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orthodontic tooth movement

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https://www.readbyqxmd.com/read/27905816/cementocyte-cell-death-occurs-in-rat-cellular-cementum-during-orthodontic-tooth-movement
#1
Humihiro Matsuzawa, Naoko Toriya, Yuya Nakao, Moe Konno-Nagasaka, Toshiya Arakawa, Miki Okayama, Itaru Mizoguchi
OBJECTIVE: To clarify the mechanism of root resorption during orthodontic treatment, we examined cementocyte cell death and root resorption in the cellular cementum on the pressure side during experimental tooth movement. MATERIALS AND METHODS: Using 8-week-old male Wistar rats, the right first molar was pushed mesiobuccally with a force of 40 g by a Ni-Ti alloy wire while the contralateral first molar was used as a control. Localization and number of cleaved caspase-3-positive and single-stranded DNA (ssDNA) - positive cells were evaluated using dual-label immunohistochemistry with anticleaved caspase-3 and anti-ssDNA antibodies...
December 1, 2016: Angle Orthodontist
https://www.readbyqxmd.com/read/27894545/ability-of-mini-implant-facilitated-micro-osteoperforations-to-accelerate-tooth-movement-in-rats
#2
Tracy Cheung, Juyoung Park, Deborah Lee, Catherine Kim, Jeffrey Olson, Shadi Javadi, Gregory Lawson, James McCabe, Won Moon, Kang Ting, Christine Hong
INTRODUCTION: Although current techniques for accelerated tooth movement often involve invasive surgical procedures, micro-osteoperforations (MOPs) using mini-implants may facilitate orthodontic tooth movement without raising flaps, reduce surgical risks, and increase patient acceptance. In this study, we evaluated the effectiveness of mini-implant-facilitated MOPs in inducing accelerated tooth movement and investigated the potential risks for root resorption. METHODS: Five MOPs were placed on the left side around the maxillary first molars in 6 rats using an automated mini-implant driver, whereas the right side received no MOPs as the control...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27882108/effects-of-piezosurgery-in-accelerating-the-movement-of-orthodontic-alveolar-bone-tooth-of-rats-and-the-expression-mechanism-of-bmp-2
#3
Jinyou Han, Hong He
The aim of the study was to investigate the effects of piezosurgery in accelerating the movement of orthodontic alveolar bone tooth of rats and the expression mechanism of bone morphogenetic protein-2 (BMP-2). Adult male Wistar rats (n=30), with an age range of 14-15 weeks, and an average weight of 250±16 g were used. The animals were randomly divided into the control and observation groups. The rats in the control group were injected with 25-dihydroxyvitamin (1,25-dihydroxycholecalciferol) into their dental ligament...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27876452/comparison-of-excursive-occlusal-force-parameters-in-post-orthodontic-and-non-orthodontic-subjects-using-t-scan%C3%A2-iii
#4
Sarah Qadeer, Ahmed A Abbas, Lertrit Sarinnaphakorn, Robert B Kerstein
OBJECTIVE: Published studies indicate that orthodontically treated patients demonstrate increased posterior occlusal friction contributing to temporomandibular disorder (TMD) symptoms. This study investigated measured excursive movement occlusal contact parameters and their association with TMD symptoms between non- and post-orthodontic subjects. METHODS: Twenty-five post-orthodontic and 25 non-orthodontic subjects underwent T-Scan® computerized occlusal analysis to determine their disclusion time (DT), the excursive frictional contacts, and occlusal scheme...
November 23, 2016: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/27869476/low-level-laser-therapy-effectiveness-in-accelerating-orthodontic-tooth-movement-a-randomized-controlled-clinical-trial
#5
Mohammad Moaffak A AlSayed Hasan, Kinda Sultan, Omar Hamadah
OBJECTIVE: To evaluate the effectiveness of low-level laser therapy (LLLT) in accelerating orthodontic tooth movement of crowded maxillary incisors. MATERIALS AND METHODS: This two-arm, parallel-group, randomized controlled trial involved 26 patients with severe to extreme maxillary incisors irregularity according to Little's irregularity index, indicating two first premolars extraction. Patients were randomly assigned to either the laser group or the control group (13 each)...
