scholarly journals Antilingula as a Surgical Reference Point for Vertical Ramus Osteotomy

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Han-Sheng Chen ◽  
Ying-Sheng Chen ◽  
I-Ling Lin ◽  
Chun-Feng Chen
Keyword(s):  
Pearson Correlation ◽  
Cone Beam ◽  
Strongly Correlated ◽  
Class Iii ◽  
Mandibular Ramus ◽  
Measuring Point ◽  
Male Patients ◽  
Pearson Correlation Analysis ◽  
The Right ◽  
Vertical Ramus Osteotomy

Purpose. This study investigated the antilingula and its related landmarks, the mandibular rami, by using cone-beam computed tomography (CBCT). Methods. CBCT images of 37 patients (74 sides of the mandibular ramus) were collected. The landmarks of antilingula (AntiL), anterior ramus (A), posterior ramus (P), superior ramus (S), and inferior ramus (I) were identified. The distances (A-AntiL, P-AntiL, S-AntiL, and I-AntiL) were statistically evaluated according to gender, side (right and left), and skeletal patterns. Results. The distance from the antilingula to the anterior (A-AntiL) border of the ramus was significantly longer on the right side (14.69 mm) than on the left side (13.97 mm). Male patients had longer AntiL-P, AntiL-I, and S-I distances (18.96, 40.07, and 54.94 mm, respectively) than did female patients (16.66, 35, and 47.54 mm, respectively). Regarding skeletal patterns, the classes can be ordered as follows in terms of the measurements: class III>class II>class I. However, the differences between the classes were nonsignificant. Pearson correlation analysis revealed that gender and S-I distance were strongly correlated ( r = 0.667 ); specifically, male patients had a longer S-I distance. A-AntiL and A-P also exhibited a strong correlation ( r = 0.796 ). Conclusion. Antilingula-related distances did not differ between skeletal patterns. Among antilingula-related variables, A-AntiL could serve as a favorable measuring point during operation.

scholarly journals Cone-beam computed tomography evaluation on the changes in condylar long axis according to asymmetric setback in sagittal split ramus osteotomy patients

2016 ◽  
Vol 87 (2) ◽  
pp. 254-259 ◽  
Author(s):  
Sun-Young Lim ◽  
Tingting Jiang ◽  
Min-Hee Oh ◽  
Min-Suk Kook ◽  
Jin-Hyoung Cho ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Correlation Analysis ◽  
Cone Beam Computed Tomography ◽  
Pearson Correlation ◽  
Statistical Significance ◽  
Three Dimensional ◽  
Cone Beam ◽  
Sagittal Split Ramus Osteotomy ◽  
Pearson Correlation Analysis ◽  
The Right

ABSTRACT Objective: To determine whether the condylar rotation is affected by asymmetric setback in patients undergoing sagittal split ramus osteotomy. Materials and Methods: Thirty patients who underwent bilateral sagittal split ramus osteotomy setback surgery were divided into the two groups, symmetric setback and asymmetric setback, according to the right/left difference of setback amount (<2.0, ≥2.0 mm). Condylar long axis changes were evaluated using the three-dimensional superimposition of before and immediately after surgery cone-beam computed tomography volume images. Evaluations were performed separately in lesser setback and greater setback side in patients undergoing asymmetric setback, whereas both side condyles were evaluated together in patients undergoing symmetric setback. Condylar axis changes on axial view were correlated with setback amount or right/left setback difference using Pearson correlation analysis. Results: In general, the condylar axis change occurred in a pattern of inward rotation. The condyles in patients undergoing symmetric setback showed 3.4° rotation in average. In case of asymmetric setback, the lesser setback side showed larger value (4.3°) than the greater setback side (2.3°) with a statistical significance. In the correlation analysis, setback amount showed no significant correlation with the condylar axis changes in both groups. However, correlation with right/left setback difference showed a positive correlation in lesser setback side of patients undergoing asymmetric setback. Conclusion: The findings of this study indicate that large amount of setback alone does not contribute to the change in condylar long axis, but asymmetric setback might cause a change in condylar long axis, particularly on the lesser setback side.

