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orthodontic tooth movement

Qinggang Dai, Siru Zhou, Peng Zhang, Xuhui Ma, Nayong Ha, Xiao Yang, Zhifeng Yu, Bing Fang, Lingyong Jiang
As the number of elderly orthodontic patients increases, the impact of postmenopausal osteoporosis on orthodontic tooth movement (OTM) has attracted a great deal of attention because OTM relies on alveolar bone remodeling. The question of whether OTM causes subsequent alveolar bone loss and is harmful to alveolar bone health under osteoporotic conditions remains to be answered. The present study aimed to clarify the influences of OTM on alveolar bone in osteoporotic rats. OTM was accelerated in ovariectomized (OVX) rats as a result of increased bone resorption in the pressure area...
June 20, 2017: Scientific Reports
Hui-Chen Tsai, Chung-Chen Jane Yao, Man-Ying Wong
Early orthodontic tooth movement following regenerative surgery is controversial. In this case, during protraction of the maxillary right first premolar to substitute for the long-term missing maxillary right canine, Bio-Oss and Bio-Gide were used for lateral ridge augmentation at the area of the maxillary right lateral incisor and to cover the denuded surface at the buccal side of the first premolar. Orthodontic tooth movement (OTM) commenced 2 weeks after regenerative surgery. After 8 months, new bone formation was observed on the root surface of the first premolar during implant surgery...
July 2017: International Journal of Periodontics & Restorative Dentistry
Brenda Mertens, Charles Angioni, Valérie Orti, Pierre Canal
INTRODUCTION: Orthodontics in adults must adapt to certain particularities especially related to the decrease or absence of growth and the prevalence of periodontal damage in this population. This review of the literature aims to assess the effects of alveolar corticotomies on accelerating or facilitating tooth movements in different types of orthodontic movements, to compare results obtained by classical technique with those obtained by piezocision and analyze their impact on periodontal tissues in the long term...
June 2017: L' Orthodontie Française
Victor Fau, Dany Diep, Gérard Bader, Damien Brézulier, Olivier Sorel
INTRODUCTION: The number of scientific publications on accelerating orthodontic treatment, and especially surgical alveolar corticotomies techniques, has grown exponentially over the years. The objective of this systematic literature review was to assess the effectiveness of these corticotomies basing on human studies. MATERIAL AND METHOD: The review was conducted from Medline and Web of Science Core Collection to identify prospective controlled clinical trials with duration of orthodontic treatment or the tooth movement rate for primary endpoint...
June 2017: L' Orthodontie Française
Zachary Librizzi, Zana Kalajzic, Daniel Camacho, Sumit Yadav, Ravindra Nanda, Flavio Uribe
OBJECTIVE: To evaluate the effect of corticotomy and corticision, with and without a full mucoperiosteal flap, on the rate of tooth movement and alveolar response in a rat model. MATERIALS AND METHODS: Sixty male, 6-week-old Wistar rats were divided into five groups based on surgical procedure, as follows: control (no tooth movement), orthodontic tooth movement (OTM) only, corticotomy, corticision, and corticision with full mucoperiosteal flap (corticision + flap)...
June 8, 2017: Angle Orthodontist
Carlalberta Verna, Paolo Maria Cattaneo, Michel Dalstra
Objective: To analyze whether the decreased bone density due to the manipulation of bone remodeling rate has an influence on the type of the planned tooth movement. Materials and methods: A finite element model of a lower incisor has been developed. The density of the alveolar bone surrounding the tooth has been assumed to simulate the one occurring after corticotomy to increase tooth movement rate. Moment-to-force ratios corresponding to three different types of movements have been simulated; uncontrolled tipping, translation, and root movement...
June 7, 2017: European Journal of Orthodontics
Marisabel Magnifico, Alberto Di Blasio, Diana Cassi, Chiara Di Blasio, Mauro Gandolfini
Unilateral posterior crossbite often involves only one tooth, especially upper first molar; in these cases it is never easy to obtain an asymmetrical movement of a molar and a proper planning of the orthodontic device with its anchorage is necessary to avoid arch overexpansion. Thanks to its simplicity and efficacy, the modified Quad Helix here described represents a valid therapeutic tool in cases of isolated posterior crossbite.
