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Orthodontics

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https://www.readbyqxmd.com/read/28230910/adhesives-for-bonded-molar-tubes-during-fixed-brace-treatment
#1
REVIEW
Declan T Millett, Nicky A Mandall, Rye Cr Mattick, Joy Hickman, Anne-Marie Glenny
BACKGROUND: Orthodontic treatment involves using fixed or removable appliances (dental braces) to correct the positions of teeth. The success of a fixed appliance depends partly on the metal attachments (brackets and bands) being glued to the teeth so that they do not become detached during treatment. Brackets (metal squares) are usually attached to teeth other than molars, where bands (metal rings that go round each tooth) are more commonly used. Orthodontic tubes (stainless steel tubes that allow wires to pass through them), are typically welded to bands but they may also be glued directly (bonded) to molars...
February 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28229856/-how-to-analyze-periodontal-morphotypes-in-order-to-reduce-the-risk-of-periodontal-recession
#2
Mathilde Jalladaud, Mike Lahmi, Corinne Lallam
INTRODUCTION: The periodontal morphotype is a leading feature to be born in mind during surgical, implant, prosthetic, restorative as well as orthodontic treatment. A fragile morphotype will rapidly trigger severe and worrying clinical repercussions for the patient. MATERIALS AND METHODS: In order to minimize the risks involved, sound knowledge of the different morphotypes and of the techniques for clinically evaluating them is a major requirement. These factors need to be regularly reassessed since morphotypes can vary throughout the course of treatment...
March 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/28229854/-how-to-manage-with-rigour-but-flexibility-an-orthodontic-practice
#3
Edmond Binhas, Corinne Binhas
INTRODUCTION: An orthodontic office owner must understand the context and then combine logic, emotion, intuition and common sense. The productivity approach is no longer acceptable. It is necessary to combine rigour, flexibility and pragmatism. DISCUSSION: The obsessive perfectionism is ineffective. In fact, there are four ways to demonstrate a flexible determination: persevere when appropriate, win the support of your entourage, back on some decisions, appeal to the collective will...
March 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/28229850/-effect-of-dental-arch-length-decrease-during-orthodontic-treatment-in-the-upper-airway-development-a-review
#4
Stéphanie Haddad, Jean-Baptiste Kerbrat, Thomas Schouman, Patrick Goudot
INTRODUCTION: A possible relation between an upper airway space decrease and the development of obstructive sleep apnea syndrom explains the importance to know the effect of the modification of dental arch length on the upper airway during orthodontic treatment. OBJECTIVES: The aim of this article is to expose recent knowledge about upper airway development and dental arch length decrease factors, to determine the influence of this decrease on upper airway development...
March 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/28229849/-possibilities-and-limits-of-orthodontico-surgical-treatments-in-case-of-macrodontia
#5
Christian Paulus
INTRODUCTION: Tooth-arch discrepancy is a disproportion between dental volume and bone base. Extraction therapy can be a solution in case of excessive tooth volume and insufficient basal bone length. Techniques including bone distraction popularized by Ilizarov in the fifties allow the increase of the basal arch length in the maxilla as well as in the mandible. MATERIALS AND METHODS: We will describe the procedure of this dental arch length augmentation since the reflection about the therapeutic plan until the sufficient arch length is obtained and describe the indications of this orthodontic and surgical treatment in case of dental crowding, buccal and labial inclination and functional problems...
March 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/28229848/-the-extraction-non-extraction-dilemma-a-case-in-the-border
#6
José Chaqués-Asensi
INTRODUCTION: The extraction-non extraction dilemma is a classic one in the history of orthodontics [2, 19, 30]. In some cases the decision seems to be very clear whereas in some others discrepancies among clinicians can easily be found. Different authors propose different protocols in order to decide whether extractions are necessary in a particular clinical situation. In the last 25 years, the debate has been reframed with new non-extractionists trends based on new treatment philosophies or mechanics...
March 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/28228735/the-potential-use-of-pharmacological-agents-to-modulate-orthodontic-tooth-movement-otm
#7
REVIEW
Thaleia Kouskoura, Christos Katsaros, Stephan von Gunten
The biological processes that come into play during orthodontic tooth movement (OTM) have been shown to be influenced by a variety of pharmacological agents. The effects of such agents are of particular relevance to the clinician as the rate of tooth movement can be accelerated or reduced as a result. This review aims to provide an overview of recent insights into drug-mediated effects and the potential use of drugs to influence the rate of tooth movement during orthodontic treatment. The limitations of current experimental models and the need for well-designed clinical and pre-clinical studies are also discussed...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28228627/orthodontic-archwire-composition-and-phase-analyses-by-neutron-spectroscopy
#8
Kun V Tian, Giulia Festa, Francesco Basoli, Giuseppina Laganà, Antonella Scherillo, Carla Andreani, Patrizio Bollero, Silvia Licoccia, Roberto Senesi, Paola Cozza
Quantitative metallurgical and phase analyses employing neutron diffraction technique were conducted on two as-received commercial rectangular austenitic stainless steel orthodontic archwires, G&H and Azdent, 0.43×0.64 mm (0.017×0.025 inch). Results showed a bi-phase structure containing martensitic phase (45.67% for G&H and 6.62% for Azdent) in addition to the expected metastable austenite. The former may be a strain-induced phase-transformation arising during the cold working process of wire fabrication...
