Age-Dependent Three-Dimensional Evaluation of the Spheno-Occipital Synchondrosis Using Computed Tomography

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Arezoo Jahanbin ◽  
Shirin Dokht Shirazi ◽  
Elaheh Kamyabnezhad ◽  
Neda Eslami ◽  
Seyed Hosein Hoseini Zarch
Keyword(s):  
Developmental Stage ◽  
Three Dimensional ◽  
Cross Sectional ◽  
Old Patients ◽  
Significant Difference ◽  
Growth Center ◽  
Different Populations ◽  
Males And Females ◽  
Ossification Process ◽  
Age And Sex

Background: The spheno‐occipital synchondrosis (SOS) is an important growth center which plays an important role in cranial base development and can define the final relation of SOS with the upper and lower jaws. The morphology and fusion degree of SOS varies in different ages among different populations. Objectives: Thus, the aim of this study was to evaluate the age and sex dependence of ossification of the spheno-occipital synchondrosis in the Iranian population using CBCT. Methods: This cross-sectional retrospective study was performed on 517 CBCT images of 6- to 18-year-old patients in Mashhad, Iran. Patients with obvious pathology or fractures were excluded from the study. The SOS ossification was classified into four stages from 0 to 3. Two independent observers scored the images. The ossification stage of the SOS was classified according to the age and sex of the patients. Kruskal-Wallis and Kendall’s tau-b used for statistical analysis. Results: In this study, 517 samples of 260 females (50.3%) and 257 males (49.7%) with a mean age of 12.03 ± 3.74 years were examined. A significant difference did not exist between males and females regarding their stage of SOS ossification, although males were younger at the SOS transitional stages of 0 to 1, and 1 to 2 compared to females. Also, the SOS starts the ossification process at the age of 11 in females and 10.8 in males. Conclusions: The present study showed in the mean age of 16.81 ± 1.12 years, most subjects were in developmental stage 3. Due to the fact that in developmental stage 3 SOS closes, there were no passive maxillary growth after this time. In none of the SOS stages, females and males differed significantly in mean age (P > 0.05). The age of the onset of SOS closure in females was 11 years and in males it was about 10.8 years.

scholarly journals Occlusal Characteristics and Spacing in Primary Dentition: A Gender Comparative Cross-Sectional Study

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Madhuri Vegesna ◽  
R. Chandrasekhar ◽  
Vinay Chandrappa
Keyword(s):  
Cross Sectional Study ◽  
Primary Dentition ◽  
Clinical Approach ◽  
Primary Molar ◽  
Cross Sectional ◽  
Normal Occlusion ◽  
Class 1 ◽  
Study Population ◽  
Different Populations ◽  
Males And Females

Context. Occlusion in primary teeth varies among children of different populations and races. Aim. To assess and compare the occlusal characteristics and spacing in primary dentition among 3–6-year-old Dravidian children. Materials and Methods. The study included 2281 school going children. The primary molar relation, canine relation, overjet, and overbite were assessed using Foster and Hamilton criteria. Spacing conditions were registered according to Kisling and Krebs criteria. Results. The flush terminal plane molar relation (80.3%) was the most common primary molar relation. The distal step molar relation was more frequently found in female children (12.8%) than in males (8.6%). Class 1 canine relation was the most prevalent canine relation (81.3%) among males and females. Ideal overjet (84.3%) and overbite (72.7%) were observed among the majority of the children. Spaced type of arches occurred more frequently than closed arches in this sample. The incidence of primate spaces was more in males than in females. Conclusion. The study population has fewer deviations from normal occlusion which indicates decreased tendency for malocclusion in permanent dentition. However, further longitudinal studies are necessary to identify the potential limitations of a clinical approach relying on early orthodontic diagnosis and intervention.

scholarly journals Teacher Discrimination Reduces School Performance of African American Youth: Role of Gender

2018 ◽  
Vol 8 (10) ◽  
pp. 183 ◽  
Author(s):  
Shervin Assari ◽  
Cleopatra Howard Caldwell
Keyword(s):  
African American ◽  
School Performance ◽  
African American Youth ◽  
National Sample ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Grade Point ◽  
Significant Difference ◽  
Males And Females

