Dissertations / Theses on the topic 'Orthodontic tooth movement'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Orthodontic tooth movement.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Lam, Garret Chi Yan. "Biomechanics of orthodontic tooth movement /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?MECH%202003%20LAM.
Full textIncludes bibliographical references (leaves 118-122). Also available in electronic version. Access restricted to campus users.
Tsui, Wai-kin, and 徐偉堅. "Bone anchorage for orthodontic tooth movement." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44661605.
Full textDerringer, Kathryn. "Angiogenesis in human dental pulp following orthodontic tooth movement." Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271545.
Full textWeltman, Belinda Jessica. "Root resorption associated with orthodontic tooth movement a systematic review /." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1236022079.
Full textVakani, Arvind Kenneth. "Effect of nitric oxide (NO) on orthodontic tooth movement in rats." [Gainesville, Fla.]: University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000811.
Full textSaloom, Hayder Fadhil. "The influence of obesity on orthodontic tooth movement : a clinical study." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/the-influence-of-obesity-on-orthodontic-tooth-movement(4d0d68c8-99da-47eb-bb29-0e472bec3db4).html.
Full textMcCormack, Steven William. "Biomechanical function of the periodontal ligament in biting and orthodontic tooth movement." Thesis, University of Hull, 2016. http://hydra.hull.ac.uk/resources/hull:13630.
Full textHarris, Angela Manbre Poulter. "Assessment of tooth movement in the maxilla during orthodontic treatment using digital recording of orthodontic study model surface contours." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_2231_1254312268.
Full textThe aim of this project was to measure changes in dimension of the first three primary rugae and to evaluate tooth movement in the maxilla during orthodontic treatment in patients treated with and without premolar extractions.
Al-Abdallah, Mariam. "The development of a new digital method of analysing three dimensional orthodontic tooth movement." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493436.
Full textBarva, Melinda Elizabeth. "The effect of orthodontic tooth movement on the mast cell population in the rat PDL /." Adelaide : Thesis (M.D.S.) -- University of Adelaide, Dept. of Dentistry, 1998. http://web4.library.adelaide.edu.au/theses/09DM/09dmb295.pdf.
Full textYee, Jason A. "The rate of tooth movement and dentoalveolar stress under heavy and light continuous orthodontic forces studied with a three dimensional finite element model." Thesis, Faculty of Dentistry, 2007. http://hdl.handle.net/2123/4296.
Full textKaiser, Albert Heinrich [Verfasser]. "Simulation of the Periodontal Ligament During the Initial Phase of Orthodontic Tooth Movement / Albert Heinrich Kaiser." Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1221669435/34.
Full textKasbergen, Geraldo Francisco. "Efeito do tratamento térmico nos fios ortodônticos de aço inoxidável /." Araçatuba : [s.n.], 2007. http://hdl.handle.net/11449/95801.
Full textAbstract: The aim of this study was to evaluate the effect of heat treatment in orthodontic wires of Chrome Nickel (CrNi) stainless steel. 40 arches of 0.014" (0,35 mm), 0.016" (0.40 mm), 0.018 "(0.45 mm) and 0.020" (0.50 mm) were used. The arches were divided 2 groups: with and without heat treatment and then measured in anterior and posterior regions using AutoCad 2000 software before and after tension and compression tests, using universal testing machine EMIC. The results were submitted to ANOVA multivariance test for statistical analysis with level of 5% (p<0.05). Through the methodology used in this study it can be concluded that the orthodontic arches with heat treatment presented soft transversal changes in the anterior region and larger transversal increases in the posterior region, probably without clinical relevance. The arches with and without heat treatment submited to compression force did not show significant transversal changes in the anterior and posterior regions. The arches 0.020" without heat treatment submited to traction force presented the largest increases in width in the anterior region. Traction force at posterior region led to arch openning with greater intensity in arches without heat treatment. The arches with heat treatment submited to traction force didn't change the transversal distance in the anterior region. It was found that arches with heat treatment had greater stability, especially when submitted to traction or opening forces.
Orientador: Osmar Aparecido Cuoghi
Coorientador: Paulo Henrique dos Santos
Banca: Adilson Luiz Ramos
Banca: Marcos Rogério de Mendonça
Mestre
Kebsch, Mark Peter. "The effect of fluoride administration on rat serum osteocalcin expression during orthodontic tooth movement : the Osteocalcin Project." Thesis, The University of Sydney, 2004. http://hdl.handle.net/2123/4795.
Full textPinkerton, Mark Neil, and n/a. "The molecular basis of orthodontic tooth movement : cytokine signaling by PDL cells in tension an in vitro study." University of Otago. School of Dentistry, 2007. http://adt.otago.ac.nz./public/adt-NZDU20071207.161056.
Full textAgi, Erol Proffit William R. "Effects of local administration of ketorolac tromethamine, a nonsteroidal anti-inflammatory drug, on orthodontic tooth movement in rats." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,298.
Full textTitle from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Orthodontics in the School of Dentistry." Discipline: Orthodontics; Department/School: Dentistry.
Chien, Esther. "16S analysis of the subgingival biofilm and cytokine profile in patients receiving fixed orthodontic treatment." The Ohio State University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu161485602285181.
Full textKasbergen, Geraldo Francisco [UNESP]. "Efeito do tratamento térmico nos fios ortodônticos de aço inoxidável." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/95801.
Full textO objetivo deste trabalho foi avaliar o efeito do tratamento térmico (ou revenido) nos fios ortodônticos de aço inoxidável de Cromo Níquel (CrNi). Foram utilizados 40 arcos das espessuras 0.014”(0,35mm), 0.016”(0,40mm), 0.018”(0,45mm) e 0.020”(0,50mm). Os arcos foram divididos nos grupos sem e com tratamento térmico e, posteriormente, mensurados nas regiões anterior e posterior por meio do “software” AutoCad 2000 antes e após os ensaios mecânicos de compressão e tração por meio da máquina de ensaio universal EMIC. Os resultados foram submetidos à análise estatística com teste de multivariância ANOVA em nível de 5% (p<0,05). Diante da metodologia utilizada neste estudo, pode-se concluir que os arcos ortodônticos tratados termicamente apresentam suaves modificações transversais na região anterior e maiores aumentos transversais na região posterior, porém, provavelmente, sem relevância clínica. Os arcos sem e com tratamento térmico submetidos à força de compressão não apresentaram alterações transversais significantes nas regiões anterior e posterior. Nos arcos sem tratamento térmico submetidos à força de tração ocorreram aberturas mais acentuadas na região anterior nos arcos 0.020”. Na região posterior, a abertura proporcionada pela tração ocorreu com maior intensidade nos arcos sem tratamento térmico. Os arcos com tratamento térmico submetidos à força de tração não alteraram a distância transversal na região anterior. Nos arcos tratados termicamente constatou-se uma maior estabiidade, principalmente quando submetidos à tração ou à abertura.