February 22, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28227885/orthodontic-force-simulation-of-tooth-pdl-bone-complex-under-archwire-loading
#9
Xinwen Zhou, Zeyang Xia, Yangzhou Gan, Dongxia Zhang, Jing Xiong, Peng Fang, Guanglin Li, Qunfei Zhao, Xinwen Zhou, Zeyang Xia, Yangzhou Gan, Dongxia Zhang, Jing Xiong, Peng Fang, Guanglin Li, Qunfei Zhao, Zeyang Xia, Peng Fang, Xinwen Zhou, Dongxia Zhang, Yangzhou Gan, Guanglin Li, Jing Xiong, Qunfei Zhao
Orthodontic force simulation is very important for the guidance of clinical orthodontic treatment. Previous works were mainly conducted by directly loading the force on a single or a few teeth. However, in clinic, the orthodontic force is provided by loading orthodontic appliances, and there currently is no appropriate way to measure the force on the teeth provided by the loaded appliances. This study presents a method to simulate the orthodontic force of a whole Tooth-Periodontal Ligament-Bone Complex (TPBC) by directly loading the archwire to the dentition applying the finite element method...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227783/tooth-separation-from-dental-model-using-segmentation-field
#10
Hao Wang, Zhongyi Li, Hao Wang, Zhongyi Li, Zhongyi Li, Hao Wang
Tooth segmentation on dental model is an essential step of computer-aided-design systems for orthodontic virtual treatment planning. However, efficiently identifying cutting boundary to separate tooth from dental model still remains a challenge, due to various geometrical shapes of teeth, complex tooth arrangements and varying degrees of crowding problem. Most segmentation approaches presented before are not able to achieve a balance between fine segmentation results and simple operating procedure. In this article, we present a novel and efficient framework that achieves tooth segmentation based on the segmentation field...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226958/six-axis-orthodontic-force-and-moment-sensing-system-for-dentist-technique-training
#11
Yoshiyuki Midorikawa, Hiroshi Takemura, Hiroshi Mizoguchi, Kohei Soga, Masao Kamimura, Kazuhiro Suga, Wei-Jen Lai, Zuisei Kanno, Motohiro Uo, Yoshiyuki Midorikawa, Hiroshi Takemura, Hiroshi Mizoguchi, Kohei Soga, Masao Kamimura, Kazuhiro Suga, Wei-Jen Lai, Zuisei Kanno, Motohiro Uo, Wei-Jen Lai, Motohiro Uo, Hiroshi Takemura, Masao Kamimura, Zuisei Kanno, Yoshiyuki Midorikawa, Hiroshi Mizoguchi, Kazuhiro Suga, Kohei Soga
The purpose of this study is to develop a sensing system device that measures three-axis orthodontic forces and three-axis orthodontic moments for dentist training. The developed sensing system is composed of six-axis force sensors, action sticks, sliders, and tooth models. The developed system also simulates various types of tooth row shape patterns in orthodontic operations, and measures a 14 × 6 axis orthodontic force and moment from tooth models simultaneously. The average force and moment error per loaded axis were 2...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224175/differences-between-active-and-passive-self-ligating-brackets-for-orthodontic-treatment-systematic-review-and-meta-analysis-based-on-randomized-clinical-trials
#12
Xianrui Yang, Yiruo He, Tian Chen, Mengyuan Zhao, Yinqiu Yan, Hongzhe Wang, Ding Bai
PURPOSE: In orthodontic treatment, the effects of differences in the design between active and passive self-ligating bracket (ASLB and PSLB, respectively) are usually neglected. This study investigated differences in effectiveness and efficiency between ASLBs and PSLBs. METHODS: To identify randomized, controlled clinical trials (RCTs) comparing ASLB with PSLB, the electronic databases Medline, Embase, Cochrane Central Register of Controlled Trials, Chinese Biomedical Literature Database, China National Knowledge Infrastructure, and Chinese Medical Journal Database were searched without language or time limits...
February 21, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28223136/wnt3%C3%AE-and-transforming-growth-factor-%C3%AE-induce-myofibroblast-differentiation-from-periodontal-ligament-cells-via-different-pathways
#13
Hui Xu, Yao He, Jian Q Feng, Rui Shu, Zhe Liu, Jingyu Li, Yating Wang, Yang Xu, Huan Zeng, Xin Xu, Zichao Xiang, Chaoran Xue, Ding Bai, Xianglong Han
Myofibroblasts are specialized cells that play a key role in connective tissue remodeling and reconstruction. Alpha-smooth muscle actin (α-SMA), vimentin and tenascin-C are myofibroblast phenotype, while α-SMA is the phenotypic marker. The observation that human periodontal ligament cells (hPDLCs) differentiate into myofibroblasts under orthodontic force has provided a new perspective for understanding of the biological and biomechanical mechanisms involved in orthodontic tooth movement. However, the cell-specific molecular mechanisms leading to myofibroblast differentiation in the periodontal ligament (PDL) remain unclear...