Background: Gender may alter African Americans’ vulnerability to discrimination. The type of outcomes that follow exposure to discrimination may also be gender-specific. Although teacher discrimination is known to deteriorate school performance, it is yet unknown whether male and female African American youth differ in the effect of teacher discrimination on school performance. Objective: This cross-sectional study explored the moderating role of gender on the effect of teacher discrimination on school performance in a national sample of African American youth. Methods: The National Survey of American Life-Adolescent Supplement (NSAL-A) enrolled a nationally representative sample (n = 810) of 13–17-year-old African American youth. Demographic factors, socioeconomic status, teacher discrimination, and school performance (grade point average, GPA) were measured. Linear multivariable regression models were applied for data analysis. Results: Males and females reported similar levels of perceived teacher discrimination. In the pooled sample, higher teacher discrimination was associated with lower school performance among African American youth (b = −0.35; 95% confidence interval (CI) = −0.49 to −0.22). Gender interacted with perceived teacher discrimination (b = 12; 95% CI = 0.24–2.02), suggesting a significant difference between males and females in the magnitude of the association between perceived teacher discrimination and GPA. In stratified models, perceived teacher discrimination was associated with worse school performance of females (b = −12; 95% CI = −0.03 to −2.78) but not males (b = 0.01; 95% CI = −0.07 to 0.08). Conclusion: In line with previous studies, gender was found to alter the vulnerability of African American youth to perceived discrimination. African American boys and girls may differ in their sensitivity to the effects of teacher discrimination on school performance.

scholarly journals Knowledge, Attitudes and Practice of Dental Implants among Dental Interns in Saudi Arabia – A Cross-Sectional Study

2020 ◽  
Vol 14 (1) ◽  
pp. 440-449
Author(s):  
Khaled Alzahrani ◽  
Abdulrahman Mohammed Alnafisah ◽  
Khalid Gohormallah Alzahrani ◽  
Khalid Ghalib Alharbi
Keyword(s):  
Saudi Arabia ◽  
Dental Implants ◽  
Clinical Skills ◽  
Sampling Technique ◽  
Practical Experience ◽  
Cross Sectional Study ◽  
Chi Square ◽  
Cross Sectional ◽  
Significant Difference ◽  
Males And Females

Objective: The aim of the study is to assess knowledge, attitude and practices of dental implants among dental interns in Saudi Arabia Materials and Methods: A self-designed, close-ended questionnaire was distributed among 205 interns chosen by stratified random sampling technique. The questionnaire consisted of 28 items pertaining to demographic characteristics, knowledge and practices of dental implants. Responses were coded and entered into spreadsheet software (Microsoft Excel 16.0.) and analyzed using Statistical Package for Social Sciences (SPSS, IBM Version 22.0) and contingency tables and chi-square test (χ2). Results: The majority of the participants were males (64.4%), between 24-26 years of age (64%) and had a GPA between 4-5 (63.4%). The majority of the participants gained knowledge of dental implants through theoretical lectures (98.5%), and most of them (80%) knew, what material, an implant was made up of. Almost all participants (91.7%) knew that dental implants had surface modifications. Most (64.4%) believed that case selection is the most important criteria for the success of dental implant therapy, and this differed significantly among participants with respect to GPA (p=0.03). Many participants (60%) believed that the most important advantage of dental implants over fixed prosthesis is that reduction of adjacent tooth is not needed, and this differed significantly between males and females (p=0.026). There was a significant difference (p<0.001) between males and females when it came to confidence in independently restoring teeth using dental implants. 63% of the participants were confident to use dental implants in their future practice. Conclusion: Knowledge of dental implants among dental interns is satisfactory, but this study reveals that participants lack practical experience and would like to acquire more clinical skills. Limitations: The response rate of participants from each university was low, which made comparisons between different universities difficult because sample size from some universities was very small, which could not produce statistically accurate results.

