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https://www.readbyqxmd.com/read/29332114/dental-arch-dimensions-form-and-tooth-size-ratio-among-a-saudi-sample
#1
Haidi Omar, Manar Alhajrasi, Nayef Felemban, Ali Hassan
To determine the dental arch dimensions and arch forms in a sample of Saudi orthodontic patients, to investigate the prevalence of Bolton anterior and overall tooth size discrepancies, and to compare the effect of gender on the measured parameters. Methods: This study is a biometric analysis of dental casts of 149 young adults recruited from different orthodontic centers in Jeddah, Saudi Arabia. The dental arch dimensions were measured. The measured parameters were arch length, arch width, Bolton's ratio, and arch form...
January 2018: Saudi Medical Journal
https://www.readbyqxmd.com/read/29324319/dental-age-estimation-employing-cbct-scans-enhanced-with-mimics-software-comparison-of-two-different-approaches-using-pulp-tooth-volumetric-analysis
#2
Muhammad Khan Asif, Phrabhakaran Nambiar, Shani Ann Mani, Norliza Binti Ibrahim, Iqra Muhammad Khan, Prema Sukumaran
The methods of dental age estimation and identification of unknown deceased individuals are evolving with the introduction of advanced innovative imaging technologies in forensic investigations. However, assessing small structures like root canal volumes can be challenging in spite of using highly advanced technology. The aim of the study was to investigate which amongst the two methods of volumetric analysis of maxillary central incisors displayed higher strength of correlation between chronological age and pulp/tooth volume ratio for Malaysian adults...
January 4, 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29321613/evaluation-of-in-vivo-digital-root-reconstruction-based-on-anatomical-characteristics-of-the-periodontal-ligament-using-cone-beam-computed-tomography
#3
Chenxin Wang, Yi Liu, Siwei Wang, Yong Wang, Yijiao Zhao
This study's aim was to develop and validate an approach to automatically extract and reconstruct three-dimensional (3D) digital root models from in vivo teeth based on the anatomical characteristics of the periodontal ligament using cone beam computed tomography (CBCT) data. Prior to undergoing dental extractions for orthodontic purposes, the CBCT data of each study participant were collected and imported into Mimics software to reconstruct 3D in vivo digital root models (test models). Twenty roots of 17 teeth extracted from the study's participants were scanned using a dental scanner to obtain 3D in vitro digital root models (reference models)...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317700/comparative-analysis-of-gene-expression-profiles-of-human-dental-fluorosis-and-kashin-beck-disease
#4
Qiang Zhang, Jing Ma, Haiqing Liu, Duolong He, Lilin Chen, Haikun Wu, Hong Jiang, Qing Lu, Shenglu Bai
To explore the pathologies of Kashin-Beck disease (KBD) and KBD accompanied with dental fluorosis (DF), we conducted a comparative analysis of gene expression profiles. 12 subjects were recruited, including 4 KBD patients, 4 patients with KBD and DF and 4 healthy subjects. Genome-wide expression profiles from their peripheral blood mononuclear cells were evaluated by customized oligonucleotide microarray. R programming software was used for the microarray data analysis followed by functional enrichment analysis through KOBAS...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29301562/technical-realization-of-a-sensorized-neonatal-intubation-skill-trainer-for-operators-retraining-and-a-pilot-study-for-its-validation
#5
Davide Panizza, Rosa T Scaramuzzo, Francesca Moscuzza, Ilaria Vannozzi, Massimiliano Ciantelli, Marzia Gentile, Ilaria Baldoli, Selene Tognarelli, Antonio Boldrini, Armando Cuttano
BACKGROUND: In neonatal endotracheal intubation, excessive pressure on soft tissues during laryngoscopy can determine permanent injury. Low-fidelity skill trainers do not give valid feedback about this issue. This study describes the technical realization and validation of an active neonatal intubation skill trainer providing objective feedback. METHODS: We studied expert health professionals' performances in neonatal intubation, underlining chance for procedure retraining...
