Assessment of linear and angular measurements on three-dimensional cone-beam computed tomographic images

Moreira, Carla Ruffeil; Sales, Marcelo Augusto Oliveira de; Lopes, Patricia M.L.; Cavalcanti, Marcelo Gusmão Paraíso

doi:10.1016/j.tripleo.2009.01.032

Cited by 124 publications

(116 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…® , São Caetano do Sul, São Paulo, Brazil) inside a container filled with water to simulate the attenuation of radiation through the soft tissue. [15][16][17] The scans were performed using the The interpretation of the images was carried out by three specialist examiners (two oral radiologists and an endodontist) with at least 3 years' experience in their specialties. All the examiners were trained in the use of OnDemand3D Dental (OrthopantomographOP300 ® ) ( Fig.…”

Section: Tomographic Analysismentioning

confidence: 99%

Evaluation of Root Fracture in endodontically treated Teeth using Cone Beam Computed Tomography

Tiepo

Magrin

Kovalik

et al. 2017

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

Aim: Our objective was to perform an in vitro evaluation of root fracture in endodontically treated teeth using two cone beam computed tomography (CBCT) machines. Materials and methods:The sample comprised 86 singlerooted human premolars that had been fractured by a universal testing machine. The tomographic images were acquired using an Orthopantomograph OP300 ® and an Orthophos XG 3D ® and evaluated by three examiners, by means of specific software. The teeth were classified into presence or absence of root fracture, then the root third where the fracture occurred, was determined. With regard to the detection of the fracture, the Kappa statistic was used for intra and interexaminer reproducibility at two distinct points in time. Chi-squared test was employed to analyze the sensitivity and specificity of the two tomographs (p < 0.05). Results:The results showed a good or excellent Kappa index between examiners. As for the absolute frequency, the sensitivity (0.6) of the Orthophos XG 3D ® equipment was superior, while specificity (0.91) was higher with the Orthopantomograph OP300 ® . On the receiver operating characteristics curve, moderate performance was found with an accuracy of 0.73 (OrthopantomographOP300 ® ) and 0.74 (Orthophos XG 3D ® ) respectively. As far as the location of the root fracture is concerned, moderate agreement was verified using the Kappa statistic (k = 0.56). Evaluation of Root Fracture in endodontically treated Clinical significance:An early and precise detection of root fractures is of the utmost clinical importance, but the radiopaque and/or metallic filling materials in the CBCT viewing field may generate artifacts, known as the beam-hardening effect, which could compromise root fracture detection.

show abstract

Section: Tomographic Analysismentioning

confidence: 99%

Evaluation of Root Fracture in endodontically treated Teeth using Cone Beam Computed Tomography

Tiepo

Magrin

Kovalik

et al. 2017

The Journal of Contemporary Dental Practice

View full text Add to dashboard Cite

show abstract

“…Precise linear and angular measures can be obtained without influence of magnification and positioning errors, which are critical characteristics of regular radiology (BERCO et al, 2009;HASSAN et al, 2009;MOREIRA et al, 2009;FOURIE et al, 2010;EL-BEIALY et al, 2011;KAPILA et al, 2011;GAIA et al, 2013). Nevertheless, there are limited descriptions of tridimensional (3D) methods for facial pattern diagnosis on CBCT.…”

Section: Introductionmentioning

confidence: 99%

Facial pattern analysis: critic review and collection of facial proportions in a brazilian sample using cone-beam computed tomography

Beaini¹,

Cappellette²,

Melani³

2017

Biosci. J.

View full text Add to dashboard Cite

ABSTRACT:The classification of facial vertical patterns is a common practice among dentists of different specialties. It influences treatment planning and expected outcomes, but is usually carried out qualitatively. The aim of this study is to better understand vertical facial proportions, combining a critic review of the literature with the collection of data from 100 Brazilian adult sample in search of 3D quantitative parameters with the use of Cone-Beam Computed Tomography (CBCT) measurements. In Pubmed database, the following quoted phrases were used: "Facial pattern" AND "Facial Index" AND "Facial height Index" AND "Facial height" AND "Dolichofacial" AND "Brachyfacial" AND "Longface syndrome" AND "Short-face syndrome" in a 25 years interval . Study selection was performed searching for crucial facial features, commonly used to determine the facial pattern of a patient. In CBCT exams, 100 patients had facial features measured and classified by the three most reliable methods. The literature on the field can be very confusing, as the methods, landmarks and averages differed considerably. Most of the facial features researched had different values when the literature was analyzed and compared to our data. This indicates that ethnic, age and gender variations play an important whole in facial pattern diagnostic and should be taken in account when using general cephalometric approaches on diagnosis. With a group sorting method, combining the ratios between the anterior Facial height and the width, the anterior vertical proportion and the gonial angle divergence, and with anatomical landmarks we successfully correlated the sample to the qualitative description, as shorter faced patients to larger bi-zygomatic distances and less divergent gonial angles and longer faced patients with narrower and more divergent faces.

show abstract

“…With regard to the method employed, the applicability of CBCT in Dentistry appears to be questionable because some studies 19,[22][23][24][25][26] claimed that the CBCT was a reliable and accurate method for verification of changes and carry out measures in TMJ as a whole and specifically in the mandibular condyles. This is especially true when the sagittal and coronal views are considered, being efficient in the determination of changes related to the positioning and shape of the condyle and joint surfaces 27,28 .…”

mentioning

confidence: 99%

Comparative dimensional tomographic study of the mandibular condyle of individuals with transverse maxillary deficiency

et al. 2017

View full text Add to dashboard Cite

Transverse maxillary deficiency is characterized by posterior uni or bilateral crossbite, crowded and rotated teeth, as well as high palate. Its treatment in adult individuals is surgically assisted rapid palatal expansion. The aim of this study was to verify the occurrence of dimensional alterations in the mandibular condyles of patients with TMD submitted to surgically assisted maxillary expansion. Measurements of the mandibular condyles using the DISTANCE tool in cone beam computed tomography iCat software were performed. The values obtained were submitted to statistical analysis by the paired t-test and the results showed statistically significant dimensional reduction in the axial posterior-anterior lateral (-0.74mm), axial posterior-anterior lateral left (-0.90mm) and coronal medium right (-1.24mm) dimensions. The coronal inferior (1.13mm), coronal inferior left (1.78mm) and coronal superior-inferior right (0.76mm) measurements showed statistically significant dimensional increase. The results allowed us to conclude that dimensional alterations occurred in the mandibular condyles in individuals with maxillary transversal deficiency that underwent surgically assisted rapid palatal expansion (SAPE), which can be understood by remodeling, since they are characterized by dimensional increase or reduction, depending on the location where the measurement was performed.

show abstract

Assessment of linear and angular measurements on three-dimensional cone-beam computed tomographic images

Cited by 124 publications

References 20 publications

Evaluation of Root Fracture in endodontically treated Teeth using Cone Beam Computed Tomography

Evaluation of Root Fracture in endodontically treated Teeth using Cone Beam Computed Tomography

Facial pattern analysis: critic review and collection of facial proportions in a brazilian sample using cone-beam computed tomography

Comparative dimensional tomographic study of the mandibular condyle of individuals with transverse maxillary deficiency

Contact Info

Product

Resources

About