Lateral Cephalometric Radiographs Research Articles

Comparing Distal-Jet with Dental Anchorage to Distal-Jet with Skeletal Anchorage: A Prospective Parallel Cohort Study.

The use of traditional intra-oral devices in maxillary molar distalization is not without undesirable consequences. The aim of the present study was to compare the miniscrew-supported distal-jet appliance to a traditional distal-jet appliance by evaluating the amount of upper first molar distalization and the dentoalveolar side effects. Data of 600 subjects visited at the orthodontic unit of Sapienza University of Rom were analyzed. Only 46 patients met the inclusion criteria and were selected and treated. Subjects were assigned randomly to receive treatment either with miniscrew-supported distal-jet appliance (Group A) or with a traditional distal-jet appliance (Group B). In Group A, miniscrews were inserted using a computer-guided surgical guide. The amount of upper first molar distalization and the dentoalveolar side effects were assessed both on the digital casts and on the lateral cephalometric radiograph at the end of the distalization phase. A descriptive statistical analysis that included the mean values and the standard deviation was conducted to evaluate the molar distalization and the dentoalveolar effects in two groups. Intergroup differences were determined using the Student’s t-test. The significance was set at p ≤ 0.05. In Group A, greater maxillary first molar distalization and a spontaneous distalization of the first premolars and a palatal inclination of central incisors were observed. By contrast, in Group B, the first premolars tipped mesially and a proclination of the maxillary central incisors was observed. In both groups, the transverse widths of the dental arch increased while a greater tendency of first premolar extrusion and of maxillary first molar rotation was observed in Group B. The skeletal anchorage device achieved greater first molar distalization and did not cause dento-alveolar side effects.

Anterior Tooth Size Discrepancy in Class III Surgical Patients.

The purpose of the present study was to specify whether there are mesiodistal tooth size discrepancies in the anterior region in patients with dentoskeletal Class III malocclusion who underwent orthognathic surgery and orthodontic treatment and to assess the relationship between anterior Bolton ratio and dentoskeletal cephalometric measurements. The diagnostic dental casts and lateral cephalometric radiographs of 113 nongrowing patients (54 females and 59 males; mean age: 19.96 ± 4.42 years) with dentoskeletal Class III malocclusion who underwent orthognathic surgery and orthodontic treatment were included in the study. The mesiodistal widths of the 6 anterior teeth were measured from dental casts using a digital caliper accurate to 0.01 mm and anterior Bolton ratios were calculated. Lateral cephalograms were digitalized and used to measure 4 skeletal and 4 dental parameters. The mean anterior ratio of Class III surgical patients was 80.1% with a standard deviation of 2.8%. Clinically significant anterior tooth size discrepancies (greater than ±2 standard deviation) were found in 40.7% of the sample, 97.8% of those patients having anterior mandibular tooth excess. No significant correlation was found between the anterior Bolton ratio and cephalometric measurements. Clinicians should consider the probability of tooth size discrepancy in the diagnosis and treatment planning of Class III surgical patients and should perform interventions to eliminate these discrepancies during presurgical orthodontic treatment.

Cephalometric Mandibular Dimensions in Growing Turkish Children: Trends of Change, Sex-Specific Differences, and Comparisons with Published Norms.

The aims of this study were to investigate cephalometric mandibular dimensions in growing Anatolian Turkish children and to identify the periods of rapid growth for boys and girls. Furthermore, the secondary aim was to compare obtained values with published standards in the literature. A total of 528 pretreatment lateral cephalometric radiographs, grouped according to age and sex, were analyzed. Effective mandibular length, ramus height, and corpus lengths were comparatively evaluated within age groups for boys and girls and between sexes for the same age group. Data acquired from this study were compared with American, Canadian, Chinese, and European norms. Growth curves for mandible were constructed for each sex group. Effective mandibular length was almost always significantly longer in boys, except for 9- and 12-year-age groups. Effective mandibular length in girls increased significantly between ages 8 and 10, 10 and 12, and 11 and 13 years, while in boys between ages 8 and 10, 9 and 11, and 13 and 15 years. Turkish girls had significantly shorter effective mandibular lengths than American girls at age 14. No significant difference was found between Turkish and Chinese girls and boys. Turkish girls and boys had significantly shorter corpus lengths from their Norwegian counterparts at age 12. Except for 9- and 12-year-age groups, effective mandibular length was almost always significantly longer in boys compared to the girls. It is suggested to use norm values from more recently conducted studies and which are representative of the studied population. Growth curves can be used to predict the approximate mandibular dimensions at a particular age.