scholarly journals Mandibular symphysis morphology and dimensions in different anteroposterior jaw relationships

2013 ◽  
Vol 84 (2) ◽  
pp. 304-309 ◽  
Author(s):  
Susan N. Al-Khateeb ◽  
Emad F. Al Maaitah ◽  
Elham S. Abu Alhaija ◽  
Serene A. Badran
Keyword(s):  
Correlation Coefficient ◽  
Alveolar Bone ◽  
Pearson Correlation ◽  
Class Ii ◽  
Class I ◽  
Pearson Correlation Coefficient ◽  
Strongly Correlated ◽  
Class Iii ◽  
Mandibular Symphysis ◽  
Lateral Cephalograms

ABSTRACT Objective: To assess the morphology and dimensions of mandibular symphysis (MS) in different anteroposterior jaw relationships and to investigate whether craniofacial parameters have any correlation with its shape and/or dimensions. Materials and Methods: Lateral cephalograms of subjects with Class I, Class II, and Class III skeletal relationships were traced. Several craniofacial and MS parameters were measured. MS parameters were compared between the three groups using analysis of variance and were correlated with the craniofacial parameters using the Pearson correlation coefficient. Results: Larger angle of concavity of the chin, more inclination of the alveolar bone toward the mandibular plane, and larger MS dimensions and area (P < .001) were found with a Class III skeletal relationship compared to Class I and Class II relationships. The Pearson correlation coefficient between Id-Me and AFH was r  =  0.83 and between Id-Me and LAFH it was r  =  0.81. Conclusions: The dimensions and configuration of MS in the Class III relationship were different than those in Class I and Class II relationships; the alveolar part of MS compensated for the skeletal relationship in the Class III pattern. MS dimensions were strongly correlated to anterior facial dimensions.

scholarly journals Evaluation of Retromolar Canals using Cone Beam Computer Tomography/ Avaliação do canal retromolar por meio de tomografia computadorizada de feixe cônico

2021 ◽  
Vol 4 (4) ◽  
pp. 15952-15961
Author(s):  
Ana Paula Tulio Manfron ◽  
Alessandra S. Ditzel ◽  
Flávia N.G.K. Fontão ◽  
Luciana R. Azevedo Alanis
Keyword(s):  
Cone Beam ◽  
Clinical Implications ◽  
Retromolar Foramen ◽  
Male Patients ◽  
The Mean ◽  
Research And Education ◽  
The Right ◽  
Cone Beam Computer Tomography ◽  
Retromolar Canal

The aim of this study was to evaluate the prevalence, location and clinical implications related to the presence of the retromolar canal (RMC) on cone beam computed tomography(CBCT). CBCT images of patients from Latin America Institute for Dental Research and Education - Curitiba,Pr,Brazil, was performed from June/2008 to February/2013. The interpretation was performed by a calibrated examiner, according to the criterias: presence, location and classification of the RMC variation, as well as, measurements of horizontal distances of the RMC in relation to the buccal bone cortical and diameter of these canals. A total of 751 CBCT images were interpreted: 486(64.7%) from females and 265 (35.3%) from male patients, with mean age of 54.57 (±13.23) years. The presence of RMC was observed in 58 (7.7%) patients, 23 men and 35 women. A total of 1502 hemi- mandibles were analyzed. The RMC was identified in 69(4.6%) hemi-mandibles, 44(63.8%) from females and 25(36.2%) from males. Thirty (42.8%) RMC were observed on the right side and 40 (57.2%) on the left one. The type B1 (n=33; 47.1%) was the most common, followed by the type A1 (n=18;25.7%). The mean diameter of RMC was 0.97mm (±0.44), and the mean distance between retromolar foramen and the buccal cortical of the mandible was 4.12mm (±1.35). There were no significant differences between the distances and genders, and distances and sides (p 0.05). The prevalence of RMC was 7.7% in the studied sample; they were predominantly unilateral and showed to be type B1.

scholarly journals Evaluation of Articular Eminence Inclination in Normo-Divergent Subjects with Different Skeletal Classes through CBCT

