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orthodontic tooth movement

S Kutalmış Buyuk, Mustafa C Yavuz, Esra Genc, Oguzhan Sunar
This clinical case report presents fixed orthodontic treatment of a patient with moderately crowded teeth. It was performed with a new technique called 'discision'. Discision method that was described for the first time by the present authors yielded predictable outcomes, and orthodontic treatment was completed in a short period of time. The total duration of orthodontic treatment was 4 months. Class I molar and canine relationships were established at the end of the treatment. Moreover, crowding in the mandible and maxilla was corrected, and optimal overjet and overbite were established...
February 2018: Saudi Medical Journal
Xiaoyan Chen, Yuan Liu, Wanghui Ding, Jiejun Shi, Shenglai Li, Yali Liu, Mengjie Wu, Huiming Wang
Severe malocclusion can contribute to several serious dental and physical conditions, such as digestive difficulties, periodontal disease, and severe tooth decay. Orthodontic treatment is mainly used to treat malocclusion. Forces in orthodontic tooth results in bone resorption on the pressure side and bone deposition on the tension side. Osteoblasts have been considered as the key component in bone regeneration on the tension side. However, the underlying mechanisms remain unclear. In this study, we focus on how mechanical stretch regulates the osteogenesis during orthodontic treatment...
February 12, 2018: Cell Death & Disease
Emmanuel Chan, Oyku Dalci, Peter Petocz, Alexandra K Papadopoulou, M Ali Darendeliler
INTRODUCTION: Studies have demonstrated the potential efficacy of micro-osteoperforations in accelerating tooth movement by amplifying the expression of inflammatory markers. The aim of this investigation was to examine the effects of micro-osteoperforations on orthodontic root resorption with microcomputed tomography. METHODS: This prospective controlled clinical trial involved 20 subjects requiring extraction of the maxillary first premolars as part of their orthodontic treatment...
February 2018: American Journal of Orthodontics and Dentofacial Orthopedics
Hidemi Gunji, Ryo Kunimatsu, Yuji Tsuka, Yuki Yoshimi, Keisuke Sumi, Tetsuya Awada, Kengo Nakajima, Aya Kimura, Tomoka Hiraki, Naoto Hirose, Makoto Yanoshita, Kotaro Tanimoto
BACKGROUND AND OBJECTIVES: Tooth movement during orthodontic treatment is associated with bone neoplasticity and bone resorption on the tension and pressure sides. Previous clinical studies have suggested that low-power laser irradiation can accelerate tooth movement during orthodontic treatment, although the underlying mechanism remains unclear. In this study, we used a high-frequency near-infrared diode laser that generates less heat and examined the histologic changes in periodontal tissue during experimental tooth movement with laser irradiation...
February 5, 2018: Lasers in Surgery and Medicine
Qin Hu, Jianping Zhou, Xiaolin Xu, Hongwei Dai
BACKGROUND: While different levels of root resorption may occur in orthodontic treatment, several preventive approaches have been reported. Nevertheless, little is known about the effect of enamel matrix derivative (EMD) on root repair during orthodontic tooth movement. OBJECTIVE: To evaluate the effect of EMD on root resorption repair following the application of orthodontic force. MATERIALS AND METHODS: A force of 100 g was exerted for 14 days on the left maxillary first molars of twenty 10-week-old Sprague-Dawley rats divided into the EMD and control groups (n = 10 per group)...
February 2, 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
A P S Gil, O L Haas, I Méndez-Manjón, J Masiá-Gridilla, A Valls-Ontañón, F Hernández-Alfaro, R Guijarro-Martínez
INTRODUCTION: It has been suggested that alveolar corticotomies may accelerate tooth movement, broaden the scope of malocclusion types that can be treated orthodontically, decrease the need for extractions, and support long-term stability. Several techniques have been proposed, although the indications, ideal design and technical characteristics, potential complications, and objective clinician and patient satisfaction remain unclear. This systematic review aimed to provide scientific support to validate alveolar corticotomies as a reliable approach to accelerated orthodontics...
January 8, 2018: Journal of Cranio-maxillo-facial Surgery
Yuanyuan Han, Xuxia Wang, Dan Ma, Xiaoxiao Wu, Panpan Yang, Jun Zhang
Objectives: This study was performed to investigate the effects and mechanism of ipriflavone (IP) on the proliferation and osteoblastic differentiation of periodontal ligament cells in vitro and periodontal tissue remodeling following orthodontic tooth movement (OTM) in vivo. Materials and methods: Human periodontal ligament cells (hPDLCs) were cultured in vitro and cell counting kit-8, alkaline phosphatase (ALP) activity assay, plate clone formation assay, and alizarin red staining were used to test proliferation and osteogenic differentiation of hPDLCs...