Validation of a Finite Element Model for Clinical and Virtual Evaluation of the Changes in Airway Dimensions Following Class III Bimaxillary Orthognathic Surgery.

The aim of this study was to evaluate pharyngeal airway changes in adult skeletal Class III cases whose bimaxillary surgical treatments were planned with different amounts of maxillary and mandibular movement using lateral cephalometric radiographs and finite element analysis (FEA). Our null hypothesis was that bimaxillary orthognathic surgery in which maxillary forward movement (MF) is greater than mandibular backward movement (MB) will result in more expansion of the pharyngeal airway. A total of 31 individuals (11 females, 20 males) with class III skeletal deformity were included in the study. Patients who underwent bimaxillary orthognathic surgery with greater maxillary advancement (MF > MB) were categorized in Group 1 (n = 15), and those with greater mandibular set-back (MB > MF) as Group 2 (n = 16). Changes in airway dimensions were evaluated from lateral cephalometric radiographs. In addition, FEA modeling was used to determine pharyngeal airway changes with 5 different MF/MB combinations performed in skeletal class III bimaxillary surgeries. Nasopharyngeal and oropharyngeal airway dimensions increased in direct proportion to the amount of MF. Hypopharyngeal volume decreased compared to preoperative value in direct proportion to the decrease in MB. According to the FEA models, total pharyngeal airway volume decreased when MF was less than or equal to MB, was nearly unchanged when MF was 2mm greater than MB, and increased when MF was 4mm greater than MB. The results of FEA and lateral cephalometric analysis were compatible. Our results supported the null hypothesis. We concluded that when possible, planning slightly more maxillary advancement than mandibular set-back will not have an adverse impact on the airway. Although the skeletal deformity only causes forward displacement of the mandible, dividing the skeletal correction between the maxilla and mandible may be considered to avoid the risk to patients' quality of life in terms of respiratory function.

The Use of Selective Laser Melting in Mandibular Retrognathia Correction

Digitalization and additive manufacturing offer new possibilities in the manufacturing of individualized medical and dental products. In the paper we present the results of the first 30 consecutive growing patients (15 males and 15 females), with a mean age of 13.69 years (SD = 1.26), who were treated for mandibular retrognathia (skeletal Class II malocclusion), using fixed sagittal guidance (FSG) appliance, individually manufactured by selective laser melting (SLM). Lateral cephalometric radiographs were taken before (T0) and after (T1) treatment and a detailed cephalometric analysis was performed. with a special focus on a time period for malocclusion correction. The analyzed data were compared with the control group (CG; treated with intermaxillary Class II elastics) that was matched for pretreatment age and pretreatment cephalometric measurements. Both methods were effective in the correction of Class II malocclusion, but the time period of correction was significantly shorter (16.03 ± 1.09 months vs. 20.65 ± 4.12 months) with the FSG appliance. After treatment visual skeletal and dentoalveolar effects were achieved, with statistically significant differences measured in mandibular incisors inclination (0.45° in FSG and 2.84° in CG) and distance (−0.61 mm in FSG and 0.13 mm in CG), in mandibular first molar inclination (−1.07° in FSG and 1.18° in CG) and overbite (−3.82 mm in FSG and −2.46 mm in CG), all in favor of FSG appliance. After the final mean treatment time of 16.03 ± 1.09 months, visual skeletal and dentoalveolar effects were achieved, with significant differences in sagittal (SNB angle, SNPg angle, mandibular length (CoGn) and consequently decrease in ANB angle) as well as in vertical (lower anterior facial height (LAFH) and gonial angle) measurements noted, with no reported complications. As the time needed for malocclusion correction was comparable with the reports in the traditional use of the functional appliance and as all the cosmetical and functional changes in all the treated patients remained stable after a 2-year observational period, growing patients with Class II malocclusion could benefit with this type of treatment. As all the cosmetical and functional changes in all the treated patients remained stable after a 2-year observational period, growing patients with Class II malocclusion could benefit from the treatment with FSG appliance.

