scholarly journals Three-Dimensional Determination of the Fusion Zone between the Distal Maxilla and the Pterygoid Plate of the Sphenoid Bone and Considerations for Implant Treatment Procedure

2020 ◽  
Vol 11 (1) ◽  
pp. 30
Author(s):  
Stefan Ihde ◽  
Łukasz Pałka ◽  
Sławomir Jarząb ◽  
Maciej Janeczek ◽  
Karolina Goździewska-Harłajczuk ◽  
...  
Keyword(s):  
Fusion Zone ◽  
Three Dimensional ◽  
Sphenoid Bone ◽  
Female Group ◽  
Pterygoid Process ◽  
Significant Difference ◽  
Pterygoid Plate ◽  
The Right ◽  
Model Visualization

During pre-operation planning, an implantologist has to decide about the location of a dental implant based on the available bone, anatomical structures and future prosthetics. The aim of this study was to provide an overview of the configurations of the junction zone of the pterygoid process, maxillary tuberosity and pyramidal process among the population and to determine the usefulness of 3D model visualization in regard to precision of anatomical structure projections for clinical planning. A total of 72 cases were analyzed for seven measurements (lateral, medial, rostral, caudal, area, line-1 longitudinal, line-2 transverse) on both body sides—right (R) and left (L). In 57 cases, age and sex of the patient were given. In 15 cases this information was missing. Among the group of 57 cases with complete data, there were 30 females (F) and 27 males (M). A total of 57 models of upper jaws including the adjacent pterygoid process of the sphenoid bone were taken for investigation. The results of the comparison between the right and left side showed no differences (p > 0.05) in values of the measured parameters. The results of the comparison between males and females showed a statistically significant difference when assessing the line-2 transverse (p < 0.05)—in the male group the average was 8.22 mm, in the female group the average was lower (7.83 mm). No statistically significant differences in values of the measured parameters for females and males were found for the left side nor for the right side. In all examined specimens there was enough bone surface in the fusion zone to allow for the stable placement of one tuberopterygoid implant.

The effect of ocular dominance on macular function: A pattern electroretinogram study

2020 ◽  
pp. 112067212098316
Author(s):  
Hilal Kılınç Hekimsoy ◽  
Mehmet Ali Sekeroglu
Keyword(s):  
Ocular Dominance ◽  
Pattern Electroretinogram ◽  
Cross Sectional Study ◽  
Implicit Time ◽  
Ophthalmological Examination ◽  
Macular Function ◽  
Cross Sectional ◽  
Significant Difference ◽  
The Right

Purpose: To investigate the effect of ocular dominance on pattern electroretinogram (PERG) recordings in the participants who have no ophthalmic diseases. Methods: One hundred and twelve eyes of 56 participants (mean age 32.96 ± 10.82 years) were included in this prospective, cross-sectional study. After detailed ophthalmological examination and determination of the ocular dominance with hole-in-a-card test, the PERG was performed to determine implicit time and amplitudes of P50 and N95. Results: There were no significant interocular differences in visual acuity, refractive error, or intraocular pressure ( p > 0.05 for all). Thirty-six (64.3%) of the participants had ocular dominance in the right eye. The dominant eyes had significantly higher P50 amplitude than in the fellow nondominant eyes (6.90 µV in dominant vs 5.87 µV in nondominant; p = 0.015; 95% confidence interval). There was no significant difference in N95 amplitude, N95/P50 ratio, and implicit times of P50 and N95 between the dominant and nondominant eyes of the participants ( p = 0.090, p = 0.124 p = 0.817, p = 0.668; respectively). Conclusion: The analysis revealed a significantly increased P50 amplitude of the PERG, which is known to be highly associated with macular function, in dominant eyes of the patients when compared to fellow nondominant eyes.

scholarly journals Plicae Palmatae on MR in Uterus Didelphys: the Incidence and Morphological Characteristics