January 4, 2018: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/29287156/evaluation-of-the-diagnostic-yield-of-dental-radiography-and-cone-beam-computed-tomography-for-the-identification-of-dental-disorders-in-small-to-medium-sized-brachycephalic-dogs
#6
Sophie Döring, Boaz Arzi, David C Hatcher, Philip H Kass, Frank J M Verstraete
OBJECTIVE To evaluate the diagnostic yield of dental radiography (Rad method) and cone-beam CT (CBCT) methods for the identification of 31 predefined dental disorders in brachycephalic dogs. ANIMALS 19 client-owned brachycephalic dogs admitted for evaluation and treatment of dental disease. PROCEDURES 31 predefined dental disorders were evaluated separately and scored by use of dental radiography and 3 CBCT software modules (serial CBCT slices and custom cross sections, tridimensional rendering, and reconstructed panoramic views)...
January 2018: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29287153/evaluation-of-the-diagnostic-yield-of-dental-radiography-and-cone-beam-computed-tomography-for-the-identification-of-anatomic-landmarks-in-small-to-medium-sized-brachycephalic-dogs
#7
Sophie Döring, Boaz Arzi, Catherine R Barich, David C Hatcher, Philip H Kass, Frank J M Verstraete
OBJECTIVE To evaluate the diagnostic yield of dental radiography (Rad method) and 3 cone-beam CT (CBCT) methods for the identification of predefined anatomic landmarks in brachycephalic dogs. ANIMALS 19 client-owned brachycephalic dogs admitted for evaluation and treatment of dental disease. PROCEDURES 26 predefined anatomic landmarks were evaluated separately by use of the RAD method and 3 CBCT software modules (serial CBCT slices and custom cross sections, tridimensional rendering, and reconstructed panoramic views)...
January 2018: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29285474/an-assessment-of-teaching-and-learning-practices-a-questionnaire-study-for-dental-educators-of-karnataka
#8
S Meenakshi, N Raghunath, H S Shreeshyla
Aims and Objectives: Faculty members of dental institutions are being asked to assume new academic duties for which they have received no formal training. To succeed in new teaching tasks, faculty development through assessment of teaching skills is essential. Materials and Methods: A Self-Assessment Questionnaire consisting 18 closed-ended questions was sent to various faculty members of dental colleges of Karnataka. A total of 210 faculty members volunteered to participate in the study...
November 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29284461/clinical-validation-and-assessment-of-a-modular-fluorescent-imaging-system-and-algorithm-for-rapid-detection-and-quantification-of-dental-plaque
#9
Keith Angelino, Pratik Shah, David A Edlund, Mrinal Mohit, Gregory Yauney
BACKGROUND: Significant numbers of adults and children have untreated plaque due to poor oral hygiene and consequently suffer from associate dental and systemic diseases. METHODS: A handheld device equipped with 405 nm light-emitting diodes was constructed to examine the prevalence of red fluorescence signatures associated with dental plaque. This device was used for in vivo imaging of all four incisors and all four canines of twenty-eight consenting human subjects...
December 28, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29280304/evaluating-the-association-of-tooth-form-of-maxillary-central-incisors-with-face-shape-using-autocad-software-a-descriptive-study
#10
Aditi Mehndiratta, Mahantesh Bembalagi, Raghunath Patil
PURPOSE: To assess the different forms of maxillary central incisors (MCI) and determine their association with the shape of the face for men and women. MATERIALS AND METHODS: A total of 200 subjects (100 women, 100 men) aged between 18 and 30 years with healthy dentition were randomly selected from K.L.E. V.K Institute of Dental Sciences, Belagavi, India. Two standardized photographs (portrait and shape of the MCI) were taken for each subject and opened in AutoCAD 2009 software that was used to prepare technical drawings of face and tooth forms...
