Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 11.288
Filtrar
2.
Photobiomodul Photomed Laser Surg ; 40(1): 42-50, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34939836

RESUMO

Background: Dosimetry at a level of 2-8 J/cm2 at target cellular level has been accepted to represent the optimum range for the stimulatory benefits associated with photobiomodulation therapies. However, it has been proposed that a higher bracket of 10-30 J/cm2 at target tissue level may represent a good and effective range for analgesia, accompanied by at-distance regional anti-inflammatory effects. However, although this provides a useful guideline, transforming recommendations into a translatable and repeatable clinical skill have to date proven elusive. Methods: Based on prior publications of systematic reviews by the authors, key factors have been identified, associated with reported clinical and in vitro and in vivo animal studies that can support outcome success or null responses. Drawn from five recently published systematic reviews, an analysis of an extended published evidence base indicates that research methodology should embrace a mature understanding of terminology, a requirement for consistent metered energy delivery, and an appreciation of optical transport techniques. Results: Using models derived from orthodontics and oncology, evidence-based optimal delivery parameters and techniques are presented. Within the confines of the accepted inclusion criteria, a modified Cochrane risk of bias tool has been applied and the parameters extracted from the included studies were subjected to a meta-analysis. This demonstrated a low risk of bias from the studies included with a multivariate and/or univariate statistical analysis that supports the author's evidence-based determinations. The adoption of a surface optical spot size of >1 cm2 demonstrated a high degree of success in managing both superficial as well as subsurface pathologies in oral care. Also, the timing of the intervention with conditioning before or at the same time as a potentially traumatic cellular event was found to be a significant signal of outcome success. An extended commentary explores the benefits and disadvantages of scanning techniques. Conclusions: The extracted clinical data are cross-referenced to the mechanisms suggested for photobiomodulation therapies from the authors' own current in vitro research, and proposals are made for some possible lines of approach in future research and clinical trials.


Assuntos
Analgesia , Terapia com Luz de Baixa Intensidade , Ortodontia , Revisões Sistemáticas como Assunto
3.
Dental Press J Orthod ; 26(6): e21spe6, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34932716

RESUMO

INTRODUCTION: The digital technology has contributed to improve and simplify diagnosis, treatment planning and execution in Orthodontics. Among CAD/CAM system (Computer-Aided Design / Computer-Aided Manufacturing) applications in Orthodontics, we highlight the installation and removal of fixed appliance, clear aligners, customized appliances, and retainers fabricated in digital environment. This approach has several advantages for practitioner and patient, as it enhances appliances precision, directly interferes in treatment time and predictability. Even with all the benefits arising from the digital workflow, few orthodontists have adopted this technique in their clinical practice, most due to high cost and lack of technical preparation for proper execution. OBJECTIVES: Thus, given the importance of digital technology to improve specialty performance and the still incipient incorporation of digital flow in Orthodontics, the purpose of this article is to describe the available resources and clinical applications of the CAD/CAM technology in Orthodontics.


Assuntos
Desenho Assistido por Computador , Ortodontia , Humanos , Ortodontistas , Planejamento de Assistência ao Paciente , Fluxo de Trabalho
4.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 56(12): 1277-1281, 2021 Dec 09.
Artigo em Chinês | MEDLINE | ID: mdl-34915665

RESUMO

With the increasing integration of artificial intelligence (AI) with other fields, machine learning, one of the major methods in AI, has been extensively applied in dentistry in the stage of diagnosis, therapy and prognosis evaluation. Nowadays, numerous studies have reported the applications of machine learning in orthodontics in two major aspects, including image identification and clinical decision support system. Herein, we reviewed the application progress of machine learning in orthodontics in order to provide new insight for the future precision medicine.