2018: Drug Design, Development and Therapy
Soraia Macari, Lavanya A Sharma, Amanda Wyatt, Janine Maíra da Silva, George J Dias, Tarcília A Silva, Raphael E Szawka, David R Grattan
The underlying causes of maxillary bone loss during lactation remain poorly understood. We evaluated the impact of lactation on physiological and mechanically-induced alveolar bone remodeling. Nulliparous non-lactating (N-LAC) and 21-day lactating (LAC) mice underwent mechanically-induced bone remodeling by orthodontic tooth movement (OTM). Micro-computed tomography (microCT) was performed in the maxilla, femur and vertebra. Tartrate-resistant-acid phosphatase (TRAP) and Masson's trichrome labelling was performed in the maxillary bone and gene expression was determined in the periodontal ligament...
January 27, 2018: Bone
Eduardo Franzotti Sant'Anna, Mônica Tirre de Souza Araújo, Lincoln Issamu Nojima, Amanda Carneiro da Cunha, Bruno Lopes da Silveira, Mariana Marquezan
INTRODUCTION: In dental practice, low-level laser therapy (LLLT) and high-intensity laser therapy (HILT) are mainly used for dental surgery and biostimulation therapy. Within the Orthodontic specialty, while LLLT has been widely used to treat pain associated with orthodontic movement, accelerate bone regeneration after rapid maxillary expansion, and enhance orthodontic tooth movement, HILT, in turn, has been seen as an alternative for addressing soft tissue complications associated to orthodontic treatment...
November 2017: Dental Press Journal of Orthodontics
Baiyu Sun, Yong Wen, Xuan Wu, Yunpeng Zhang, Xu Qiao, Xin Xu
Orthodontic tooth movement (OTM) is a periodontal tissue remodeling and regeneration process that is caused by bio-mechanical stimulation. This mechanical-chemical transduction process involves a variety of biological factors and signaling pathways. It has been shown that the Hippo-YAP/TAZ signaling pathway plays a pivotal role in the mechanical-chemical signal transduction process. Moreover, YAP and TAZ proteins interact with RUNX family proteins via different mechanisms. To explore the regulation of the Hippo signaling pathway during periodontal tissue remodeling, we examined the upper first molar OTM model in rats...
January 22, 2018: Journal of Molecular Histology
Sang Su An, Yoon Jeong Choi, Ji Young Kim, Chooryung J Chung, Kyung-Ho Kim
OBJECTIVES: To investigate the incidence of and contributing factors to open gingival embrasures between the central incisors after orthodontic treatment. MATERIALS AND METHODS: One hundred posttreatment patients (29 men and 71 women; mean age, 24.7 years) were divided retrospectively into occurrence and nonoccurrence groups based on intraoral photographs. Based on the severity, the occurrence group was further divided into mild, moderate, and severe groups. Parameters from periapical radiographs, superimposed lateral cephalograms, and study models were compared between the occurrence and the nonoccurrence groups by using independent t-tests and were also analyzed on the basis of severity via analysis of variance...
January 16, 2018: Angle Orthodontist
Antonis Chaniotis
INTRODUCTION: Although regenerative treatment approaches in teeth with incomplete root formation and pulp necrosis have become part of the suggested therapeutic endodontic spectrum, little is known about the effect of orthodontic movement in the tissue that has been regenerated. Furthermore, as the number of adults undergoing orthodontic treatment increases, there is an increasing need to investigate the changes that these tissues may undergo during orthodontic movement. Here we describe the alterations observed after the application of orthodontic forces in a case of an apically root-fractured necrotic immature root that had been managed with regenerative endodontic procedures in the past...
January 3, 2018: Journal of Endodontics
Wenwen Yu, Yi Zheng, Zhujun Yang, Hongbo Fei, Yang Wang, Xu Hou, Xinhua Sun, Yuqin Shen
Rare therapeutic genes or agents are reported to control orthodontic bone remodeling. MicroRNAs have recently been associated with bone metabolism. Here, we report the in vitro and in vivo effects of miR-34a on osteogenic differentiation under orthodontic force using an N-acetyl-L-leucine-modified polyethylenimine (N-Ac-l-Leu-PEI) carrier. N-Ac-l-Leu-PEI exhibited low cytotoxicity and high miR-34a transfection efficiency in rat bone mineral stem cells and local alveolar bone tissue. After transfection, miR-34a enhanced the osteogenic differentiation of Runx2 and ColI, Runx2 and ColI protein levels, and early osteogenesis function under orthodontic strain in vitro...
