A Cone-beam Computed Tomography Evaluation of Mandibular Anterior Alveolar Bone Dimensions in Class I and Class II Skeletal Patterns

(1) Background—The aim of the present study was to evaluate the correlation between the temporomandibular joint (TMJ) osseous morphology of normal skeletal pattern individuals with different dental malocclusions by using cone-beam computed tomography (CBCT). (2) Methods—The CBCT images of bilateral TMJs in 67 subjects with skeletal class I and average mandibular angle (26 males and 41 females, age range 20–49 years) were evaluated in this study. The subjects were divided into class I, class II division 1, and class II division 2 according to the molar relationship and retroclination of the maxillary incisors. Angular and linear measurements of TMJ were evaluated and the differences between the groups were statistically analyzed. (3) Results—Intragroup comparisons showed statistical differences for articular eminence inclination, the width of the glenoid fossa, the ratio of the width of the glenoid fossa to the depth of the glenoid fossa, the condylar angle, and the intercondylar angle between the malocclusion groups. The measurements of the glenoid fossa shape showed no significant difference between the left and right sides. Females showed more differences in the morphological parameters of TMJ between the three malocclusion groups than the males. (4) Conclusion—The present study revealed differences in the TMJ osseous morphology between dental class I and class II malocclusions in the normal skeletal pattern.

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Anatomical characteristics of mandibular bone in skeletal Class I, II and III patients by using cone beam computed tomography images in an iranian population

Brazilian Dental Science ◽

10.14295/bds.2021.v24i2.2475 ◽

2021 ◽

Vol 24 (2) ◽

Author(s):

Mohammad Zandi ◽

Abbas Shokri ◽

Vahid Mollabashi ◽

Zahed Eghdami ◽

Payam Amini

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Class Ii ◽

Class I ◽

Cone Beam ◽

Class Iii ◽

Anatomical Characteristics ◽

Skeletal Class ◽

Skeletal Class Ii ◽

Ramus Height

Objetive: This study aimed to compare the anatomical characteristics of the mandible in patients with skeletal class I, II and class III disorders using cone beam computed tomography (CBCT). Material and Methods: CBCT scans of patients between 17 to 40 years taken with NewTom 3G CBCT system with 12-inch field of view (FOV) were selected from the archive. Lateral cephalograms were obtained from CBCT scans of patients, and type of skeletal malocclusion was determined (Class I, II or III). All CBCT scans were evaluated in the sagittal, coronal and axial planes using the N.N.T viewer software. Results: The ramus height and distance from the mandibular foramen to the sigmoid notch in class II patients were significantly different from those in skeletal class I (P < 0.005). Distance from the mandibular canal to the anterior border of ramus in class III individuals was significantly different from that in skeletal class I individuals (P < .005). Conclusion: Length of the body of mandible in skeletal class I was significantly different from that in skeletal class II and III patients. Also, ramus height in skeletal class I was significantly different from that in skeletal class II patients. CBCT had high efficacy for accurate identification of anatomical landmarks. Keywords Prognathism; Retrognathism; Mandible; Anatomy; Cone beam computed tomography.

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Analysis of the Buccal Bone Plate, Root Inclination and Alveolar Bone Dimensions in the Jawbone. A Descriptive Study Using Cone-Beam Computed Tomography

Journal of Oral and Maxillofacial Research ◽

10.5037/jomr.2019.10204 ◽

2019 ◽

Vol 10 (2) ◽

Cited By ~ 3

Author(s):

Joana Gomes dos Santos ◽

Ana Paula Oliveira Reis Durão ◽

António Cabral de Campos Felino ◽

Ricardo Manuel Casaleiro Lobo de Faria de Almeida

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Descriptive Study ◽

Bone Plate ◽

Cone Beam ◽

Bone Dimensions

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Comparison of interradicular distances and cortical bone thickness in Thai patients with Class I and Class II skeletal patterns using cone-beam computed tomography

Imaging Science in Dentistry ◽

10.5624/isd.2016.46.2.117 ◽

2016 ◽

Vol 46 (2) ◽

pp. 117 ◽

Cited By ~ 3

Author(s):

Nattida Khumsarn ◽

Virush Patanaporn ◽

Apirum Janhom ◽

Dhirawat Jotikasthira

Keyword(s):

Computed Tomography ◽

Cortical Bone ◽

Cone Beam Computed Tomography ◽

Class Ii ◽

Class I ◽

Cone Beam ◽

Bone Thickness ◽

Cortical Bone Thickness

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Evaluation of the position and morphology of tongue and hyoid bone in skeletal Class II malocclusion based on cone beam computed tomography

BMC Oral Health ◽

10.1186/s12903-021-01839-y ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Wener Chen ◽