The aim of this study was to evaluate the effect of heat treatment in orthodontic wires of Chrome Nickel (CrNi) stainless steel. 40 arches of 0.014 (0,35 mm), 0.016 (0.40 mm), 0.018 (0.45 mm) and 0.020 (0.50 mm) were used. The arches were divided 2 groups: with and without heat treatment and then measured in anterior and posterior regions using AutoCad 2000 software before and after tension and compression tests, using universal testing machine EMIC. The results were submitted to ANOVA multivariance test for statistical analysis with level of 5% (p<0.05). Through the methodology used in this study it can be concluded that the orthodontic arches with heat treatment presented soft transversal changes in the anterior region and larger transversal increases in the posterior region, probably without clinical relevance. The arches with and without heat treatment submited to compression force did not show significant transversal changes in the anterior and posterior regions. The arches 0.020 without heat treatment submited to traction force presented the largest increases in width in the anterior region. Traction force at posterior region led to arch openning with greater intensity in arches without heat treatment. The arches with heat treatment submited to traction force didn’t change the transversal distance in the anterior region. It was found that arches with heat treatment had greater stability, especially when submitted to traction or opening forces.
Vicente, Micaela Almeida. "Bisfosfonatos e Tratamento Ortodôntico." Master's thesis, [s.n.], 2011. http://hdl.handle.net/10284/2352.
Full textCada vez mais os pacientes que necessitam de tratamento ortodôntico fazem terapias concomitantes. De forma a relacionar o tratamento ortodôntico com os bisfosfonatos (BFs), foi feita uma revisão bibliográfica, baseada em informação obtida por pesquisa manual e via online, no “Google”, “MEDLINE/PubMed”, “Science Direct ” e “B-On”. As palavras-chave foram: “orthodontic tooth movement”, “bisphosphonates”, “orthodontics”, “osteonecrosis”, “bone resorption”, “rats”, “root resorption”, “rapid expansion”, “retention”. Só nos últimos 40 anos, os BFs têm sido implementados no tratamento de desordens do metabolismo do cálcio, por inibirem a reabsorção óssea. Estes podem ser administrados em crianças e adultos, por via oral e intra-venosa. Como o movimento ortodôntico dentário (MOD) consiste na aposição e reabsorção ósseas localizadas, a sua amplitude é afectada (inibida) por este medicamento. Este efeito pode ser desejável ou indesejável. Assim, a terapia com BFs pode prevenir a reabsorção radicular, associada ao MOD; preservar os resultados dos procedimentos que requerem neoformação óssea (ex. expansão maxilar ou distracção mandibular); promover retenção mais segura, após expansão; sistemicamente diminuem as fracturas ósseas e têm propriedades anti-angiogénicas e antineoplásicas. Contudo, podem provocar cicatrização óssea comprometida e osteonecrose. São necessários mais estudos prospectivos e ensaios clínicos randomizados, de forma a avaliar e potenciar os efeitos benéficos da terapia com BFs no tratamento ortodôntico. Increasingly, patients who require orthodontic treatment make concomitant therapies. In order to relate the orthodontic treatment with bisphosphonates (BFS), a literature review was made, based on information obtained through manual and online search, using "Google", "MEDLINE / PubMed", “Science Direct ” and "B-On". The key words were: "orthodontic tooth movement", "bisphosphonates," "orthodontics", "osteonecrosis," "bone resorption", "rats", "root resorption", "rapid expansion," "retention". Only in the last 40 years, the BFS has been implemented in the treatment of disorders of calcium metabolism, by inhibiting bone resorption. They can be administrated to children and adults, oral and intravenous. As the orthodontic tooth movement (OTM) consists in apposition and bone resorption, its amplitude is affected (inhibited) by this drug. This effect may be desirable or undesirable. Thus the BFS therapy can prevent root resorption associated with the OTM, preserve the results of procedures that require new bone formation (eg maxillary expansion and jaw distraction), promoting safer retention after expansion; systemically reduce bone fractures and have anti-angiogenic and antineoplastic properties. However, they can cause impaired bone healing and osteonecrosis. Further prospective randomized studies and clinical trials are needed, to assess and enhance the beneficial effects of therapy with BFS in orthodontic treatment.
Sanches, Francyle Simões Herrera. "Efeitos da movimentação dentária mesiodistal para área de rebordo alveolar atrófico: avaliação por meio de modelos digitais." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-03092015-112251/.
Full textObjectives: The aim of this study was to evaluate, in adults with loss of the first permanent molars, the inclinations and angles of adjacent teeth as well as the alveolar ridge thickness after mesial movement of second molars to close the space of the tooth loss and second molar uprighting to rehabilitation prosthetic. Methods: Two study groups were selected. The Group Closure (GC) was composed of 12 quadrants with no permanent first molars and edentulous spaces varying from 2 to 7mm, which were treated with orthodontic space closure. The Group Opening (GO) was composed of 14 quadrants with no permanent first molars and edentulous spaces varying from 7.1 to 12mm, which were treated with orthodontic uprighting of the second and third molars and reopening space for prosthetic rehabilitation. In digital dental models were evaluated the angulation, inclination, the cervical-occlusal dimension and alveolar ridge thickness. Interphase and intergroup comparisons were performed with with paired t-test and independent t-test, respectively (p <0.05). Results: There was improvement in the angulation of the mandibular second molars both in GC and GO, showing the mechanical efficiency in both therapies; there were no significant changes in buccolingual inclinations of the posterior teeth in both groups; the alveolar ridge thickness increased in GC and remained constant in GO. Conclusions: Both treatment modalities have demonstrated appropriate results. The choice of treatment plan should consider the cost-benefit of each case, taking into account the initial dimension of the space, the presence of third molars, initial periodontal conditions, treatment time and the financial cost.
Moresca, Ricardo Cesar. ""Estudo dos efeitos dos lacebacks ativos e passivos na biomecânica da fase de nivelamento utilizando-se a técnica MBT"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/23/23133/tde-30082006-151221/.
Full textThe purpose of this study was to evaluate the effects of active and passive lacebacks in the biomechanics of the leveling phase, using the MBT technique. The sample was composed of 29 Brazilian subjects (22 female and 7 male), Caucasian, with Class I malocclusion and mean age of 15 years and 5 months. The orthodontic treatment was planned with the extraction of the first premolars, and the leveling phase was performed with stainless steel wire only (0.014, 0.016, 0.018, 0.020 e 0.019 x 0.025). The anchorage control devices used in the upper and lower arches were, respectively, the IHG extraoral appliance and the fixed lingual arch. According to the type of laceback prescription, the sample was divided into four groups: group I 14 subjects in which active lacebacks were used in the upper arch; group II 9 subjects in which passive lacebacks were used in the upper arch; group III 19 subjects in which active lacebacks were used in the lower arch; group IV 10 subjects in which passive lacebacks were used in the lower arch. For each subject of the sample two lateral cephalometric radiographs were taken: one at the beginning and another at the end of the leveling phase, with a mean interval of 21 months. The data were collected using the resources of computerized cephalometry. To perform the analysis of errors, the cephalometric method was repeated in all subjects of the sample, by the same operator, with a minimum interval of 15 days between the measurements. The results revealed that the observed variations were compatible with the estimates of operational errors in cephalometric studies. After statistical analysis and interpretation of the results, it was observed that in group I, only the crown of the upper first molar presented a mesial movement. As to the upper central incisor, both the crown and the root presented a lingual movement. However, the inclination of these teeth was not affected. In group II, the upper first molar remained stable and only the crown of the upper central incisor moved lingually, leading to a clockwise rotation of this tooth. In group III, a mesial movement of both the crown and the root of the lower first molar was observed, along with its extrusion, whereas the position of the lower central incisor remained unchanged. The inclination of these teeth was not affected either. In group IV, it was observed that neither the lower first molar nor the lower central incisor experienced variations in the anteroposterior sense. Vertically, there only was extrusion of the lower first molar.