December 27, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29279766/evaluation-of-marginal-and-internal-gap-of-three-unit-metal-framework-according-to-subtractive-manufacturing-and-additive-manufacturing-of-cad-cam-systems
#11
Dong-Yeon Kim, Eo-Bin Kim, Hae-Young Kim, Ji-Hwan Kim, Woong-Chul Kim
PURPOSE: To evaluate the fit of a three-unit metal framework of fixed dental prostheses made by subtractive and additive manufacturing. MATERIALS AND METHODS: One master model of metal was fabricated. Twenty silicone impressions were made on the master die, working die of 10 poured with Type 4 stone, and working die of 10 made of scannable stone. Ten three-unit wax frameworks were fabricated by wax-up from Type IV working die. Stereolithography files of 10 three-unit frameworks were obtained using a model scanner and three-dimensional design software on a scannable working die...
December 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29279683/evaluation-of-child-preference-for-dentist-attire-and-usage-of-camouflage-syringe-in-reduction-of-anxiety
#12
Prashant Babaji, Pavni P Chauhan, Vikram Rathod, Swapnil Mhatre, Uttam Paul, Guneet Guram
Objectives: The aim of this study is to evaluate the child preference for dentist attire and camouflage versus conventional syringe in reduction of anxiety. Materials and Methods: A total of 600 children aged 6-14 years were made to look at a set of six photos of an individual dressed with different colored apron of pink, green, blue, white colors, formal dress, and cartoon character along with conventional syringe and camouflage syringe with a toy-like appearance to permit injection of local anesthesia...
October 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/29279680/smile-esthetics-impact-of-variations-in-the-vertical-and-horizontal-dimensions-of-the-maxillary-lateral-incisors
#13
Amjad Al Taki, Ahmad Mohammad Hamdan, Ziad Mustafa, Mawada Hassan, Sami Abu-Alhuda
Objective: The purpose of this study was to determine the perception of trained dental professionals and laypersons toward the esthetic impact of variations in the vertical position, width, and gingival height of the maxillary lateral incisor. Materials and Methods: The present study analyzed the perspective of smile photographs by dental professionals such as "fifty orthodontics and fifty general dental practitioners (GDPs)" as well as fifty laypersons, consisting of an equal number of male and female participants...
October 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/29274951/correlation-between-the-posterior-mandibular-width-and-the-lingual-gap-caused-by-symphyseal-fractures-using-a-virtual-model
#14
Christian Pedemonte Trewhela, Andrea Carmona Avendaño, Edgardo González Mora, Ilich Vargas Farren, Francisco Lopetegui Caceres, Erick Rojas Quiroz
PURPOSE: The objective was to determine the dimensional impact, on the occlusal and articular level, of the gap produced in the lingual plate from symphyseal fractures, correlated with the dimensional change in the posterior mandibular width. MATERIALS AND METHODS: We performed an observational experimental study based on 30 computed tomography scans of patients treated by the Maxillofacial Surgery Service, Hospital Clínico Mutual de Seguridad, Santiago, Chile, between 2012 and 2016...
December 7, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29241643/a-3-dimensional-approach-for-analysis-in-orthognathic-surgery-using-free-software-for-voxel-based-alignment-and-semiautomatic-measurement
#15
Kasper Stokbro, Torben Thygesen
PURPOSE: In orthognathic surgery, the repeatability of 3-dimensional (3D) measurements is limited by the need for manual reidentification of reference points, which can incorporate errors greater than 1 mm for every 4 repeated measurements. This report describes a semiautomatic approach to decrease the manual reidentification error. This study evaluated the repeatability of surgical outcome measurements using the semiautomatic approach. Furthermore, a step-by-step guide is provided to enable researchers and clinicians to perform the 3D analysis by themselves...
