Accuracy of Cone Beam CT Measurements for Assessment of Posterior Mandible: A Cadaver Study

Objectives: This study is aimed at analysing the accuracy and reliability of the cone beam CT (CBCT) measurements and direct physical measurements of the posterior mandible. Materials and methods: Eighteen cadaveric hemi-mandibles were dissected from the soft tissues and the CBCT images of the mandibles were taken. Direct physical and cone beam CT measurements of six landmarks which includes height of ramus (R), distance of lingula to sigmoid notch (LS), distance of lingula to inferior border (LI), position of lingula in relation to occlusal plane (L-OP), ramus thickness at crestal level (RT-C), and ramus thickness at midway between sigmoid notch and lingula (RT-M) were determined. Accuracy and reliability of the measurements were tested. Results: Four landmarks showed high accuracy when measuring the posterior mandible, while two landmarks, LI and RT-M, showed statistically significant weaker accuracy (p<0.05). Inter-reliability were good for all landmarks when measured directly physically on mandibles (ICC>0.7 and p>0.05), but were low on two landmarks, LI and RT-C, on CBCT measurement (ICC<0.5 and p<0.05). Conclusion: A generally strong accuracy between direct physical and CBCT measurements for most landmarks on posterior mandible were found. Reliability between two researchers were high on direct physical measurements. Meanwhile, two landmarks on CBCT which include LI and RT-C showed low inter-reliability. Hence, CBCT measurements proved to be a good tool for pre-operative assessment, since high inter-reliability and strong accuracy corresponding to direct physical were recorded.

Download Full-text

Accuracy of Cone Beam Computed Tomography in Determining the Location of the Genial Tubercle

Otolaryngology ◽

10.1016/j.otohns.2007.02.035 ◽

2007 ◽

Vol 137 (1) ◽

pp. 115-118 ◽

Cited By ~ 23

Author(s):

Elizabeth M. Hueman ◽

Marcel E. Noujeim ◽

Robert P. Langlais ◽

Thomas J. Prihoda ◽

Frank R. Miller

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Cone Beam Ct ◽

Cadaver Study ◽

Cone Beam ◽

Radiographic Technique ◽

Significant Difference ◽

Operative Planning ◽

Inferior Border ◽

Genial Tubercle

OBJECTIVE: To determine the accuracy of cone beam computed tomography (CT) to predict the location of the genial tubercle. STUDY DESIGN AND SETTING: Cadaver study for anatomic analysis of 17 adult human cadaver heads. Each skull/cadaver head underwent radiographic imaging with cone beam CT and cadaver dissection. Measurements, including mandibular height (MH), genial tubercle width (GTW), genial tubercle height (GTH), distance from inferior border of mandible to genial tubercle (IBM/GT), and mandibular thickness (MT) were recorded. RESULTS: Statistical analysis with paired t test showed no significant difference between cadaver dissections versus cone beam measurements. Ninety-five percent confidence intervals (CI) were as follows: GTW (−0.2 to 1.0), GTH (−0.1 to 0.9), distance IBM/GT (−0.8 to 5.0), MH (−1.3 to −2.6), and MT (−0.1 to 0.3). CONCLUSION: These results show the accuracy of the 3D cone beam CT in the anatomic location of the genial tubercle. SIGNIFICANCE: This radiographic technique may prove useful in pre-operative planning for the mandibular osteotomy in genioglossus advancement procedures.

Download Full-text

Dental anomalies in children in gulf countries

International Journal of Growth and Development ◽

10.25081/ijgd.2017.v1i1.3 ◽

2017 ◽

Vol 1 (1) ◽

pp. 2

Author(s):

Saud Al- ANezi

Keyword(s):

Primary Teeth ◽

Normal Development ◽

Cone Beam Ct ◽

Treatment Options ◽

Ct Scans ◽

Cone Beam ◽

Occlusal Plane ◽

Dental Anomalies ◽

Gulf Countries ◽

Modern Methods

Canines are important teeth which are positioned at the corner of the mouth. Their development and eruption is a fascinating process because they move a long way towards the occlusal plane. In this presentation, the normal development of canines will be outlined. Furthermore, reasons for canine impaction will be discussed and the different methods of diagnosis using classic and modern methods such as Cone Beam CT Scans. Furthermore, different treatment options e.g. monitoring, interceptive extraction of primary teeth and exposure and orthodontic traction will be thoroughly explained. Moreover, the evidence behind each treatment option will be examined. Several cases treated by the presenter will be shown.