AL-Hashimi, Najat AL-Sayed. "Experimental studies on effects of orthodontic forces in generation of immune responses : possible roles for immunoregulating molecules in the control of alveolar bone remodeling /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7349-985-4/.
Full textFawzy, Khaled Mohamed Mostafa. "A longitudinal study of the growth of soft-tissues of the face and its relevance to soft tissue response to orthodontic tooth movement." Thesis, King's College London (University of London), 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245169.
Full textBaleanu, Raluca. "The effects of low level laser therapy and led- meditated photobiomodulation on the pulp canal volume of human premolars undergoing orthodontic tooth movement." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25940.
Full textFerreira, FabÃola Nogueira Holanda. "A terapia laser de baixa intensidade na ortodontia e seus efeitos no controle da dor, na movimentaÃÃo dentÃria e na remodelaÃÃo Ãssea da sutura palatina mediana." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11610.
Full textLopes, Rachelle Simões Reis. "Avaliação cefalométrica das alterações dentoesqueléticas e tegumentares em jovens com má oclusão de classe II tratados com distalizadores Distal Jet." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/25/25134/tde-21062007-113241/.
Full textThis study evaluated the dentoskeletal and soft tissue changes promoted by the intraoral distalizer Distal Jet, by analysis of lateral cephalograms. The sample was composed of 44 patients, divided into two groups, as follows. Group 1 (study group) was composed of 22 patients, being 5 males and 17 females, with Class II malocclusion, among which 72,72% exhibited ½ Class II, 18,18% ¼ Class II, and 9,09% ¾ Class II. The initial age ranged from 10,54 years to 14,77 years (mean 12,71 years). These patients were treated with the intraoral distalizer Distal Jet for a mean period of 1,20 years. Group 2 (control group) comprised 22 patients, being 13 males and 9 females, aged 11,03 to 14,63 years (mean 12,27 years) at the onset of follow-up, presenting with untreated Class II malocclusion, who were followed for a mean period of 1,18 years. The groups were rendered compatible as to age, period of treatment/observation, severity of malocclusion and initial cephalometric variables. The Student t test for independent samples was applied to compare the initial and final ages, period of treatment/observation, initial cephalometric variables and actual mean changes in the comparison between groups. The severity of malocclusion between groups was analyzed by the chi-square test. The initial and final changes for the study group were evaluated by the t test for dependent samples. The Distal Jet distalizer did not change the anteroposterior positioning of maxilla and mandible, yet promoted an increase in facial growth pattern due to a significant change in mandibular plane angle (FMA). The maxillary first molars exhibited significant distalization, yet did not present statistically significant distal inclination and extrusion. The maxillary second molars presented significant distal inclination, extrusion and distalization. The reciprocal effect of Distal Jet on the anchorage unit promoted significant buccal tipping and protrusion of maxillary incisors, as well as mesialization of the maxillary first premolars, leading to an increased overjet. There were no significant changes in the extrusion of maxillary first premolars and incisors, overbite and facial profile.
Nowlin, Ryan Van. "A comparison of treatment and posttreatment results in four first premolar extraction cases : tweed standard edgewise vs. the preadjusted appliance /." Oklahoma City : [s.n.], 2003.
Find full textShi, Jianwei [Verfasser], and Andrea [Akademischer Betreuer] Wichelhaus. "Establishment and application of an in vitro method to investigate the intercellular communication between cells involved in orthodontic tooth movement / Jianwei Shi ; Betreuer: Andrea Wichelhaus." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1187135445/34.
Full textJanjić, Ranković Mila [Verfasser], and Andrea [Akademischer Betreuer] Wichelhaus. "Investigation of inter- and intracellular communication during simulated orthodontic tooth movement with the “Weight Approach Based” in vitro model / Mila Janjić Ranković ; Betreuer: Andrea Wichelhaus." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1212362918/34.
Full textKimura, Rui Yoshio. "Posttreatment stability of lip bumper therapy." Oklahoma City : [s.n.], 2002. http://library.ouhsc.edu/epub/theses/Kimura-Rui-Yoshio.pdf.
Full textMassif, Laurent. "Biofonctionnalisation du silicium poreux pour la détection de MMP-8 (Collagénase-2)." Thesis, Montpellier 1, 2012. http://www.theses.fr/2012MON12201.
Full textThe matrix métalloprotéinase (MMP) 8 or collagenase 2 is able to cleave native molecules, triple helixes, of the interstitial collagen, so introducing the cellular reshaping during orthodontic tooth movement. It is a major biomarker of the periodontal tissular remodeling. The increase of the expression and the activation of MMP-8 in the gingival fluid reflects the activity of the periodontal remodeling. On average, the concentration of MMP-8 taken in the gingival fluid of the orthodontic patients is 12 times as raised(brought up) (56 ± 50 µg / l against 4,6 ± 4 µg / l) that at the not orthodontic patients. Followed it by fluctuations in MMP-8 during the orthodontic movement require the development of a biosensor. The objective of this work is to use a photonique structure with porous silicon for the conception of an optical biosensor of the MMP-8. We determined the choice of the substratum of porous silicon (PSi) the most adapted to our application with a high specific surface and pores opened enough for the infiltration of the biomolecules which are antibodies anti-MMP-8. Then we set up a process of chemical and biological fonctionnalisation of the internal surface of these samples
Salles, Alvaro Wagner Rodrigues. "Estudo da microcirculação na polpa dentária durante a movimentação ortodôntica via técnica Laser Doppler." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-18052012-092504/.
Full textCellular and neurovascular changes in the pulp have been related to orthodontic forces, used to produce a dental movement. The observed alterations are generally related to pulpal vascular changes. Earlier studies on pulpal blood flow (PBF) changes during the dental movement were carried out by using qualitative techniques (e. g., histological slices), and quantitative (e. g., radioactive or fluorescent microspheres, radiospirometry). Such techniques are invasive, destructive, and do not allow dynamic flow changes to be studied. Recently the laser Doppler flowmetry (LDF), a non-invasive technique, has been used to study dynamic PBF alterations in humans into nearly real conditions. The available studies in the literature, by using the LDF, are limited to experimental studies, probably due to the LDF practical limitations. The aim of this work was, by using the FDF, to study PBF alterations from volunteers subjected to two phases of a current orthodontic treatment (leveling and retraction), into real clinical conditions. Twelve volunteers were monitored during the leveling phase and thirteen volunteers were monitored during the retraction phase, before the force to be applied, and 20 minutes, 48 hr, 72 hr and 1 month later. Analyzing the obtained results, during the two studied phases, it were found suffice statistical evidences to infer that significant PBF decrease occurs on the investigates moments: 20 minutes, 48 hr and 72 hr. During the leveling phase, on day 30, the PBF is near or equal to the basal level. During the retraction, on day 30, the flow is still decreased.
Crowther, Lachlan. "The preventive effects of systemic casein phosphopeptides on the resorption of roots in rats." Thesis, Faculty of Dentistry, 2008. http://hdl.handle.net/2123/4054.
Full textMarques, Natasha D'Andrea Mateus. "Estudo da expressão das moléculas reguladoras da remodelação do osso alveolar durante a movimentação ortodôntica com força contínua em ratos tratados com alendronato sódico." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/23/23140/tde-25022016-165617/.
