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https://www.readbyqxmd.com/read/29996915/the-establishment-of-a-chemically-defined-serum-free-culture-system-for-human-dental-pulp-stem-cells
#1
Jingyi Xiao, Dawei Yang, Qiwen Li, Weidong Tian, Weihua Guo
BACKGROUND: The concept of establishing a dental stem cell (DSC) bank for oral and maxillofacial regeneration has become of great interest but it remains at a primitive stage. The routine application of serum-containing conditions for human DSC (hDSC) culture is in great controversy considering that the animal-originated serum can cause serious ethical concerns and lead to increasingly irrelevant variables, errors, and poor repeatability of experiment results. Thus, this study aimed to establish a safe, stable and efficient hDSC serum-free culturing system for future DSC bank usage...
July 11, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29994562/missing-surface-estimation-based-on-modified-tikhonov-regularization-application-for-destructed-dental-tissue
#2
Mojtaba Lashgari, Mahdi Shahmoradi, Hossein Rabbani, Michael Swain
Estimation of missing digital information is mostly addressed by one or two-dimensional signal processing methods; however, this problem can emerge in multi-dimensional data including 3D images. Examples of 3D images dealing with missing edge information are often found using dental micro-CT, where the natural contours of dental enamel and dentine are partially dissolved or lost by caries. In this paper, we present a novel sequential approach to estimate the missing surface of an object. First, an initial correct contour is determined interactively or automatically, for the starting slice...
January 31, 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/29988258/influence-of-experimental-staining-on-the-color-stability-of-indirect-computer-aided-design-computer-aided-manufacturing-dental-provisional-materials
#3
Thamer Almohareb, Mohammed S Alkatheeri, Fahim Vohra, Ali Alrahlah
Objective: This study presents a comparative analysis of the color stability of computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated provisional restorations with those of conventional restorations. Materials and Methods: Three different provisional restorative materials (Systemp C&B, 3M Protemp 4, and Telio CAD) were inspected for their color stability using four solutions (Pepsi, coffee, tea, and distilled water). All samples used were fabricated using A1 shade by following the manufacturer's instructions...
April 2018: European Journal of Dentistry
https://www.readbyqxmd.com/read/29977917/evaluation-of-the-accuracy-of-a-system-to-align-occlusal-dynamic-data-on-3d-digital-casts
#4
Iñigo de Prado, Mikel Iturrate, Rikardo Minguez, Eneko Solaberrieta
In recent years the T-Scan system has introduced the possibility of importing digitization of dental arches to its registrations. This is a remarkable advance, which allows an intuitive display of the location of the gathered dynamic data on the denture. Nevertheless, today's usual method of manually positioning the arch in relation to the T-Scan's force registration gives rise to the possibility of human error. In order to guarantee a good alignment between the dynamic registration and 3D digital casts, a specific method was developed...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29973186/manufacturing-of-an-immediate-removable-partial-denture-with-an-intraoral-scanner-and-cad-cam-technology-a-case-report
#5
Francois Virard, Laurent Venet, Raphaël Richert, Daniel Pfeffer, Gilbert Viguié, Alexandre Bienfait, Jean-Christophe Farges, Maxime Ducret
BACKGROUND: Incisor loss constitutes a strong aesthetic and psychologic traumatism for the patient and it remains a challenging situation for the dental practitioner because of the necessity to rapidly replace the lacking tooth. Various therapeutic procedures have been proposed to replace the incisor concerned, for example by using a removable partial denture. However, the manufacturing of such a denture with classical procedures is often subject to processing errors and inaccuracies...
July 4, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29967935/augmented-reality-surgical-navigation-with-accurate-cbct-patient-registration-for-dental-implant-placement
#6
Longfei Ma, Weipeng Jiang, Boyu Zhang, Xiaofeng Qu, Guochen Ning, Xinran Zhang, Hongen Liao
It is challenging to achieve high implant accuracy in dental implant placement, because high risk tissues need to be avoided. In this study, we present an augmented reality (AR) surgical navigation with an accurate cone beam computed tomography (CBCT)-patient registration method to provide clinically desired dental implant accuracy. A registration device is used for registration between preoperative data and patient outside the patient's mouth. After registration, the registration device is worn on the patient's teeth for tracking the patient...
July 2, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29962782/the-trojan-horse-of-a-dental-visit-synovial-sarcoma
#7
Neeharika Mortha, Sumit Majumdar, Divya Uppala, Sreekanth Kotina
The term "synovial sarcoma (SS)" is a histological error, a misnomer as it neither arises from nor differentiates toward synovium. Head and neck region is the most commonly affected region after extremities, representing 5% of all cases. This case report focuses to discuss a case of a SS that was diagnosed after an inadvertent root canal therapy. A 46-year-old male came to the outpatient department with a chief complaint of pain and swelling in his upper right back tooth region since 15 days. An ulceroproliferative mass of was observed protruding from the gingivobuccal sulcus from 11 to 15 tooth region obliterating the vestibule...
