Evaluation of simulated bone lesion in the head of the mandible by using multislice computed tomography

Abstract

Conventional radiography has shown limitation in acquiring image of the ATM region, thus, computed tomography (CT) scanning has been the best option to the present date for diagnosis, surgical planning and treatment of bone lesions, owing to its specific properties. Objective: The aim of the study was to evaluate images of simulated bone lesions at the head of the mandible by multislice CT. Material and methods: Spherical lesions were made with dental spherical drills (sizes 1, 3, and 6) and were evaluated by using multislice CT (64 rows), by two observers in two different occasions, deploying two protocols: axial, coronal, and sagittal images, and parasagittal images for pole visualization (anterior, lateral, posterior, medial and superior). Acquired images were then compared with those lesions in the dry mandible (gold standard) to evaluate the specificity and sensibility of both protocols. Statistical methods included: Kappa statistics, validity test and chi-square test. Results demonstrated the advantage of associating axial, coronal, and sagittal slices with parasagittal slices for lesion detection at the head of the mandible. Results: There was no statistically significant difference between the types of protocols regarding a particular localization of lesions at the poles. Conclusions: Protocols for the assessment of the head of the mandible were established to improve the visualization of alterations of each of the poles of the mandible's head. The anterior and posterior poles were better visualized in lateral-medial planes while lateral, medial and superior poles were better visualized in the anterior-posterior plane.

Assessment of simulated mandibular condyle bone lesions by cone beam computed tomography

“…Utumi et al 20 also found a high level of sensitivity and specificity using multislice CT with parasagittal reconstruction. The same was found, with sagittal and coronal slices along the axis of the mandibular condyle, in the present work.…”

“…Similarly to the studies of Utumi et al 20 and Cara et al, 14 the statistical methodology used in this study considered just one intra-observer analysis in order to avoid increasing costs and time, without losing the accuracy of the results, compared to the use of two intra-observer analyses. Additionally, a second observer was not considered because it would not increase sufficiently the number of observers to characterize a statistically representative sample.…”

“…This is the same methodology used in the work of Utumi et al 20 This methodology was chosen in order to obtain a Gold Standard, which would permit an easy comparison of the results obtained by the observers, allowing for statistical treatment.…”

Comparison between cone-beam and multislice computed tomography for identification of simulated bone lesions

“…Furthermore, multiplanar reconstruction (MPR) and cross sectional images provide improvements in the diagnosis, rehabilitation and evaluation of bone pathological processes in the maxillofacial complex. [12][13][14] The purpose of this research was to compare the accuracy of MSCT and CBCT in the diagnosis of simulated mandibular bone lesions by means of cross sectional images and axial/MPR slices.…”

A local reference value for the mental foramen in adult Sudanese: A 3D computerized tomography based study

“…CT has been the first option for diagnosis, surgical planning, and treatment of osseous trauma injuries due to its high specificity and sensitivity. [23] As a result of recent advances in computer hardware and software; 3D imaging by CT scans of craniofacial anomalies is routinely used by most medical centers to define the unique individual aspects of complex anatomy, plan interventions and follow results [24] Therefore, we utilized CT images because they have certain advantages in diagnostic medicine. In our series of 160 CT images, the width of the MF has been measured; it was found that there is a significant difference between the males and females for both right and left MF width at p≤0.035 and 0.010 respectively (Table3)Studies have mentioned that the MF morphology, varies not only according to age [25] gender [26,27]and ethnicity; [28,29] but even within the same race; in different geographic regions [30,31,32]and within the inhabitants of the same geographic area [33].…”