November 22, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29238379/correlation-of-vitamin-d-status-and-orthodontic-induced-external-apical-root-resorption
#16
Azita Tehranchi, Azin Sadighnia, Farnaz Younessian, Amir H Abdi, Armin Shirvani
Background: Adequate Vitamin D is essential for dental and skeletal health in children and adult. The purpose of this study was to assess the correlation of serum Vitamin D level with external-induced apical root resorption (EARR) following fixed orthodontic treatment. Materials and Methods: In this cross-sectional study, the prevalence of Vitamin D deficiency (defined by25-hydroxyvitamin-D) was determined in 34 patients (23.5% male; age range 12-23 years; mean age 16...
November 2017: Dental Research Journal
https://www.readbyqxmd.com/read/29236870/accuracy-of-linear-measurements-performed-with-two-imaging-software-in-cone-beam-computed-tomography-scans-of-dry-human-mandibles
#17
Alessandro A L S Silva, Ademir Franco, Ângela Fernandes, Claudio Costa, Jorge S Barbosa, Fernando H Westphalen
The present study aimed to assess the accuracy of linear measurements performed with two software packages in multislice (MSCT) and cone beam (CBCT) computed tomography (CT) images. The sample consisted of 10 human mandibles marked standardly 8 times with metallic orthodontic wires. The mandibles underwent both MSCT and CBCT scanning and were measured linearly and digitally with two software packages, namely Studio 3.1® (Anne Solutions®, SP, Brazil) (ST) and Implant Viewer 2.817® (Anne Solutions®, SP, Brazil) (IV)...
December 7, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29235202/three-dimensional-static-articulation-accuracy-of-virtual-models-part-i-system-trueness-and-precision
#18
Sophia Hui Xin Yee, Roxanna Jean Esguerra, Amelia Anya Qin'An Chew, Keng Mun Wong, Keson Beng Choon Tan
PURPOSE: To evaluate the 3D static articulation accuracy of 3 model scanner-CAD systems (Ceramill Map400 [AG], inEos X5 [SIR], Scanner S600 Arti [ZKN]) using a coordinate measuring machine (CMM). Trueness and precision for each system will be reported in Part I. MATERIALS AND METHODS: The master model simulated a single crown opposing a 3-unit fixed dental prosthesis. Five mounted stone cast sets were prepared, and one set was randomly selected. Reference values were obtained by measuring interarch and interocclusal reference features with the CMM...
December 13, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29225924/ct-dental-artifact-comparison-of-an-iterative-metal-artifact-reduction-technique-with-weighted-filtered-back-projection
#19
Felix E Diehn, Gregory J Michalak, David R DeLone, Amy L Kotsenas, E Paul Lindell, Norbert G Campeau, Ahmed F Halaweish, Cynthia H McCollough, Joel G Fletcher
Background: Dental hardware produces streak artifacts on computed tomography (CT) images reconstructed with the standard weighted filtered back projection (wFBP) method. Purpose: To perform a preliminary evaluation of an iterative metal artifact reduction (IMAR) technique to assess its ability to improve anatomic visualization over wFBP in patients with dental amalgam or other hardware. Material and Methods: CT images from patients with dental hardware were reconstructed using wFBP and IMAR software and soft-tissue or bone window/level settings...
November 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29222966/optimizing-functional-outcomes-in-mandibular-condyle-reconstruction-with-the-free-fibula-flap-using-computer-aided-design-and-manufacturing-technology
#20
Z-Hye Lee, Tomer Avraham, Casian Monaco, Ashish A Patel, David L Hirsch, Jamie P Levine
PURPOSE: Mandibular defects involving the condyle represent a complex reconstructive challenge for restoring proper function of the temporomandibular joint (TMJ) because it requires precise bone graft alignment for full restoration of joint function. The use of computer-aided design and manufacturing (CAD/CAM) technology can aid in accurate reconstruction of mandibular condyle defects with a vascularized free fibula flap without the need for additional adjuncts. The purpose of this study was to analyze clinical and functional outcomes after reconstruction of mandibular condyle defects using only a free fibula graft with the help of virtual surgery techniques...
November 15, 2017: Journal of Oral and Maxillofacial Surgery
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