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orthodontic tooth movement

Alejandro Iglesias-Linares, Lorri Ann Morford, James Kennedy Hartsfield
When orthodontic patients desire shorter treatment times with aesthetic results and long-term stability, it is important for the orthodontist to understand the potential limitations and problems that may arise during standard and/or technology-assisted accelerated treatment. Bone density plays an important role in facilitating orthodontic tooth movement (OTM), such that reductions in bone density can significantly increase movement velocity. Lifestyle, genetic background, environmental factors, and disease status all can influence a patients' overall health and bone density...
October 20, 2016: Current Osteoporosis Reports
Amer Z Nahas, Said A Samara, Tannaz A Rastegar-Lari
The aim of this study was to evaluate the effect of low-level light therapy using light-emitting diodes (LEDs) on the speed of tooth movements that were required for the leveling and aligning of the lower anterior segment during non-extraction orthodontic treatment. The sample was comprised of patients (n = 40) with lower anterior crowding who were treated with self-ligating orthodontic brackets and a standardized wire sequence. A test group of patients (n = 20) who were treated with extraoral infrared light therapy for 20 min daily with at least 80 % compliance was compared to a control group (n = 20)...
October 20, 2016: Lasers in Medical Science
Michael Wolf, U Schulte, K Küpper, C Bourauel, L Keilig, S N Papageorgiou, C Dirk, C Kirschneck, N Daratsianos, A Jäger
OBJECTIVES: While permanent retention is today the method of choice to stabilize orthodontic treatment outcomes, recent studies have increasingly reported posttreatment changes in tooth position during permanent retention. We conducted this study to analyze changes in the anterior mandible, whether the changes follow an underlying movement pattern, and, aiming for a preventive strategy, whether any risk factors could be identified comparing findings with the pretreatment situations. METHODS: We included 30 patients who had worn fixed Twistflex retainers (UK 3-3) extending from canine to canine in the mandible...
October 19, 2016: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
Masaaki Ikeda, Yoshitaka Yoshimura, Takashi Kikuiri, Mino Matsuno, Tomokazu Hasegawa, Kumu Fukushima, Takako Hayakawa, Hajime Minamikawa, Kuniaki Suzuki, Junichiro Iida
Bone remodeling is an important factor in orthodontic tooth movement. During orthodontic treatment, osteoclasts are subjected to various mechanical stimuli, and this promotes or inhibits osteoclast differentiation and fusion. It has been previously reported that the release from tensile force induces osteoclast differentiation. However, little is known about how release from compressive force affects osteoclasts. The present study investigated the effects of release from compressive force on osteoclasts. The number of tartrate‑resistant acid phosphatase (TRAP)‑positive multinucleated osteoclasts derived from RAW264...
October 5, 2016: Molecular Medicine Reports
Osmar A Cuoghi, Francielle Topolski, Lorraine P de Faria, Marcos R de Mendonça
AIM: To evaluate the correlation between pain and tissue damage in response to orthodontic tooth movement (OTM), such as hyalinization and external apical root resorption (EARR). MATERIALS AND METHODS: The literature review was used as a methodological strategy, following the knowledge development process - constructivist (ProKnow-C). Study axes were defined and keywords that best represented each axis were selected. The terms were submitted to an adherence test and validation, resulting in 12 keyword combinations...
September 1, 2016: Journal of Contemporary Dental Practice
Takeshi Muguruma, Masahiro Iijima, Toshihiro Yuasa, Kyotaro Kawaguchi, Itaru Mizoguchi
OBJECTIVE: To analyze the coatings covering esthetic orthodontic wires and the influence of such coatings on bending and frictional properties. MATERIALS AND METHODS: Four commercially available, coated esthetic archwires were evaluated for their cross-sectional dimensions, surface roughness (Ra), nanomechanical properties (nanohardness, nanoelastic modulus), three-point bending, and static frictional force. Matched, noncoated control wires were also assessed. RESULTS: One of the coated wires had a similar inner core dimension and elasticity compared to the noncoated control wire, and no significant differences between their static frictional forces were observed...
October 12, 2016: Angle Orthodontist
S Barone, A Paoli, A V Razionale, R Savignano
Transparent and removable aligners represent an effective solution to correct various orthodontic malocclusions through minimally invasive procedures. An aligner-based treatment requires patients to sequentially wear dentition-mating shells obtained by thermoforming polymeric disks on reference dental models. An aligner is shaped introducing a geometrical mismatch with respect to the actual tooth positions to induce a loading system, which moves the target teeth toward the correct positions. The common practice is based on selecting the aligner features (material, thickness, and auxiliary elements) by only considering clinician's subjective assessments...