Assuntos
Ortodontia , Inteligência Artificial , Aprendizado de Máquina
5.
Prog Orthod ; 22(1): 47, 2021 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-34931274

RESUMO

OBJECTIVES: Understanding the issues concerning the conducting of virtual orthodontic learning sessions (VOLSs) is essential. This study aims to identify attendees- and host-related aspects that could optimise learning and uptake from the VOLSs. METHODOLOGY: Fourteen pre-validated questions were anonymously and electronically sent to 3000 orthodontic residents and specialists globally. The survey included demographic questions and questions to gauge attendees' engagement, memorising, and motivation-related factors. Reminders were sent at two-week intervals to non-respondents. The survey was closed when the sample size was met. Descriptive and inferential statistics were performed. RESULTS: 593 orthodontic residents and specialists (294 males and 299 females), primarily junior orthodontists and residents aged between 25 and 35 years of age, completed the survey. Post-VOLS recording was highly requested by the participants (8.84/10, 95% CI 8.67-9.00) with no significant influence of demographics on this trend (p > 0.05). Most of the participants were in favour of short post-VOLSs feedback (6.79/10 95% CI 6.58-6.99) with significant differences (p = 0.048) between participants from different regions of the world. The average number of screenshots taken was 6.1 per lecture. The learners' interests in attending on-line lectures were mainly to learn new clinical orthodontic tips (96.8%). CONCLUSION: Implementing a short feedback survey after VOLSs, the provision of recording, and the provision of certificates of attendance need to be considered.


Assuntos
Ortodontia , Ortodontistas/psicologia , Telemedicina , Adulto , Humanos , Ortodontistas/educação , Inquéritos e Questionários
6.
Prog Orthod ; 22(1): 45, 2021 Dec 27.
Artigo em Inglês | MEDLINE | ID: mdl-34957537

RESUMO

OBJECTIVE: To evaluate the long-term outcomes of Class II treatment with the Jasper Jumper appliance and comprehensive orthodontic treatment concerning inclination of the mandibular incisors and gingival recession. METHODS: Sixteen patients with Class II malocclusion at a mean age of 12.54y (SD = 1.17) were treated with the Jasper Jumper appliance and comprehensive orthodontic treatment. The mean treatment time was 2.05y (SD = 0.21). Dental records were taken before (T1), after treatment (T2) and 11.90y (SD = 0.48) after debonding (T3). The frequency of gingival recession, clinical crown height and mandibular incisor position were evaluated using intraoral photographs, digital models and lateral cephalograms. Interphase changes were evaluated using dependent t and McNemar's tests. Correlation between clinical crown height and final position of the mandibular incisors was evaluated using Pearson correlation test (P < 0.05). RESULTS: The frequency of gingival recessions increased over time and was observed in 6 (9.4%), 12 (18.8%) and 24 (37.5%) of the mandibular incisors at T1, T2 and T3, respectively. A significant increase in labial inclination and protrusion of the mandibular incisors was observed between T1 and T2 interval. The clinical crown height significantly increased in the follow-up period (T3-T2) and in the complete observation time (T3-T1). There was no correlation between the amount of labial inclination and protrusion of the mandibular incisors and clinical crown height for all time intervals. CONCLUSION: No significant correlation between the amount of labial movement of the mandibular incisor and clinical crown height increase was found.


Assuntos
Aparelhos Ativadores , Retração Gengival , Técnicas de Movimentação Dentária , Cefalometria , Criança , Seguimentos , Retração Gengival/etiologia , Humanos , Incisivo , Ortodontia , Radioisótopos de Ítrio
7.
Braz. j. oral sci ; 20: e210699, jan.-dez. 2021. tab
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1253172

