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https://www.readbyqxmd.com/read/28340178/morphometric-covariation-between-palatal-shape-and-skeletal-pattern-in-class-ii-growing-subjects
#1
Valeria Paoloni, Roberta Lione, Francesca Farisco, Demetrios J Halazonetis, Lorenzo Franchi, Paola Cozza
Objectives: To evaluate the patterns of covariation between palatal and craniofacial morphology in Class II subjects in the early mixed dentition by means of geometric morphometrics. Methods: A cross-sectional sample of 85 Class II subjects (44 females, 41 males; mean age 8.7 years ± 0.8) was collected retrospectively according to the following inclusion criteria: European ancestry (white), Class II skeletal relationship, Class II division 1 dental relationship, early mixed dentition, and prepubertal skeletal maturation...
March 14, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28337418/a-three-dimensional-photogrammetric-analysis-of-the-facial-esthetics-of-the-miss-korea-pageant-contestants
#2
Kab Soo Jang, Mohamed Bayome, Jae Hyun Park, Ki-Ho Park, Hong-Beom Moon, Yoon-Ah Kook
OBJECTIVE: The aims of this study were to measure and compare the facial dimensions of the Miss Korea pageant contestants and a selected group of women from the general population by using three-dimensional (3D) image analysis, as well as to compare various facial ratios to the golden ratio within each group. METHODS: Three-dimensional images of 52 Miss Korea pageant contestants (MK group) and 41 young female adults selected from the general population (GP group) were acquired...
March 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28336281/-optic-disc-changes-by-optical-coherence-tomography-in-optic-disc-edema-in-lom%C3%A3
#3
M A K Santos, K Vonor, D K Ayena, K R Kuaovi, K P Balo
OBJECTIVE: To study the influence of optic disc edema (ODE) on the dimensions of the disc and the thickness of the retinal nerve fiber layer (RNFL) by optical coherence tomography (OCT) in Lomé. PATIENTS AND METHODS: This was a retrospective study which took place in a general ophthalmology office in the city. Twenty-six eyes were examined for ODE (cases) between January 2013 and May 2015, and 26 healthy eyes (control group) were considered in this study. The control group was recruited taking age into account with a variation not exceeding 5 years compared to the ODE cases...
March 20, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28331595/context-dependent-functional-dispersion-across-similar-ranges-of-trait-space-covered-by-intertidal-rocky-shore-communities
#4
Nelson Valdivia, Viviana Segovia-Rivera, Eliseo Fica, César C Bonta, Moisés A Aguilera, Bernardo R Broitman
Functional diversity is intimately linked with community assembly processes, but its large-scale patterns of variation are often not well understood. Here, we investigated the spatiotemporal changes in multiple trait dimensions ("trait space") along vertical intertidal environmental stress gradients and across a landscape scale. We predicted that the range of the trait space covered by local assemblages (i.e., functional richness) and the dispersion in trait abundances (i.e., functional dispersion) should increase from high- to low-intertidal elevations, due to the decreasing influence of environmental filtering...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28322453/radio-anatomical-analysis-of-the-pericranial-flap-money-box-approach-for-ventral-skull-base-reconstruction
#5
Alfonso Santamaría, Cristóbal Langdon, Mauricio López-Chacon, Arturo Cordero, Joaquim Enseñat, Ricardo Carrau, Manuel Bernal-Sprekelsen, Isam Alobid
OBJECTIVES/HYPOTHESIS: To evaluate the versatility of the pericranial flap (PCF) to reconstruct the ventral skull base, using the frontal sinus as a gate for its passage into the sinonasal corridor "money box approach." STUDY DESIGN: Anatomic-radiological study and case series. METHODS: Various approaches and their respective defects (cribriform, transtuberculum, clival, and craniovertebral junction) were completed in 10 injected specimens...
March 21, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28321371/anatomic-variations-in-pituitary-endocrinopathies-implications-for-the-surgical-corridor
#6
Edward C Kuan, Frederick Yoo, Won Kim, Karam W Badran, Thomas E Heineman, Ali R Sepahdari, Marvin Bergsneider, Marilene B Wang
Objectives/Hypotheses Functioning pituitary adenomas may produce endocrinopathies such as acromegaly and Cushing syndrome. Both conditions lead to characteristic anatomic variations as a result of hormonally induced abnormal soft tissue deposition. We evaluate the anatomic differences between acromegalics and Cushing disease patients and compare these dimensions to controls. Design Radiographic review of preoperative magnetic resonance images (MRI) of the pituitary gland. Setting Tertiary academic medical center...
April 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28320847/multivoxel-pattern-analysis-reveals-3d-place-information-in-the-human-hippocampus
#7
Misun Kim, Kate J Jeffery, Eleanor A Maguire
The spatial world is three-dimensional (3D), and humans and other animals move both horizontally and vertically within it. Extant neuroscientific studies have typically investigated spatial navigation on a horizontal two-dimensional plane, leaving much unknown about how 3D spatial information is represented in the brain. Specifically, horizontal and vertical information may be encoded in the same or different neural structures with equal or unequal sensitivity. Here, we investigated these possibilities using functional MRI (fMRI) while participants were passively moved within a 3D lattice structure as if riding a rollercoaster...