Full textOrthodontic tooth movement occurs through two processes in which the alveolar bone is resorbed in the pressure areas, whereas new bone is formed in the tension area. The bone resorption occurs by multinucleated cell, the osteoclasts. The bisphosphonates are drugs with capability to inhibit clastic activity were used in the present study in order to interfere with the bone remodeling induced orthodontic. For this continuous force of 15 cN was applied to the first molars of Wistar male rats of 2 1/2 months, using a biomechanical with superelastic wire. The animals were randomly divided into 4 groups: 1) The control group consisted of eighteen mice, which received sterile saline solution saline for 7 days prior to installation of passive biomechanics, which remained for 3, 10 and 18 days; 2) Eighteen animals were treated with ALN (dose 2.5 mg / kg) for 7 days prior to installation of the passive biomechanical to remain for 3, 10 and 18 days; 3) Eighteen animals were treated with alendronate with the same dose quoted above for 7 days prior to the biomechanical installation that remains active for 3, 10 and 18 days; 4) Eighteen animals were injected with sterile saline solution 7 days prior to the biomechanical installation that remains active for 3, 10 and 18 days. The maxillae were fixed with 4% formaldehyde + 0.1% glutaraldehyde, decalcified in EDTA 4.13% and embedded in paraffin or Spurr resin. The specimens were morphologically analyzed in HE stained sections. Some stained sections were used for immunolabeling for RANKL and OPG. The osteoclasts were marked by tartrate-resistant acid phosphatase (TRAP) histochemistry. The ultrathin sections were examined in a trasnmission electron micrsocpe. Some specimens were frozen in liquid nitrogen for protein extraction and Western Blotting protein expression analyzes. The ALN inhibited bone resorption and root of all the treated groups. The clastic cells present in a latent state. In the orthodontic movement group alveolar bone was remodeled with 18 days to root surface presented itself reabsorbed and the TRAP revealed clasts assets, findings confirmed by transmission electron microscopy. Expression of RANKL activating molecule clastic cells was not inhibited by the drug. The OPG expression was increased in treated animals. The results demonstrate that the use of alendronate in the orthodontic movement does not interfere with osteoclast recruitment, it apparently inhibits their activation, which can interfere in the bone remodeling process and may reduce the amount of tooth movement.
Sousa, Marines Vieira da Silva. "Avaliação da influência do laser de baixa intensidade como recurso de ancoragem ortodôntica e na supressão da dor." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-11112013-161133/.
Full textThis study investigated the effects of low level laser in orthodontic movement, aiming to promote anchorage and inhibition of pain after activation, as well as to analyze the maintenance of tissue integrity after utilization of laser and orthodontic movement. The sample was composed of 74 maxillary and mandibular molars and premolars that served as anchorage in the initial retraction stage of canines, performed with NiTi coil springs with force of 150g. One of the randomly selected molars/premolars was irradiated with diode laser (LI), according to the following application protocol: 780mm/70mW/105J/cm2/4.2J per point/Et= 42J for molars and 42J for premolars at days 0, 7 and 14 after activation, and the contralateral tooth was considered as (LNI). The retraction lasted 3 months in the average, adding up to 9 laser applications. Dental casts and cone beam computed tomographies (CBCT) were evaluated to analyze the anchorage loss of molars. The dental casts obtained every month were measured with a digital pachymeter and the tomographies obtained at initial (T0) and final periods (T4) were assessed by 3D analysis (Radiomemory). The tomographies were also assessed to evaluate a possible resorption of the alveolar bone crest (CA), by measuring the distance between it (CA) and the cementoenamel junction (JCE), comparing T0 and T4 and the quantity of root resorption, by the difference between the initial and final root lengths. The painful symptomatology was analyzed by comparison of LI and LNI using a visual analogue scale after 12, 24, 48 and 72 hours, in which the patients indicated from 0 to 10 according to the pain experienced. For the dental casts, two-way and one-way analysis of variance were applied, followed by the Tukey test and then by the paired t test, for measurement of the total difference comparing the irradiated (LI) and non-irradiated (LNI) sides. The paired t test was applied for comparison between periods T0 and T4 of anchorage loss, root resorption and alveolar bone crest, comparing the LI and LNI. The parametric Wilcoxon test was applied, and the difference in experienced pain between periods was analyzed by the non-parametric Friedman test. All tests were performed at a significance level of 5%. In dental casts, for comparison between periods, the results indicated statistically significant reduction in the rate of movement of irradiated molars compared to the contralateral only on the first month, yet there was statistically significant difference comparing the periods T0 and T4. In the tomographies, there was statistically significant difference in the rate of movement comparing T0 and T4. There was also statistically significant reduction of painful symptomatology when LI was compared to LNI, with statistically significant gain of bone tissue at the distal bone crests of the maxillary first molar. It was concluded that laser therapy at the adopted dose may reduce the orthodontic movement of the anchorage teeths in the stage of initial retraction of canines, as well as reducing the painful symptomatology without damage to the periodontal tissues and even contributing to increase the bone support.
Junior, Rivail Antonio Sergio Fedel. "Alteração do volume de fluido gengival de pacientes com periodontite crônica em manutenção periodontal sob tratamento ortodôntico: estudo piloto." Universidade do Estado do Rio de Janeiro, 2010. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=3083.
Full textO objetivo do estudo foi mensurar as alterações na quantidade do volume de fluido gengival (FG) dos dentes submetidos à movimentação ortodôntica, em adultos com periodontite crônica na fase de manutenção periodontal. O FG foi coletado com uma tira de papel absorvente padrão das áreas de pressão dos dentes de 10 pacientes (sete homens e três mulheres) e medido em microlitro no Periotron em seis dias distintos (dia -7, dia 0, dia 1, dia 7, dia 14 e dia 21). Os pacientes foram submetidos a um rigoroso programa de controle de placa. O teste de Wilcoxon foi aplicado para comparar os dados obtidos. Os resultados mostraram que o controle de placa efetivo baixou a quantidade de FG do dia -7 para o dia 0, e em seguida houve uma elevação do FG até o dia 7 por conta do início da movimentação ortodôntica, e uma nova queda do dia 7 até o 21. O maior volume de FG foi encontrado no dia 7, uma semana após o início da movimentação. O menor volume no dia 0. Concluindo, a movimentação ortodôntica aumentou o volume de FG do dia 0 até o dia 7.
The aim of this study was to measure the alterations in the amount of gingival crevicular fluid (GCF) of teeth during orthodontic tooth movement in adults with chronic periodontitis under a periodontal maintenance program. The GCF was collected with paper stripes from pression sides of teeth in 10 patients (7 males and 3 females) and measured in microlitres on Periotron in six distinct periods of time (day -7, day 0, day 1, day 7, day 14, day 21). Patients were under supervised program of plaque control. Wilcoxon test was applied to compare the data. The results shown that the effective plaque control reduces the amount of GCF from day -7 to day 0, followed by an elevation until day 7 after the beginning of orthodontic tooth movement and a new reduce from day 7 to 21. The highest amount of GCF was found on day 7, one week after the beginning of tooth movement, while the smallest found on day 0.
Lisboa, Juliana da Costa. "Estudo comparativo de diferentes mini-implantes utilizados para mesialização de segundo molar inferior : análise por elementos finitos 3d /." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/155952.