2021 ◽  
Vol 18 (11) ◽  
pp. 5992
Author(s):  
Francesco Moscagiuri ◽  
Francesco Caroccia ◽  
Chiara Lopes ◽  
Beatrice Di Carlo ◽  
Erica Di Maria ◽  
...  
Keyword(s):  
Cross Sectional Study ◽  
Cone Beam ◽  
Class Iii ◽  
Articular Eminence ◽  
Cross Sectional ◽  
Future Studies ◽  
Skeletal Class ◽  
Significant Difference ◽  
Left And Right ◽  
The Right

(1) We aimed to compare articular eminence inclination (AEI) in normo-divergent subjects (SN^GoGn = 32° ± 5°), with different anteroposterior sagittal skeletal classes through a cone beam computed generated tomography (CBCT). (2) In this cross-sectional study, CBCT records were retrospectively analysed. From the original sample of 52 CBCT records, 33 records of normo-divergent adult subjects were selected (11 Class I, 13 Class II and 9 Class III). On mid-sagittal section of the Temporomandibular Joint (TMJ) on both sides, AEI was calculated by graphic method. (3) The Kruskal–Wallis test was used to evaluate any difference between AEI on both left and right sides in the three groups. No statistically significant difference was observed on either the right side (p = 0.174) or the left side (p = 0.624). (4) Articular eminence inclination seems to be not related with skeletal class. Given the lack of significance in the observed differences between AEI and skeletal classes, we believe that future studies should focus on assessing possible relationships between AEI and different vertical skeletal patterns.

scholarly journals Cone-beam computed tomography evaluation of bifid mandibular canal in a Turkish population

2018 ◽  
Vol 8 (2) ◽  
pp. 78-83 ◽  
Author(s):  
Nihat Laçin ◽  
Emre Aytuğar ◽  
İlknur Veli
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Turkish Population ◽  
Mandibular Canal ◽  
Cone Beam ◽  
Chi Square ◽  
Bifid Mandibular Canal ◽  
Chi Square Test ◽  
Male Patients ◽  
The Right

Aim: The aim of the study was to examine the prevalence of bifid mandibular canals (BMC) in a Turkish population, using cone-beam computed tomography (CBCT). Methodology: The CBCT images of 350 untreated patients (178 male, 172 female ranging in age between 18 and 65,) were included in this study. The presence or absence of BMC was determined in axial, sagittal, and coronal planes by considering gender and side. For statistical evaluation, a chi‑square test was used to determine any differences in the prevalence of BMC with significance set at 5%. Results: BMCs were observed in 129 out of 700 sides (18.42%) and 97 out of 350 patients (27.71%), of which, 55 were in males and 42 in females. Regardless of gender, the right side was more frequently affected (73%). Male patients showed higher prevalence (15.71%) than the female patients (12%). Conclusion: BMC was observed in 27.71% of examined Turkish subjects and detected more frequently in males and on the right side.

scholarly journals Decreased Functional Connectivity of the Primary Visual Cortex and the Correlation With Clinical Features in Patients With Intermittent Exotropia

2021 ◽  
Vol 12 ◽  
Author(s):  
Xueying He ◽  
Jie Hong ◽  
Zhaohui Liu ◽  
Qian Wang ◽  
Ting Li ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Clinical Features ◽  
Pearson Correlation ◽  
Brain Regions ◽  
Neural Mechanisms ◽  
Supramarginal Gyrus ◽  
Intermittent Exotropia ◽  
Postcentral Gyrus ◽  
Pearson Correlation Analysis ◽  
The Right