2021 ◽  
Vol 2 (6) ◽  
pp. 01-03
Author(s):  
Wang Xiaoying
Keyword(s):  
Three Dimensional ◽  
Morphological Characteristics ◽  
Reproductive Age ◽  
Mr Images ◽  
Uterus Didelphys ◽  
Significant Difference ◽  
Cervical Disease ◽  
Left And Right ◽  
The Right ◽  
Plicae Palmatae

Objective: To investigate the incidence of plicae palmatae in uterus didelphys and its morphological characteristics on MR imaging. Methods: We retrospectively collected 37 consecutive female pelvic MR images diagnosed with uterus didelphys between August 2012 and November 2020. Patients with the following conditions were excluded: (a) repeated examination; (b) poor image quality; (c) cervical disease. Axial and coronal T2-weight images and axial three-dimensional (3D) volumetric isotropic T2-weighted acquisition (VISTA) were used to evaluate the ridge of plicae palmatae (RPP). A multiplanar reformation of the cervical axis from 3D-VISTA sequence was performed to measure the height and width of RPP. Non-normal variables based on the Kruskal-Wallis H test was used for statistical analysis. A two-tailed test where P < 0.05 was considered statistically significant. Results: Twenty-six cases were finally included in the statistics. The average age was 25.7±9.0 years (range, 10-45 years). RPP was observed on both cervices in 16 patients (61.5%), only on the left cervix in 3 patients (11.5%), and only on the right cervix in 4 patients (15.4%). There were 3 cases with no RPP observed in any of their cervix (11.5%).All RPP appear symmetrically on the anterior and posterior walls of the cervix. There was no statistically significant difference in height, width, and height/width of the RPP in the left and right cervix (p＞0.05). Conclusions: RPP is encountered in 88.5% patients with duplicated uterine cervices in our cohort. This incidence is similar to that reported in women with normal uterus of reproductive age.

scholarly journals Mandibular Canine Index: A Reliable Sex Determinant –Original Research

2018 ◽  
Author(s):  
Nikita Rathi ◽  
shweta bhat ◽  
Rajiv Desai
Keyword(s):  
Sex Determination ◽  
Forensic Odontology ◽  
Original Research ◽  
City Population ◽  
Significant Difference ◽  
Mandibular Canine ◽  
The Right ◽  
Mumbai City

Introduction: Forensic odontology is a unique discipline dealing with evidence related to dental and oral structures. Mandibular canines are considered to be an important aid for sex determination. The aim of this study was to analyse the role of mandibular canine index in sex determination of Mumbai city population. Materials and Methodology: This was a retrospective study done on the study models of 50 patients aged between 17 to 25 years old and equally distributed among both the sexes, whose treatment has been taken place in The Department of Orthodontics, Nair Hospital Dental College, Mumbai. Mesio-distal width of mandibular canines were measured using a digital Vernier calliper and mandibular canine index was calculated using standardized equation. Independent sample t-test was used and P < 0.05 was considered statistically significant. Results: There was a significant difference (P < 0.05) observed between right and left mandibular canine width and a significant difference between the right and left mandibular canine index between males and females. Conclusion: The present study verifies the fact that mandibular canine index can be used for sex determination in the population of Mumbai city and can form basis for forensic investigations. Key-words: Canine index, Sex determination, Forensic odontology

scholarly journals Mismatch Negativity in Children: Reference Values

2018 ◽  
Vol 23 (02) ◽  
pp. 142-146 ◽  
Author(s):  
Dulce Azevedo Ferreira ◽  
Claudine Devicari Bueno ◽  
Sady Selaimen de Costa ◽  
Pricila Sleifer
Keyword(s):  
Mismatch Negativity ◽  
Auditory Evoked Potential ◽  
Female Group ◽  
Active Electrode ◽  
Auditory Thresholds ◽  
Significant Difference ◽  
Potential Evaluation ◽  
Left And Right ◽  
The Mean ◽  
The Right