Full textApproved for entry into archive by Silvana Alvarez null (silvana@ict.unesp.br) on 2018-09-10T19:21:58Z (GMT) No. of bitstreams: 1 lisboa_jc_me_sjc.pdf: 1704367 bytes, checksum: 0a852a606d663babe8ff1cd313f64b57 (MD5)
Made available in DSpace on 2018-09-10T19:21:59Z (GMT). No. of bitstreams: 1 lisboa_jc_me_sjc.pdf: 1704367 bytes, checksum: 0a852a606d663babe8ff1cd313f64b57 (MD5) Previous issue date: 2018-07-13
A perda do primeiro molar é uma situação comum na rotina do consultório e com isso surgem alternativas de tratamento para reabilitação, sendo uma delas, o fechamento de espaço através da mesialização do segundo molar. O uso de mini- implante proporciona ancoragem máxima, costuma ser bem tolerado pelo paciente e se destaca pela facilidade de instalação e remoção, apresentando dessa maneira desempenho clínico bastante favorável. O objetivo desse estudo foi analisar a distribuição de tensões em modelo que simula a mesialização de molar inferior utilizando diferentes tipos de mini-implantes. Embasado no método dos elementos finitos foi obtido modelo ósseo de mandíbula por recomposição de uma tomografia computadorizada realizada pelo software Invesalius (CTI, São Paulo, Brasil). O desenho do segundo molar foi obtido por técnica de recomposição tomográfica. Elementos de ancoragem auto-perfurantes da marca Neodent e também auto-rosqueantes da marca Titanium Fix foram desenhados e modelados por ferramenta de revolução do perfil desenhado no software Rhinoceros 3D, inseridos ao bloco ósseo e então submetidos a cargas de 200 cN. Os resultados foram calculados e analisados pelo programa Ansys 17.0 para verificação por meio da análise de mapas de deslocamento e tensões máximas principais, principalmente do osso cortical e indicaram que, dentro do modelo experimental, o ligamento periodontal apresentou valores baixos de tensão máxima principal, porém dentro dos valores fisiológicos para prover a movimentação, com visualização de áreas de compressão e de tração com escala entre 0,1 a -0,1 MPa. Concluiu-se que a carga testada permite a deslocamento dentário porém com tendência a giroversão.
The loss of the first molar is a common situation in the routine of the dentist and with this treatment alternatives for rehabilitation arises, one of them being the closure of space through the mesialization of the second molar. The use of mini-implants provides maximum anchorage, is well tolerated by the patient and stands out for ease installation and removal, thus presenting a very favorable clinical performance. The objective of this study was to analyze the stress distribution in a model that simulates the inferior molar mesialization using different types of mini- implants. Based on the finite element method, a mandible bone model was obtained by recomposing a computerized tomography performed by invesalius software (CTI, São Paulo, Brazil). The second molar design was obtained by a technique similar to the tomographic recomposition. Neodent self-piercing anchoring elements and also Titanium Fix self-piercing anchors were designed and modeled by a revolution tool in the Rhinoceros 3D software, inserted into the bone block and then subjected to loads of up to 200 cN. The results were calculated and analyzed by the Ansys 17.0 program for verification by means of the analysis of displacement maps and main maximum stresses, mainly of the cortical bone and indicated that, within the experimental model, the periodontal ligament presented low values of main maximum tension, however within the physiological values to provide the movement, with visualization of areas of compression and traction with scale between 0.1 and -0.1 MPa. It was concluded that the load tested allows dental displacement but with a tendency to gyroversion.
Santos, Patrícia Bittencourt Dutra dos. "Efeitos periodontais da movimentação dentária de molares inferiores para área de rebordo alveolar atrófico." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/25/25144/tde-07012015-093141/.
Full textObjective: The aim of this study was to evaluate the buccal and lingual bone plate thickness measurements and dehiscences of mandibular second premolars and molars after orthodontic treatment in patients with loss of first permanent molar and to investigate periodontal parameters behavior. Methods: The sample comprised 36 hemiarchs which were divided into 3 groups: GA (15 uprighted molars), GF (12 molars that were moved to atrophic areas) and GC (control grup 9 molars aligned and leveled). Posttreatment CBCT exams of the mandible were taken with voxel dimensions of 0.2 mm using the i-CAT Cone-Beam 3-D Dental Imaging System. Linear measurements were performed using the Dolphin software on cross section slices. Dehiscences and bone plate thickness measurements at middle of root were taken in buccal and lingual surfaces. Fenestrations, root apex position e root coverage were evaluated. Besides, the probing depth, plaque index, recession level and gingival bleeding index were evaluated before and after molar movement. The comparison between groups regarding dehiscence and bone thickness was performed by ANOVA followed by Tukey test. Presence of fenestration and root apex position were investigated by chi-square test. Root coverage measurements were performed by kruskal-wallis and Mann-Whitney. Periodontal parameters investigation were performed by Student t test (intergroup) and ANOVA and Tukey test (intergroup). Results: There were no significant differences for premolars measurements. Other than that, the distance between the CEJ and the alveolar crest was significant higher for molars that were moved to atrophic areas without differences on bone thickness. There was no difference for presence of fenestration between groups. GF showed centralized root apex, while others groups showed a small buccal root displacement. GF showed lower root coverage than GA and GC. Regarding periodontal parameters, there was no differences for intragroup comparison, but bleeding gingival index was higher on GA at end of treatment. Conclusions: It was concluded that molar movement to atrophic areas increased buccal and lingual dehiscences and this movement should be indicated with caution.
Knop, Luégya Amorim Henriques. "Ação da dexametasona sobre o movimento dentário induzido em ratos, estudo histológico = The effect of dexamethasone on orthodontic tooth movement in rats / Luégya Amorim Henriques Knop ; orientador, Orlando Tanaka ; co-orientadora, Maria ângela Naval Machado." reponame:Biblioteca Digital de Teses e Dissertações da PUC_PR, 2008. http://www.biblioteca.pucpr.br/tede/tde_busca/arquivo.php?codArquivo=1251.
Full textInclui bibliografias
A movimentação dentária é caracterizada inicialmente por uma inflamação aguda estéril, seguida por reações múltiplas seqüenciais no ligamento periodontal em resposta às forças biomecânicas. Os corticosteróides são agentes antiinflamatórios potentes, ampla
The early phase of orthodontic tooth movement involves sterile acute inflammation of the periodontal ligament in response to biomechanical forces. Corticosteroids are potent antiinflammatories widely used in medical and dentistry clinics. The aim of this
Shintcovsk, Ricardo Lima. "Efeito da nicotina na remodelação óssea durante o movimento dentário induzido em ratos : estudo histológico = Nicotine effect upon bone remodeling during orthodontic tooth movement in rats: a histological study / Ricardo Lima Shintcovsk ; orientador, Hiroshi Maruo ; co-orientadora, Maria Ângela Naval Machado." reponame:Biblioteca Digital de Teses e Dissertações da PUC_PR, 2008. http://www.biblioteca.pucpr.br/tede/tde_busca/arquivo.php?codArquivo=1248.