June 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29961541/the-prototype-concept-in-a-full-digital-implant-workflow
#8
Carlo Monaco, Lorenzo Scheda, Leonardo Ciocca, Giovanni Zucchelli
BACKGROUND: The aim of this case report is to describe the innovative concept of a prototype use in a digital implant workflow. A prototype is required for simultaneous evaluation of the accuracy of a dental impression and esthetic and functional parameters before final framework realization. CASE DESCRIPTION: Three digital impressions were obtained to create a master file, which contained information on the 3-dimensional (3D) position of the implant, the gingival architecture, and the esthetic and functional features of the provisional restoration...
June 28, 2018: Journal of the American Dental Association
https://www.readbyqxmd.com/read/29957513/a-comparative-study-to-investigate-the-effect-of-orthodontic-treatment-on-the-uniqueness-of-the-human-anterior-dentition
#9
Alice Elizabeth Catherine Dyke, Susan Cunningham, Nigel Hunt, Clifford Ruff
AIM: The human dentition contains many features which can be used to identify an individual from the dentition or from bite marks created and bite mark evidence may be used to link a suspect to a crime. The aim of this research was to investigate the effect of orthodontic treatment on the uniqueness of the human anterior dentition by comparison of the number of dental shape matches between pre- and post-treatment dental casts for a group of patients who have undergone orthodontic treatment (dental braces) to improve the alignment of their teeth...
June 26, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29947083/a-randomized-double-blind-placebo-controlled-phase-3-trial-evaluating-the-efficacy-of-burosumab-an-anti-fgf23-antibody-in-adults-with-x-linked-hypophosphatemia-week-24-primary-analysis
#10
Karl L Insogna, Karine Briot, Erik A Imel, Peter Kamenický, Mary D Ruppe, Anthony A Portale, Thomas Weber, Pisit Pitukcheewanont, Hae Il Cheong, Suzanne Jan de Beur, Yasuo Imanishi, Nobuaki Ito, Robin H Lachmann, Hiroyuki Tanaka, Farzana Perwad, Lin Zhang, Chao-Yin Chen, Christina Theodore-Oklota, Matt Mealiffe, Javier San Martin, Thomas O Carpenter
In X-linked hypophosphatemia (XLH), inherited loss-of-function mutations in the PHEX gene cause excess circulating levels of fibroblast growth factor 23 (FGF23), leading to lifelong renal phosphate wasting and hypophosphatemia. Adults with XLH present with chronic musculoskeletal pain and stiffness, short stature, lower limb deformities, fractures, and pseudofractures due to osteomalacia, accelerated osteoarthritis, dental abscesses, and enthesopathy. Burosumab, a fully human monoclonal antibody, binds and inhibits FGF23 to correct hypophosphatemia...
June 26, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29938686/compressed-sensing-based-ct-reconstruction-algorithm-combined-with-modified-canny-edge-detection
#11
Chia-Jui Hsieh, Ta-Ko Huang, Tung-Han Hsieh, Guo-Huei Chen, Kun-Long Shih, Zhan-Yu Chen, Jyh-Cheng Chen, Woei-Chyn Chu
Given that computed tomography (CT) reconstruction algorithm based on compressed sensing (CS) results in blurring edges, we propose a modified Canny operator that assists CS algorithm to accurately capture object's edge to preserve and further enhance their contrasts in the reconstructed image, thereby improving image quality. We modified two procedures of traditional Canny operator namely non-maximum suppression and edge tracking by hysteresis according to the characteristics of low-dose CT reconstruction, and proposed two major modifications: double-response edge detection and directional edge tracking...
June 25, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29929585/the-digital-patient-imaging-science-in-dentistry
#12
Bart Vandenberghe
Dental imaging has seen a rapid technological advance over the last several years. Not only has most x-ray based diagnostic technology been digitized, with the possibility of low dose 3D computed tomography imaging, but many novel optical imaging techniques have now also been adopted in a more therapeutic imaging of the dental patient. When combining and manipulating such different digital image data, clinicians can now easily plan and simulate treatments on-screen, use 3D printed models and aids to assist in accurate transfer of the virtual planning or even follow-up their treatments over time...
July 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29922344/prevalent-errors-in-writing-keywords-of-dental-articles
#13
Seyed Javad Ghazi-Mirsaeid, Fatemeh Masoudi
No abstract text is available yet for this article.