Introduction The Mismatch Negativity (MMN) auditory evoked potential evaluation is a promising procedure to assess objectively the ability of auditory discrimination. Objective To characterize the latency and amplitude values of MMN in children with normal auditory thresholds and without auditory complaints. Methods Children between 5 and 11 years old participated in the present study. All participants underwent acoustic immittance measurements and tonal and vocal audiometry. The MMN was recorded with the MASBE ATC Plus system (Contronic, Pelotas, RS, Brazil). The electrodes were fixed in Fz (active electrode), Fpz (ground electrode) and in M2 and M1 (references electrodes). The intensity used was 80 dBHL, the frequent stimulus was 1,000 Hz and the rare stimulus was 2,000 Hz. The stimuli were presented in both ears separately. Results For the female group, the mean latencies and amplitude of MMN were 177.3 ms and 5.01 μV in the right ear (RE) and 182.4 ms and 5.39 μV in the left ear (LE). In the male group, the mean latencies were 194.4 ms in the RE and 183.6 ms in the LE, with an amplitude of 5.11 μV in the RE and 5.83 μV in the LE. There was no statistically significant difference between ears (p = 0.867 - latency and p = 0.178 - amplitude), age (p > 0.20) and the gender of the participants (p > 0.05). Conclusion Using the described protocol, the mean latency value of MMN was 184.0 ms for RE and 182.9 ms for LE, and the amplitude was 5.05 μV and 5.56 μV for the left and right ears, respective.

scholarly journals The Efficiency of Using Mirror Imaged Topography in Fellow Eyes Analyses of Pentacam HR Data

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2132
Author(s):  
Arwa Fathy ◽  
Bernardo T. Lopes ◽  
Renato Ambrósio ◽  
Richard Wu ◽  
Ahmed Abass
Keyword(s):  
Three Dimensional ◽  
Anterior Surface ◽  
Significant Difference ◽  
The Difference ◽  
The Right ◽  
Healthy Participants ◽  
Corneal Apex ◽  
Tomography Data ◽  
Research Analysis ◽  
Fellow Eyes

Purpose: To investigate the effectiveness of flipping left corneas topography and analysethem quantitively along with fellow right corneas based on the assumption that they are mirror images of each other. Methods: The study involved scanning both eyes of 177 healthy participants (aged 35.3 ± 15.8) and 75 keratoconic participants (aged 33.9 ± 17.8). Clinical tomography data were collected for both eyes using the Pentacam HR and processed by a fully automated custom-built MATLAB code. For every case, the right eye was used as a datum fixed surface while the left cornea was flipped around in the superior–inferior direction. In this position, the root-mean-squared difference (RMS) between the flipped left cornea and the right cornea was initially determined for both the anterior and posterior corneal surfaces. Next, the iterative closest point transformation algorithm was applied on the three-dimensional flipped cornea to allow the flipped left corneal anterior surface to translate and rotate, minimising the difference between it and the right corneal anterior surface. Then, the RMS differences were recalculated and compared. Results: A comparison of the dioptric powers showed a significant difference between the RMS of both the flipped left eyes and the right eyes in the healthy and the KC groups (p < 0.001). The RMS of the surfaces of the flipped left corneas and the right corneas was 0.6 ± 0.4 D among the healthy group and 4.1 ± 2.3 among the KC group. After transforming the flipped left corneas, the RMS was recorded as 0.5 ± 0.3 D and 2.4 ± 2 D among the healthy and KC groups, respectively. Conclusions: Although fellow eyes are highly related in their clinical parameters, they should be treated with care when one eye topography is flipped and processed with the other eye topography in an optic-related research analysis where translation might be needed. In KC, an asymmetric disease, it was observed that a portion of the asymmetry was due to a corneal apex shift interfering with the image acquisition. Therefore, transforming the flipped left eyes by rotation and translation results in a fairer comparison between the fellow KC corneas.

scholarly journals Digit Bones (Acropodium) of Gazella (Gazella subgutturosa); Three-Dimensional Modelling and Morphometry

2021 ◽  
Vol 41 (04) ◽  
pp. 481-486
Author(s):  
Ismail Demircioglu
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Male Adult ◽  
Three Dimensional Modeling ◽  
Surface Areas ◽  
Computed Tomography Images ◽  
Significant Difference ◽  
Three Dimensional Models ◽  
The Right ◽  
Gazella Subgutturosa