March 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28303713/growth-of-single-crystalline-cadmium-iodide-nanoplates-cdi2-mos2-ws2-wse2-van-der-waals-heterostructures-and-patterned-arrays
#8
Ruoqi Ai, Xun Guan, Jia Li, Kangkang Yao, Peng Chen, Zhengwei Zhang, Xidong Duan, Xiangfeng Duan
Two-dimensional layered materials (2DLMs) have attracted considerable recent interest for their layer-number-dependent physical and chemical properties, as well as potential technological opportunities. Here we report the synthesis of two-dimensional layered cadmium iodide (CdI2) nanoplates using a vapor transport and deposition approach. Optical microscopy and scanning electron microscopy studies show that the resulting CdI2 nanoplates predominantly adopt hexagonal and triangular morphologies with a lateral dimension of ∼2-10 μm...
March 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28303642/efficacy-of-collagen-matrix-seal-and-collagen-sponge-on-ridge-preservation-in-combination-with-bone-allograft-a-randomized-controlled-clinical-trial
#9
Zuhair S Natto, Andreas Parashis, Bjorn Steffensen, Rumpa Ganguly, Matthew D Finkelman, Y Natalie Jeong
AIM: To test whether the use of collagen matrix seal (CMS) results in similar hard and soft tissue remodeling to that with collagen sponge (CS) used as barriers 4 months following alveolar ridge preservation (ARP), in combination with freeze-dried bone allograft (FDBA). MATERIALS AND METHODS: Twenty-eight patients were randomly assigned to the two groups. Clinical and radiographic measurements were recorded with the same stent at baseline and 4 months for standardization...
March 16, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28299262/success-rate-in-implant-supported-overdenture-and-implant-supported-fixed-denture-in-cleft-lip-and-palate-patients
#10
Jaine Zanolla, Flávio Monteiro Amado, Willian Saranholi da Silva, Bruno Ayub, Ana Lúcia Pompéia Fraga de Almeida, Simone Soares
BACKGROUND: The prosthetic treatment in cleft patients is challenging. Based on this, the aim of this study was to evaluate the longevity of prosthetic rehabilitation treatment with implant-supported overdenture (IOD) and implant-supported fixed denture (IFD) in cleft lip and palate patients in a period of 22 years. MATERIALS AND METHODS: The medical records of 72 patients were analyzed (29 males and 43 females), and the survival rate of the implants was evaluated...
July 2016: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28298985/computed-tomography-assessment-of-temporomandibular-joint-position-and-dimensions-in-patients-with-class-ii-division-1-and-division-2-malocclusions
#11
Hande Gorucu-Coskuner, Semra Ciger
BACKGROUND: This study aimed to investigate and compare the positions and dimensions of the temporomandibular joint and its components, respectively, in patients with Class II division 1 and division 2 malocclusions. MATERIAL AND METHODS: Computed tomography images of 14 patients with Class II division 1 and 14 patients with Class II division 2 malocclusion were included with a mean age of 11.4 ± 1.2 years. The following temporomandibular joint measurements were made with OsiriX medical imaging software program...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298819/diagnostic-accuracy-of-cone-beam-computed-tomography-in-identification-and-postoperative-evaluation-of-furcation-defects
#12
Natasha Pajnigara, Abhay Kolte, Rajashri Kolte, Nilufer Pajnigara, Vrushali Lathiya
BACKGROUND: Decision-making in periodontal therapeutics is critical and is influenced by accurate diagnosis of osseous defects, especially furcation involvement. Commonly used diagnostic methods such as clinical probing and conventional radiography have their own limitations. Hence, this study was planned to evaluate the dimensions of furcation defects clinically (pre- and post-surgery), intra-surgically, and by cone beam computed tomography (CBCT) (pre- and post-surgery). MATERIALS AND METHODS: The study comprised a total of 200 Grade II furcation defects in forty patients, with a mean age of 38...
July 2016: Journal of Indian Society of Periodontology
https://www.readbyqxmd.com/read/28297845/limits-of-size-scalability-of-diffusion-and-growth-atoms-versus-molecules-versus-colloids
#13
N Kleppmann, F Schreiber, S H L Klapp
Understanding fundamental growth processes is key to the control of nonequilibrium structure formation for a wide range of materials on all length scales, from atomic to molecular and even colloidal systems. While atomic systems are relatively well studied, molecular and colloidal growth are currently moving more into the focus. This poses the question to what extent growth laws are size scalable between different material systems. We study this question by analyzing the potential energy landscape and performing kinetic Monte Carlo simulations for three representative systems...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28294203/accuracy-and-reproducibility-of-four-cone-beam-computed-tomography-devices-using-3d-implant-planning-software
#14
Michael Stimmelmayr, Katharina Denk, Kurt Erdelt, Gerald Krennmair, Sonia Mansour, Florian Beuer, Jan-Frederik Güth
OBJECTIVE: To measure the deviations of four different cone beam computed tomography (CBCT) devices in three dimensions by means of a three-dimensional (3D) implant-planning program. MATERIALS AND METHODS: A master radiographic template with two vertical, two transverse, and two sagittal radiopaque markers was fabricated for a human dry skull. The lengths of the markers were measured with a high-precision caliper. The skull and the template were scanned in each of the four CBCT devices (1...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28287978/on-the-adaptation-of-pelvic-motion-by-applying-3-dimensional-guidance-forces-using-tpad
#15
Jiyeon Kang, Vineet Vashista, Sunil Agrawal
Pelvic movement is important to human locomotion as the center of mass is located near the center of pelvis. Lateral pelvic motion plays a crucial role to shift the center of mass on the stance leg while swinging the other leg and keeping the body balanced. In addition, vertical pelvic movement helps to reduce metabolic energy expenditure by exchanging potential and kinetic energy during the gait cycle. However, patient groups with cerebral palsy or stroke have excessive pelvic motion that leads to high energy expenditure...
