Orientador: Lídia Parsekian Martins / Banca: Luiz Gonzaga Gandini Junior / Banca: Orlando Motohiro Tanaka / Resumo: Objetivo: Avaliar o relaxamento de tensão de molas T de β-Ti em 12 semanas pela mensuração de seus ângulos e avaliar a modificação do sistema de força em molas T com helicoides em áreas de alta tensão após 48 horas. Materiais e Métodos: Dois capítulos foram elaborados, sendo um para cada objetivo proposto. Resultados: O tempo influenciou as angulações mensuradas (p<0,001), sendo que o grupo imediato foi diferente dos demais grupos avaliados. Houve diferenças entre os ângulos (p<0,001), pois cada um corresponde a uma região da mola. O tempo teve uma interação significante com a deformação dos ângulos das molas (p<0,001). A avaliação do sistema de força das molas T com helicoides foi observado que houve interação entre o tempo e os grupos para os momentos (p<0,001), forças (p=0,018) e M/F (p<0,047), bem como ambos interagiram na desativação das molas nos momentos (p<0,001) e M/F (p=0,006) mas não na força (p=0,14). Os helicoides diminuíram os momentos (p<0,001) e forças (p<0,001), aumentando a M/F (p<0,001), bem como interagiu na desativação das molas, diminuindo a proporção carga-deflexão dos momentos (p<0,001) e forças (p<0,001) produzidos, alterando a M/F (p<0,009). Conclusão: As molas T apresentaram relaxamento de tensão e foram identificadas duas áreas com maior deformação, uma nas dobras entre as hastes verticais e horizontais das molas (ângulos 5 e 6) e outra nas dobras realizadas na haste horizontal (ângulos 8 e 9). A adição de helicoides reduziu a força horizontal e proporção carga/deflexão das molas; o momento produzido assim como a perda de momento por desativação, também foram reduzidos; a proporção momento/força aumentou e se tornou mais estável durante a desativação da alça. / Abstract: Objective: Evaluate the stress relaxation of T-loop springs over 12 weeks and evaluate the modification in force system T-loop springs with helices added in areas of higher stress after 48 hours. Materials and Methods: Two research papers were prepared and used for the evaluation of aims presented. Results: The time influenced the measured angles (p<.001), and the group immediate was different from the other groups evaluated. There were differences between the angles (p<.001), as each corresponds to a region of the spring. Time was a significant interaction with the deflection angles of the springs (p<.001). The evaluation of system force of T-loop springs with helix was observed that there was an interaction between time and groups for moment (p<.001), force (p=.018) and M/F (p<.047), and both interacted in the deactivation of the springs in moment (p<.001) and M/F (p=.006) but not in force (p=0.14). The helix moments decreased (p<.001), and forces (p<.001) by increasing the M/F (p<.001) and interacted in the deactivation of the springs, reducing the proportion of load-deflection moment (p<.001) and force (p<.001) produced by changing the M/F (p<.009). Conclusion: T-loop springs showed stress relaxation and two areas were identified with greater deformation, one in bends between the vertical and horizontal segments (angles 5 and 6) and another in bends made in the other horizontal segment (angle 8 and 9). The addition of helix reduced horizontal force ratio and load-deflection of the springs, the moment produced as well as loss of time for deactivation were also reduced, the M/F ratio increased and became more stable during the deactivation the spring. / Mestre

