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https://www.readbyqxmd.com/read/29154676/effects-of-bone-regeneration-materials-and-tooth-movement-timing-on-canine-experimental-orthodontic-treatment
#1
Ferdinand Mabula Machibya, Yiyuan Zhuang, Weizhong Guo, Dongdong You, Shan Lin, Dong Wu, Jiang Chen
OBJECTIVES: To evaluate the effects of bone regeneration materials and orthodontic tooth movement (OTM) timing on tooth movement through alveolar bone defects treated with guided bone regeneration (GBR) utilizing xenografts (Bio-Oss) and alloplast (β-TCP). MATERIALS AND METHODS: Twenty-four standard alveolar bone defects in six male beagle dogs were treated by GBR using either Bio-Oss or β-TCP (experimental), whereas the control defects were left empty. The defects were further grouped into early or late subgroups, depending on OTM timing after GBR (ie 1 month or 2 months, respectively)...
November 20, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29150664/histological-evidence-for-a-dynamic-dental-battery-in-hadrosaurid-dinosaurs
#2
Katherine Bramble, Aaron R H LeBlanc, Denis O Lamoureux, Mateusz Wosik, Philip J Currie
The first histological study of an entire hadrosaurid dental battery provides a comprehensive look at tooth movement within this complex structure. Previous studies have focused on isolated teeth, or in-situ batteries, but this is the first study to examine an entire dental battery of any dinosaur. The absence of direct tooth-to-tooth contact across the entire battery and a unique arrangement of the dental tissues in hadrosaurids led us to compare their teeth with the ever-growing incisors of mammals. The similarity in the distributions of tissues along the incisor, coupled with continuous eruption, make for helpful comparisons to hadrosaurid teeth...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150379/changes-in-maxillofacial-morphology-and-velopharyngeal-function-with-two-stage-maxillary-distraction-mandibular-setback-surgery-in-patients-with-cleft-lip-and-palate
#3
T Susami, Y Mori, K Ohkubo, M Takahashi, Y Hirano, H Saijo, T Takato
Maxillary distraction is increasingly used for the correction of severe maxillary retrusion in patients with cleft lip and palate. However, control of the maxillary movement is difficult, and the need to wear visible distractors for a long period of time causes psychosocial problems. A two-stage surgical approach consisting of maxillary distraction and mandibular setback was developed to overcome these problems. In this study, changes in maxillofacial morphology and velopharyngeal function were examined in 22 patients with cleft lip and palate who underwent this two-stage approach...
November 14, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29149622/the-chemokine-receptor-type-4-antagonist-amd3100-interrupts-experimental-tooth-movement-in-rats
#4
Kasumi Hatano, Yuji Ishida, Hiroyuki Yamaguchi, Jun Hosomichi, Jun-Ichi Suzuki, Risa Usumi-Fujita, Yasuhiro Shimizu, Naoki Shibutani, Sawa Kaneko, Takashi Ono
OBJECTIVE: The aim of this study was to clarify the role of the stromal cell-derived factor-1 (SDF-1)/C-X-C chemokine receptor type 4 (CXCR4) axis in osteoclast accumulation, and the influence of orthodontic tooth movement (OTM) under mechanical force application to periodontal tissues, by administration of the CXCR4 antagonist AMD3100. DESIGN: The upper right first molar (M1) of rats was moved mesially with a 10-g force titanium-nickel closed coil spring. Rats were treated with phosphate-buffered saline or AMD3100 (5mg/kg), which is a SDF-1 antagonist...
November 11, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29138812/expression-and-regulation-of-the-erk1-2-and-p38-mapk-signaling-pathways-in-periodontal-tissue-remodeling-of-orthodontic-tooth-movement
#5
Liping Jiang, Zhen Tang
The present study aimed to investigate the expression and regulation of extracellular signal‑regulated kinase (ERK)1/2 and p38 mitogen‑activated protein kinase (MAPK) signaling pathways in periodontal tissue remodeling of orthodontic tooth movement. Sprague Dawley rats with orthodontic tooth movement were generated. After tension stress for 1, 3, 5, 7 and 14 days, the protein and mRNA expression levels of ERK1/2 and p38 in periodontal tissue were determined by western blotting and reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR), respectively...