October 5, 2016: International Journal for Numerical Methods in Biomedical Engineering
Alaa M H Alfawal, Mohammad Y Hajeer, Mowaffak A Ajaj, Omar Hamadah, Bassel Brad
OBJECTIVE: The objective of this study was to assess systematically the available scientific evidence relating the efficiency of minimally invasive surgical procedures in accelerating orthodontic tooth movement and the adverse effects associated with these procedures. METHODS: Electronic search of these databases CENTRAL, EMBASE, Scopus, PubMed, Web of Science, Google Scholar Beta, Trip, OpenGrey and PQDT OPEN was performed (last updated January 2016). The reference lists of the included studies were hand searched...
December 2016: Progress in Orthodontics
Eliane Hermes Dutra, Ravindra Nanda, Sumit Yadav
The tooth-periodontal ligament-alveolar bone complex acts symbiotically to dissipate the mechanical loads incurred during mastication and/or orthodontic tooth movement. The periodontal ligament functions both in the tension and compression. At the molecular and celleular levels, the loads in the periodontal ligament trigger mechanobiological events in the alveolar bone, which leads to bone modeling and remodeling. The current review focuses on the bone response to mechanical loading of the periodontal ligament on the tension and pressure sides...
September 28, 2016: Current Osteoporosis Reports
S Yassaei, H Aghili, J Tavakol Afshari, A Bagherpour, F Eslami
The aim of this study was to evaluate the effects of low-level laser irradiation on the rate of orthodontic tooth movement (OTM) and the interleukin-6 (IL-6) concentration in gingival crevicular fluid (GCF) during orthodontic treatment. In this randomized split-mouth double blind clinical trial, 11 female patients aged 14 to 25 years (mean 19 ± 4.21 year), who required canine retraction following four first premolars extraction, were selected. The GaAlAs laser diode laser (A.R.C. Laser GmbH, Nürnberg, Germany) (980 nm, 100 mW, 5...
September 28, 2016: Lasers in Medical Science
H Ashrafi, M Shariyat
INTRODUCTION: Nano-indentation has recently been employed as a powerful tool for determining the mechanical properties of biological tissues on nano and micro scales. A majority of soft biological tissues such as ligaments and tendons exhibit viscoelastic or time-dependent behaviors. The constitutive characterization of soft tissues is among very important subjects in clinical medicine and especially, biomechanics fields. Periodontal ligament plays an important role in initiating tooth movement when loads are applied to teeth with orthodontic appliances...
June 2016: Journal of Biomedical Physics & Engineering
Dler Ali, Hnd Mohammed, Seung-Hwan Koo, Kyung-Hwa Kang, Sang-Cheol Kim
OBJECTIVE: The aim of this study was to analyze tooth movement and arch width changes in maxillary dentition following nonextraction treatment with orthodontic mini-implant (OMI) anchorage in Class II division 1 malocclusions. METHODS: Seventeen adult patients diagnosed with Angle's Class II division 1 malocclusion were treated by nonextraction with OMIs as anchorage for distalization of whole maxillary dentition. Three-dimensional virtual maxillary models were superimposed with the best-fit method at the pretreatment and post-treatment stages...
September 2016: Korean Journal of Orthodontics
Zohreh Hedayati, Mehrdad Shomali
BACKGROUND: Nowadays, mini screws are used in orthodontic tooth movement to obtain maximum or absolute anchorage. They have gained popularity among orthodontists for en masse retraction of anterior teeth after first premolar extraction in maximum anchorage cases. The purpose of this study was to determine the type of anterior tooth movement during the time when force was applied from different mini screw placements to the anterior power arm with various heights. METHODS: A finite element method was used for modeling maxillary teeth and bone structure...
December 2016: Progress in Orthodontics
Manal A Bakathir, Amal I Linjawi, Samia S Omar, Ahad B Aboqura, Ali H Hassan
OBJECTIVES: To investigate the effects of nicotine on orthodontic tooth movement and accompanying histological and immunohistochemical changes in rats. METHODS: An experimental study conducted at King Abdulaziz University, Jeddah, Saudi Arabia between 2013 and 2014. Thirty-two rats randomly divided into 4 groups. Three were experimental, received daily nicotine injections: group A: 0.37 mg/kg, group B: 0.57 mg/kg, and group C: 0.93 mg/kg. The control group  (group D) received a daily injection of 0...