Orientador: Vania Celia Vieira de Siqueira / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-07T08:53:04Z (GMT). No. of bitstreams: 1 Goncalves_FernandoAntonio_D.pdf: 1152843 bytes, checksum: 7c84536fbb2ad97f300dd29fec4685b9 (MD5) Previous issue date: 2006 / Resumo: Dentre as deformidades esqueléticas com indicação para o tratamentoortodôntico-cirúrgico encontra-se a maloclusão esquelética do tipo Classe III, podendo ocorrer devido à retrusão maxilar, protrusão mandibular ou uma combinação de ambas, comprometendo a harmonia facial e a função do sistema estomatognático. Com o aperfeiçoamento das técnicas cirúrgicas, os resultados dos tratamentos mostram-se cada vez mais previsíveis e estáveis, contudo a literatura mostra muitas variáveis que podem influenciar na estabilidade do tratamento ortodôntico-cirúrgico. Além disso, à medida que os pacientes estão obtendo um acesso cada vez maior a esta opção terapêutica para as maloclusões do tipo Classe III, julgamos importante avaliar sua estabilidade em 20 pacientes, sendo 11 do sexo masculino e 9 do feminino, com média de idade de 26 anos e 1 mês, submetidos inicialmente ao tratamento ortodôntico para descompensação dentária, com o subseqüente tratamento cirúrgico combinado de maxila e mandíbula, utilizando fixação interna rígida, e finalização ortodôntica. As telerradiografias, obtidas em norma lateral, pertencentes ao arquivo do CEDEFACE, realizaram-se antes da cirurgia, no pós-operatório imediato e no mínimo 6 meses após a cirurgia, com uma média de período pós-cirúrgico tardio de 27 meses. Avaliaram-se dezenove grandezas cefalométricas, e os resultados foram analisados estatisticamente. A cirurgia de avanço maxilar mostrou-se um procedimento muito estável. A estabilidade do recuo mandibular ficou comprometida no sentido horizontal, com recidiva de 37,75% no ponto B, e de 45,85% no ponto Pg, devido ao giro anti-horário da mandíbula entre os períodos pós-operatórios, ocorrido pela melhor intercuspidação pós-cirúrgica e adaptação muscular do paciente à nova posição esquelética, provocando um reposicionamento mais anterior da mandíbula. Os resultados apresentaram as mesmas tendências para ambos os sexos. Concluímos que no tratamento cirúrgico combinado da maloclusão do tipo Classe III, o procedimento realizado na maxila mostrou-se muito estável, e na mandíbula a estabilidade ficou comprometida no sentido horizontal, devido ao seu giro anti-horário; não foram evidenciadas diferenças estatísticas na estabilidade cirúrgica entre os sexos / Abstract: Amongst the skeletal deformities requiring orthosurgical treatment are the Class III malocclusions, which usually occur due to either maxillary retrusion, mandibular protrusion or a combination of both. As a result, both facial harmonyand stomatognathic function are impaired by such characteristics. As the surgicaltechniques improve, the treatment outcomes are found to be increasinglypredictable and stable. Many variables regarding such a malocclusion are reported by the literature as factors influencing the stability of the orthosurgical treatment. Also, as the patients have been obtaining more access to orthodontic treatment, particularly involving Class III malocclusions, we believe it is important to assess the surgical stabilisation. Twenty skeletal Class III patients (11 males and 9females) with a mean age of 22.1 years had been initially submitted to orthodontic treatment for dental decompansation so that maxillo-mandibular surgical treatment, using rigid internal fixation, could be performed later on, followed by a postsurgical orthodontic finishing. Pre and postsurgical lateral teleradiographs were obtained from the CEDEFACE¿s archives. Also, postsurgical radiographs taken at least 6 months after the surgery were used, with a mean late postsurgical period of 27 months. Nineteen cephalometric measurements were evaluated, and the results were statistically analysed. Maxillary advancement was thought to be a stable procedure. However, the stability of the mandibular setback was impaired in relation to the horizontal plane as evidenced by 37.75% and 45.85% of relapse for points B and Pg, respectively. The increased anterior repositioning of the mandible was due to its counterclockwise rotation, which had occurred during the postsurgical period as a result of the increased intercuspation following surgery. Additionally, the patient¿s muscular adjustment to the new skeletal positioning played an important role. The cephalometric measurements found for males showed similar trends in comparison with those found for females. Regarding the combined surgical treatment for Class III malocclusions, we can conclude that the procedure carried out on the maxilla was stable, although the mandibular stability was impaired in relation to the horizontal plane due to the counterclockwise rotation; no statistical differences in the surgical stability were observed between males and females / Doutorado / Ortodontia / Doutor em Radiologia Odontológica

