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https://www.readbyqxmd.com/read/28425209/identification-of-dynamic-load-for-prosthetic-structures
#1
Dequan Zhang, Xu Han, Zhongpu Zhang, Jie Liu, Chao Jiang, Nobuhiro Yoda, Xianghua Meng, Qing Li
Dynamic load exists in numerous biomechanical systems and its identification signifies a critical issue for characterizing dynamic behaviors and studying biomechanical consequence of the systems. This study aims to identify dynamic load in the dental prosthetic structures, namely three-unit implant-supported fixed partial denture (I-FPD) and teeth-supported fixed partial denture (T-FPD). The three-dimensional (3D) finite element (FE) models were constructed through patient's computerized tomography (CT) images...
April 20, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28399461/measurement-of-open-apices-in-tooth-roots-in-colombian-children-as-a-tool-for-human-identification-in-asylum-and-criminal-proceedings
#2
REVIEW
Marcela Rivera, Stefano De Luca, Lina Aguilar, Luz Andrea Velandia Palacio, Ivan Galić, Roberto Cameriere
Dental age estimation was recognized as an imperative issue in clinical and medico-legal practice. However, very few studies on dental age estimation in children have been published in Colombia. This study evaluated the accuracy of Cameriere's method of measurement of open apices on tooth roots in a sample of 526 digital panoramic radiographs (OPTs) of children (274 boys and 252 girls), aged between 6 and 14 years, from Bogotá, Valle del Cauca, Buga and Villavicencio, in Southwest Colombia. Only first seven permanent lower teeth, except third molar, from the left side of mandible were studied...
April 6, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28390466/a-nomogram-for-calculation-of-maximum-recommended-dose-by-volume-of-local-anesthetic-in-pediatric-dentistry
#3
David Williams, Theodore Splaver, Jason Walker
PURPOSE: Calculation of maximum recommended doses for local anesthetic agents and added vasopressors is complex and error-prone with potentially fatal consequences. The purpose of this investigation was to develop a nomogram to calculate the maximum recommended doses, expressed as volumes (number of cartridges or ml) of local anesthetic for healthy U.S. pediatric dental patients based on body weight, and test its accuracy and reproducibility. METHODS: Standard mathematical techniques were used to draft the nomogram...
March 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28375424/dental-nonmetric-trait-intraobserver-precision-three-observations-of-a-large-sample
#4
Luís Miguel Marado
The utility of nonmetric dental traits in population phenetic studies is well documented. However, consistency in scoring trait expression is a concern due to the subjectivity in scoring quasicontinuous variables with graded scales. The aims of this study are to 1) analyze intraobserver results from an independent scorer and 2) interpret the least precise results. Six hundred individuals (300 of each sex) were scored for 48 dental nonmetric traits using ASUDAS, in one preliminary (100 individuals) and two full observations...
April 4, 2017: Anthropologischer Anzeiger; Bericht über die Biologisch-anthropologische Literatur
https://www.readbyqxmd.com/read/28371626/correlation-between-numbers-of-cells-in-human-dental-pulp-and-age-implications-for-age-estimation
#5
Mohammad Zakir Hossain, Sulinda Daud, Phrabhakaran Nambiar, Fathilah Abdul Razak, Norintan Ab-Murat, Roslan Saub, Marina M Bakri
OBJECTIVE: The aim of this study was to investigate correlations between dental pulp cell count of odontoblasts, subodontoblasts and fibroblasts and age, within different age groups. Formulation of regression equations using the dental pulp cell count for predicting age was attempted. DESIGN: Eighty-one extracted teeth were grouped into two age groups (6-25 years, 26-80 years). The teeth were demineralized and histological sections were prepared for cell count. Regression equations were generated from regression analysis of cell count and tested for age estimation...
March 24, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28371095/performance-of-dental-students-in-shade-matching-impact-of-training
#6
Adriana P Buhrer Samra, Marcella G Moro, Rui F Mazur, Sergio Vieira, Evelise M De Souza, Andrea Freire, Rodrigo N Rached
OBJECTIVE: The present study evaluated the effect of training on dental students' ability for matching two different shade guides. MATERIALS AND METHODS: The study was conducted in 2012. The participants were 88 male and female undergraduate dental students from Brazil and Portugal, with or without previous color education and vision refractive errors (response rate of 73.33%). They were asked to match a pair set of the shade guides Vita Classical (VC) and Vitapan 3D Master (3DM), with a 20-minutes' rest between each match...
April 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28366507/elaborative-feedback-in-clinical-dental-teaching-an-assessment-from-the-students-perspective
#7
C Olms, H A Jakstat, R Haak
INTRODUCTION: The aim of this prospective learning research study is to examine the impact of structured elaborative feedback in clinical dental skills teaching from the students' perspective. MATERIAL AND METHODS: A total of 60 dental students participated in the study. The mean average age was 23 years (20-40 years), of which 37 were female (61.7%) and 23 male (38.3%). The participants were randomly divided into a study and control group (n=30 each). The curriculum for clinical tooth-shade differentiation is a complete educational module...
