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https://www.readbyqxmd.com/read/28294204/investigations-on-the-accuracy-of-3d-printed-drill-guides-for-dental-implantology
#1
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
#2
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...
March 5, 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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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)...
January 27, 2017: Folia Phoniatrica et Logopaedica
https://www.readbyqxmd.com/read/28111498/establishment-of-local-diagnostic-reference-levels-for-quality-control-in-intraoral-radiography
#12
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
https://www.readbyqxmd.com/read/28078781/a-novel-conversion-method-for-radiographic-guide-into-surgical-guide
#13
Yao-Te Peng, Chung-Chih Tseng, Yi-Chun Du, Yen-Nien Chen, Chih-Han Chang
BACKGROUND: The study proposed a novel method for converting a radiographic guide into a surgical guide and evaluated its accuracy. MATERIALS AND METHODS: Radiographic guide was reformed with the addition of index rods for geometric conversion method (GCM). Planning implants were projected on geometric projection planes, and the implant positions were measured. The radiographic guide was converted into surgical guide using a generic bench drill machine with GCM data...
January 11, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28074260/accuracy-and-reproducibility-of-measurements-on-plaster-models-and-digital-models-created-using-an-intraoral-scanner
#14
Leonardo Tavares Camardella, Hero Breuning, Oswaldo de Vasconcellos Vilella
AIM: The purpose of the present study was to evaluate the accuracy and reproducibility of measurements made on digital models created using an intraoral color scanner compared to measurements on dental plaster models. METHODS: This study included impressions of 28 volunteers. Alginate impressions were used to make plaster models, and each volunteers' dentition was scanned with a TRIOS Color intraoral scanner. Two examiners performed measurements on the plaster models using a digital caliper and measured the digital models using Ortho Analyzer software...
January 10, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28065704/alveolar-bone-level-changes-in-maxillary-expansion-treatments-assessed-through-cbct
#15
Vi Pham, Manuel O Lagravère
OBJECTIVES: Determine changes in alveolar bone levels during expansion treatments as assessed through cone-beam computer tomography (CBCT). METHODS: Sixty-one patients from Edmonton, Canada, with maxillary transverse deficiencies were split into three groups. One group was treated with a bone-anchored expander, another group was treated with a tooth-borne maxillary expander (Hyrax) and one group was untreated. CBCTs were obtained from each patient at two time points (initialT1 and at removal of appliance after 6 months T2)...
March 2017: International Orthodontics
https://www.readbyqxmd.com/read/28049672/exploring-how-u-s-dental-schools-teach-removal-of-carious-tissues-during-cavity-preparations
#16
Marcelle M Nascimento, Linda S Behar-Horenstein, Xiaoying Feng, Sandra Guzmán-Armstrong, Margherita Fontana
Approaches for managing carious tissues during cavity preparations vary considerably among clinicians, which may reflect inconsistencies in the teaching of this subject by dental schools. The aims of this study were to investigate practices related to the preclinical and clinical teaching of caries removal at U.S. dental schools and the relationship between that teaching and requirements for U.S. dental licensure examinations. The electronic survey included questions about terminology, methods, instruments and materials, treatment planning, criteria for clinical exams, faculty calibration sessions, and licensure exams...
January 2017: Journal of Dental Education
https://www.readbyqxmd.com/read/28046473/su-c-206-03-metal-artifact-reduction-in-x-ray-computed-tomography-based-on-local-anatomical-similarity
#17
X Dong, X Yang, J Rosenfield, E Elder, A Dhabaan
PURPOSE: Metal implants such as orthopedic hardware and dental fillings cause severe bright and dark streaking in reconstructed CT images. These artifacts decrease image contrast and degrade HU accuracy, leading to inaccuracies in target delineation and dose calculation. Additionally, such artifacts negatively impact patient set-up in image guided radiation therapy (IGRT). In this work, we propose a novel method for metal artifact reduction which utilizes the anatomical similarity between neighboring CT slices...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28032048/radiographic-technical-quality-of-root-canal-treatment-performed-by-undergraduate-dental-students-at-the-academy-dental-teaching-hospital-umst-sudan
#18
Elhadi M Awooda, Reem I Siddig, Ruaa S Alturki, Nada M Sanhouri
AIM: To radiographically evaluate the technical quality of root canal treatment performed by undergraduate dental students and compare the findings with other institution's work. MATERIALS AND METHODS: A retrospective, cross-sectional study was conducted at the Academy Dental Teaching Hospital involving postoperative periapical radiographs of patients who were endodontically treated by batch #14 undergraduate dental students of final year (2013-2014) from UMST, Sudan...
November 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28029496/accuracy-of-the-estimation-of-dental-age-in-comparison-with-chronological-age-in-a-spanish-sample-of-2641-living-subjects-using-the-demirjian-and-nolla-methods
#19
María Melo, Javier Ata-Ali
Age estimation is an important procedure in forensic medicine and is carried out for a number of reasons. For living persons, age estimation is performed in order to assess whether a child has attained the age of criminal responsibility, in scenarios involving rape, kidnapping or marriage, in premature births, adoption procedures, illegal immigration, pediatric endocrine diseases and orthodontic malocclusion, as well as in circumstances in which the birth certificate is not available or the records are suspect...
October 12, 2016: Forensic Science International
https://www.readbyqxmd.com/read/28018985/northern-chinese-dental-ages-estimated-from-southern-chinese-reference-datasets-closely-correlate-with-chronological-age
#20
Hai Ming Wong, Yi Feng Wen, Jayakumar Jayaraman, Jing Li, Ling Sun, Nigel Martyn King, Graham J Roberts
While northern and southern Chinese are genetically correlated, there exists notable environmental differences in their living conditions. This study aimed to evaluate validity of the southern Chinese reference dataset for dental age estimation applied to northern Chinese. Dental panoramic tomographs of 437 northern Chinese aged 3 to 21 years were analysed. All the left maxillary and mandibular permanent teeth plus the 2 third molars on the right side were scored based on Demirjian's classification of tooth development stages...
December 2016: Heliyon
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