Orientador: Marcelo Marotta Araújo / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-21T02:42:48Z (GMT). No. of bitstreams: 1 Goncalves_GabrielaMayrink_D.pdf: 1020337 bytes, checksum: e64ba5c1f5cc4b3d4faa53cca8170c92 (MD5) Previous issue date: 2012 / Resumo: Análises cefalométricas constituem um importante passo no planejamento pré-operatório de cirurgias ortognáticas. A partir da década de 80, traçados cefalométricos digitais foram incorporados e tornaram-se populares entre ortodontistas e cirurgiões. O Dolphin Imaging Software® (Chatsworth, California) é um dos programas computacionais mais comumente utilizados em todo o mundo para fins de planejamento e previsão do resultado pós-operatório. Para a análise cefalométrica, é necessária a digitalização de teleradiografias de perfil. Este trabalho, dividido em três capítulos, analisou no Dolphin Imaging Software: 1) se há diferença nas imagens digitalizadas por câmeras digitais ou scanners para uso neste programa 2) a inclinação ântero-posterior de incisivos centrais superiores e inferiores no pré-operatório imediato de pacientes Classe II de Angle submetidos à cirurgia de avanço mandibular e; 3) a recidiva de cirurgias de avanço maxilar em pacientes Classe III de Angle nos quais um cimento de fosfato de cálcio foi utilizado como material de enxertia. Para a realização do primeiro estudo foram utilizadas 10 teleradiografias de perfil escaneadas e fotografadas. Traçados cefalométricos foram realizados e medidas lineares e angulares foram analisadas. Os testes t-Student e Wilcoxon foram aplicados e concluiu-se que ambos os métodos podem ser utilizados para a digitalização das imagens, sem diferenças estatisticamente significantes entre os mesmos. O segundo estudo utilizou 30 teleradiografias de perfil de pacientes Classe II no pré-operatório imediato de cirurgias de avanço mandibular. Foram realizados os traçados digitais e a inclinação dos incisivos superiores e inferiores foi analisada por meio de medidas angulares e lineares. Após aplicados os testes estatísticos (t Student), concluiu-se que os incisivos inferiores, em sua maioria, estavam compensados, ou seja, demonstravam uma inclinação mais vestibular, enquanto que os incisivos superiores estavam dentro das medidas consideradas ideais, tratando-se de descompensação dentária. Por fim, o último estudo avaliou a recidiva do movimento de avanço de maxila em 8 pacientes Classe III em que um cimento de fosfato de cálcio foi utilizado como material de enxertia. Foram realizados os traçados cefalométricos das radiografias pré-operatórias e pós-operatórias imediatas e tardias e medidas lineares e angulares que ditam o posicionamento maxilar foram avaliadas. Após realizado o teste estatístico de Tukey (ANOVA), pode-se concluir que apenas em 1 medida foi observada recidiva do movimento, podendo esta técnica ser considerada estável / Abstract: Cephalometric analyzes are an important step in preoperative planning of orthognathic surgery. From the 80's, digital cephalometric tracings were incorporated and became popular among orthodontists and surgeons. Dolphin Imaging Software (Chatsworth, California) is one of the computer programs most commonly used worldwide for planning purposes and forecasting the postoperative result. For cephalometric analysis is needed to digitize cephalometrics radiographs. This study was divided in three chapters, analyzed at Dolphin Imaging Software: 1) whether there are differences in the scanned images by digital cameras or scanners for use in this program, 2) the anteroposterior inclination of the upper and lower central incisors in the immediate preoperative patients with Angle Class II underwent mandibular advancement surgery and 3) relapse of maxillary advancement surgery in patients with Class III malocclusion in which a calcium phosphate cement was used as grafting material. For the first study were used 10 cephalometric radiographs scanned and photographed. Cephalometric tracings were performed, and linear and angular measurements were analyzed. The Student t test and Wilcoxon was applied and was concluded that both methods can be used for the digitization of images without statistically significant differences between them. The second study used 30 immediate preoperative cephalometric radiographs of Class II patients that were submitted to mandibular advancement surgery. Digital tracings were made and the inclination of the upper and lower incisors was analyzed by means of angular and linear measurements. After applied the statistical tests (Student t test), it was concluded that the lower incisors were mostly compensated, showing a labially inclination while the upper incisors were at the "ideal" position. Finally, the last study examined the relapse of maxillary advancement surgery of 8 Class III patients where calcium phosphate cement was used as a grafting material. We carried out the cephalometric analysis of radiographs of preoperative and postoperative early and late, and linear and angular measurements that dictate the maxillary positioning were evaluated. After performing the Tukey statistical test (ANOVA), it was concluded that although in one measure relapse were observed this is an effective method to decrease relapse in maxillary orthognathic surgery / Doutorado / Cirurgia e Traumatologia Buco-Maxilo-Faciais / Doutora em Clínica Odontológica

Orientador: Vania Celia Vieira de Siqueira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-04T00:44:28Z (GMT). No. of bitstreams: 1 Sousa_MeireAlvesde_M.pdf: 711072 bytes, checksum: 46ae7204f05c9e14c19bfd81de9b1add (MD5) Previous issue date: 2004 / Mestrado / Ortodontia / Mestre em Ortodontia