March 31, 2017: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28327153/validation-and-reliability-of-the-malaysian-english-version-of-the-psychosocial-impact-of-dental-aesthetics-questionnaire-for-adolescents
#8
Wan Nurazreena Wan Hassan, Zamros Yuzadi Mohd Yusof, Mohd Zambri Mohamed Makhbul, Siti Safuraa Zahirah Shahidan, Siti Farhana Mohd Ali, Rashidah Burhanudin, Maria Jirom Gere
BACKGROUND: The Malay version of the Psychosocial Impact of Dental Aesthetics Questionnaire has been validated for use by Malaysian adolescents. Although Malay is their national language, English is widely used as the lingua franca among Malaysians of different ethnicities. This study aimed to validate an English version of the PIDAQ adapted for use by Malaysian adolescents to optimize data capture from adolescents who prefer English as the medium for communication. METHODS: The published English version of PIDAQ was pilot tested on 12- to 17-year-old adolescents, resulting in a few modifications to suit the Malaysian variety of English...
March 21, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28294204/investigations-on-the-accuracy-of-3d-printed-drill-guides-for-dental-implantology
#9
André Neumeister, Linda Schulz, Christoph Glodecki
This article describes the computer-aided design/computer-aided manufacture (CAD/CAM) accuracy of dental drill guides for application in guided surgery. Today, the availability of three-dimensional (3D) desktop printers allows for the cost-effective production of drill guides by dental laboratories. Our investigations show the accuracy of produced guides by eliminating influencing factors that exist in the guided surgery workflow. To investigate this accuracy, a method was developed to evaluate the CAD/CAM production technology apart from sources of error from cone beam computed tomography (CBCT) scans, intraoral scans, software or human error...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28274671/second-opinion-oral-pathology-referrals-in-new-zealand
#10
B Seo, H M Hussaini, A M Rich
Referral for a second opinion is an important aspect of pathology practice, which reduces the rate of diagnostic error and ensures consistency with diagnoses. The Oral Pathology Centre (OPC) is the only specialist oral diagnostic centre in New Zealand. OPC provides diagnostic services to dentists and dental specialists throughout New Zealand and acts as a referral centre for second opinions for oral pathology specimens that have been sent to anatomical pathologists. The aim of this study was to review second opinion referral cases sent to the OPC over a 15-year period and to assess the levels of concordance between the original and final diagnoses...
April 2017: Pathology
https://www.readbyqxmd.com/read/28257745/accuracy-and-head-positioning-effects-on-measurements-of-anterior-tooth-length-using-3-dimensional-and-conventional-dental-panoramic-radiography
#11
Noriyuki Kitai, Manabu Murabayashi, Hiroshi Sugimoto, Atsushi Fujiwara, Wakako Tome, Akitoshi Katsumata
INTRODUCTION: The purposes of this study were to examine the accuracy and the head positioning effects on measurements of anterior tooth length using 3-dimensional (3D) and conventional dental panoramic radiography and to investigate whether 3D panoramic radiography is suitable for the evaluation of anterior tooth length. METHODS: A simulated human head was radiographed at 4, 8, and 12 mm displaced positions, and at 5°, 10°, and 15° tilted positions from the standard head position using 3D and conventional panoramic radiography, and also using cone-beam computed tomography...
March 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28257608/research-and-primary-evaluation-of-an-automatic-fusion-method-for-multi-source-tooth-crown-data
#12
Ning Dai, Dawei Li, Xu Yang, Cheng Cheng, Yuchun Sun
BACKGROUND: With the development of 3D scanning technologies in dentistry, high accuracy optical scanning data from the crown and cone beam computed tomography (CBCT) data from the root can be acquired easily. In many dental fields, especially in digital orthodontics, it is useful to fuse the data from the crown and the root. However, the manual fusion method is complex and difficult. A novel automatic fusion method for two-source data from the crown and the root was researched and its accuracy was evaluated in this study...
March 3, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28215574/the-impact-of-pharmacy-services-on-opioid-prescribing-in-dental%C3%A2-practice
#13
Autumn Stewart, Kelsey J Zborovancik, Kara L Stiely
OBJECTIVES: To compare rates of dental opioid prescribing between periods of full and partial integration of pharmacy services and periods of no integration. METHODS: This observational study used a retrospective chart review of opioid prescriptions written by dental providers practicing in a free dental clinic for the medically underserved over a period of 74 months. Pharmacy services were fully integrated into the practice model for 48 of the 74 months under study...