February 18, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28222388/microbial-profile-of-dental-plaque-associated-to-white-spot-lesions-in-orthodontic-patients-immediately-after-the-bracket-removal
#14
Moniek W Beerens, Jacob M Ten Cate, Monique H van der Veen
OBJECTIVE: Denaturing Gradient Gel Electrophoresis (DGGE) is suggested to predict caries risk in young children. Such a tool would be valuable in orthodontic patients undergoing treatment with fixed appliances. In this cross-sectional study the applicability of DGGE and conventional microbiology for caries risk assessment in orthodontic patients were assessed. DESIGN: Dental plaque was obtained from orthodontic patients immediately prior to bracket removal. Presence of white spot lesions (WSL) was assessed immediately post debracketing...
February 9, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28220482/morphological-interaction-between-the-nasal-septum-and-nasofacial-skeleton-during-human-ontogeny
#15
Matthew J Goergen, Nathan E Holton, Thorsten Grünheid
The nasal septal cartilage is thought to be a key growth center that contributes to nasofacial skeletal development. Despite the developmental influence of the nasal septum however, humans often exhibit a high frequency of septal deviation suggesting discordance in the growth between the septum and surrounding nasofacial skeleton. While there are numerous etiological factors that contribute to septal deviation, the surrounding nasofacial skeleton may also act to constrain the septum, resulting in altered patterns of growth...
February 20, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28220183/quantitative-light-induced-fluorescence-images-and-digital-photographs-reproducibility-of-manually-marked-demineralisations
#16
Rosalia Tatano, Eva E Ehrlich, Benjamin Berkels, Ekaterina Sirazitdinova, Thomas M Deserno, Ulrike B Fritz
OBJECTIVE: Hard tooth tissue demineralisation is an undesirable side effect of orthodontic treatment with fixed appliances. Whereas both clinically and in digital photographs (DP), demineralisations appear as white spot lesions, WSLs appear as dark areas when quantitative light-induced fluorescence (QLF) imaging is used. This study aims at comparing the reproducibility of the detection of decalcified tooth areas in DP and QLF. MATERIALS AND METHODS: DP and QLF pairs were acquired from 139 teeth of 32 patients after braces removal...
February 20, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28217538/prevalence-of-facial-asymmetry-in-tirupati-population-a-posteroanterior-cephalometric-and-photographic-study
#17
M Radhika Reddy, Srinivasa R Bogavilli, V Raghavendra, Venkata S Polina, Shaik Z Basha, R Preetham
AIMS AND OBJECTIVE: The human face is the most prominent aspect in human social interactions, and therefore, it seems reasonable opting for orthodontic treatment is to overcome psychosocial difficulties relating to facial and dental appearance and enhance the quality of life in doing so. MATERIALS AND METHODS: Posteroanterior cephalograms and frontal photographs of 100 participants (50 males and 50 females) were analyzed to evaluate skeletal asymmetry by the analysis suggested by Grummons...
December 2016: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28214278/patient-parent-expectations-of-orthodontic-treatment
#18
Omolara Abiodun Obilade, Oluranti Olatokunbo da Costa, Oluwatosin Oluyemi Sanu
BACKGROUND: Expectations of orthodontic treatment may differ between the patient and their parents, as the parents' expectations may not reflect those of the child. OBJECTIVES: The aim of this study, therefore, was to determine the expectations of patients and their parents. MATERIALS AND METHODS: This was a clinic-based, comparative, cross-sectional study involving 110 patients aged between 10 and 19 years, as well as their accompanying parents or guardians...
February 14, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28213930/antibiotic-administration-alleviates-the-aggravating-effect-of-orthodontic-force-on-ligature-induced-experimental-periodontitis-bone-loss-in-mice
#19
J Shi, Z Liu, T Kawai, Y Zhou, X Han
BACKGROUND AND OBJECTIVES: It is recognized that orthodontic force (OF) has an aggravating effect on the progression of destructive periodontitis if periodontitis have not been well controlled. However, the underlying mechanism is not completely clear. This study was to investigate the effect of antibiotic administration on OF-aggravated, ligature-induced experimental periodontitis in mice. MATERIAL AND METHODS: C57BL/6 mice (male, 8 wk old) were divided into three groups (n = 8)...
February 18, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28209011/non-surgical-management-of-skeletal-class-iii-malocclusion-with-bilateral-posterior-crossbite-a-case-report
#20
Lalima Kumari, Kamal Nayan
A 16-year-old female patient with skeletal Class III malocclusion and bilateral posterior cross bite complaining of difficulty in chewing was treated orthodontically without surgery (camouflage treatment). The treatment comprised of fixed orthodontic treatment with MBT prescription (0.022˝×0.028˝ slot) using quad helix appliance for bilateral expansion of maxillary arch and Class III elastics for occlusal correction. Post-treatment records showed normal overbite and overjet with acceptable occlusion. So with this treatment strategy of expanding the maxillary arch using a quad helix appliance and use of Class III elastics, we achieved a good result with optimal occlusion...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
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