RESUMO

Aim: To evaluate orthodontists' knowledge and clinical practices regarding the treatment of patients with HIV/AIDS. Methods: Cross-sectional study performed with 655 Brazilian orthodontists based on a previously calculated sample size. Self-administered questionnaires were sent to orthodontists to collect information on knowledge and clinical conduct regarding the care of patients with HIV/AIDS. The study evaluated the awareness of possible risk factors for contamination, oral manifestations of HIV, need for more information on the care of HIV-positive patients, whether orthodontic treatment is indicated in HIV-positive patients, and whether they had knowingly performed orthodontic treatment in HIV-positive patients. Simple regression models were adjusted, and crude Odds Ratios estimated the associations with 95% confidence intervals. The variables with P < 0.20 in the crude analysis were tested in multiple logistic regression models, and those with P ≤ 0.05 were maintained in the final model. Magnitudes were estimated by adjusted Odds Ratios values, with 95% confidence intervals. Results: Orthodontists who were aware of the oral manifestations of HIV/AIDS, those having work experience of more than 20 years, and those who believed that orthodontic treatment could be indicated for these patients were 3.30 (1.79-6.10), 2.74 (1.36-5.52) and 1.92 (1.13-3.24) times more likely to perform orthodontic treatment in HIV-positive patients, respectively. Most orthodontists (92.9%) reported they needed to obtain more information about orthodontic care in patients with HIV/AIDS. Conclusion: Although orthodontists reported feeling able and qualified to provide dental care to patients with HIV/AIDS, gaps in their knowledge need to be addressed with further training


Assuntos
Humanos , Masculino , Feminino , Ortodontia , Inquéritos e Questionários , Síndrome de Imunodeficiência Adquirida , HIV , Síndromes de Imunodeficiência
8.
Prog Orthod ; 22(1): 31, 2021 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-34632546

RESUMO

BACKGROUND: MicroRNAs (miRNAs) are non-coding short, single-stranded RNA molecules that may serve as biomarkers for various inflammatory and molecular mechanisms underlying bone and tissue remodeling consequent to orthodontic force application. METHODS: A thorough literature search in major databases was conducted in March 2021 to generate evidence for miRNAs in orthodontics, with prior PROSPERO registration. The initial search revealed 920 articles, subjected to strict selection criteria according to PRISMA, and resulted in final inclusion of four studies. Quality assessment by QUADAS-2 classified three studies as unclear risk-of-bias while the applicability was high. Further, bioinformatic analysis was performed to identify the target genes from the miRNA database (miRDB) and TargetScan databases and their protein-protein interaction pathways with the STRING analysis. RESULTS: Multiple miRNAs in gingival crevicular fluid (GCF) of orthodontic patients were seen, including miRNA-21, 27(a/b), 29(a/b/c), 34,146(a/b), 101, and 214 along with matrix metalloproteinases (MMPs)-1, 2, 3, 8, 9, 14 in one study. A statistically significant increase in expression of miRNA-29a/b/c,101, 21 from pre-treatment (before initiation of retraction) was seen to reach a peak at 4-6 weeks (wk) of retraction. On the contrary, miRNA-34a showed downregulation from the 1 day to 4 wk of retraction and also, negatively correlated with MMPs-2,9,14 levels at the same observation times. The distance of canine movement showed mild correlation with miRNA-27a/b, 214 at 2 wk of retraction. Bioinformatics revealed 1213 mutual target genes which were analyzed for inter-relational pathways using Cytoscape plugin, MCODE. Further, 894 prominent protein interactions were identified from the STRING database and SMAD4, IGF1, ADAMTS6, COL4A1, COL1A1, COL3A1, FGFR1, COL19A1, FBN1, COL5A1, MGAT4A, LTBP1, MSR1, COL11A1, and COL5A3 were recognized as the hub genes. Their interactions were able to isolate multiple miRNAs: hsa-miR-34a-5p, hsa-miR-29b-2-5p, hsa-miR-29b-3p, hsa-miR-34a-3p, hsa-miR-27a-5p, hsa-miR-29a-5p, hsa-miR-29b-1-5p, hsa-miR-29c-3p, hsa-miR-214-5p, hsa-miR-27a-3p, hsa-miR-29a-3p, hsamiR-146-5p, which were found promising as biomarkers for tooth movement. CONCLUSIONS: Our results support using miRNAs as biomarkers in varied orthodontic study designs and for inter-relationships with pathological settings like periodontal disease, pre-malignancies, or conditions like obesity or metabolic irregularities, etc. The identified target genes and their protein interaction pathways can be used to propose precision therapies, focusing on ideal tooth movement with minimal iatrogenic side-effects.