Full textInclui bibliografias
O tabaco é considerado o principal fator de risco para o desenvolvimento de doenças cardiovasculares e pulmonares. Não há relatos na literatura que associem a eventual ação da nicotina no movimento dentário induzido. O objetivo deste estudo foi investigar
Abstract: Tobacco is considered the main risk factor for developing cardiovascular and lung disease. There are no reports in the literature demonstrating the effect of nicotine on orthodontic movement. The aim of this study was to investigate the effect o
Goldade, Kent Douglas. "Physical properties of the upper lip measured during simulated tooth movement." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq23317.pdf.
Full textÖdman, Jan. "Implants in orthodontics an experimental and clinical study /." [Göteborg] : Dept. of Orthodontics, Faculty of Odontology, University of Göteborg, 1994. http://books.google.com/books?id=fn1qAAAAMAAJ.
Full textMartins, Renato Parsekian. "Estudo clínico da retração de caninos e perda de ancoragem com a mola T do grupo A e estudos analíticos da mola T do grupo A e B /." Araraquara : [s.n.], 2007. http://hdl.handle.net/11449/104493.
Full textBanca: Peter H. Buschang
Banca: José Nelson Mucha
Banca: Cássio Panitz Selaimen
Banca: Ary dos Santos Pinto
Resumo: Objetivo: Avaliar a retração parcial de caninos utilizando a mola "T" (TTLS) do grupo A a e a perda de ancoragem dos molares, analisar mecanicamente a mesma TTLS e também avaliar a pré-ativação da TTLS do grupo B, por curvatura e dobras. Material e Método: Quatro artigos científicos foram redigidos e utilizados para a avaliação dos propósitos apresentados. Resultados: Os caninos superiores foram retraídos 3,2 mm, enquanto os inferiores foram retraídos 4,1 mm. Os molares superiores e inferiores foram protraídos 1,0 mm e 1,2 mm, respectivamente. Os caninos se movimentam 1,5 mm no primeiro mês e 2,43 mm no segundo. A TTLS do grupo A deve ter 7 X 10 mm, e ao ser ativada 4 mm, ficar posicionada a 2 mm do bráquete anterior e ter a dobra de gable a 4 mm do tubo posterior. A pré-ativação da TTLS do grupo B por curvatura gerou M/F em média 2,5 mm maiores que a pré-ativação por dobras. Conclusões: Os caninos superiores foram retraídos por inclinação controlada, enquanto os inferiores foram retraídos por inclinação descontrolada. Os molares superiores e inferiores foram protraídos por inclinação controlada. Em 2,1 meses de retração de 14 caninos, a perda de ancoragem dos molares foi de 0,3 :1. Os caninos se movimentam mais no segundo mês do que no primeiro. Foi possível desenvolver uma padronização e otimização da TTLS pré-ativada para o grupo A. A pré-ativação da TTLS do grupo B por curvatura gerou M/F maiores quando comparada a pré-ativação por dobras.
Abstract: Objective: To evaluate both the partial retraction of canines and the loss of anchorage of the molars using a Group A Titanium "T" Loop Spring (TTLS), and also to evaluate the preactivation differences of curvature vs. bends on a group B TTSL. Materials and Method: Four research papers were written and analyzed for the evaluation of the aims presented. Results: Upper canines were retracted 3.2 mm, while the lower ones were retracted 4.1 mm. The upper and lower molars were protracted 1.0 and 1.2 mm, respectively. The canines were moved 1.5 mm in the first month and 2.43 mm on the second, on average. The group A TTLS should have 7 X 10 mm, and on 4 mm of activation, it should be located 2 mm from the anterior bracket with its preactivation bend positioned 4 mm from the posterior tube. The group B TTLS preactivated by curvature generated M/F ratios 2.5mm larger than the bend preactivation, on average. Conclusions: The upper canines were retracted by controlled tipping, while the lower ones were retracted by uncontrolled tipping. The upper and lower molars were protracted by controlled tipping. In 2.1 months of canine retraction, the loss of anchorage was 0.3:1, compared to the canines. The canines were moved more in the first month than on the 16 second. It was possible to develop a standard and an optimization for the group A TTLS. The Group B TTLS preactivated by curvature generated larger M/F when compared to the bend preactivation.
Doutor
Caldas, Sergei Godeiro Fernandes Rabelo [UNESP]. "Avaliação do sistema de força e estabilidade a longo prazo gerado por molas T do grupo B." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/95765.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Comparar o efeito do tipo de pré-ativação (curvatura ou dobra) e avaliar o efeito do alívio de tensão estrutural sobre a estabilidade do sistema de força gerado por molas “T” do grupo B confeccionadas com fio de beta-titânio 0,017” x 0,025” (TMA®, Ormco Corporation, Glendora, EUA). Materiais e Métodos: Dois artigos científicos foram redigidos e utilizados para a avaliação dos propósitos apresentados. Resultados: As molas “T” pré-ativadas por curvatura produziram forças horizontais significativamente menores (variando de 51 gf a 405 gf) do que as molas pré-ativadas por dobras (variando de 106 gf a 431 gf). Não foram encontradas diferenças em relação aos momentos produzidos durante a desativação em ambos os grupos. As proporções momento-força foram sistematicamente maiores nas molas “T” pré-ativadas por curvatura do que as molas pré-ativadas por dobras (de 5,7 mm a 41,1 mm versus 5,4 mm a 15,2 mm), exceto para 5 mm de ativação. Foram encontradas diferenças significativas nas relações carga-deflexão (grupo curvatura = 78,07 gf/mm e grupo dobra = 71,65 gf/mm) e na posição neutra (grupo curvatura = - 0,18 mm e grupo dobra = -0,99 mm). As forças horizontais foram maiores (P<0,001) para o grupo imediato (267,6 gf) comparado aos demais grupos (200,7 gf a 181,7 gf), os quais não foram diferentes entre si. A posição neutra foi maior no grupo imediato (-0,99 mm) do que nos demais grupos (P<0,001) e o tempo não teve influência sobre a relação carga-deflexão (P=0,129). Os momentos gerados na desativação foram geralmente maiores (P=0,001) no grupo imediato (1932,6 gf.mm) do que nos demais grupos (1696,6 gf.mm a 1471,3 gf.mm), os quais não foram diferentes entre si. Todos os grupos produziram proporção momento-força semelhantes (P=0,640). Conclusões: As molas “T” pré-ativadas por curvatura apresentaram forças horizontais menores...
Compare the effect of preactivation (curvature or concentrated bend) and evaluate the changes in force system caused by stress relaxation of group B T-loop springs made with .017” x .025” beta-titanium (TMA®, Ormco Corporation, Glendora, USA) wires. Materials and Methods: Two research papers were written and analyzed for the evaluation of the aims presented. Results: TLSs preactivated by curvature delivered horizontal forces significantly lower (ranging from 51 gf to 405 gf) than the TLS preactivated by concentrated bends (ranging from 106 gf to 431 gf). No differences were found in relation to the moments produced throughout the deactivation of both groups. The moment-to-force ratios were systematically higher on the TLSs preactivated by curvature than the TLS preactivated by concentrated bends (from 5.7 mm to 41.1 mm versus 5.4 mm to 15.2 mm), except on 5 mm of activation. Significant differences were found in the load-deflection rates (curvature group = 78.07 gf/mm and concentrated bends group = 71.65 gf/mm) and neutral position (curvature group = -0.18 mm and concentrated bends group = -0.99 mm). The horizontal forces were higher (P<.001) for immediate group (267.6 gf) compared to the other 8 groups (200.7 gf to 181 gf) which were not different among themselves. The neutral position was greater in immediate group (-0.99 mm) than on the other groups (P<.001), and time did not have an effect on the load-deflection ratio (P=.129). The moment levels produced throughout the deactivation were generally higher (P=.001) for immediate group than for the other groups (1696.6 gf.mm to 1471.3 gf.mm) which were not different among themselves. All groups produced similar moment-to-force ratios (P=.640). Conclusions: The TLSs preactivated by curvature delivers lower horizontal forces and higher MF and LD ratios than the TLS preactivated by concentrated bends... (Complete abstract click electronic access below)
Shintcovsk, Luegya knop. "Uso da barra transpalatina removível com ativações simétricas para rotação distal dos molares : um estudo com método de elementos finitos /." Araraquara, 2016. http://hdl.handle.net/11449/144979.