Reference range of fetal myocardial area by three-dimensional ultrasonography and its applicability in fetuses of pre-gestational diabetic women

2019 ◽  
Vol 47 (4) ◽  
pp. 422-428 ◽  
Author(s):  
José Francisco Melo Júnior ◽  
Nathalie Jeanne Bravo-valenzuela ◽  
Luciano Marcondes Machado Nardozza ◽  
Alberto Borges Peixoto ◽  
Rosiane Mattar ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Goodness Of Fit ◽  
Reference Range ◽  
Polynomial Regression ◽  
Three Dimensional ◽  
Image Correlation ◽  
Coefficient Of Determination ◽  
Cross Sectional ◽  
Myocardial Area ◽  
Significant Difference

Abstract Objective To determine the reference range for the myocardial area in healthy fetuses using three-dimensional (3D) ultrasonography and validate these results in fetuses of pregnant women with pre-gestational diabetes mellitus (DM). Methods This cross-sectional retrospective study included 168 healthy pregnant women between gestational weeks 20 and 33+6 days. The myocardial area was measured using spatio-temporal image correlation (STIC) in the four-chamber view. Polynomial regression models were used, and the goodness of fit of the models were evaluated by the coefficient of determination (R2). Intra- and inter-observer reproducibility was determined using the concordance correlation coefficient (CCC). Validation was performed in 30 pregnant women with pre-gestational DM. Results There was a strong correlation (R2=0.71, P<0.0001) between myocardial area and gestational age. There was good intra- and inter-observer reproducibility, with a CCC of 0.86 and 0.83, respectively. However, there was no significant difference in the mean myocardial area between healthy fetuses and fetuses of women with pre-gestational DM (0.11 cm2, P=0.55). Conclusion The reference range was determined for the myocardial area in fetuses, and there was no significant difference in this variable between healthy fetuses and the fetuses of women with pre-gestational DM.

scholarly journals Who Spends More on Health Expenditures among Elderly? Men or Women?

2020 ◽  
Author(s):  
Tika Dwi Tama ◽  
Nurnaningsih Herya Ulfa ◽  
Anindya Hapsari
Keyword(s):  
Health Expenditure ◽  
Health Expenditures ◽  
Health Costs ◽  
Health Coverage ◽  
Self Medication ◽  
Cross Sectional ◽  
Medication Costs ◽  
Elderly Males ◽  
Significant Difference ◽  
Males And Females

Women face various health problems during their lives. This has an impact on health costs that must be paid. Gender bias tends to place women in subordinate positions, so they have limited power in making a decision. This study aimed to examine whether gender is a factor impacting health expenditures among the elderly. A cross-sectional study based on the Indonesian Family Life Survey (IFLS) wave 5 included all elderly who accessed self-medication and health services in health facilities during the past 12 months (n=6773). Data regarding outpatient, inpatient, and self-medication costs was obtained from section RJ, RN, and PS from book 3B IFLS wave 5. The health costs that come out of the personal pocket resulted from the total cost of treatment that paid for self-medication, outpatient, and inpatient. Independent T-Test was performed to analyze the difference in health expenditure between elderly males and females. This study found that the average health expenditure was higher among elderly males (IDR 471,011; SD 7,103,932.7) than females (IDR 296,969.9; SD 2,552,816.4), but it was not statistically significant (p=0.195). Based on the type of health expenditure, there was no significant difference in self-medication spending between elderly males and females, as well as in outpatient and inpatient expenditures (p>0.05). Nevertheless, elderly males tended to spend more money on self-medication, outpatient, and inpatient services than females. It concluded that health expenditures between elderly males and females were almost the same. Gender equality in health care was addressed to establish universal health coverage. Keywords: gender, health expenditure, IFLS, elderly, out-of-pocket

scholarly journals Three-dimensional volumetric evaluation of the different mandibular segments using CBCT in patients affected by juvenile idiopathic arthritis: a cross-sectional study

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Davide Cavagnetto ◽  
Andrea Abate ◽  
Alberto Caprioglio ◽  
Paolo Cressoni ◽  
Cinzia Maspero
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Three Dimensional ◽  
Pairwise Comparison ◽  
Cross Sectional Study ◽  
Control Group ◽  
Case Group ◽  
Unaffected Side ◽  
Cross Sectional ◽  
Affected Side ◽  
Significant Difference

