Navegando por Assunto "Ortodontia corretiva"

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Acesso aberto (Open Access)
Alterations in plaque accumulation and gingival inflammation promoted by treatment with self-ligating and conventional orthodontic brackets
(Universidade Federal do Pará, 2015-04) CARDOSO, Mauricio de Almeida; SARAIVA, Patrícia Pinto; BRANGELI, Liliana Ávila Maltagliati; RHODEN, Fernando Kleinübing; COSTA, Carla Cristina Alvarenga ; NORMANDO, Antonio David Corrêa; CAPELOZZA FILHO, Leopoldino
Objective: The aim of the present study was to evaluate, comparatively, the periodontal response during orthodontic treatment performed with self-ligating and conventional brackets.Methods: Sixteen Caucasian individuals of both sexes, aged between 12 and 16 years old and in permanent dentition were selected. Eight individuals were treated with conventional brackets installed on the lower dental arch and self-ligating brackets on the upper arch. Another eight individuals received self-ligating brackets in the lower arch and conventional brackets in the upper arch. The subjects received material and instructions for oral hygiene. Visible plaque index (VPI), gingival bleeding index (GBI) and clinical attachment level (CAL) were evaluated just after installation of orthodontic appliances, and 30, 60 and 180 days later. Mann-Whitney test was used to compare differences between groups (self-ligating and conventional), twoway ANOVA followed by Tukey’s test was used to assess CAL at each site of each tooth. Significance level was set at 5%. Results: No significant changes were found with regard to the assessed parameters (VPI, GBI and CAL) in either one of the systems.Conclusion: No significant changes were found with regard to the periodontal response to orthodontic treatment for the variables assessed and between subjects receiving passive self-ligating and conventional brackets. All individuals had received oral hygiene instructions and had their periodontal conditions monitored.
Acesso aberto (Open Access)
Avaliação cefalométrica do perfil tegumentar e esquelético inicial e final de tratamento ortodôntico
(Universidade Estadual de Campinas, 1999-07-06) ALMEIDA, Haroldo Amorim de; ALMEIDA, Maria Helena Castro de; http://lattes.cnpq.br/0770202080280415
Was accomplished a study in 114 telerradiography of the head in lateral norm, of 57 Brazilian individuais, white, with Class 11, division 1 malocclusion (An.gle), submitted to orthodontic treatment according to the Tweed philosophy, with the purpose of evaluating the alterations to levei of the bony and soft-profile . The results demonstrated that among the angle Z and FMA an inverse correlation exists; when modifying the values of FMIA, Âng. Z suffers alterations of same degree and direction; altering the angle of the occlusal plan, they happen variations of similar value in FMA; any modification in ANB is accomplished by an alteration in AO-BO, of same magnitude and direction.
Acesso aberto (Open Access)
Changes in lower dental arch dimensions and tooth alignment in young adults without orthodontic treatment
(Universidade Federal do Pará, 2015-06) MAUAD, Bruno Aldo; SILVA, Robson Costa; ARAGÓN, Mônica Lídia Castro de; PONTES, Luana Farias; SILVA JÚNIOR, Newton Guerreiro da; NORMANDO, Antonio David Corrêa
Objective: The aim of this longitudinal study, comprising young adults without orthodontic treatment, was to assess spontaneous changes in lower dental arch alignment and dimensions. Methods: Twenty pairs of dental casts of the lower arch, obtained at different time intervals, were compared. Dental casts obtained at T1 (mean age = 20.25) and T2 (mean age = 31.2) were compared by means of paired t-test (p < 0.05). Results: There was significant reduction in arch dimensions: 0.43 mm for intercanine (p = 0.0089) and intermolar (p = 0.022) widths, and 1.28 mm for diagonal arch length (p < 0.001). There was a mild increase of approximately 1 mm in the irregularity index used to assess anterior alignment (p < 0.001). However, regression analysis showed that changes in the irregularity index revealed no statistically significant association with changes in the dental arch dimensions (p > 0.05). Furthermore, incisors irregularity at T2 could not be predicted due to the severity of this variable at T1 (p = 0.5051). Conclusion: Findings suggest that post-growth maturation of the lower dental arch leads to a reduction of dental arch dimensions as well as to a mild, yet significant, increase in dental crowding, even in individuals without orthodontic treatment. Furthermore, dental alignment in the third decade of life cannot be predicted based on the severity of dental crowding at the end of the second decade of life