2017: Case Reports in Dentistry
Juan Zufía, Francesc Abella, Ivan Trebol, Ramón Gómez-Meda
Tooth replacement often leads to inadequate vertical volume in the recipient site bone when a tooth has been extracted because of a vertical root fracture (VRF). This case report presents the autotransplantation of a mandibular third molar (tooth #32) with the attached buccal cortical plate to replace a mandibular second molar (tooth #31) diagnosed with a VRF. After extraction of tooth #31, the recipient socket was prepared based on the size measured in advance with cone-beam computed tomographic imaging. The precise and calculated osteotomy of the cortical bone of tooth #32 allowed for the exact placement of the donor tooth in the position of tooth #31...
June 1, 2017: Journal of Endodontics
Jingtao An, Ying Li, Zhongshuang Liu, Rui Wang, Bin Zhang
The dynamic changes of the microstructure of alveolar bone during orthodontic tooth movement in rats was explored by employing micro-computed tomography (micro-CT) system and to provide theoretical reference for clinical orthodontic treatment. Ten rats were selected randomly as control among 70 adult female Wistar rats, and the other 60 rats were divided into 25-g and 75-g groups of equal number. Orthodontic appliance with force of 25 g and 75 g was installed to perform the molar mesial movement. Microstructural parameters for trabecular bone mesial to the distobuccal root were evaluated at different time points using micro-CT system...
May 2017: Experimental and Therapeutic Medicine
Eun-Kyung Choi, Jae-Hyung Lee, Seung-Hak Baek, Su-Jung Kim
INTRODUCTION: We explored the gene expression profile altered by orthodontic tooth movement (OTM) during the healing of surgical alveolar defects in beagles. METHODS: An OTM-related healing model was established where a maxillary second premolar was protracted into the critical-sized defect for 6 weeks (group DT6). As controls, natural healing models without OTM were set at 2 weeks (group D2) and at 6 weeks (group D6) after surgery. Total RNAs were extracted from dissected tissue blocks containing the regenerated defects and additionally from sound alveolar bone as a baseline (group C)...
June 2017: American Journal of Orthodontics and Dentofacial Orthopedics
Fabian Jäger, James K Mah, Axel Bumann
OBJECTIVE: To quantify treatment-related changes in peridental bone height and thickness in orthodontic patients. MATERIALS AND METHODS: Cone-beam computed tomographs (CBCTs) of 43 patients (24 female, 19 male; mean age: 25 years, 5 months) who underwent orthodontic treatment with multibracket appliances for at least 1 year were chosen for retrospective evaluation. Dehiscence depth and changes in bone width and tooth inclination were determined for 954 teeth. RESULTS: There was a significant decrease in peridental bone height (dehiscence; -0...
May 29, 2017: Angle Orthodontist
Nihat Kılıç, Hüsamettin Oktay
Impacted and transposed teeth cause serious difficulties in tooth eruption and movement as well as esthetic and functional outcomes. Proper treatment planning including good biomechanical control is essential in order to avoid side effects during traction and aligning of the impacted and/or transposed teeth. The purpose of the present study was to present a successfully treated female patient having transposed and impacted lower canines by means of a modified lingual arch and fixed orthodontic appliance. A female patient aged 13 years and 9 months presented to the orthodontic department with a chief compliant of bilateral spacing and missing teeth in mandibular dentition...
2017: Case Reports in Dentistry
Kyung-A Kim, Ji-Won Lee, Jeong-Ho Park, Byoung-Ho Kim, Hyo-Won Ahn, Su-Jung Kim
Facial asymmetry can be classified into the rolling-dominant type (R-type), translation-dominant type (T-type), yawing-dominant type (Y-type), and atypical type (A-type) based on the distorted skeletal components that cause canting, translation, and yawing of the maxilla and/or mandible. Each facial asymmetry type represents dentoalveolar compensations in three dimensions that correspond to the main skeletal discrepancies. To obtain sufficient surgical correction, it is necessary to analyze the main skeletal discrepancies contributing to the facial asymmetry and then the skeletal-dental relationships in the maxilla and mandible separately...
May 2017: Korean Journal of Orthodontics
Sumita Mishra
The paper aims at reviewing the possibilities of orthodontic therapy for paediatric cancer survivors. It is important to understand the fundamental disease, it's treatment protocols, effects on growing skeleton, dental development, oral cavity and oral mucosa, dental caries, bone, orthodontic tooth movement.