Is it essential to recognize the gonial angle in orthodontics using panoramic radiography?

Background: In orthodontic therapy as well as the craniofacial complex, the outside gonial Angle is a critical angle. Because lateral cephalometric radiographs show superimposed representations of anatomical structures, including gonial angle; The purpose of this research would have been to compare panoramic as well as lateral cephalometric radiographs in order to evaluate gonial angle within angle classifying. Materials and Methods: The current study included 64 individuals (29 males and 35 females) ranging in age from 15 to 30 years. The individuals have been chosen retrospectively from the dental and skeletal Classes I, II, as well as III malocclusion groups. Mandibular as well as Ramal planes have been drawn then based on these planes that used a lateral cephalometric radiograph. To calculate the gonial angle, two tangents had been derived from the mandible lower border, the condyle's posterior margins, in addition the ramus on individually sides of panoramic radiographs. The variations between the three angle groups have been examined using several pairwise comparisons (ANOVA). Results: There have been no significant variations in gonial angles evaluated using lateral cephalometric radiography as well as panoramic radiography between the Classes I, II, as well as III malocclusion groups (P>0.05).

Association of Craniofacial Patterns with the Curve of Spee and the Time Required for Orthodontic Levelling.

The curve of Spee (CoS) is an important parameter for an individualized treatment plan. The available information regarding a potential association of the depth of the curve of Spee with various skeletal craniofacial characteristics is conflicting and it is also unknown whether certain craniofacial parameters affect the duration of the levelling phase of orthodontic treatment. A prospective sample of 32 patients with mild to moderate crowding that underwent orthodontic treatment with full fixed appliances was used to study these topics. The craniofacial characteristics were captured on pre-treatment lateral cephalometric radiographs and measurements of the CoS were performed on the initial 3D digital dental models using the Viewbox 4 software. Non-parametric statistics and Spearman’s correlations were applied. Weak negative correlations were detected between the CoS depth and the SNA and SNB angles. There was no other association between the CoS and craniofacial parameters, including various anteroposterior measurements. Furthermore, there was no significant association of any craniofacial parameter with the duration of the levelling. Contrary to certain clinical beliefs, it can be argued that the craniofacial characteristics are not associated with the CoS and the time required for its levelling in subjects with moderate pre-treatment CoS depth.

Evaluation of trabecular bone and mandibular cortical thickness in adults with different vertical facial types

This study investigated differences in trabecular structure and mandibular cortical thickness in adults related to vertical facial type (VFT), sex, and their interactions. Lateral cephalometric radiographs (LCRs) and panoramic radiographs (PRs) of 256 patients were reviewed. The VFT classification into low-angle, normal, and high-angle groups was determined using angular and linear measurements on LCRs. Fractal dimension (FD) values and mandibular radiomorphometric indices (RMIs) were calculated on PRs. Two-way analysis of variance revealed significant differences in FD overall among VFT groups in all sites (P < .001), with pairwise comparisons indicating the greatest values in the high-angle group in the condyle (P < .05) but in the low-angle group elsewhere (P < .001). RMIs were significantly different overall regarding VFT only in the posterior mandible (P=.004), with pairwise comparisons revealing low-angle and normal group values greater than high-angle group values (P < .05). Patient sex and the interaction of facial type and sex had no significant effect on any bone measurements. VFT had significant effects on trabecular structure at all measured sites, but cortical thickness was affected only in 1 location.