November 21, 2016: Angle Orthodontist
https://www.readbyqxmd.com/read/27843261/autotransplantation-of-a-strange-positioned-impacted-central-incisor-in-a-surgically-prepared-socket-a-miracle-esthetic-concept
#6
Chandresh Jaiswara, Vinay K Srivastava, Neeraj Dhiman
: Esthetics is a prime concern for a young lady. Any anomaly in the anterior tooth may create anxiety and depression. This anxiety and depression may hamper her married life and overall personality. This case report reveals an unerupted right central incisor situated in a strange position, creating space in the maxillary anterior region and giving an unesthetic appearance. Autotransplantation is a method of choice for a strangely positioned impacted central incisor in a new appropriate site...
July 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27796672/three-consecutive-days-of-application-of-led-therapy-is-necessary-to-inhibit-experimentally-induced-root-resorption-in-rats-a-microtomographic-study
#7
Dayla Thyeme Higashi, Avacir Casanova Andrello, Pedro Marcelo Tondelli, Dari de Oliveira Toginho Filho, Solange de Paula Ramos
Previous studies have suggested that phototherapy may modulate orthodontic tooth movement and the incidence of root resorption. We aimed to identify a minimal dose-response relationship to LED therapy with regard to orthodontic tooth movement (OTM) and root resorption in rats. Forty-eight male Wistar rats were divided into six groups with equal and random distribution: control (C) no intervention; three daily LED irradiation (CLED); submitted only to OTM (RR); OTM and LED irradiation on the first day (LED1); OTM and two LED irradiation on the first and second days (LED2); and OTM and three LED irradiation on the first, second, and third days (LED3)...
October 29, 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27769958/age-related-effects-on-osteoclastic-activities-after-orthodontic-tooth-movement
#8
X Li, M Li, J Lu, Y Hu, L Cui, D Zhang, Y Yang
OBJECTIVES: To elucidate the effects of age on the expression levels of the receptor activator of the nuclear factor-κB ligand (RANKL) and osteoclasts in the periodontal ligament during orthodontic mechanical loading and post-orthodontic retention. MATERIALS AND METHODS: The study included 20 male Sprague-Dawley rats, ten in the young group (aged four to five weeks) and ten in the adult group (aged 18 to 20 weeks). In each rat, the upper-left first molar was subjected to a seven-day orthodontic force loading followed by a seven-day retention period...
October 2016: Bone & Joint Research
https://www.readbyqxmd.com/read/27766484/bone-density-and-dental-external-apical-root-resorption
#9
REVIEW
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...
December 2016: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/27761668/decrowding-of-lower-anterior-segment-with-and-without-photobiomodulation-a-single-center-randomized-clinical-trial
#10
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
https://www.readbyqxmd.com/read/27761588/post-treatment-changes-in-permanent-retention
#11
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
https://www.readbyqxmd.com/read/27748817/release-from-optimal-compressive-force-suppresses-osteoclast-differentiation
#12
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
https://www.readbyqxmd.com/read/27733713/pain-and-tissue-damage-in-response-to-orthodontic-tooth-movement-are-they-correlated
#13
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
https://www.readbyqxmd.com/read/27731649/characterization-of-the-coatings-covering-esthetic-orthodontic-archwires-and-their-influence-on-the-bending-and-frictional-properties
#14
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
https://www.readbyqxmd.com/read/27704706/computational-design-and-engineering-of-polymeric-orthodontic-aligners
#15
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
https://www.readbyqxmd.com/read/27696311/effectiveness-of-minimally-invasive-surgical-procedures-in-the-acceleration-of-tooth-movement-a-systematic-review-and-meta-analysis
#16
REVIEW
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
https://www.readbyqxmd.com/read/27681936/bone-response-of-loaded-periodontal-ligament
#17
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
https://www.readbyqxmd.com/read/27680969/effects-of-diode-laser-980%C3%A2-nm-on-orthodontic-tooth-movement-and-interleukin-6-levels-in-gingival-crevicular-fluid-in-female-subjects
#18
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...
December 2016: Lasers in Medical Science
https://www.readbyqxmd.com/read/27672630/a-nano-indentation-identification-technique-for-viscoelastic-constitutive-characteristics-of%C3%A2-periodontal-ligaments
#19
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
https://www.readbyqxmd.com/read/27668191/three-dimensional-evaluation-of-tooth-movement-in-class-ii-malocclusions-treated-without-extraction-by-orthodontic-mini-implant-anchorage
#20
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
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