Download Full-text

Validation of Cone-Beam CT Measurements of Tumour Burden Using Three-Dimensional Histopathology: Initial Results For a Lumpectomy

Digital Mammography - Lecture Notes in Computer Science ◽

10.1007/978-3-540-70538-3_61 ◽

2008 ◽

pp. 440-446 ◽

Cited By ~ 2

Author(s):

G. M. Clarke ◽

J. G. Mainprize ◽

C. Peressotti ◽

L. Sun ◽

D. Wang ◽

...

Keyword(s):

Cone Beam Ct ◽

Three Dimensional ◽

Cone Beam ◽

Tumour Burden ◽

Ct Measurements ◽

Initial Results

Download Full-text

Cone-beam CT measurements of distal tibio-fibular syndesmosis in asymptomatic uninjured ankles: does weight-bearing matter?

Skeletal Radiology ◽

10.1007/s00256-018-3074-6 ◽

2018 ◽

Vol 48 (4) ◽

pp. 583-594 ◽

Cited By ~ 18

Author(s):

Delaram Shakoor ◽

Greg M. Osgood ◽

Michael Brehler ◽

Wojciech B. Zbijewski ◽

Cesar de Cesar Netto ◽

...

Keyword(s):

Cone Beam Ct ◽

Weight Bearing ◽

Cone Beam ◽

Ct Measurements

Download Full-text

Influence of cone beam CT volume orientation on alveolar bone measurements in patients with different facial profiles

Dentomaxillofacial Radiology ◽

10.1259/dmfr.20180330 ◽

2019 ◽

Vol 48 (6) ◽

pp. 20180330

Author(s):

Eliana Dantas Costa ◽

Priscila Dias Peyneau ◽

Glaucia Maria Bovi Ambrosano ◽

Matheus Lima Oliveira

Keyword(s):

Repeated Measures ◽

Horizontal Plane ◽

Mixed Model ◽

Alveolar Bone ◽

Cone Beam Ct ◽

Cone Beam ◽

Occlusal Plane ◽

Bone Width ◽

Bone Height ◽

Mandibular Base

Objectives: To evaluate the influence of cone beam CT (CBCT) volume orientation on alveolar bone measurements for dental implant planning using CBCT in patients with different facial profiles. Methods: 74 CBCT volumes were selected from a database and classified according to the facial profile of the patient. Height and width measurements of the alveolar bone were carried out with the volume of the mandible in two different orientations: occlusal plane and mandibular base parallel to the horizontal plane. The data were subjected to the mixed model methodology for repeated measures, through the PROC MIXED procedure. Multiple comparisons were performed by Tukey Kramer test (α = 0.05). Results: Alveolar bone width was significantly greater when the CBCT volume was oriented with the mandibular base parallel to the horizontal plane, for all facial profiles (p ≤ 0.05). Alveolar bone height was significantly higher (p ≤ 0.05) for dolichofacial individuals when compared to that of mesofacial and brachyfacial individuals, who did not differ significantly between each other (p > 0.05), regardless of the CBCT volume orientations used in this study. Conclusions: CBCT-based alveolar bone width is increased when the image volume is oriented with the mandibular base parallel to the horizontal plane and dolichofacial individuals present greater alveolar bone height.

Download Full-text

CBCT in Orthodontics: The Wave of Future

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1291 ◽

2013 ◽

Vol 14 (1) ◽

pp. 153-157 ◽

Cited By ~ 13

Author(s):

Lalita G Nanjannawar ◽

Jiwanasha Manish Agrawal ◽

Manish Suresh Agrawal ◽

Anita D Parushetti

Keyword(s):

Treatment Planning ◽

Soft Tissues ◽

Imaging Techniques ◽

Cone Beam Ct ◽

Cone Beam ◽

3D Objects ◽

The Past ◽

Ct Technology ◽

User Friendly ◽

Excellent Tool

ABSTRACT Cone beam computed tomography (CBCT) has probably been one of the most revolutionary innovations in the field of dentistry in the past decade and it provides a novel platform for orthodontic diagnosis and treatment planning. Current imaging techniques are essentially two-dimensional (2D) representations of threedimensional (3D) objects and suffer from several limitations. Hence, fulfillment of ideal imaging goals has been limited. Twodimensional radiographs are insufficient, especially in complex cases like impacted teeth, supernumerary teeth and orthognathic surgeries. CBCT images provide far more detailed information than conventional 2D radiographs and are user friendly. Soft tissues, skull, airway and the dentition can be observed and measured on CBCT images in a 1:1 ratio. Clinical significance CBCT provides an excellent tool for accurate diagnosis, more predictable treatment planning, more efficient patient management and education, improved treatment outcome and patient satisfaction. This article focuses on various applications of cone beam CT technology in orthodontics. How to cite this article Agrawal JM, Agrawal MS, Nanjannawar LG, Parushetti AD. CBCT in Orthodontics: The Wave of Future. J Contemp Dent Pract 2013;14(1):153-157.