Evaluation of the Position and Incidence of Impaction of Mandibular Third Molars in Different Anteroposterior and Vertical Skeletal Patterns: A Retrospective Study

Aim: To evaluate the incidence of impacted mandibular third molar in different anteroposterior and vertical facial skeletal patterns and to evaluate the angle of impaction of mandibular third molar.&#x0D; Methodology: 207 Panoramic and lateral cephalometric radiographs for patients above 20 years old with impacted mandibular third molar were recruited from the orthodontic department clinics in multiple universities in Egypt and traced using WebCeph ™ software. From the lateral cephalograms, three anteroposterior measurements were taken which were termed as ANB, A-B difference and Wits appraisal and three vertical angles were measured which were SN/MP, MMPA and FMPA to determine different skeletal facial types. The angulation of mandibular third molar impaction was determined by β angle according to Winter’s classification from the orthopantomogram.&#x0D; Results: Among all 207 analyzed cases, impacted third molars were detected in (38.6%) cases&#x0D; unilaterally and (61.4%) bilaterally. Anteroposteriorly, the higher percentage of total impactions was found in subjects with a class 2 skeletal pattern (97.2%). Vertically, the higher percentage of total impactions was found in subjects with a mesocephalic facial pattern (45.9%). The most common type of impaction was mesioangular based on Winter’s classification.&#x0D; Conclusions: A higher incidence of lower third molar impaction was found in subjects with a class 2 skeletal pattern. A higher incidence of lower third molar impaction was found in subjects with a mesocephalic facial pattern. In almost all skeletal facial types, the mesioangular position of the impacted mandibular third molar was the most prevalent position.

Shape Visualization of Dental Inclination in Class I and Bimaxillary Protrusion Malocclusions through Geometric Morphometric Analysis

Objectives: This study aimed to determine the shape of dental inclination between Class I malocclusion and bimaxillary protrusive Malay patients using geometric morphometric analysis obtained from lateral cephalometric radiographs. Materials and Methods: 128 Malay patients who met the inclusion criteria were recruited; of which 64 patients were in Class I malocclusion and another 64 patients in bimaxillary protrusion groups. Samples were in the age range of 18 to 40 years old, with a gender distribution of 41 males and 87 females. Pre-treatment orthodontic lateral cephalometric radiograph were traced and digitized. Thirteen landmarks of each radiograph were incorporated and converted into coordinates using TPSUtil software. The plots were then exported to MorphoJ Software for multiple Geometric Morphometric Analysis (GMA). Results: The results showed that there was a statistically significant difference (p&lt;0.01) in shape of dental inclination between the groups. Discriminant analysis and cross validation of these groups demonstrated 98% accuracy in identifying two types of dental malocclusion. The grid graphs illustrated the shape of dental inclination of the bimaxillary protrusion group as being significantly more proclined when compared to Class I malocclusion. Conclusion: This study concludes that the dissimilarities in dental inclination are identifiable in Class I malocclusion and bimaxillary protrusion and the shape differences can be visualized using geometric morphometric analysis.

Is there a relationship between sella turcica calcification and thyroid cartilage calcification? A random study using lateral cephalometric radiography

Thyroid cartilage changes begin in the second decade of life with the horn of the thyroid cartilage, and spread throughout the individual’s lifetime to other cartilage plates. However, the objective of the present study is to assess if there is an association between thyroid calcification (TC) and sella turcica bridging (STB). Forty patients, 11 men and 29 women, aged between 40 and 62 years with a mean age of 48.6 years were studied. The sample inclusion criteria of this study were age in the fourth decade, no craniofacial deformities, no history of craniofacial surgical intervention, good-quality lateral cephalometric radiographs, and good visualization of the sella turcica (ST). A total of 40 registered patients were included in the assessment of calcification of the thyroid cartilage. Of these, 75% presented with thyroid calcifications, and 25% did not. Data on sex was available for all 40 registered patients. A total of 72.5% were female, and 27.5% were male. While in a comparison between calcification of the thyroid and calcification of the sella turcica, no statistical relationship was observed between the two variables. Thyroid cartilage calcification could be considered a normal part of the ageing process, while STB could appear on lateral radiographs due to superimposition of the anatomical structures. In this study, we found no relationship between thyroid cartilage calcification and STB, and a larger patient sample is required for evaluating calcification of the thyroid and STB.