HungEn Mou ◽

Yufen Qian ◽

Liwen Qian

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Hyoid Bone ◽

Class Ii ◽

Growth Patterns ◽

Class I ◽

Cone Beam ◽

Skeletal Class ◽

Skeletal Class Ii ◽

Average Angle

Abstract Background The aim of the study was to analyze the morphology and position of the tongue and hyoid bone in skeletal Class II patients with different vertical growth patterns by cone beam computed tomography in comparison to skeletal Class I patients. Methods Ninety subjects with malocclusion were divided into skeletal Class II and Class I groups by ANB angles. Based on different vertical growth patterns, subjects in each group were divided into 3 subgroups: high-angle group (MP-FH ≥ 32.0°), average-angle group (22.0° ≤ MP-FH < 32°) and low-angle group (MP-FH < 22°). The position and morphology of the tongue and hyoid bone were evaluated in the cone beam computed tomography images. The independent Student’s t‐test was used to compare the position and morphology of the tongue and hyoid bone between skeletal Class I and Class II groups. One-way analysis of variance (ANOVA) was used to compare the measurement indexes of different vertical facial patterns in each group. Results Patients in skeletal Class II group had lower tongue posture, and the tongue body was smaller than that of those in the Class I group (P < 0.05). The position of the hyoid bone was lower in the skeletal Class II group than in Class I group (P < 0.05). The tongue length and H-Me in the skeletal Class I group with a low angle were significantly larger than those with an average angle and high angle (P < 0.05). There was no significant difference in the position or morphology of the tongue and hyoid bone in the skeletal Class II group with different vertical facial patterns (P > 0.05). Conclusion Patients with skeletal Class II malocclusion have lower tongue posture, a smaller tongue body, and greater occurrence of posterior inferior hyoid bone position than skeletal Class I patients. The length of the mandibular body in skeletal Class I patients with a horizontal growth type is longer. The position and morphology of the tongue and hyoid bone were not greatly affected by vertical facial development in skeletal Class II patients.

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Assessment of Facial Soft Tissue Dimensions in Adult Patients with Different Sagittal Skeletal Classes using Cone beam Computed Tomography

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1886 ◽

2016 ◽

Vol 17 (7) ◽

pp. 542-548 ◽

Cited By ~ 3

Author(s):

Mohammad Y Hajeer ◽

Mowaffak A Ajaj ◽

Heba M Jazmati

Keyword(s):

Computed Tomography ◽

Soft Tissue ◽

Cone Beam Computed Tomography ◽

Class Ii ◽

Adult Patients ◽

Class I ◽

Cone Beam ◽

Class Iii ◽

Facial Soft Tissue ◽

Lower Lip

ABSTRACT Introduction Few studies utilized cone beam computed tomography (CBCT) to evaluate soft tissue dimensions in malocclusion patients. The aim of this study was to analyze the three-dimensional (3D) soft tissue relationships of adult patients according to their gender and skeletal sagittal class using CBCT. Materials and methods The study sample consisted of 96 CBCT images of patients of both genders; aged 18 to 25 years with a normal vertical skeletal pattern. Patients were segregated into three groups according to their skeletal sagittal class: Class I (2 < ANB < 4), class II (ANB > 4), and class III (ANB < 2). The soft tissue measurements were analyzed in both the sagittal views and frontal volumetric rendered views using 3D-OnDemand software. Results In males, the measurements (U1-stom, nasal width, mouth width) were greater in class I than in class II group. Lower lip thickness was greater in class I than in class III group (p < 0.05). In females, both labiomental fold thickness and upper lip height measurements showed greater mean values in class II than in class I group. In contrast, lower lip height was greater in class I than in class III group. Ls-Pr, U1-stom, and face width at Cheilion revealed greater values in class III patients than in class II patients. On the other hand, the lower lip thickness, upper lip height, and lower lip height measurements showed greater values in class II than in class III group (p < 0.05). Soft tissue thicknesses and measurements were greater in males than in females. However, statistically significant differences between the two sexes were not detected for all of the variables measured in each skeletal class. Conclusion The current study indicates the presence of differences in soft tissue thicknesses and facial soft tissue dimensions among skeletal classes and between the two sexes. Clinical significance Cone beam computed tomography imaging is a very valuable tool to analyze 3D soft tissue characteristics of patients with different skeletal patterns of malocclusion. How to cite this article Jazmati HM, Ajaj MA, Hajeer MY. Assessment of Facial Soft Tissue Dimensions in Adult Patients with Different Sagittal Skeletal Classes using Cone beam Computed Tomography. J Contemp Dent Pract 2016;17(7):542-548.