The purpose of this study is to investigate characteristic alterations of functional connectivity (FC) patterns in the primary visual area (V1) in patients with intermittent exotropia (IXT) using resting-state functional magnetic resonance imaging (rs-fMRI) and how they relate to clinical features. Twenty-six IXT patients and 21 age-, sex-, handedness-, and education-matched healthy controls (HCs) underwent rs-fMRI. We performed FC analyses between bilateral V1 and other brain areas and compared FC strength between two groups. A Pearson correlation analysis was used to evaluate the correlation between the FC differences and clinical features. Compared with HCs, patients with IXT showed significantly lower FC of the right V1 with the right calcarine sulcus and right superior occipital gyrus, and the left V1 with right cuneus and right postcentral gyrus. The Newcastle Control Test score was positively correlated with mean FC values between the left inferior parietal lobule and bilateral V1, and between the left supramarginal gyrus and left V1. The duration of IXT was positively correlated with mean FC values between the right inferior occipital gyrus and right V1. Reduced FC between the V1 and various brain regions involved in vision and eye movement processes may be associated with the underlying neural mechanisms of impaired visual function in patients with IXT.

scholarly journals Three-dimensional Analysis of Mandible Ramus Morphology and Transverse Stability After Intraoral Vertical Ramus Osteotomy

2021 ◽  
Author(s):  
Luo Huang ◽  
Shan Tang ◽  
Jing Yan ◽  
Yaoran Liu ◽  
ZhengGuo Piao
Keyword(s):  
Three Dimensional ◽  
Reference Points ◽  
Class Iii ◽  
Mandibular Ramus ◽  
Skeletal Class ◽  
Computed Tomography Images ◽  
Postoperative Changes ◽  
Transverse Stability ◽  
Intraoral Vertical Ramus Osteotomy ◽  
Vertical Ramus Osteotomy

Abstract Objectives: The purpose of this study was to investigate short- and long-term postoperative changes of both morphology and transverse stability in mandibular ramus after intraoral vertical ramus osteotomy (IVRO) in patients with jaw deformity using three-dimensional (3D) orthognathic surgery planning treatment software for measurement of distances and angles.Study Design: This retrospective study included consecutive patients with skeletal Class III malocclusion who had undergone intraoral vertical ramus osteotomy and computed tomography images before (T0), immediately after (T1), and one year after (T2) surgery. Reference points, reference lines and evaluation items were designated on the reconstructed 3D surface models to measure distances, angles and volume. The average values at T0, T1, T2 and time-dependent changes in variables were obtained.Results: After surgery, the condylar length, ramal height, mandibular body length and mandibular ramus volume were significantly decreased (P < .01), while clinically insignificant change was observed from T1 to T2. The angular length was increased immediately after surgery (P < .05), but it was decreased 1 year after surgery (P < .05). Lateral ramal inclination showed significant increase after surgery (P < .05) and maintained at T2.Conclusion: Changes in the morphology of the mandibular ramus caused by IVRO do not obviously bring negative effect on facial appearance. Furthermore, despite position and angle of mandibular ramus changed after IVRO, good transverse stability was observed postoperatively. Therefore, IVRO technique can be safely used without compromising esthetic results.

scholarly journals Analysis on external competency assessment for malaria microscopists in China

2019 ◽  
Vol 18 (1) ◽  
Author(s):  
Mei Li ◽  
Hejun Zhou ◽  
He Yan ◽  
Jianhai Yin ◽  
Xinyu Feng ◽  
...  
Keyword(s):  
Species Identification ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
World Health ◽  
Competency Assessment ◽  
Strongly Correlated ◽  
P Values ◽  
Health Organization ◽  
The Right ◽  
Post Hoc