Full textResumo: A Barra Transpalatina (BTP) removível, recurso da Técnica do Arco Segmentado, tem sido empregada em diversas situações clínicas na Ortodontia. O presente estudo teve por finalidade analisar através do Método dos Elementos Finitos (MEF) o movimento ortodôntico dos primeiros molares quando a BTP foi ativada simetricamente para correção de giro-versão, além de comparar a a BTP confeccionada com liga de aço inoxidável e titânio-molibdênio (TMA). Para tanto, um modelo virtual da maxila foi confeccionado a partir de uma tomografia computadorizada e no software CAD Solidworks, todas as geometrias das estruturas anatômicas e componentes ortodônticos foram modeladas. No software Ansys Workbench V11, foram atribuídas as características de cada estrutura a partir do módulo de elasticidade e coeficiente de Poisson e a ativação da BTP executada segundo parâmetros clínicos. Observou-se que houve movimento de rotação dos primeiros molares superiores, quando a BTP foi ativada simetricamente e que a maior concentração de tensão ocorreu na área de furca. A BTP de aço produziu maior pico de pressão quando comparada com a BTP de TMA. Concluiu-se que a BTP de TMA é mais indicada para uso clínico.
Removable Transpalatal Arch (TPA) has been employed in many clinical situations in Orthodontics. This study aimed to analyze, through the Finite Element Method (FEM), first molars orthodontic movement when TPA was activated symmetrically and to compare stainless steel and titanium-molybdenum alloy (TMA) TPAs. Thus, a virtual model of the maxilla was made from a CT scan and in CAD Solidworks software all anatomical structures and orthodontic components geometries were modeled. In Ansys Workbench V11 software, the features assigned to each structure from the modulus and Poisson's ratio were performed and activation of TPA conducted according to clinical parameters. It was observed upper first molars rotation movement when the TPA was activated symmetrically and stress concentration occurring in furcation area. The stainless steel TPA produced higher peak pressures when compared with the TMA TPA. It was concluded that the TMA TPA is more suitable for clinical use.
Doutor
Page, Kelly R. "A reevaluation of mandibular intercanine dimension and incisal position." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. https://www.mhsl.uab.edu/dt/2009r/page.pdf.
Full textMartins, Renato Parsekian [UNESP]. "Estudo clínico da retração de caninos e perda de ancoragem com a mola T do grupo A e estudos analíticos da mola T do grupo A e B." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/104493.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Objetivo: Avaliar a retração parcial de caninos utilizando a mola “T” (TTLS) do grupo A a e a perda de ancoragem dos molares, analisar mecanicamente a mesma TTLS e também avaliar a pré-ativação da TTLS do grupo B, por curvatura e dobras. Material e Método: Quatro artigos científicos foram redigidos e utilizados para a avaliação dos propósitos apresentados. Resultados: Os caninos superiores foram retraídos 3,2 mm, enquanto os inferiores foram retraídos 4,1 mm. Os molares superiores e inferiores foram protraídos 1,0 mm e 1,2 mm, respectivamente. Os caninos se movimentam 1,5 mm no primeiro mês e 2,43 mm no segundo. A TTLS do grupo A deve ter 7 X 10 mm, e ao ser ativada 4 mm, ficar posicionada a 2 mm do bráquete anterior e ter a dobra de gable a 4 mm do tubo posterior. A pré-ativação da TTLS do grupo B por curvatura gerou M/F em média 2,5 mm maiores que a pré-ativação por dobras. Conclusões: Os caninos superiores foram retraídos por inclinação controlada, enquanto os inferiores foram retraídos por inclinação descontrolada. Os molares superiores e inferiores foram protraídos por inclinação controlada. Em 2,1 meses de retração de 14 caninos, a perda de ancoragem dos molares foi de 0,3 :1. Os caninos se movimentam mais no segundo mês do que no primeiro. Foi possível desenvolver uma padronização e otimização da TTLS pré-ativada para o grupo A. A pré-ativação da TTLS do grupo B por curvatura gerou M/F maiores quando comparada a pré-ativação por dobras.
Objective: To evaluate both the partial retraction of canines and the loss of anchorage of the molars using a Group A Titanium “T” Loop Spring (TTLS), and also to evaluate the preactivation differences of curvature vs. bends on a group B TTSL. Materials and Method: Four research papers were written and analyzed for the evaluation of the aims presented. Results: Upper canines were retracted 3.2 mm, while the lower ones were retracted 4.1 mm. The upper and lower molars were protracted 1.0 and 1.2 mm, respectively. The canines were moved 1.5 mm in the first month and 2.43 mm on the second, on average. The group A TTLS should have 7 X 10 mm, and on 4 mm of activation, it should be located 2 mm from the anterior bracket with its preactivation bend positioned 4 mm from the posterior tube. The group B TTLS preactivated by curvature generated M/F ratios 2.5mm larger than the bend preactivation, on average. Conclusions: The upper canines were retracted by controlled tipping, while the lower ones were retracted by uncontrolled tipping. The upper and lower molars were protracted by controlled tipping. In 2.1 months of canine retraction, the loss of anchorage was 0.3:1, compared to the canines. The canines were moved more in the first month than on the 16 second. It was possible to develop a standard and an optimization for the group A TTLS. The Group B TTLS preactivated by curvature generated larger M/F when compared to the bend preactivation.
Shintcovsk, Luegya Knop [UNESP]. "Uso da barra transpalatina removível com ativações simétricas para rotação distal dos molares: um estudo com método de elementos finitos." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/144979.