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Evaluation of horizontal condylar angle in malocclusions with mandibular lateral displacement using cone-beam computed tomography

The Angle Orthodontist ◽

10.2319/012621-76.1 ◽

2021 ◽

Author(s):

Roberto L. Velásquez ◽

Jorge C. Coro ◽

José M. Bustillo ◽

Sadao Sato

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Lateral Displacement ◽

Class Ii ◽

Contralateral Side ◽

Class I ◽

Cone Beam ◽

Class Iii ◽

Skeletal Class ◽

Significant Difference

ABSTRACT Objectives To evaluate the horizontal condylar angle (HCA) in mandibular lateral displacement (MLD). Materials and Method s: HCA in MLD malocclusions were examined using cone-beam computed tomography data in subjects with MLD and control subjects. Results HCA in joints of control patients and contralateral side joints of MLD patients were not significantly different. The mean HCA on the shifted side was larger than on the contralateral side (P < .001) in the different HCA groups. HCA was significantly larger on the shifted side than on the contralateral side in skeletal Class I, Class II, and Class III groups (P < .001). Conclusions (1) There was no statistically significant difference between HCA in control patients and on the contralateral side in MLD patients. (2) HCA was significantly larger on the shifted side than on the contralateral side. (3) HCA on the shifted side and the contralateral side in MLD Class I, Class II, and Class III are significantly different.

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Buccolingual Inclination of Canine and First and Second Molar Teeth and The Curve of Wilson in Different Sagittal Skeletal Patterns of Adults Using Cone-Beam Computed Tomography

10.21203/rs.2.22749/v1 ◽

2020 ◽

Author(s):

Amin Golshah ◽

Navid Rezae ◽

Sara Heshmati

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Class Ii ◽

Class I ◽

Cone Beam ◽

Dental Arch ◽

Cross Sectional ◽

Second Molar ◽

Molar Teeth ◽

The Mean

Abstract Background: This study aimed to assess the buccolingual inclination of canine and first and second molar teeth and the curve of Wilson in different sagittal skeletal patterns in untreated adults using cone-beam computed tomography (CBCT). Methods: Sixty-six CBCT scans of adults (mean age: 28.74±5.25 years) were evaluated in this cross-sectional study. The images were standardized using the Frankfurt horizontal plane and the interorbital line. The sagittal skeletal pattern was determined using the ANB angle and Wits appraisal. Inclination angles were measured by NNT Viewer and Mimics software. The curve of Wilson was measured by connecting the tips of mesiobuccal and mesiolingual cusps of maxillary first and second molars along the buccal groove and measuring the formed angle. Data were analyzed using ANOVA. Results: The intraobserver agreement was 0.969. The mean inclination of maxillary first and second molars in class I and III patients was significantly higher than that in class II patients (P<0.05). The mean inclination of mandibular first and second molars in class II patients was significantly higher than that in class I and III patients (P<0.05). The difference in inclination of maxillary and mandibular canine teeth was not significant (P>0.05). The mean curve of Wilson in second molars of class II patients was significantly higher than that in class I patients (P<0.05). Conclusion: In different sagittal skeletal patterns, a compensatory relationship exists between the opposing teeth, which along with the standards of crowns, can be used to determine the appropriate position of teeth in dental arch.

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Alveolar Bone Dimensions of Mandibular Posterior Teeth using Cone Beam Computed Tomography: A Pilot Study

Journal of Contemporary Dentistry ◽

10.5005/jp-journals-10031-1135 ◽

2016 ◽

Vol 6 (1) ◽

pp. 9-14 ◽

Cited By ~ 2

Author(s):

Varun Rajeev Kunte ◽

Ajay Ramesh Bhoosreddy ◽

Seema Ajay Bhoosreddy ◽

Atul Ashok Pandharbale ◽

Manila Rajaram Shinde ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Cone Beam ◽

Bone Augmentation ◽

Posterior Teeth ◽

Bone Width ◽

Mandibular Posterior Teeth ◽

Molar Region ◽

Bone Dimensions

ABSTRACT Aim The aim of this study was to analyze bone dimensions of the dentate posterior mandible using cone beam computed tomography (CBCT). Objectives The objectives of this study were • To measure thickness of buccal and lingual bone walls in mandibular posterior teeth using CBCT. • To measure alveolar bone width in mandibular posterior teeth using CBCT. Materials and Methods Ten CBCT scans were included in the study (n = 65 teeth). Thicknesses of buccal and lingual walls were measured at measurement point 1 (MP1) and measurement point 2 (MP2). Alveolar width was assessed at most coronal detected alveolar bone (BW1) and at superior border of mandibular canal (BW2). Vertical distance between BW1 and BW2 was measured (H). Data were tabulated and results were statistically analyzed using unpaired t test. Results The study showed that there was an increase in bone wall thickness from 1st premolar to 2nd molar for buccal and lingual alveolar plates. Lingual bone walls were thicker than buccal bone walls at MP1 and MP2 for all teeth. Bone width for premolars was considerably less than bone width of molars. Conclusion Careful preoperative analysis using CBCT is important to assess need of bone augmentation procedures. As the bone thickness and width in the molar region is more adequate, prognosis of implants placed in molar region may be better. Clinical significance Analysis of bone dimensions is of utmost importance for successful outcome of bone augmentation procedures in implant treatment. How to cite this article Kunte VR, Bhoosreddy AR, Bhoosreddy SA, Pandharbale AA, Shinde MR, Ahire BS. Alveolar Bone Dimensions of Mandibular Posterior Teeth using Cone Beam Computed Tomography: A Pilot Study. J Contemp Dent 2016;6(1):9-14.

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