Assuntos
MicroRNAs , Ortodontia , Proteínas ADAMTS , Biomarcadores , Biologia Computacional , Líquido do Sulco Gengival , Humanos , MicroRNAs/genética , Saliva
9.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 56(10): 961-965, 2021 Oct 09.
Artigo em Chinês | MEDLINE | ID: mdl-34619887

RESUMO

Bimaxillary protrusion is a clinical condition with high prevalence rate, which damages facial esthetics and affects the mental health of patients. Its clinical manifestations include protrusion of lips, overexposure of teeth, vertical and sagittal overdevelopment of alveolar bone in the anterior areas of upper and lower anterior jaws, and so on. The common protocols for the treatment of severe bimaxillary protrusion is orthodontic treatment with exaction of premolars or combined orthognathic-orthodontic treatment. However, either method is of great difficulty. By systematic mechanical design, the author used the treatment system of customized lingual appliances associated with corticotomy to realize the vertical and torque control of the anterior teeth, and obtain the orthodontic treatment effect of both esthetics and health. The clinical strategies for the treatment of severe bimaxillary protrusion were provided.


Assuntos
Má Oclusão , Procedimentos de Ancoragem Ortodôntica , Ortodontia , Adulto , Estética Dentária , Humanos , Ortodontia Corretiva
10.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 56(10): 971-977, 2021 Oct 09.
Artigo em Chinês | MEDLINE | ID: mdl-34619889

RESUMO

In this paper, the clinical application and basic research progress of periodontally accelerated osteogenic orthodontics technology (PAOO) are introduced in detail. The key contents include: the development and evolution of minimally invasive, simplified and digital clinical methods of corticotomy; the role, significance and improvement of bone augmentation surgery; factors affecting tooth movement rate and treatment course; indications, contraindications and complications; prognosis and stability; basic research status of PAOO.


Assuntos
Ortodontia , Assistência Odontológica , Humanos , Osteogênese , Tecnologia , Técnicas de Movimentação Dentária
11.
Zhonghua Kou Qiang Yi Xue Za Zhi ; 56(10): 978-982, 2021 Oct 09.
Artigo em Chinês | MEDLINE | ID: mdl-34619890

RESUMO

Orthodontic tooth movement inevitably affects adjacent periodontal tissue. The labiobuccal alveolar bone is generally thin, and patients with dental crowding often present alveolar dehiscence and fenestration. These may lead to prolonged treatment time, even gingival atrophy, tooth loosening and other complications in the orthodontic tooth movement. Periodontally accelerated osteogenic orthodontics (PAOO) could accelerate the orthodontic tooth movement and promote the formation of new bone by using corticotomy and bone grafting. This article, starting from the influence of orthodontic treatment on periodontal hard tissue, describes the application of PAOO in orthodontic treatment.


Assuntos
Ortodontia , Transplante Ósseo , Assistência Odontológica , Humanos , Osteogênese , Técnicas de Movimentação Dentária
13.
Adv Clin Exp Med ; 30(10): 1065-1074, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34610222

RESUMO

Artificial intelligence (AI) applications have significantly improved our everyday quality of life. The last decade has witnessed the emergence of up-and-coming applications in the field of dentistry. It is hopeful that AI, especially machine learning (ML), due to its powerful capacity for image processing and decision support systems, will find extensive application in orthodontics in the future. We performed a comprehensive literature review of the latest studies on the application of ML in orthodontic procedures, including diagnosis, decision-making and treatment. Machine learning models have been found to perform similar to or with even higher accuracy than humans in landmark identification, skeletal classification, bone age prediction, and tooth segmentation. Meanwhile, compared to human experts, ML algorithms allow for high agreement and stability in orthodontic decision-making procedures and treatment effect evaluation. However, current research on ML raises important questions regarding its interpretability and dataset sample reliability. Therefore, more collaboration between orthodontic professionals and technicians is urged to achieve a positive symbiosis between AI and the clinic.