Abstract Background There is currently no information on how different mandibular segments are affected by juvenile idiopathic arthritis. The aim of this paper is to assess volumetric differences of different mandibular segments in subjects with unilateral and bilateral JIA and to compare them with non-JIA control volumes. Materials and methods Forty subjects with unilateral TMJ involvement and 48 with bilateral TMJ involvement were selected for the case group and 45 subjects with no known rheumatic comorbidities for the control group. The mandible of each subject was divided according to a validated method into different paired volumes (hemimandible, condyle, ramus and hemibody). Results The ANOVA test revealed a statistically significant difference in all the groups for condylar and ramus volumes, and the pairwise comparison evidenced a statistically significant higher condylar and ramus volume in the control group (1444.47 mm3; 5715.44 mm3) than in the affected side in the unilateral JIA group (929.46 mm3; 4776.31 mm3) and the bilateral JIA group (1068.54 mm3; 5715.44 mm3). Moreover, there was also a higher condylar volume in the unaffected side in the unilateral JIA group (1419.39 mm3; 5566.24 mm3) than in the bilateral JIA group and the affected side in the unilateral JIA group. Conclusions The affected side of unilateral JIA patients showed statistically significant lower volumes in the hemimandible, in the condyle and in the ramus. The largest total mandibular volume was observed in the control group, followed by the unilateral JIA group and, lastly, by the bilateral JIA group.

scholarly journals Correlation between the occlusal vertical dimension and the pupil rima oris distance among Sundanese population

2017 ◽  
Vol 29 (2) ◽  
Author(s):  
Nur Emalina Akhma ◽  
Taufik Sumarsongko ◽  
Rasmi Rikmasari
Keyword(s):  
Rank Correlation ◽  
Vertical Dimension ◽  
Strong Correlations ◽  
Cross Sectional ◽  
Spearman’S Rank Correlation ◽  
Measuring Devices ◽  
Significant Difference ◽  
Occlusal Vertical Dimension ◽  
Males And Females ◽  
Correlation Statistic

Introduction: Among the most complex restorative challenges for a dentist is that related to determine the occlusal vertical dimension (OVD). Objective methods of determining the OVD offers significant advantages because no radiographs or other special measuring devices are required. Previous review said that the OVD is similar to the pupil-rima oris distance among the population of India. The purpose of this study was to compare whether there was differences between the OVD and the pupil-rima oris distance among Sundanese population. Method: This study was an analytical cross sectional approach. A total of fifty Sundanese students of Faculty of Dentistry, Universitas Padjadjaran who have fulfilled all criteria were chosen randomly to be measured the OVD and the pupil-rima oris distance. Result: Results showed that there was no significant difference between the OVD and the pupil-rima oris distance (α=5%). There were strong correlations between the OVD and the pupil-rima oris distance (p<0.05). An analysed with Spearman’s rank correlation statistic (α=5%) reveals that there was a significant difference between males and females in the OVD and the pupil-rima oris distance. Conclusion: Based on the analysed data, we can conclude that there wass no significant difference between the OVD and the pupil-rima oris distance, thus, the pupil-rima oris distance can be suggested as an objective method to determine the length of OVD in Sundanese population.

scholarly journals Frequency Distribution of Hepatitis C Virus Genotypes with Reference to Age and Sex in Various Districts of Khyber Pakhtunkhwa, Pakistan

2021 ◽  
pp. 83-88
Author(s):  
Bakht Biland ◽  
Mohsina Haq ◽  
Sardar Muhammad ◽  
Mohsan Subhani ◽  
Syed Gardezi ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Age Groups ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Female Population ◽  
Khyber Pakhtunkhwa ◽  
Significant Difference ◽  
Age And Sex ◽  
Genotype 3A

Background: Pakistan has the second highest prevalence of hepatitis C in the world after Egypt. Viral hepatitis is a leading cause of morbidity and mortality in Pakistan and, worryingly, reinfection rates are also on the rise. This cross-sectional study was aimed at finding the most common genotypes of hepatitis C in terms of age and sex in a Pakistani cohort. Materials and methods: The authors collected blood samples from 1,260 patients with diagnosed hepatitis C visiting a primary teaching hospital affiliated with Peshawar Medical College, Pakistan, from different districts of Khyber Pakhtunkhwa, Pakistan, between January 2017 and April 2019. Hepatitis C virus RNA was quantified by real-time polymerase chain reaction and genotyping was then performed. Results: The authors found that genotype 3a was the most prevalent type followed by 1a, mixed, and 3b, respectively. Genotypes 2a and 1b were the least prevalent in Khyber Pakhtunkhwa. The most common genotype was 3a, observed in 75.87% of cases. The most common mixed genotype was 3a+1a, observed in 39 cases (3.10%); it had a prevalence of 3.49% in females compared with 2.70% in males. Overall, the most common age group affected by hepatitis C virus was 41–50 years (31.35%), followed by the 51–60 years group (24.45%). Infection rate was comparatively low in other age groups. A significant difference was observed in the prevalence of genotype 3a and 2a among different districts. Conclusion: The authors concluded that genotype 3a was the most prevalent genotype and it was observed more frequently in the female population, with a median age of 45 years.