Full textRejected by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br), reason: Solicitamos que realize uma nova submissão seguindo a orientação abaixo: O arquivo submetido está sem a ficha catalográfica. A versão submetida por você é considerada a versão final da dissertação/tese, portanto não poderá ocorrer qualquer alteração em seu conteúdo após a aprovação. Corrija esta informação e realize uma nova submissão com o arquivo correto. Agradecemos a compreensão. on 2016-11-30T17:27:10Z (GMT)
Submitted by LUÉGYA KNOP SHINTCOVSK null (luegya@hotmail.com) on 2016-12-01T18:38:21Z No. of bitstreams: 1 1 Tese versao final 01.pdf: 21517592 bytes, checksum: 85517129d04b4053ea9432d7d8f671fb (MD5)
Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-12-02T12:44:17Z (GMT) No. of bitstreams: 1 shintcovsk_ln_dr_arafo.pdf: 21517592 bytes, checksum: 85517129d04b4053ea9432d7d8f671fb (MD5)
Made available in DSpace on 2016-12-02T12:44:17Z (GMT). No. of bitstreams: 1 shintcovsk_ln_dr_arafo.pdf: 21517592 bytes, checksum: 85517129d04b4053ea9432d7d8f671fb (MD5) Previous issue date: 2016-10-31
A Barra Transpalatina (BTP) removível, recurso da Técnica do Arco Segmentado, tem sido empregada em diversas situações clínicas na Ortodontia. O presente estudo teve por finalidade analisar através do Método dos Elementos Finitos (MEF) o movimento ortodôntico dos primeiros molares quando a BTP foi ativada simetricamente para correção de giro-versão, além de comparar a a BTP confeccionada com liga de aço inoxidável e titânio-molibdênio (TMA). Para tanto, um modelo virtual da maxila foi confeccionado a partir de uma tomografia computadorizada e no software CAD Solidworks, todas as geometrias das estruturas anatômicas e componentes ortodônticos foram modeladas. No software Ansys Workbench V11, foram atribuídas as características de cada estrutura a partir do módulo de elasticidade e coeficiente de Poisson e a ativação da BTP executada segundo parâmetros clínicos. Observou-se que houve movimento de rotação dos primeiros molares superiores, quando a BTP foi ativada simetricamente e que a maior concentração de tensão ocorreu na área de furca. A BTP de aço produziu maior pico de pressão quando comparada com a BTP de TMA. Concluiu-se que a BTP de TMA é mais indicada para uso clínico.
Removable Transpalatal Arch (TPA) has been employed in many clinical situations in Orthodontics. This study aimed to analyze, through the Finite Element Method (FEM), first molars orthodontic movement when TPA was activated symmetrically and to compare stainless steel and titanium-molybdenum alloy (TMA) TPAs. Thus, a virtual model of the maxilla was made from a CT scan and in CAD Solidworks software all anatomical structures and orthodontic components geometries were modeled. In Ansys Workbench V11 software, the features assigned to each structure from the modulus and Poisson's ratio were performed and activation of TPA conducted according to clinical parameters. It was observed upper first molars rotation movement when the TPA was activated symmetrically and stress concentration occurring in furcation area. The stainless steel TPA produced higher peak pressures when compared with the TMA TPA. It was concluded that the TMA TPA is more suitable for clinical use.
Moreira, José Roberto Alves [UNESP]. "Análise comparativa da movimentação dentária induzida entre dois critérios de mensuração: macroscópico e microscópico." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/95795.
Full textEste estudo analisou a quantidade de deslocamento dentário por meio de mensurações macroscópicas e microscópicas, após a movimentação dentária induzida. Os dois Grupos Experimentais GI (forças contínuas) e GII (forças contínuas interrompidas) constituíram-se de 30 ratos, da linhagem Wistar, subdivididos de acordo com o período experimental de 8, 16 e 24 dias. Cada subgrupo foi composto por dez animais, assim como o Grupo Controle (GC), perfazendo um total de 70 animais. O aparelho destinado para se obter o deslocamento dentário foi o desenvolvido por Heller e Nanda. As molas de secção fechada foram instaladas no espaço entre os incisivos superiores e primeiro molar superior direito. Após ativações, de acordo com o tipo de força e tempo experimental, os animais foram mortos. Mediu-se a espessura do ligamento periodontal por meio de microscopia histomorfométrica quantitativa na raiz vestibular intermediária do primeiro molar superior direito do rato, na região distal (tração) e macroscópica, no espaço resultante entre os primeiro e segundo molares superiores direitos. A metodologia empregada permite concluir que as mensurações microscópicas são mais precisas e seguras para determinar o deslocamento na movimentação dentária induzida.
This study analyzed the amount of displacement, by measuring macroscopic and microscopic, after induced tooth movement. Both groups GI (continuous forces) and GII (interrupted continuous force) comprised of 30 rats, Wistar, were subdivided according to the experimental period of 8, 16 and 24 days. Each group comprised of ten animals, as well as the control group (CG), totaling 70 animals. The appliance used to obtain the displacement, was developed by Heller and Nanda. The nickeltitanium (NiTi) coil springs were installed in the space between the upper incisors and the upper first right molar. After activation, according to the type of force and experimental time, animals were sacrificed. A quantitative histomorphometric microscopy was used to the measurement of the periodontal ligament thickness in the mesiobuccal root of the first upper right molar of the rat, in the distal and macroscopic region, at reached space between the first and second upper right molars. The microscopic measurements are accurate and reliable to determine the displacement in the induced tooth movement.
Selaimen, Cássio Rodrigo Panitz [UNESP]. "Avaliação histopatológica comparativa do periodonto de sustentação de ratos jovens com hipocacemia e hipovitaminose D experimentais, frente ao movimento dentário." Universidade Estadual Paulista (UNESP), 2001. http://hdl.handle.net/11449/104530.
Full textFoi realizada uma investigação na resposta histológica do periodonto de sustentação de 30 ratos da raça Wistar submetidos a condições nutricionais com ou sem deficiência de cálcio e vitamina D. Os primeiros molares inferiores direitos dos ratos receberam dispositivos ortodônticos (colocados entre o primeiro molar inferior e o incisivo central do mesmo lado, na mandíbula), constituídos de molas de níquel-titânio que liberam em torno de 50g de força durante os períodos de 1, 7 e 14 dias. Os molares do lado esquerdo não receberam aparelho. Os ratos do grupo experimental foram submetidos à dieta deficiente em cálcio e vitamina D, durante os 30 dias que precederam a instalação do dispositivo ortodôntico, assim como durante os dias do experimento. Sob as mesmas condições ortodônticas, os ratos do grupo controle receberam uma dieta equilibrada. Os resultados evidenciaram que a resposta morfológica não foi alterada na seqüência dos seus eventos, mostrando significantes diferenças na estrutura do ligamento periodontal e do osso alveolar, os quais se exacerbaram nos períodos mais longos (7 e 14 dias). O estudo mostrou, ainda, que a estrutura do cemento não foi influenciada pela deficiência de cálcio e vitamina D. O fenômeno de aposição óssea parece ser aquele que discriminou as maiores diferenças entre os grupos controle e experimental. Para todos os grupos e períodos, a inflamação esteve sempre presente.
Orthodontic tooth movement is dependent on bone remodeling. Physiologic potential for bone remodeling is dependent on a balanced Calcium and vitamin D diet. Imbalances of these components are common among children and adolescents today. To evaluate the influences of the deficient diet periodontal tissues was studied. 30 Wistar rats received a NiTi orthodontic coil spring producing 50 gr. of force to moving the lower first right molar against the lower incisor during 1, 7 and 14 days. The lower first left molar was free os appliance. Fifteen specimens who served as controls were fed with a standardized balanced diet while the experimental group had a deficient calcium and vitamin D diet. The histopathologic evaluation on the stained sections with H&E and trycromic of Masson showed that Ca and Vitamin D had a marked influence on the bone turnover surrounding the molar, subject to orthodontic movement. The findings show a significant reduction of formative bone on the interradicular bone crest. There were no differences in resting and resortion bone surfaces but the cement exhibited less resorptive areas in the experimental group. In the left side alveolar bone was substtituided by inflamatory cells. This study indicated that a compromised bone remodeling occurs during orthodontic treatment when there is a diet restriction in calcium and Vitamin D.