The present study was conducted to identify morphometric values and to reveal differences between sexes through three-dimensional modeling of digit bones (ossa phalanges) of gazella by using computed tomography images. A total of 14 (7 female, 7 male) adult gazella (Gazella subgutturosa) cadavers were used in the study. The images were extracted by scanning acropodium bones of gazella at 64-detector Multi Detector Computed Tomography (MDCT) in cross section thickness of 0.625mm. Using MIMICS 20.1 program, three-dimensional models of these images were prepared and morphometric measurements were taken. In GLpe and Bd measurements of Phalanx proximalis, a statistically significant difference was established between females and males in terms of the left forelimb internal, the right forelimb internal, the right forelimb external, and the right hindlimb external bones (P<0.05). There was a statistically significant difference between females and males in terms of volume of phalanx proximalis and surface area of the right forelimb internal phalanx proximalis (P<0.001). In GLpe measurements, a statistically significant difference was determined between females and males in terms of the left forelimb internal, the right forelimb internal, the right hindlimb internal, the left forelimb external, the right forelimb external, and the right hindlimb external phalanx media (P<0.05). A statistically significant difference was determined between females and males in terms of the data related to volume and surface areas of the left hindlimb internal the right hindlimb internal, the left hindlimb external, and the right hindlimb external phalanx distalis (P<0.05).

scholarly journals Differences between male and female mandibular length growth according to panoramic radiograph

2019 ◽  
Vol 1 (1) ◽  
pp. 43
Author(s):  
Azhari Azhari ◽  
Berty Pramatika ◽  
Lusi Epsilawati
Keyword(s):  
Design Method ◽  
Panoramic Radiograph ◽  
Female Group ◽  
Cross Sectional ◽  
Men And Women ◽  
Male And Female ◽  
Length Growth ◽  
Significant Difference ◽  
Cross Sectional Design ◽  
The Right

Evaluation of the mandible was used for age and sex determination in the forensic field and it established the treatment planning in dentistry. The present study aims to determine mandibular length growth on male and female group aged   9-25 years old using panoramic radiograph. The research was conducted using analytical cross-sectional design method. The subject of this research was 412 panoramic radioraphs of patients aged 9-25 years old. It involved a totalsamples of 207 males and 205 females. This research was conducted from May to October 2017 in RSGM Padjadjaran University Bandung to meassure the length and height of mandibula from the point in condyleus to mentone. The MannWhitney test results showed a significant difference in mandibular length between men and women and no significant difference between the right andleft mandibular length in men and women. There is a difference between male and female mandibular length growth, in which the increase of growth of mandibular length in female is earlier than that of male. Male mandibular length is greater than female.

scholarly journals Region-specific changes in phospholipid metabolism in chronic, medicated schizophrenia

2002 ◽  
Vol 180 (1) ◽  
pp. 39-44 ◽  
Author(s):  
J. Eric Jensen ◽  
Yousef M. Al-Semaan ◽  
Peter C. Williamson ◽  
Richard W. J. Neufeld ◽  
Ravi S. Menon ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Chronic Schizophrenia ◽  
Brain Regions ◽  
Phospholipid Metabolism ◽  
Anterior Cingulate ◽  
Membrane Phospholipid ◽  
Resonance Spectroscopy ◽  
Significant Difference ◽  
Prefrontal Region ◽  
The Right

BackgroundMembrane phospholipid abnormalities in people with schizophrenia, measured with 31P magnetic resonance spectroscopy (31P-MRS), have been previously reported in brain regions involved in this disorder.AimsIn this 4.0 Tesla 31P-MRS study of people with schizophrenia, membrane phospholipid metabolism was examined in brain regions previously inaccessible due to their small volumes.MethodThree-dimensional chemical-shift imaging (3D–CSI) examined 15 cc volumes in 12 brain regions in 11 people with chronic schizophrenia and 11 healthy control volunteers.ResultsGlycerophosphoethanolamine was decreased in the anterior cingulate, right prefrontal cortex and left thalamus, but increased in the left hippocampus and cerebellum in those with schizophrenia. Phosphoethanolamine and glycerophosphocholine were decreased in the right prefrontal region and phosphocholine was decreased in the anterior cingulate. No significant difference in membrane phospholipid levels existed between groups in the parieto-occipital and posterior cingulate regions.ConclusionsAltered membrane phospholipid metabolism was demonstrated in all regions implicated in schizophrenia.