Assuntos
Inteligência Artificial , Ortodontia , Humanos , Aprendizado de Máquina , Qualidade de Vida , Reprodutibilidade dos Testes
14.
Br Dent J ; 231(8): 503-511, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34686818

RESUMO

Introduction The Royal College of Surgeons of England (RCSEng) and the Royal College of Physicians and Surgeons of Glasgow (RCPSG) offer the bi-collegiate Membership in Orthodontics (MOrth) examination, a summative assessment of specialist knowledge, skill and behaviour in orthodontics. The COVID-19 pandemic has had a profound global effect on almost every facet of normal life, including the conduct of face-to-face examinations. We highlight development, implementation and feedback for the bi-collegiate MOrth Part 2 examination delivered remotely to a cohort of candidates in September 2020 by RCSEng/RCPSG.Methods Two anonymised online surveys (Google Forms) were distributed via electronic mail following completion of the examination diet. Forty-two candidates were sent a survey covering four domains and comprising a total of 31 questions. The 20 examiners were sent a survey containing eight questions. In both surveys, free-text responses were also collected. A rating system was used to categorise responses. All survey responses were summarised in an online data collection sheet.Results The response rate was 78.5% (33/42) and 75% (15/20) for candidates and examiners, respectively. Overall, favourable responses in relation to all sections of the assessment were elicited from candidates with the majority (mean 79.8%; 75.8-81.9%) reporting that the online examination format worked well. Equally, favourable responses were reported by examiners. Notably, 80% of examiners felt that the online exam style did not affect the mark a candidate would receive, and 100% were confident that the marks the candidates received were a reflection of their ability and were not affected by the online delivery of the assessment.Conclusions The feedback from both candidates and examiners relating to an online remote assessment of the bi-collegiate MOrth Part 2 was generally positive. Based on the survey responses, this format of a high-stakes examination was acceptable to all stakeholders, and demonstrated a high level of perceived validity and reliability in terms of content.


Assuntos
COVID-19 , Ortodontia , Avaliação Educacional , Retroalimentação , Humanos , Pandemias , Reprodutibilidade dos Testes , SARS-CoV-2
15.
Dental Press J Orthod ; 26(4): e21spe4, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34524383

RESUMO

INTRODUCTION: Having a beautiful smile is the main desire of people seeking dental treatment. To achieve this goal, many variables must be considered. These include tooth alignment, color, shape and size, besides their harmonious relationship with the lips and face. An individualized diagnosis is essential to achieve the best result. Within this context, facial analysis and the characteristics of shape, size and position of maxillary incisors play a key role. METHODS: This paper describes clinical situations in which interdisciplinary treatment was performed to achieve esthetic results in a conservative manner and ensuring greater stability. In most cases requiring reshaping of maxillary incisors for esthetic reasons, prior orthodontic movement is essential. The main focus of this paper is to discuss the many variables involved in these situations. RESULTS AND CONCLUSION: The results of treatments described in this paper were obtained by means of a multidisciplinary approach, involving Orthodontics and Esthetic Dentistry, acting in harmony and recognizing their possibilities and limitations, in order to offer patients the best esthetic solution for their smile. The best treatment option is not always the easiest or fastest. The dentist, as a health professional, should consider the patients' wishes but also perform treatments with minimal intervention, and the best and most predictable esthetic result, also focusing on function and health.