Download Full-text

Correlation between the Mandibular Lingula Position and Some Anatomical Landmarks in Cone Beam CT

Healthcare ◽

10.3390/healthcare9121747 ◽

2021 ◽

Vol 9 (12) ◽

pp. 1747

Author(s):

Saturnino Marco Lupi ◽

Jessica Landini ◽

Giorgia Olivieri ◽

Claudia Todaro ◽

Andrea Scribante ◽

...

Keyword(s):

Cone Beam Ct ◽

Inferior Alveolar Nerve ◽

Cone Beam ◽

Occlusal Plane ◽

Italian Population ◽

Anatomical Landmarks ◽

Mandibular Ramus ◽

Second Molar ◽

Vertical Distance ◽

Mandibular Molar

Background: the position of the mandibular lingula (Li) affects the success rate of the inferior alveolar nerve block (IANB) and ramus osteotomies. This study evaluated the position of the Li, to investigate the anatomical relationship between the Li and some anatomical measurements using cone beam computed tomography (CBCT). Methods: 201 hemimandibular CBCTs of 111 patients (43 males and 68 females; 18 to 88 years old) were retrospectively evaluated. The Li location was determined from the lingula tip to: the occlusal plane, the anterior and posterior borders of the mandibular ramus, the lower border of the mandible, the distal surface of the mandibular second molar, and the mandibular notch. We evaluated the correlations between the Li and the anteroposterior diameter of the mandibular ramus; the vertical distance between condyle and mandibular angle; the mesial–distal diameter of the first, second, and third mandibular molar, the intercanine distance, the intermolar distances among the first, second, and third mandibular molars; the distance between the intermolar line of the first molar and midline, and the length of the mandibular body. Results: the vertical distance of the Li from the occlusal plane was 11.22 ± 4.27 mm. Some parameters significantly correlated with the anatomical measurements taken into consideration. Conclusions: the present study provides new information concerning the Li and mandibular anatomy in the Italian population. Moreover, by correlating some anatomic measurements to the Li position, the localization of the Li is made possible, indirectly through the measurement of some distances between anatomical landmarks.

Download Full-text

Comparison of the Hounsfield Unit in CT scan with the Gray Level in cone-beam CT

Journal of Dental Research Dental Clinics Dental Prospects ◽

10.15171/joddd.2019.028 ◽

2019 ◽

Vol 13 (3) ◽

pp. 177-182 ◽

Cited By ~ 2

Author(s):

Tahmineh Razi ◽

Parya Emamverdizadeh ◽

Nadia Nilavar ◽

Sedigheh Razi

Keyword(s):

Soft Tissues ◽

Low Cost ◽

Cone Beam Ct ◽

Hounsfield Unit ◽

Cone Beam ◽

Gray Level ◽

Hard Tissues ◽

Short Time ◽

High Degree ◽

Implant Treatment

Background. The present study was undertaken to compare the Hounsfield Unit (HU) in computed tomography (CT) with the gray level in CBCT in human tissues. Methods. In this study, 25 different soft and hard tissues were evaluated in 21 patients. CBCT images were taken with Newtom VGi machine (Verona, Italy) and CT images were prepared with Somatom Sensation unit (Siemens, Germany). The HU values of soft and hard tissues were compared with the gray level values of CBCT images. Results. There was a strong correlation between the HU in CT and the gray level in CBCT in soft tissues (P<0.001, R2=0.85) and hard tissues (P<0.001, R2=0.74) and in general (P<0.001, R2=0.91). Conclusion. A high degree of agreement was seen between HU in CT and gray level in CBCT in both hard and soft tissues. Since the gray level in CBCT was similar to HU in CT and can be used as a parameter determine bone density in implant treatment and also to determine the bone type, the CBCT technique is recommended in such cases due to its low radiation dose, short time and low cost compared to CT.

Download Full-text