March 8, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28286578/validity-of-the-microsoft-kinect-system-in-assessment-of-compensatory-stepping-behavior-during-standing-and-treadmill-walking
#16
Guy Shani, Amir Shapiro, Goldstein Oded, Kagan Dima, Itshak Melzer
BACKGROUND: Rapid compensatory stepping plays an important role in preventing falls when balance is lost; however, these responses cannot be accurately quantified in the clinic. The Microsoft Kinect™ system provides real-time anatomical landmark position data in three dimensions (3D), which may bridge this gap. METHODS: Compensatory stepping reactions were evoked in 8 young adults by a sudden platform horizontal motion on which the subject stood or walked on a treadmill...
2017: European Review of Aging and Physical Activity
https://www.readbyqxmd.com/read/28280582/validating-two-dimensional-leadership-models-on-three-dimensionally-structured-fish-schools
#17
Isobel Watts, Máté Nagy, Robert I Holbrook, Dora Biro, Theresa Burt de Perera
Identifying leader-follower interactions is crucial for understanding how a group decides where or when to move, and how this information is transferred between members. Although many animal groups have a three-dimensional structure, previous studies investigating leader-follower interactions have often ignored vertical information. This raises the question of whether commonly used two-dimensional leader-follower analyses can be used justifiably on groups that interact in three dimensions. To address this, we quantified the individual movements of banded tetra fish (Astyanax mexicanus) within shoals by computing the three-dimensional trajectories of all individuals using a stereo-camera technique...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28275802/-study-of-condyle-movement-in-angle-class-%C3%A2-malocclusion-with-temporomandibular-dysfunctions
#18
Zhong-Fu Chang, Jie Chen
PURPOSE: Subjects with normal occlusion, Angle Class Ⅲ malocclusion and Angle Class Ⅲ malocclusion with temporomandibular dysfunctions(TMD) were included, and their protraction and retraction, opening and closing mouth were recorded and compared to determine the condyle movement characteristics of Angle Class Ⅲ malocclusion patients with TMD. METHODS: Thirty cases of Angle Class Ⅲ malocclusion with TMD (experimental group), 30 cases of simple Angle Class Ⅲ malocclusion (control group 1) and 30 cases of normal occlusion (control group 2) were chosen, the condyle movement of mouth opening and closing, protraction and retraction were recorded and analyzed by computer aided axiography (CADIAX Ⅲ) , the measurements were compared and qualitative analysis was performed...
December 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28275526/quantifying-variability-in-longitudinal-peripapillary-rnfl-and-choroidal-layer-thickness-using-surface-based-registration-of-oct-images
#19
Sieun Lee, Morgan Heisler, Paul J Mackenzie, Marinko V Sarunic, Mirza Faisal Beg
PURPOSE: To assess within-subject variability of retinal nerve fiber layer (RNFL) and choroidal layer thickness in longitudinal repeat optical coherence tomography (OCT) images with point-to-point measurement comparison made using nonrigid surface registration. METHODS: Nine repeat peripapillary OCT images were acquired over 3 weeks from 12 eyes of 6 young, healthy subjects using a 1060-nm prototype swept-source device. The RNFL, choroid and the Bruch's membrane opening (BMO) were segmented, and point-wise layer thicknesses and BMO dimensions were measured...
February 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28272330/design-and-optimization-of-a-stationary-electrode-in-a-vertically-driven-mems-inertial-switch-for-extending-contact-duration
#20
Qiu Xu, Zhuo-Qing Yang, Bo Fu, Yan-Ping Bao, Hao Wu, Yun-Na Sun, Meng-Yuan Zhao, Jian Li, Gui-Fu Ding, Xiao-Lin Zhao
A novel micro-electro-mechanical systems (MEMS) inertial microswitch with a flexible contact-enhanced structure to extend the contact duration has been proposed in the present work. In order to investigate the stiffness k of the stationary electrodes, the stationary electrodes with different shapes, thickness h, width b, and length l were designed, analyzed, and simulated using ANSYS software. Both the analytical and the simulated results indicate that the stiffness k increases with thickness h and width b, while decreasing with an increase of length l, and it is related to the shape...
March 7, 2017: Sensors
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