October 2016: Saudi Medical Journal
Selly Sayuri Suzuki, Aguinaldo Silva Garcez, Hideo Suzuki, Edilson Ervolino, Won Moon, Martha Simões Ribeiro
This study evaluated the biological effects of low-level laser therapy (LLLT) on bone remodeling, tooth displacement and root resorption, occurred during the orthodontic tooth movement. Upper first molars of a total of sixty-eight male rats were subjected to orthodontic tooth movement and euthanized on days 3, 6, 9, 14 and 21 days and divided as negative control, control and LLLT group. Tooth displacement and histomorphometric analysis were performed in all animals; scanning electron microscopy analysis was done on days 3, 6 and 9, as well as the immunohistochemistry analysis of RANKL/OPG and TRAP markers...
September 20, 2016: Journal of Biophotonics
Nan Ru, Sean Shih-Yao Liu, Yuxing Bai, Song Li, Yunfeng Liu, Guanjun Zhou
OBJECTIVE:   BoneCeramic can regenerate bone in alveolar defects, but it remains unknown whether it is feasible to move a tooth through BoneCeramic grafting sites. The objective of this study was to investigate three-dimensional real-time bone responses and micromechanical properties in the grafting sites during orthodontic tooth movement. METHODS:   Sixty 5-week-old rats were randomly assigned into three groups to receive BoneCeramic, natural bovine cancellous bone particles (Bio-Oss), and no graft, respectively, after the extraction of the left maxillary first molar...
September 12, 2016: Cleft Palate-craniofacial Journal
Mohammad Reza Jahanbakhshi, Ali Mohammad Kalantar Motamedi, Masoud Feizbakhsh, Ahmad Mogharehabed
BACKGROUND: Selective alveolar corticotomy is defined as an intentional injury to cortical bone. This technique is an effective means of accelerating orthodontic tooth movement. The aim of this study is to evaluate the effect of buccal corticotomy in accelerating maxillary canine retraction. MATERIALS AND METHODS: The sample in this clinical trial study consisted of 15 adult female patients with therapeutic need for extraction of maxillary first premolars and maximum canine retraction...
July 2016: Dental Research Journal
Andreas Hellak, Nicola Schmidt, Michael Schauseil, Steffen Stein, Thomas Drechsler, Heike Maria Korbmacher-Steiner
BACKGROUND: The aim of this study was to use three-dimensional datasets to identify associations between treatment for adult crowding using Invisalign and interproximal enamel reduction (IER) and changes in the bone volume. METHODS: A total of 60 digital cone beam computed tomography (CBCT) scans from 30 patients (28 women, two men; 30 CBCTs pretreatment, 30 posttreatment) were examined retrospectively in order to record bone volume three-dimensionally before and after treatment...
2016: BMC Oral Health
Gaetano Isola, Giovanni Matarese, Giancarlo Cordasco, Letizia Perillo, Luca Ramaglia
Orthodontic tooth movement differs significantly from the physiological tooth movement, as it determines a biological response of the surrounding tissues of the teeth, resulting in a remodelling of the periodontal ligament and the alveolar bone. The result is a biochemical adaptive response to the application of the orthodontic force with the reorganization of the intracellular and the extracellular matrix, in addition to a change of the local vascularization. This in turn leads to the synthesis and the release of arachidonic acid, growth factors, metabolites, cytokines and various enzymes...
October 2016: Minerva Stomatologica
Carolina Ferreira Gonçalves, Amanda de Carvalho Desiderá, Glauce Crivelaro do Nascimento, João Paulo Mardegan Issa, Christie Ramos Andrade Leite-Panissi
Photobiomodulation (PBM) is a therapy induced by a specific type of laser that affects biologic systems through non-thermal ways. The study of its basic mechanism has gained interest since little is known about the causes of the different effects of this treatment. In the present study, we investigated the action of the PBM application rate changes in the peri-implant tissues in rats subjected to tooth movement in different periods. Wistar rats (±250 g) received an apparatus in the region of the central incisors superiors tightly (70 g) or not, and they were also subjected to one or three PBM sessions...
August 30, 2016: Lasers in Medical Science
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