February 15, 2017: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/28203004/-a-method-for-rapid-extracting-three-dimensional-root-model-of-vivo-tooth-from-cone-beam-computed-tomography-data-based-on-the-anatomical-characteristics-of-periodontal-ligament
#14
Y J Zhao, S W Wang, Y Liu, Y Wang
OBJECTIVE: To explore a new method for rapid extracting and rebuilding three-dimensional (3D) digital root model of vivo tooth from cone beam computed tomography (CBCT) data based on the anatomical characteristics of periodontal ligament, and to evaluate the extraction accuracy of the method. METHODS: In the study, 15 extracted teeth (11 with single root, 4 with double roots) were collected from oral clinic and 3D digital root models of each tooth were obtained by 3D dental scanner with a high accuracy 0...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28138165/aetiology-of-headache-in-clinical-ophthalmic-practice-at-a-tertiary-care-hospital-of-karachi
#15
Uzma Fasih, Arshad Shaikh, Nisar Shaikh
OBJECTIVE: To determine the aetiology of headache in patients seen for an ocular examination. METHODS: This cross-sectional, descriptive study was conducted at Ophthalmology Department of Karachi Medical and Dental College, Abbasi Shaheed Hospital, Karachi, from January to December 2014, and comprised patients with headache. Patients were registered through non-probability consecutive sampling technique. A predesigned proforma was used to collect data. Complete ocular examination and investigations were conducted along with neuro-ophthalmological examination...
February 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28127722/magnetic-resonance-imaging-distortion-and-targeting-errors-from-strong-rare-earth-metal-magnetic-dental-implant-requiring-revision
#16
Park Seong-Cheol, Lee Chong Sik, Kim Seok Min, Choi Eu Jene, Lee Do Hee, Lee Jung Kyo
Recently, the use of magnetic dental implants has been re-popularized with the introduction of strong rare earth metal, for example, neodymium, magnets. Unrecognized magnetic dental implants can cause critical magnetic resonance image distortions. We report a case involving surgical failure caused by a magnetic dental implant. A 62-year-old man underwent deep brain stimulation for medically insufficiently controlled Parkinson's disease. Stereotactic magnetic resonance imaging performed for the first deep brain stimulation showed that the overdenture was removed...
December 22, 2016: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28127327/accuracy-of-linear-measurements-using-cone-beam-computed-tomography-in-comparison-with-clinical-measurements
#17
Amir Reza Rokn, Kazem Hashemi, Solmaz Akbari, Mohammad Javad Kharazifard, Hamidreza Barikani, Mehrdad Panjnoosh
OBJECTIVES: This study sought to evaluate the accuracy and errors of linear measurements of mesiodistal dimensions of Kennedy Class III edentulous space using cone beam computed tomography (CBCT) in comparison with clinical measurements. MATERIALS AND METHODS: Nineteen Kennedy Class III dental arches were evaluated. An impression was made of each dental arch and poured with dental stone. The distance was measured on dental cast using a digital Vernier caliper with an accuracy of 0...
September 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28126000/validation-and-reliability-of-the-translated-malay-version-of-the-psychosocial-impact-of-dental-aesthetics-questionnaire-for-adolescents
#18
COMPARATIVE STUDY
Wan Nurazreena Wan Hassan, Zamros Yuzadi Mohd Yusof, Siti Safuraa Zahirah Shahidan, Siti Farhana Mohd Ali, Mohd Zambri Mohamed Makhbul
BACKGROUND: This paper describes the cross-cultural adaptation of the Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) into Malay version (Malay PIDAQ), an oral health-related quality of life (OHRQoL) instrument specific for orthodontics for Malaysian adolescents between 12 and 17 years old. METHODS: The PIDAQ was cross-culturally adapted into Malay version by forward- and backward-translation processes, followed by psychometric validations. After initial investigation of the conceptual suitability of the measure for the Malaysian population, the PIDAQ was translated into Malay, pilot tested and back translated into English...
January 26, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28125803/speech-characteristics-in-female-students-training-to-be-speech-language-pathologists
#19
Evelien D'haeseleer, Sophia De Ley, Marjan Cosyns, Els Desomer, Jasmien De Mesel, George Van Maele, Kristiane Van Lierde
OBJECTIVE: The purpose of this retrospective study was to determine the speech characteristics regarding speech intelligibility, voice, articulation, and fluency in future speech-language pathologists (SLPs). Additionally, in 31 SLP students the differences in speech characteristics between the first bachelor and the master year were measured. PARTICIPANTS AND METHODS: The data of the screening assessments of 600 future SLPs (mean age: 18.4 years) of the first bachelor year were analyzed (period 1995-2010)...
2016: Folia Phoniatrica et Logopaedica
https://www.readbyqxmd.com/read/28111498/establishment-of-local-diagnostic-reference-levels-for-quality-control-in-intraoral-radiography
#20
Maki Izawa, Yasuo Harata, Noriyoshi Shiba, Nobuhide Koizumi, Tomonori Ozawa, Nobutoshi Takahashi, Yasuhiko Okumura
OBJECTIVE: To investigate the dosage and imaging conditions for patients undergoing intraoral radiography at Meikai University Hospital and establish assurance and quality control data. METHODS: Tube voltage, exposure time, and air kinetic energy released per unit mass (air kerma) of three intraoral radiography units were measured. To calculate the patient entrance dose (PED) for each radiograph using Insight film, we extracted data for 1063 patients from their exposure records...
2017: Oral Radiology
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