November 10, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29135737/effect-of-long-term-use-of-facemask-with-miniplate-on-maxillary-protraction-in-patients-with-cleft-lip-and-palate
#6
Sung Woon On, Seung-Hak Baek, Jin-Young Choi
The purpose of this retrospective study was to investigate the effect of a long-term use of facemask with miniplate (FM-MP) on maxillary protraction in cleft lip and palate (CLP) patients. The subjects were 21 CLP patients (16 unilateral CLP and 5 bilateral CLP patients), who were treated with identical lip and palate surgical method and FM-MP therapy performed by single surgeon and single orthodontist. Lateral cephalogram was taken before (T1; mean age, 11.1 years) and after maxillary protraction (T2; mean age, 16...
November 9, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29134672/quantitative-aspects-of-the-ruminating-process-in-giraffes-giraffa-camelopardalis-fed-with-different-diets
#7
Dominik Schüßler, Hartmut Greven
Giraffes are ruminants feeding on fresh browse and twigs in the wild, but in zoos, their diet is mainly based on alfalfa hay, grains, and pellets occasionally supplemented by twigs and foliage. These diets, which differ in composition and digestibility, affect the behavior of the animals, tooth wear patterns, and chewing efficiency. We quantified several parameters of the rumination process in ten zoo housed giraffes of different sexes and ages fed either with alfalfa hay, fresh browse, or a combination of both...
November 14, 2017: Zoo Biology
https://www.readbyqxmd.com/read/29134232/skeletally-anchored-mesialization-of-molars-using-digitized-casts-and-two-surface-matching-approaches-analysis-of-treatment-effects
#8
Kathrin Becker, Benedict Wilmes, Chantal Grandjean, Sivabalan Vasudavan, Dieter Drescher
PURPOSE: To (1) quantify the three-dimensional treatment effect of a Mesialslider appliance using superimposed digital models, (2) to evaluate anchorage loss (measured by incisor displacement), and (3) to assess agreement between two different matching approaches, i.e., control point (CP)-based and iterative closest point (ICP) matching. METHODS: In a retrospective study, the effects of a skeletally anchored uni- and bilateral mesialization appliance (Mesialslider) as well as simultaneous mesialization and distalization appliance (Mesio-Distalslider) were evaluated in 48 subjects (aged 11-53 years)...
November 13, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29130127/predictability-of-orthodontic-movement-with-orthodontic-aligners-a-retrospective-study
#9
Luca Lombardo, Angela Arreghini, Fabio Ramina, Luis T Huanca Ghislanzoni, Giuseppe Siciliani
BACKGROUND: The aim of this study was to evaluate the predictability of F22 aligners (Sweden & Martina, Due Carrare, Italy) in guiding teeth into the positions planned using digital orthodontic setup. METHODS: Sixteen adult patients (6 males and 10 females, mean age 28 years 7 months) were selected, and a total of 345 teeth were analysed. Pre-treatment, ideal post-treatment-as planned on digital setup-and real post-treatment models were analysed using VAM software (Vectra, Canfield Scientific, Fairfield, NJ, USA)...