Magister Scientiae Dentium - MSc(Dent) / The development of a uniform method of epidemiological assessment and grading of malocclusion has been of interest for several decades. Recently, Daniels and Richmond (2000) proposed a new orthodontic index namely the Index of Complexity, Outcome and Need (ICON). Their aim was to develop a single index for assessing treatment inputs and outcomes.The aim of this study was to critique the ICON and to assess to the extent to which each component of the ICON fulfils the ideal requirements of the ideal index as identified in a World Health Organization Report (WHO, 1966). The study was performed in three parts: 1) a gold standard was established to test reliability and validity of the ICON; 2) to assess ease of use and simplicity of the index; 3) and to test the applicability of the index on patients and study casts. The results showed that the ICON identified 25% of the cases as &lsquo;no treatment&rsquo;, as apposed to the 100% of the gold standard. Validity of the index was shown to be &lsquo;poor&rsquo; for complexity (? = 0.2) and degree of improvement (? = 0.34) and &lsquo;excellent&rsquo; for outcome. Reliability was high for all the components except for treatment need (? = 0.63). This study concluded that except for complexity and degree of improvement, the index performed well with respects to reliability, validity (of treatment outcome), ease of use and simplicity and applicability to patient and study casts. / South Africa

Magister Scientiae Dentium - MSc(Dent) / The controversy surrounding the role of malocclusion and orthodontic treatment in temporomandibular joint (TMJ) dysfunction led to this study. The purpose of this study was to establish the prevalence and compare the status of signs and symptoms of TMJ dysfunction in four groups of adolescents and young adults. The groups consisted of 14 persons with normal occlusions, 23 with untreated malocclusions, 20 with malocclusions currently undergoing treatment, and 18 with treated malocclusions. The Helkimo index was used to collect the TMJ dysfunction data. The results showed that the untreated malocclusion group had the most number of persons with signs and symptoms of dysfunction, but the differences between the groups in the distribution of persons according to the anamnestic and clinical dysfunction indices were not statistically significant. There were also no statistically significant differences in the distribution of signs and symptoms between boys and girls. According to anamnesis, the most frequently reported symptoms were joint sounds and headaches or neckaches occurring more than twice a week. Amongst the clinical signs and symptoms, the most commonly occurring were joint sounds on auscultation and muscle tenderness on palpation. In light of the small study sample and the absence of any substantial differences between the four groups, the role of malocclusion and orthodontic treatment in the aetiology of TMJ dysfunction remains obscure. / South Africa

El tratamiento de compensación o camuflaje de las Maloclusiones de Clase III, estuvo orientado tradicionalmente a la extracción de primeras premolares inferiores, distalización de caninos y lingualización de incisivos inferiores con la finalidad de obtener un overbite y overjet aceptables. El propósito de este reporte es describir el diagnóstico y plan de tratamiento de una maloclusión clase III, en un paciente adulto, soportado por una revisión bibliográfica. El caso fue tratado con el sistema Multiloop Edgewise Arch Wire (MEAW) y se realizaron exodoncias de terceras molares inferiores. El sistema MEAW utiliza arcos con dobleces colocados en los espacios dentarios interproximales, desde la parte distal de los incisivos laterales hasta la última pieza en el sector posterior, al cual se le realizan ciertas activaciones según la maloclusión. Podemos concluir que con este sistema podemos compensar los casos de Clase III, mediante la reconstrucción del plano oclusal, evitando así el realizar exodoncias de premolares inferiores controlando el efecto de lingualización de los incisivos inferiores para generar correcto overjet y overbite y relaciones caninas Clase I. / The treatment of compensation or camouflage of Class III malocclusions was traditionally oriented to the extraction of first lower premolars, canine distalization and lingualization of lower incisors in order to obtain an acceptable overbite and overjet. The purpose of this report is to describe the diagnosis and treatment plan of a Class III malocclusion in an adult patient, supported by a literature review. The case was treated with the Multiloop Edgewise Arch Wire (MEAW) system and extraction of lower third molars. The MEAW system uses arches with Loops placed in the interproximal dental spaces, from the distal part of the lateral incisors to the last piece in the posterior sector, to which certain activations are performed according to the malocclusion. We can conclude that with this system we can compensate Class III cases, through the reconstruction of the occlusal plane, avoiding extraction of lower premolars controlling the lingualization effect of the lower incisors to generate correct overjet and overbite and canine relations Class I. / Trabajo académico

May 2008. A thesis submitted to the College of Dental Medicine of Nova Southeastern University of the degree of Master of Science in Dentistry.

June 2008. A thesis submitted to the College of Dental Medicine of Nova Southeastern University of the degree of Master of Science in Dentistry.

June 2010. A thesis submitted to the College of Dental Medicine of Nova Southeastern University in partial fulfillment of the requirements for the degree of Master of Science [Dental Medicine].