May 2018: Dental Research Journal
https://www.readbyqxmd.com/read/29898160/evaluation-of-the-prototype-of-a-new-bracket-positioning-gauge
#14
Sergio Luiz Mota Júnior, Marcio José da Silva Campos, Carina Abrantes Schmitberger, Juliana de Andrade Vitral, Marcelo Reis Fraga, Robert Willer Farinazzo Vitral
OBJECTIVE: The purposes of this study were to present a prototype of a bracket-positioning gauge, which makes vertical inclination of the instrument difficult, allowing a reduction of vertical bracket positioning error, and to test its accuracy in bracket positioning by groups of individuals with different clinical experience and in specific groups of teeth. METHODS: For the testing of the prototype, four groups of six participants each were used: Group 1 was composed of undergraduate students in the dental school, who had no previous experience in bonding orthodontic attachments; Group 2 was composed of orthodontic graduate students in the dental school; Group 3 consisted of orthodontists with a maximum of 5 years of clinical experience; Group 4 comprised orthodontists with more than 5 years of clinical experience...
March 2018: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29869589/generalized-causal-mediation-and-path-analysis-extensions-and-practical-considerations
#15
Jeffrey M Albert, Jang Ik Cho, Yiying Liu, Suchitra Nelson
Causal mediation analysis seeks to decompose the effect of a treatment or exposure among multiple possible paths and provide casually interpretable path-specific effect estimates. Recent advances have extended causal mediation analysis to situations with a sequence of mediators or multiple contemporaneous mediators. However, available methods still have limitations, and computational and other challenges remain. The present paper provides an extended causal mediation and path analysis methodology. The new method, implemented in the new R package, gmediation (described in a companion paper), accommodates both a sequence (two stages) of mediators and multiple mediators at each stage, and allows for multiple types of outcomes following generalized linear models...
January 1, 2018: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29864029/dental-age-estimation-in-children-with-chromosomal-syndromes
#16
V Pinchi, G Vitale, F Pradella, L Farese, M Focardi
When the age of an individual is unknown, age assessment refers to the procedures through which authorities try to establish the chronological age of an individual. Dental evidence demonstrated to be very effective in estimating age and dental mineralization is largely deemed a process scarcely influenced by major diseases and nutritional or environmental factors which can affect child growth. This research aims to understand the possible influence of genetic syndromes on dental maturation of affected individuals...
May 30, 2018: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/29864025/the-applicability-of-the-original-and-revised-demirjian-standards-to-age-estimations-of-5-15-year-old-indian-children
#17
S Hegde, A Patodia, U Dixit
BACKGROUND: The Demirjian method has been the most widely tested method for the estimation of the dental age of children and adolescents. However, only three studies have compared Demirjian's original and revised seven-tooth methods, four-tooth method and alternate four-tooth method, none of them conducted on an Indian population. AIM: The present study aimed to compare the applicability of the original and revised seven-tooth and four-tooth and alternate four-tooth standards for age estimation of 1200 Indian children aged 5-15 years old...
May 30, 2018: Journal of Forensic Odonto-stomatology
https://www.readbyqxmd.com/read/29857985/accuracy-of-le-fort-i-osteotomy-in-bimaxillary-splint-based-orthognathic-surgery-focus-on-posterior-maxillary-movements
#18
D Govaerts, E Shaheen, R Coopman, A De Mol, Y Sun, C Politis
This retrospective study was performed to verify the accuracy of horizontal and vertical repositioning of the maxilla in bimaxillary osteotomy with a focus on posterior vertical displacement. Data from 39 orthognathic patients undergoing bimaxillary surgery including a one-piece Le Fort I osteotomy with pitch rotation and advancement at the University Hospitals of Leuven (Belgium), between January 2015 and April 2016, were included in the study. Preoperative and 1-week postoperative lateral cephalograms were digitized and imported into cephalometric software...
May 29, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29807976/a-comprehensive-review-on-the-errors-that-occur-during-ideal-teeth-arrangement-for-complete-denture-prosthesis
#19
S Sriram Balaji, Vinaya Bhat
AIM: The aim of this article is to present a comprehensive review and a classification system on the various errors that occur during the ideal arrangement of artificial teeth for complete denture prosthesis. MATERIALS AND METHODS: Assessment of various classification systems presented for errors in artificial tooth arrangement and identifying the lacunae in each system. RESULTS: A comprehensive review and a classification system on the various errors that occur during the ideal arrangement of artificial teeth for complete denture prosthesis have been presented...
May 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29806653/implant-supported-prosthesis-treatment-planning-aspects-of-kaunas-city-dentists-and-dental-specialists
#20
Henrikas Rusilas, Laura Jacinkevičiūtė, Jan Pavel Rokicki
OBJECTIVE: Rehabilitation of mastication using fixed or removable prosthesis on dental implants is a daily procedure in modern dentistry.The huge variety of diagnostic tools and methods, such as cone beam computed tomography or surgical guides help to avoid complications. A vast quantity of diagnostic tools and prosthesis require a tight communication between surgeons and prosthodontists in order to achieve better treatment plan. METHODS: The questionnaire was approved by LUHS Committee of Ethics...
2018: Stomatologija
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