March 2017: Journal of Clinical and Diagnostic Research: JCDR
Izabella Lucas de Abreu Lima, Janine Mayra da Silva, Letícia Fernanda Duffles Rodrigues, Davidson Frois Madureira, Angélica Cristina Fonseca, Gustavo Pompermaier Garlet, Mauro Martins Teixeira, Remo Castro Russo, Sandra Yasuyo Fukada, Tarcília Aparecida da Silva
INTRODUCTION: Bone remodeling is a tightly regulated process influenced by chemokines. ACKR2 is a decoy receptor for CC chemokines functioning as regulator of inflammatory response. In this study we investigated whether the absence of ACKR2 would affect bone phenotype and remodeling induced by mechanical loading. METHODS: An orthodontic appliance was placed between incisors and first molar of ACKR2 deficient (ACKR2(-/-)) and C57BL6/J (wild-type/WT) mice. Microtomography, histology and qPCR were performed to evaluate bone parameters, orthodontic tooth movement (OTM), bone cells counts and the expression of ACKR2, bone remodeling markers, CC chemokines and chemokines receptors...
May 3, 2017: Bone
Ming-He Li, Yang Wang, Nan-Nan Liao, Jin-Yuan Li, Qing Dong
PURPOSES: To observe the expression and distribution of TGF-β1 in periodontal tissue under intervention of Strontium ranelate and Qianggu capsule during orthodontic tooth movement in rats, and explore the efficacy of the 2 drugs. METHODS: Seventy male SD rats of 3 months old were selected in the study, and randomly divided into control group, model control group, Strontium ranelate group, Qianggu capsule group, each group had 15 animals. Retinoic acid was given by gavage to animals in the control group, Strontium ranelate group, Qianggu capsule group for 2 weeks, and bone density was detected to determine successful establishment of osteoporosis model...
February 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
Shao-Yue Zhu, Chang-Yong Yuan, Zong-Xiang Liu, Xiao-Ming Li, Peng-Lai Wang
PURPOSE: To study the influences of corticotomy on orthodontic tooth movement (OTM) and the underlying mechanism in rats. METHODS: Forty-eight female Sprague-Dawley rats were randomly assigned to corticotomy group (Cort, 24 rats) or sham-corticotomy group (Sham, 24 rats). All rats were subjected OTM after corticotomy or sham surgery. 6 rats of each group were sacrificed at 0, 1, 3 and 7 day of OTM. OTM were measured with an electronic digital caliper. Osteoclasts were counted in pressure side with TRAP...
February 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
Tamizhmani Jayachandran, Bhadrinath Srinivasan, Sridevi Padmanabhan
OBJECTIVES: To assess and compare the concentration of leptin in saliva between normal weight and overweight individuals and to evaluate the rate of orthodontic tooth movement. MATERIALS AND METHODS: Thirty female subjects were divided into two groups: I (normal weight) and II (overweight group) based on their body mass index. All subjects underwent fixed appliance therapy requiring upper first premolar extraction and distal movement of the canine. Distal force was applied to the maxillary right canine using active lacebacks...
May 4, 2017: Angle Orthodontist
Prashant Babaji, Raghu Devanna, Kiran Jagtap, Vishwajit Rampratap Chaurasia, Jeethu John Jerry, Basanta Kumar Choudhury, Dinesh Duhan
Resorptive cells are responsible for the resorption of mineralized matrix of hard tissues. Bone-resorbing cells are called osteoclasts; however, they can resorb mineralized dental tissues or calcified cartilage and then they are called odontoclasts and chondroclasts, respectively. Resorptive cells form when mononuclear precursors derived from a monocyte-macrophage cell lineage are attracted to certain mineralized surfaces and subsequently fuse and adhere onto them for exerting their resorbing activity. These cells are responsible for degradation of calcified extracellular matrix composed of organic molecules and hydroxyapatite...
April 2017: Annals of African Medicine
Jason W Morris, Phillip M Campbell, Larry P Tadlock, Jimmy Boley, Peter H Buschang
INTRODUCTION: This study was designed to evaluate the long-term prevalence of gingival recession after orthodontic tooth movements, focusing on the effects of mandibular incisor proclination and expansion of maxillary posterior teeth. METHODS: Records of 205 patients (162 female, 43 male) were obtained from 2 private practice orthodontists. Using pretreatment (age, 14.0 ± 5.9 years) and posttreatment (age, 16.5 ± 6.0 years) lateral cephalograms and dental models, mandibular incisor proclination and maxillary arch widths were measured...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
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