scholarly journals Role of diffusion MR imaging (DWI) and three-dimensional ultrasound (3DUS) in the assessment of placental insufficiency in the gestational hypertension

2019 ◽  
Vol 50 (1) ◽  
Author(s):  
Sahar Mansour ◽  
Soha Hamed ◽  
Safia Sayed ◽  
Shreen Hosny
Keyword(s):  
High Risk ◽  
Gestational Hypertension ◽  
Power Doppler ◽  
Three Dimensional ◽  
Placental Insufficiency ◽  
Adc Value ◽  
Non Invasive ◽  
Significant Difference ◽  
The Right ◽  
And Control

Abstract Background DWI is a non-invasive MR modality that is not contrast-based. In the current study, we aimed to evaluate DWI in correlation with 3DUS in the detection of placental insufficiency in high-risk pregnancies complicated with hypertension. This prospective analysis included 80 pregnancies; 40 hypertensive and 40 controls, gestational age ranged from 22 to 34 weeks. All cases had undergone 3DUS aided by power Doppler scanning and DWI. There is no given contrast. Data were correlated to histopathology. Results Doppler US showed a significant relation between RI of the right uterine artery of cases and control (P = 0.014). There was also a positive correlation between the presence of the diastolic notch and RI value. The mean ADC value in the controls was 1.87 ± 0.26 mm2/s, while in hypertensive was 1.36 ± 0.09 mm2/s. In DWI images, there was a significant difference between patients with normal and those with abnormal placental signals (P value = 0.047). Also, there was a significant difference between the measurement of placental volume by MRI and US among cases and controls (P values ≤0.001 and 0.017, respectively). Conclusion Diffusion-weighted imaging can detect early subtle findings and signs of placental dysfunction more than detected with 3DUS, so it can add to the diagnostic accuracy of US in imaging of pregnancies at high risk of placental insufficiency.

scholarly journals Auditory Evoked Potential Mismatch Negativity in Normal-Hearing Adults

2016 ◽  
Vol 21 (03) ◽  
pp. 232-238 ◽  
Author(s):  
Laura Schwade ◽  
Dayane Didoné ◽  
Pricila Sleifer
Keyword(s):  
Mismatch Negativity ◽  
Statistical Difference ◽  
Normal Hearing ◽  
Auditory Evoked Potential ◽  
Female Group ◽  
Cross Sectional ◽  
Significant Statistical Difference ◽  
Left Handed ◽  
Significant Difference ◽  
The Right

Introduction Mismatch Negativity (MMN) corresponds to a response of the central auditory nervous system. Objective The objective of this study is to analyze MMN latencies and amplitudes in normal-hearing adults and compare the results between ears, gender and hand dominance. Methods This is a cross-sectional study. Forty subjects participated, 20 women and 20 men, aged 18 to 29 years and having normal auditory thresholds. A frequency of 1000Hz (standard stimuli) and 2000Hz (deviant stimuli) was used to evoked the MMN. Results Mean latencies in the right ear were 169.4ms and 175.3ms in the left ear, with mean amplitudes of 4.6µV in the right ear and 4.2µV in the left ear. There was no statistically significant difference between ears. The comparison of latencies between genders showed a statistically significant difference for the right ear, being higher in the men than in women. There was no significant statistical difference between ears for both right-handed and left-handed group. However, the results indicated that the latency of the right ear was significantly higher for the left handers than the right handers. We also found a significant result for the latency of the left ear, which was higher for the right handers. Conclusion It was possible to obtain references of values for the MMN. There are no differences in the MMN latencies and amplitudes between the ears. Regarding gender, the male group presented higher latencies in relation to the female group in the right ear. Some results indicate that there is a significant statistical difference of the MMN between right- and left-handed individuals.

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