Aghiad Yassin Alsabbagh
Keywords
Related Articles
- EP ID EP368128
- DOI 10.7860/JCDR/2017/31120.10959
- Views 76
- Downloads 0
A Review on Detection and Treatment Methods of Sleep Apnea
This paper presents a review on detection and treatment methods of sleep apnea. Sleep apnea is the most common type of breathing-related sleep disorder. It manifests in a variety of behaviours from teeth grinding to nigh...
Comparative Analysis of External Quality Assessment Results from Dimension EXL 200 and VITROS® 4600
ABSTRACT Introduction: In order to maintain a strict control over the results generated in clinical chemistry laboratories, a number of procedures are followed to maintain the quality of results. The procedures followed...
Exudative Pharyngitis by Corynebacterium pseudodiphtheriticum-A Diagnostic Challenge during Diphtheria Epidemic
ABSTRACT Corynebacterium pseudodiphtheriticum is a common commensal of the upper respiratory tract which can mimic mild diphtheria clinically and can be a challenge for treating physicians, especially in the setting of a...
Sonographic Estimation of Umbilical Cord Cross-section Area and its Reference Value in Normal Pregnancy
Introduction: The routine antenatal sonographic investigations of the umbilical cord are limited for assessment of number of umbilical vessels and doppler evaluation of umbilical blood flow. With the advancements of the...
A Study on Relationship between Domestic Violence and Childhood Mortality in India: Using Weibull frailty Modelling Approach
Introduction: Domestic violence is not an untold story in India but it often goes unreported. According to United Nation Population Fund Report, around two-third of married Indian women are victims of some form of domest...