scholarly journals Radiographic Evaluation of Soft Palate Morphology and Correlation with Gender on Lateral Cephalograms

2015 ◽  
Vol 6 (3) ◽  
pp. 147-149 ◽  
Author(s):  
Kalyana Chakravarthy Pentapati ◽  
Komal Smriti ◽  
Keerthilatha Muralidhar Pai ◽  
Ravindranath Vineetha
Keyword(s):  
Soft Palate ◽  
Sleep Apnea Syndrome ◽  
Cross Sectional Study ◽  
Radiographic Examination ◽  
Radiographic Evaluation ◽  
Cross Sectional ◽  
Obstructive Sleep ◽  
Lateral Cephalograms ◽  
Significant Difference ◽  
Males And Females

ABSTRACT Objective To investigate the variation of the soft palate morphology and the proportional differences of the morphology of soft palate between males and females. Materials and methods We conducted a cross-sectional study in department of oral medicine and radiology. Lateral cephalometric radiographs of individuals subjected to radiographic examination for orthodontic purpose were retrieved. A total of 100 digital lateral cephalograms of normal healthy individuals (50 males and 50 females) who were aged 15 to 45 years were retrieved. Results Type 1 was most commonest shape of the soft palate (30%) followed by type 6 (19%), types 2 and 3 (17 and 17%), type 4 (11%) with least being type 5 (6%). There was no significant difference in the distribution of shape of soft palate between males and females (p = 0.312). Conclusion This classification can help us better understand the diversity of the velar morphology and can be used as references for the research of velopharyngeal closure in cleft palate individuals, obstructive sleep apnea syndrome (OSAS) and other conditions. How to cite this article Smriti K, Pai KM, Vineetha R, Pentapati KC. Radiographic Evaluation of Soft Palate Morphology and Correlation with Gender on Lateral Cephalograms. World J Dent 2015;6(3):147-149.

Plexus-specific retinal capillary avascular area in exudative age-related macular degeneration with projection-resolved OCT angiography

2020 ◽  
pp. bjophthalmol-2020-317562
Author(s):  
Liqin Gao ◽  
Jie Wang ◽  
Qisheng You ◽  
Yukun Guo ◽  
Christina J Flaxel ◽  
...  
Keyword(s):  
Macular Degeneration ◽  
Three Dimensional ◽  
Age Related Macular Degeneration ◽  
Retinal Layer ◽  
Cross Sectional ◽  
Avascular Area ◽  
Age Related ◽  
Significant Difference ◽  
Retinal Capillary ◽  
Capillary Plexus

ObjectiveTo detect the plexus-specific retinal capillary avascular area in exudative age-related macular degeneration (EAMD) with projection-resolved optical coherence tomography angiography (PR-OCTA).Methods and analysisIn this prospective cross-sectional single centre study, eyes with treatment-naïve EAMD underwent macular 3×3 mm OCTA with AngioVue system. OCTA scans were analysed and processed including three-dimensional projection artefact removal, retinal layer semi-automated segmentation and en face angiogram generation. Automated quantification of extrafoveal (excluding the central 1 mm circle) avascular area (EAA) were calculated on projection-resolved superficial vascular complex (SVC), intermediate capillary plexus (ICP) and deep capillary plexus (DCP), respectively.ResultsNineteen eyes with EAMD and 19 age-matched healthy control eyes were included. There was no significant difference between the EAMD and control eyes in terms of age, sex, axial length and mean ocular perfusion pressure (all p>0.05). Compared with control eyes, EAMD eyes had significantly larger EAA in SVC (median 0.125 vs 0.059 mm2, p=0.006), ICP (0.016 vs 0.000 mm2, p=0.004) and DCP (0.033 vs 0.000 mm2, p＜0.001).ConclusionPR-OCTA showed that EAMD is associated with focal avascular area in all the three retinal vascular plexuses.

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