Evaluation of two different imaging software programs in planning orthognathic surgery cases

Aim: In this study, we aimed to compare the two-dimensional predictions made by two computer software packages with the postoperative values, and thus to evaluate the clinical reliability of digital orthognathic surgery planning. Methodology: Orthodontic treatment was performed before orthognathic surgery, and the same surgical team performed double-jaw orthognathic surgeries. We included 20 individuals (10 females, 10 males) with skeletal Class III malocclusion. The average age of the individuals was 21.5 years. In our study, the amount of movement was determined using reference lines on lateral cephalometric radiographs obtained from the preoperative and postoperative Cone-Beam Computed Tomography (CBCT) records of 20 individuals. Prediction profiles were formed using Dolphin Imaging (Dolphin Imaging &amp; Management Solutions, Chatsworth, CA, USA) and NemoFAB 2D (Software Nemotec, S.L, Spain) computer softwares. In this way, the reliability and consistency of two-dimensional prediction software were examined. Results: The prediction profiles obtained from the computer software were compared with lateral cephalometric radiographs of the postoperative surgery results for 37 cephalometric parameters. There were no significant differences between software predictions and postoperative results in any cephalometric parameters. Conclusion: The plans and predictions made with the two computer software packages were reliable and can be used clinically. How to cite this article: Balkı M, Doğru M. Evaluation of two different imaging software programs in planning orthognathic surgery cases. Int Dent Res 2022;12(2):70-81. https://doi.org/10.5577/intdentres.2022.vol12.no2.5 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Lateral cephalometric radiograph analysis on obstructive sleep apnea patients

Objectives: This review article is aimed to investigate changes in anatomical factors in Obstructive Sleep Apnea (OSA) patients through means of a cephalometric radiograph, which covers relation and size.&#x0D; Review: This literature review used online databases (PubMed and Scopus) discussing obstructive sleep apnea (OSA) in adults aged 18-80 years, using cephalometric analysis, and several keywords such as “obstructive sleep apnea and cephalometry” were employed to do the literature search. The search was limited to full-text articles written in English and published during the 2011-2021 period. Articles were selected by complying with literature review guidelines.&#x0D; Conclusion: Dentists can detect OSA early through lateral radiograph, which is originally an early screening tool, by paying attention to patients’ position during exposure, irradiation condition (kV, mA and Sec) and patient position in OSA diagnosis in regards to hard and soft tissue being evaluated. The specific craniofacial morphological variable could be a reliable parameter in determining the existence of OSA.

REPRODUCIBILITY AND RELIABILITY OF CEPHALOMETRIC LANDMARK DETECTION USING THE CEFBOT ARTIFICIAL INTELLIGENCE SOFTWARE

<h3>Objectives</h3> Evaluate the reproducibility and reliability of a Cefbot-AI software in the identification of cephalometric points in lateral cephalometric radiographs. <h3>Study Design</h3> Thirty lateral cephalometric radiographs obtained with Orthophos XG5/Ceph (Dentsply Sirona, Pennsylvania) were selected, and 19 cephalometric points were marked on each radiograph by a control (ECont) and a calibrated (ECal) examiner and by the Cefbot-AI software (RadioMemory, Belo Horizonte, Brazil). Reliability was assessed by a new analysis of the radiographs 15 days after the first record. Statistical significance was set at <i>P</i> < .05. <h3>Results</h3> Excellent reliability was observed in the landmarks of all examiners, as well as in those made by Cefbot-AI (mean intraclass correlation coefficient >0.93). As for reproducibility, comparisons between the performance of ECont and ECal revealed some cephalometric points with a statistically significant difference on the <i>x</i>-axis, namely, S (<i>P</i> = .048), Po (<i>P</i> < .001), and ENA (<i>P</i> = .013). ECont and Cefbot revealed only 1 point, Or (<i>P</i> = .010), with a statistically significant difference on the <i>x</i>-axis. No statistically significant differences were found on the <i>y</i>-axis. <h3>Conclusions</h3> Excellent reliability and good reproducibility of Cefbot-AI was observed, suggesting that Cefbot is an excellent auxiliary tool for cephalometric analysis but still dependent on professional assessment for clinical use.

The relationship of masseter muscle thickness with face morphology and parafunctional habits: an ultrasound study.