November 13, 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/29130047/bending-properties-of-fiber-reinforced-composites-retainers-bonded-with-spot-composite-coverage
#10
Maria Francesca Sfondrini, Paola Gandini, Paola Tessera, Pekka K Vallittu, Lippo Lassila, Andrea Scribante
Orthodontic and periodontal splints are prepared with round or flat metallic wires. As these devices cannot be used in patients with allergy to metals or with aesthetic demands, fiber-reinforced composite (FRC) retainers have been introduced. Stiffness of FRC materials could reduce physiologic tooth movement. In order to lower rigidity of conventional FRC retainers, a modified construction technique that provided a partial (spot) composite coverage of the fiber has been tested and compared with metallic splints and full-bonded FRCs...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29128199/local-injection-of-carrageenan-accelerates-orthodontic-tooth-movement-a-preliminary-experimental-animal-study
#11
Samira Kavoli, Maysam Mirzaie, Farideh Feizi, Vahid Rakhshan, Valiollah Arash, Ali Bijani
BACKGROUND: Orthodontic tooth movement (OTM) can be accelerated by increasing bone turnover. Carrageenan is a common food additive, which can induce inflammation. Hence, it might accelerate OTM. However, it has not been investigated to date. METHODS: This 2-phase preliminary animal experimental study was conducted on 28 Wistar rats. A pilot study on 5 mice was done to estimate the experimental dose of carrageenan. The first phase evaluated the effect of a 40μL carrageenan 1% injection on inflammation status in 7 rats versus 7 control rats, 6hours after the injection...
November 8, 2017: International Orthodontics
https://www.readbyqxmd.com/read/29116140/valid-gene-expression-normalization-by-rt-qpcr-in-studies-on-hpdl-fibroblasts-with-focus-on-orthodontic-tooth-movement-and-periodontitis
#12
Christian Kirschneck, Sarah Batschkus, Peter Proff, Josef Köstler, Gerrit Spanier, Agnes Schröder
Meaningful, reliable and valid mRNA expression analyses by real-time quantitative PCR (RT-qPCR) can only be achieved, if suitable reference genes are chosen for normalization and if appropriate RT-qPCR quality standards are met. Human periodontal ligament (hPDL) fibroblasts play a major mediating role in orthodontic tooth movement and periodontitis. Despite corresponding in-vitro gene expression studies being a focus of interest for many years, no information is available for hPDL fibroblasts on suitable reference genes, which are generally used in RT-qPCR experiments to normalize variability between samples...
November 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29114332/molar-uprighting-a-considerable-and-safe-decision-to-avoid-prosthetic-treatment
#13
Taísa Boamorte Raveli, Dirceu Barnabé Raveli, Kelei Cristina de Mathias Almeida, Ary Dos Santos Pinto
Background: Tipped lower molar over edentulous space is very common in orthodontics practice when adults seek treatment. The segmented arch technique features a predictable force system that provides a controlled release of force that can produce light and continuous tooth movement. Case Description: A female adult patient, who lost a permanent lower first molar, needed correction of the position of her permanent first molar place. Instead of making space for rehabilitation, it was closed after second molar uprighting and a balanced interdigitation was created without prosthetics...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/29109336/corrosion-resistance-and-mechanical-properties-of-titanium-nitride-plating-on-orthodontic-wires
#14
Haruki Sugisawa, Hideki Kitaura, Kyosuke Ueda, Keisuke Kimura, Masahiko Ishida, Yumiko Ochi, Akiko Kishikawa, Saika Ogawa, Teruko Takano-Yamamoto
Titanium nitride (TiN) coating by ion plating has properties such as high hardness, wear resistance, corrosion resistance, and surface lubricity, therefore TiN coating is often used in various dental appliances and materials. In this study, we evaluated the corrosion behaviors and mechanical properties of TiN coated stainless steel (SS) and nickel titanium (Ni-Ti) orthodontic wires prepared by ion plating. TiN coating by ion plating improves the corrosion resistance of orthodontic wires. The corrosion pitting of the TiN coated wire surface become small...
November 3, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29108500/breastfeeding-and-oral-health-evidence-and-methodological-challenges
#15
K G Peres, B W Chaffee, C A Feldens, C Flores-Mir, P Moynihan, A Rugg-Gunn
Breastfeeding is a powerful health-promoting behavior. A 2016 Lancet global collaboration to review the health implications of breastfeeding was among the first to consider oral health outcomes. While a role was suggested for breastfeeding in preventing malocclusion, caries was the only included disease condition unfavorably associated with breastfeeding. The present critical review examines the evidence connecting breastfeeding practices to these outcomes and discusses the methodological challenges inherent in reaching causal conclusions...