Assuntos
Incisivo , Ortodontia , Estética Dentária , Humanos , Maxila , Sorriso
16.
PLoS One ; 16(9): e0257224, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34516568

RESUMO

OBJECTIVES: A novel magnetic resonance imaging (MRI) scan protocol is presented on the basis of ultra-short time to echo (UTE). By this MRI cephalometric projections (MCPs) can be acquired without the need of post processing in one shot. Different technical parameterizations of the protocol are performed. Their impact on the performance of MCPs is evaluated in comparison to the gold standard-the lateral cephalometric radiography (LCR) for cephalometric analysis (CA) in orthodontics. METHODS: Seven MCPs with various scan parameters influencing the scan duration and one LCR are used from one subject. 40 expert assessors performed CA for 14 predefined cephalometric landmarks. Relative metric distances and absolute angular measurements were calculated. Statistical analysis is presented and the deviations are highlighted to demonstrate the potential of the method for further analysis. RESULTS: The MCPs are acquired in 5-154 seconds, depending on resolution and contrast. Mean relative distances were 2.4-2.7 mm in MCPs and 1.6 mm in LCR, which demonstrate the accuracy and level of agreement of the expert assessors in identifying anatomical landmarks. In comparison to other studies, the presented MCP performed similar in angular analysis and demonstrated on average deviation of 1.2° ±1.1° in comparison to LCR. Despite the point articulare (Ar) and the related gonial angle the calculate distances and angles show outcomes in the range of ±2°/2mm. CONCLUSIONS: MCPs can be acquired much faster in comparison to other techniques known from literature for CA. This study demonstrated the potential of the new method and showed first feasible results. Further research is needed to analyze the performance on a broad range of patients.


Assuntos
Cefalometria/métodos , Imageamento por Ressonância Magnética/métodos , Adulto , Humanos , Masculino , Ortodontia/métodos
18.
Am J Orthod Dentofacial Orthop ; 160(4): 629-631, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-34579821
19.
Oral Health Prev Dent ; 19(1): 465-469, 2021 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-34585871

RESUMO

PURPOSE: Teledentistry uses computer-based technology to render remote healthcare-related therapy and/or consultation. The purpose of this study was to review the contributions and concerns about the use of teledentistry in clinical orthodontics. MATERIALS AND METHODS: The focused question was "What are the benefits and limitations of the use of teledentistry in clinical orthodontics?" PubMed/Medline, Scopus, Embase, Google-Scholar and ISI Web of knowledge databases were searched up to and including February 2021 using the following key words: 1. teledentistry; 2. teleorthodontics; 3. ethics; 4. orthodontics; 5. SCOPE: The inclusion criteria were: (a) clinical studies; (b) case reports; and (c) case series. Studies on animal models, in vitro and/or ex vivo studies, letters, commentaries, and narrative and systematic reviews were not included in the search. The design of the study was tailored to recapitulate the relevant information. RESULTS: Four clinical studies fulfilled the eligibility criteria and were processed for data extraction. All studies had been performed after obtaining informed consent from the participants. Three studies reported that teledentistry was useful in clinical orthodontics. In one study, a clear conclusion could not be drawn regarding the benefits of teledentistry in clinical orthodontics. Two out of the four studies did not obtain prior approval from an institutional review board or ethics committee. Three studies did not report any measures that were undertaken to safeguard the electronic transfer of patient-related health information. CONCLUSIONS: Teledentistry is a useful tool for initial patient assessments; however, it is not a reliable alternative for in-office clinical orthodontic practice.


Assuntos
Ortodontia , Telemedicina , Atenção à Saúde , Assistência Odontológica , Humanos , Encaminhamento e Consulta
20.
Br Dent J ; 231(3): 191-196, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-34385651

RESUMO

John Nutting Farrar (1839-1913) has been hailed as the 'father of American orthodontics' and his textbook, published in 1888, is often claimed to be the first devoted exclusively to orthodontics, while the American Emerson Angell is supposed to be the inventor of the orthodontic 'jackscrew'. However, the unknown Englishman Charles Gaine, identified by Lilian Lindsay in 1933 as the author of the first British orthodontic textbook, could be said to be the father of British orthodontics, as the publication of his book in 1858 and his demonstration of the screw appliance at the Great Exhibition of 1851 predated both these transatlantic events.


Assuntos
Ortodontia , Estados Unidos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...