December 15, 2017: Oncotarget
Allahyar Geramy, Tabassom Hooshmand, Tahura Etezadi
Objectives: The friction between the brackets and orthodontic wire during sliding mechanics inflicts difficulties such as decreasing the applied force and tooth movement and also the loss of anchorage. Therefore, many studies have focused on the factors that affect the friction. The purpose of this study was to assess the effect of 0.05% sodium fluoride mouthwash on the friction between orthodontic brackets and wire. Materials and Methods: Four types of orthodontic wires including rectangular standard stainless steel (SS), titanium molybdenum alloy (TMA), nickel-titanium (NiTi) and copper-nickel-titanium (Cu-NiTi) were selected...
September 2017: Journal of Dentistry of Tehran University of Medical Sciences
Nilüfer İrem Tunçer, Ayça Arman-Özçırpıcı, Bahar Füsun Oduncuoğlu, Alpdoğan Kantarcı
Piezoelectric surgery is a novel surgical approach used in orthodontic treatment for rapid tooth movement. This paper presents a case series wherein osseous outgrowths were observed in response to piezosurgery-assisted en-masse retraction. Sixteen patients requiring upper premolar extractions were treated with miniscrew-supported en-masse retraction and received minimally invasive decortication via piezosurgery. Computed tomography (CT) of the maxillary anterior region was performed to investigate the nature of the outgrowths...
January 2018: Korean Journal of Orthodontics
James K Hartsfield, George Jeryn Jacob, Lorri Ann Morford
Uncovering the genetic factors that correlate with a clinical deviation of previously unknown etiology helps to diminish the unknown variation influencing the phenotype. Clinical studies, particularly those that consider the effects of an appliance or treatment regimen on growth, need to be a part of these types of genetic investigations in the future. While the day-to-day utilization of "testing" for genetic factors is not ready for practice yet, genetic testing for monogenic traits such as Primary Failure of Eruption (PFE) and Class III malocclusion is showing more promise as knowledge and technology advances...
December 2017: Seminars in Orthodontics
Viviane Jettar, Marcelo Napimoga, Fabiana Freitas, Juliana Clemente-Napimoga, Selly Suzuki, Victor Montalli, Aguinaldo Garcez
Orthodontic tooth movement is based on mechanical forces inducing bone remodeling and several methods have been proposed to increase tooth movement, including photobiomodulation. This study evaluated, in an animal model, the effects of photobiomodulation on SOFAT - a secreted osteoclastogenic factor of activated T cells and RANK-L during tooth movement. The results showed that tooth displacement, RANK-L and SOFAT levels were significantly greater compared to control group. SOFAT may play an important role in bone remodeling during orthodontic movement, possibly increasing the osteoclast cells at the compression area and bone remodeling activity...
December 23, 2017: Photochemistry and Photobiology
Graciela J Barreda, Elizabeth A Dzierewianko, Karina A Muñoz, Gisela I Piccoli
Orthodontic treatments with Invisalign® require the use of attachments, which are composite resin buttons attached to tooth surfaces. Attachments constitute one of the most powerful tools for improving the efficiency of orthodontic tooth movement. The main purpose of this study was to evaluate surface wear over six months in two resin composites (Filtek Z350 XT, 3MESPE and Amelogen Plus TW, Ultradent Products Inc. ) used for making Invisalign® attachments. These composites were selected for their esthetic and mechanical properties...
August 2017: Acta Odontológica Latinoamericana: AOL
V Thumbigere-Math, A Alqadi, N I Chalmers, M B Chavez, E Y Chu, M T Collins, C R Ferreira, K FitzGerald, R I Gafni, W A Gahl, K S Hsu, M S Ramnitz, M J Somerman, S G Ziegler, B L Foster
Mineralization of bones and teeth is tightly regulated by levels of extracellular inorganic phosphate (Pi) and pyrophosphate (PPi). Three regulators that control pericellular concentrations of Pi and PPi include tissue-nonspecific alkaline phosphatase (TNAP), progressive ankylosis protein (ANK), and ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1). Inactivation of these factors results in mineralization disorders affecting teeth and their supporting structures. This study for the first time analyzed the effect of decreased PPi on dental development in individuals with generalized arterial calcification of infancy (GACI) due to loss-of-function mutations in the ENPP1 gene...
December 1, 2017: Journal of Dental Research
Mostafa Shahabi, Soheil Salari, Maryam Poosti, Mostafa Abtahi
Background: During sliding mechanics, the frictional force (FF) is an important counterforce to orthodontic tooth movement. The purpose of this in vitro study was to investigate the static and kinetic FFs of S silica-insert ceramic (SIC) brackets with Teflon-coated (TC) and conventional S stainless steel (SS) archwires. Materials and Methods: The target group of this study included 80 maxillary canine 0.022 inch slot SIC brackets. Forty SS brackets were used as the control...
November 2017: Dental Research Journal
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