November 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29104942/cone-beam-computed-tomography-analysis-in-3d-position-of-maxillary-denture
#16
Ying Jia, Hua Yang, Ping Li, Jiangyan Xiong, Bo Chen
The dynamic correlation between teeth and denture morphology as well as the morphological positions needs to be explored. Methodology: 63 adult patients with skeletal class III malocclusions that met the inclusion criteria were enrolled and imaged with Cone Beam Computed Tomography (CBCT), and Digital Imaging and Communications in Medicine (DICOM) data were collected. The torque angle and axial inclination were measured and analyzed for the corona, root, and entire body of every tooth on the maxilla...
2017: Open Medicine (Warsaw, Poland)
https://www.readbyqxmd.com/read/29104396/treatment-of-maxillary-impacted-canine-using-ballista-spring-and-orthodontic-wire-traction
#17
Pradeep Raghav, Kanika Singh, C Munish Reddy, Divya Joshi, Shalu Jain
In orthodontic practice, impaction of maxillary permanent canines is a frequently encountered clinical problem. After the third molar, the canine is the most frequently impacted tooth. For functional occlusion, bringing the impacted canine into occlusion is important to achieve final esthetic in orthodontic practice. This article illustrates a distinct case in which the three permanent canines maintained their unerupted status till the age of 18 years. The three impacted canines were surgically exposed, attachment bonded, traction given with ballista spring for vertical and labial movement, and ideally positioned with fixed orthodontic mechanotherapy...
July 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29103443/protein-and-mrna-expressions-of-il-6-and-its-key-signaling-factors-under-orthodontic-forces-in-mice-an-in-vivo-study
#18
Yi Liu, Fang Song, Shu Wu, Shushu He, Mingmei Meng, Chunxiao Lv, Qingqing Yang, Song Chen
INTRODUCTION: The purpose of this study was to investigate the mechanical loading-induced changes in protein and mRNA expressions of interleukin-6 (IL-6) and its key signaling factors glycoprotein 130 (gp130), signal transducer and activator of transcription 3 (STAT3), and the Src homology phosphotyrosine phosphatase (SHP2) at the tension and compression sides of the teeth in mouse models. METHODS: A total of 55 C57B/6 mice (10 weeks old) were divided into 3 groups...
November 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29103440/effects-of-low-level-laser-irradiation-on-the-rate-of-orthodontic-tooth-movement-and-associated-pain-with-self-ligating-brackets
#19
Irfan Qamruddin, Mohammad Khursheed Alam, Verda Mahroof, Mubassar Fida, Mohd Fadhli Khamis, Adam Husein
INTRODUCTION: The aim of this study was to evaluate the effect of low-level laser irradiation applied at 3-week intervals on orthodontic tooth movement and pain associated with orthodontic tooth movement using self-ligating brackets. METHODS: Twenty-two patients (11 male, 11 female; mean age, 19.8 ± 3.1 years) with Angle Class II Division 1 malocclusion were recruited for this split-mouth clinical trial; they required extraction of maxillary first premolars bilaterally...
November 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29103438/numeric-simulation-model-for-long-term-orthodontic-tooth-movement-with-contact-boundary-conditions-using-the-finite-element-method
#20
Ryo Hamanaka, Satoshi Yamaoka, Tuan Nguyen Anh, Jun-Ya Tominaga, Yoshiyuki Koga, Noriaki Yoshida
INTRODUCTION: Although many attempts have been made to simulate orthodontic tooth movement using the finite element method, most were limited to analyses of the initial displacement in the periodontal ligament and were insufficient to evaluate the effect of orthodontic appliances on long-term tooth movement. Numeric simulation of long-term tooth movement was performed in some studies; however, neither the play between the brackets and archwire nor the interproximal contact forces were considered...
November 2017: American Journal of Orthodontics and Dentofacial Orthopedics
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