Abstract Background In order to meet the requirement of malaria elimination (ME), three courses of the External Competency Assessment of Malaria Microscopists (ECAMM) were conducted during 2017–2018 in China by facilitators designated by the World Health Organization (WHO-ECAMM). A training course with a model copied from the WHO-ECAMM course was also held a week ahead of ECAMM in March 2018. Thirty-six participants completed these courses and obtained different results. Methods The slide structures, agendas, score calculations, and the levels of certifications of the four courses strictly adhered to the WHO guidelines. All the data were collected in Excel 2016 and analysed in Graphpad Prism5 or SPSS 23. Significant differences were evaluated in Graphpad Prism5 by two-tailed paired t tests between the pre-assessment and final-assessment for each of the four courses, as well as one-way ANOVAs with Kruskal–Wallis tests and Dunn’s post hoc tests among the final assessments of the four courses. Correlations between participants’ competency results and their ages, years working on malaria, and numbers of malaria cases reported in their provinces were evaluated by bivariate correlations (two-tailed) and linear regression (excluding cases pairwise) in SPSS 23. The Pearson correlation coefficients (r values), P values (two tailed), adjusted R square (Adjusted R2), standardized coefficients (β) and Sig. P values were recorded. The percentages of participants who gave the right answer to each slide (PPS) in the final assessments of the three WHO-ECAMM courses were calculated. Correlation analysis between PPS and parasitaemia (100–2000 parasites/μL) of Plasmodium falciparum slides used in species identification and parasite counting, were also evaluated via bivariate correlations (two-tailed) tests. Results Among the 36 participants, 16 participants were certificated as Level 1 (two from NRL), 10 were certified as Level 2 (one from NRL). Within the same course, participants had improved their average scores from pre-assessments to final assessments. The numbers of malaria cases reported in participants’ provinces were strongly correlated to their species identification (SI) scores; r = 0.45, P = 0.040, n = 21; r = 0.57, P = 0.001, n = 32; r = 0.56, P = 0.007). The parasitaemia of P. falciparum within 100–2000 parasites/μL was correlated significantly (r = 0.44, P = 0.008, n = 36) with the PPS of all counting slides but not with slides for identification (r = − 0.018, P = 0.93, n = 30). Conclusions The analysis and comparison of participants’ competency results not only verified that the model of the WHO-ECAMM course had strong power in improving and assessing microscopists’ competencies but also reflected the correlation between decreased numbers of indigenous malaria cases and microscopists’ competencies in certain areas in China.

scholarly journals Class III malocclusion with maxillary deficiency, mandibular prognathism and facial asymmetry

2016 ◽  
Vol 21 (5) ◽  
pp. 103-113 ◽  
Author(s):  
Guilherme de Araújo Almeida ◽  
Keyword(s):  
Facial Asymmetry ◽  
Class Iii ◽  
Class Iii Malocclusion ◽  
Mandibular Ramus ◽  
Surgical Interventions ◽  
History Of ◽  
Maxillary Constriction ◽  
The Right ◽  
Dentofacial Orthopedics ◽  
Maxillary Deficiency

ABSTRACT This article reports the clinical case of a female patient with history of unsuccessful orthodontic treatment. She presented with Class III malocclusion, mandibular and maxillary constriction, anterior crossbite and facial asymmetry resulting from laterognathism triggered by hyperactivity of the condyle revealed by vertical elongation of the right mandibular ramus. Patient's treatment consisted of orthodontic mechanics and two orthognathic surgical interventions with satisfactory and stable outcomes. This case was presented to the Brazilian Board of Orthodontics and Dentofacial Orthopedics (BBO), as part of the requirements for obtaining the BBO Diplomate title.

The Importance of Religious/Ritual Abuse as a Traumatic Predictor of Dissociation

2017 ◽  
Vol 33 (23) ◽  
pp. 3575-3588 ◽  
Author(s):  
Habib Niyaraq Nobakht ◽  
Karl Yngvar Dale
Keyword(s):  
Pearson Correlation ◽  
Strongly Correlated ◽  
Ritual Abuse ◽  
Trauma History ◽  
Religious Ritual ◽  
Item Questionnaire ◽  
Different Types ◽  
History Of ◽  
Pearson Correlation Analysis ◽  
The Relationship

This study aimed to ascertain the prevalence of different types of Religious/Ritual Abuse (RA) among Iranian young adults and to investigate the relationships between RA, childhood and recent trauma, and different patterns of dissociativity. A total of 100 male and 100 female university students completed and returned a 51-item questionnaire designed to detect the extent of dissociation, childhood and recent trauma history, and RA; 12.5% of participants reported history of RA. Pearson correlation analysis showed that RA strongly correlated with dissociativity. The most notable finding of this study is that RA and being victim of violence within the last 3 years are the most important traumatic predictors of dissociativity. More research on the nature of the relationship between RA and dissociation is suggested.

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