The aim of this study was to determine the normal range of masseter muscle thickness by ultrasonographic measurement in individuals over 15 years of age, and to evaluate its relationship with age, gender, facial morphology, body mass index and parafunctional habits. The study was conducted on 115 volunteers whose lateral cephalometric radiography was performed within the indication in Gazi University Faculty of Dentistry, Department of Dentomaxillofacial Radiology. The participants in the study were asked questions about their parafunctional habits, age, height and weight. Individuals were grouped as hypodivergent (n = 28), normdivergent (n = 55), or hyperdivergent (n = 32) according to vertical face morphology by making measurements on lateral cephalometric films. Right and left masseter muscle thicknesses of individuals were measured by ultrasonography while at rest and in contraction. The mean value of masseter muscle thickness was found to be 13.57 ± 2.57 mm. The rest and contracted muscle thicknesses were significantly higher in males than in females for the right and left masseter muscles (p < 0.05). When the masseter muscle was at rest and contracted, its thickness was higher in individuals with hypodivergent facial morphology, than in the other groups. No statistically significant difference was found in terms of masseter muscle thickness between individuals having parafunctional habits and those who did not have parafunctional habits (p > 0.05). Although masseter muscle thickness varied according to vertical facial morphology, this was not the case for parafunctional habits.

The association of polymorphisms in BMP2/MYO1H and skeletal Class II div.1 maxillary and mandibular dimensions. A preliminary ‘report

IntroductionThe genetic impact directly or indirectly predefines maxillofacial dimensions, potentially leading to an inappropriate relationship of the jaws and subsequently skeletal malocclusion. Previous studies focused mainly on genetic polymorphisms and class III malocclusion. This study was set out to investigate the association between genetic polymorphisms in two genes BMP2 (rs235768) and MYO1H (rs11066446) with Class II division 1 malocclusion, skeletal variation in vertical plane, and maxillary and mandibular jaws length. Subjects and methodsSixty patients classified as Skeletal Class I (n = 30) and Class II division 1 (n = 30) were recruited. DNA was extracted from saliva and analyzed by Sanger sequencing. Lateral cephalometric radiographs were measured for the anterio-posterior relationship of maxillary and mandibular arch using digital tracing. Hardy-Weinberg equilibrium analysis of genotype frequencies was performed using Chi-square test to compare genotype distribution among groups and multiple logistic regression analysis adjusted by gender was also performed. ResultsThe rs235768 polymorphism in BMP2 was associated with hypodivergent face, increased maxillary length, and decreased mandibular length. Meanwhile, the rs11066446 polymorphism in MYO1H was associated with decreased mandibular length. New polymorphism was identified in MYO1H (rs10850090) in association with decreased mandibular length. ConclusionA potential association between polymorpisms in BMP2 rs235768 and MOY1H rs11066446 and rs10850090 and Class II division 1 skeletal malocclusion related phenotypes exists, however, the degree of it has to be further investigated and yet to be discovered.

Soft tissue profile changes of patients treated with two different passive self ligating systems

Introduction: Orthodontists have been quite concerned about how orthodontic therapy, whether it involves tooth extraction or not, may affect the facial profile. The aim of the study was to compare the soft tissue profile alterations in patients with Class I malocclusions who underwent non extraction treatment protocol with AO and Damon passive self ligating bracket systems. Materials and methodology: Patients treated with passive self ligating brackets either Damon Q or AO were included in the study. This in vivo study consisted of 2 groups; each group had 10 subjects. Group 1: Damon passive self-ligating bracket, Group 2: AO passive self-ligating bracket. Data was compiled from lateral cephalometric radiographs taken before and after orthodontic treatment. Five linear and five angular soft tissue parameters were used in the study. An independent t test was performed to determine the mean difference between linear and angular soft tissue parameters in the AO and Damon passive self ligating groups. Results: The results of the independent t test showed that there was no statistical significant difference in any of the linear or angular parameters between the two groups(p&lt;0.05).

Artificial intelligence-based cephalometric landmark annotation and measurements according to Arnett's analysis: can we trust a bot to do that?

To assess the reliability of CEFBOT, an artificial intelligence (AI)-based cephalometry software, for cephalometric landmark annotation and linear and angular measurements according to Arnett's analysis. Thirty lateral cephalometric radiographs acquired with a Carestream CS 9000 3D unit (Carestream Health Inc., Rochester/NY) were used in this study. The 66 landmarks and the 10 selected linear and angular measurements of Arnett's analysis were identified on each radiograph by a trained human examiner (control) and by CEFBOT (RadioMemory Ltd., Belo Horizonte, Brazil). For both methods, landmark annotations and measurements were duplicated with an interval of 15 days between measurements and the intraclass correlation coefficient (ICC) was calculated to determine reliability. The numerical values obtained with the two methods were compared by a t-test for independent variables. CEFBOT was able to perform all but one of the 10 measurements. ICC values > 0.94 were found for the remaining eight measurements, while the Frankfurt horizontal plane - true horizontal line (THL) angular measurement showed the lowest reproducibility (human, ICC = 0.876; CEFBOT, ICC = 0.768). Measurements performed by the human examiner and by CEFBOT were not statistically different. Within the limitations of our methodology, we concluded that the AI contained in the CEFBOT software can be considered a promising tool for enhancing the capacities of human radiologists.

The dimensional and morphological assessment of frontal air sinus in different ages, genders and ethnicities (Arabian-Caucasian and Han-Chinese sub-populations).

This study aimed to assess the dimensional and morphological measurements of the frontal air sinuses in different ages and genders in the two ethnicities. This retrospective study included 360 subjects (160 males and 200 females) of both ethnicities. Subjects were divided based on age and gender into four groups, including an equal number of both males and females, for each age and ethnic group. The frontal air sinus dimensions were measured utilizing lateral cephalometric radiographs and computed using Winceph version 9.0 software. The frontal air sinus dimensions were compared between age groups in both genders and between ethnicity using an independent sample t test. The relationship between the frontal air sinus dimensions and subjects' age was evaluated using Pearson's correlation coefficient. The frontal air sinuses measurements were larger in males than females in both ethnicities, except for the frontal sinus index, which was found to be larger in females than males. The frontal air sinus surface area and height showed statistically significant differences between the two age groups in both ethnicities (P < 0.05). The Arabian-Caucasian patients had a larger frontal sinus surface area, height, and depth than the Han-Chinese patients in both age groups. The size of the frontal air sinus increases with age; and continues to expand after the age of 20years. Based on the Arabian-Caucasian and Han-Chinese sub-population findings, the frontal sinus is an effective tool for determining gender and appears to have potential in ethnicity identification.

A Comparative Assessment of the Upper Pharyngeal Airway Dimensions among Different Anteroposterior Skeletal Patterns in 7-14-Year-Old Children: A Cephalometric Study.

Background: The pharyngeal airway is a crucial part of the respiratory system’s function. Assessing the pharyngeal airway dimensions in different skeletal types is important in the orthodontic treatment of growing patients. The aim of this study was to compare the upper pharyngeal airway dimensions of 7–14-year-old children with different skeletal types. Methods: Three-hundred-sixty-one lateral cephalometric radiographs were grouped based on their skeletal patterns determined by the ANB angle as skeletal type I (n = 123), type II (n = 121), and type III (n = 117). The radiographs were divided into 4 groups: 7/8 YO (7–8 years old), 9/10 YO, 11/12 YO, and 13/14 YO. The cephalometric measurements comprised SNA, SNB, ANB, Ad1-PNS, Ad2-PNS, McUP, and McLP. An ANOVA was used to compare the group results. Results: Significant differences in Ad1-PNS, Ad2-PNS, McUP, and McLP in skeletal types II and III were found between age groups. Most upper pharyngeal airway dimensions in skeletal types II and III children were significantly wider in the 13/14 YO group than in the other age groups. Conclusion: The upper pharyngeal airway dimensions increased age-dependently in 7–14-year-old children, especially in skeletal types II and III. The upper pharyngeal airway dimensions could serve as a guide in differentiating the different skeletal classes in clinical settings.