RESUMO
INTRODUCTION: In several conditions, outcome stability is a great challenge for Orthodontics. Previous studies have reported that relapse commonly occurs along the years after orthodontic treatment finishing. OBJECTIVE: The aim of the present study was to evaluate in the long-term transversal dental arch changes of Class II division 1 patients treated with cervical headgear and fixed appliance. METHODS: Plaster study casts of 20 patients treated with cervical headgear without dental extractions were 3D-scanned and evaluated in three distinct times: initial (T1), immediate post-treatment (T2) and long-term retention (T3 - minimum 20 years). Transversal teeth distance of maxillary and mandibular canines, premolars and first molars were measured. RESULTS: A statistically significant increase during treatment was observed for all maxillary teeth transversal distances (p< 0.05). In turn, a significant reduction was observed in the long term (p< 0.05). For the mandibular teeth, canine transversal distance presented statistically significant constriction in the retention period (p< 0.05). Mandibular first molars distance was significantly expanded by treatment (p< 0.05) and remained stable in the long term. The changes observed for the other teeth or other times were considered not statistically relevant. CONCLUSIONS: For the accessed sample, transversal changes occurred during treatment and retention phases in Class II division 1 patients treated with cervical headgear and fixed appliance. Relapse was considered statistically relevant, even with the institution of a retention protocol.
Assuntos
Aparelhos de Tração Extrabucal , Má Oclusão Classe II de Angle , Dente Pré-Molar/cirurgia , Cefalometria , Humanos , Má Oclusão Classe II de Angle/diagnóstico por imagem , Má Oclusão Classe II de Angle/terapia , Recidiva , Resultado do TratamentoRESUMO
ABSTRACT Introduction: In several conditions, outcome stability is a great challenge for Orthodontics. Previous studies have reported that relapse commonly occurs along the years after orthodontic treatment finishing. Objective: The aim of the present study was to evaluate in the long-term transversal dental arch changes of Class II division 1 patients treated with cervical headgear and fixed appliance. Methods: Plaster study casts of 20 patients treated with cervical headgear without dental extractions were 3D-scanned and evaluated in three distinct times: initial (T1), immediate post-treatment (T2) and long-term retention (T3 - minimum 20 years). Transversal teeth distance of maxillary and mandibular canines, premolars and first molars were measured. Results: A statistically significant increase during treatment was observed for all maxillary teeth transversal distances (p< 0.05). In turn, a significant reduction was observed in the long term (p<0.05). For the mandibular teeth, canine transversal distance presented statistically significant constriction in the retention period (p<0.05). Mandibular first molars distance was significantly expanded by treatment (p<0.05) and remained stable in the long term. The changes observed for the other teeth or other times were considered not statistically relevant. Conclusions: For the accessed sample, transversal changes occurred during treatment and retention phases in Class II division 1 patients treated with cervical headgear and fixed appliance. Relapse was considered statistically relevant, even with the institution of a retention protocol.
RESUMO Introdução: Em várias condições, a estabilidade dos resultados é um grande desafio para a Ortodontia. Estudos prévios relataram que a recidiva ocorre, comumente, ao longo dos anos, após o término do tratamento ortodôntico. Objetivo: O objetivo da presente pesquisa foi avaliar as alterações transversais da arcada dentária em longo prazo de pacientes Classe II, divisão 1, tratados com aparelho extrabucal cervical e aparelho fixo. Métodos: Modelos de gesso de 20 pacientes tratados com AEB cervical, sem extrações dentárias, foram escaneados e avaliados em três momentos distintos: inicial (T1), pós-tratamento imediato (T2) e acompanhamento de longo prazo (T3, mínimo de 20 anos). A distância transversal entre os caninos superiores e inferiores, pré-molares e primeiros molares foi medida. Resultados: Foi observado aumento estatisticamente significativo durante o tratamento para todas as distâncias transversais dos dentes superiores (p < 0,05). Por sua vez, foi observada redução significativa em longo prazo (p < 0,05). Para os dentes inferiores, a distância transversal intercaninos apresentou constrição estatisticamente significativa no período de contenção (p < 0,05). A distância dos primeiros molares inferiores aumentou significativamente com o tratamento (p < 0,05) e permaneceu estável em longo prazo. As alterações observadas para os outros dentes ou outros tempos foram consideradas sem significância estatística. Conclusões: Para a amostra estudada, as alterações transversais ocorreram durante as fases de tratamento e contenção em pacientes Classe II, divisão 1, tratados com aparelho extrabucal de tração cervical e aparelho fixo. A recidiva foi considerada estatisticamente significativa, mesmo com a instituição de um protocolo de contenção.
RESUMO
This systematic review was focused on evaluating tooth autotransplantation, considering its impacts on the teeth, bone, soft tissues, and aesthetics in orthodontic patients. A bibliographic search was conducted without limitations on year of publication or language in the databases of PubMed, Web of Science, Scopus, Medline Complete, Cochrane, Clinical Trials, and Trials Central. For triage of articles, indications, surgical planning, orthodontic movement, risk factors for treatment, and long-term follow-ups were considered. For outcomes, the results with reference to teeth, alveolar bone, periodontal tissues, and esthetic satisfaction were considered. Risk of bias was evaluated using the methodological index for nonrandomized studies-MINORS. The results showed 10 controlled clinical trials, and no randomized clinical trials were found. The selected studies included 715 patients and 934 autotransplanted teeth among which there were premolars, molars, and anterior teeth evaluated in the long term, indicating that orthodontics associated with autotransplantation indicated a result that was generally clinically acceptable. The quality of the set of evidence was considered medium due to the presence of different methodological problems, risk of bias, and significant heterogeneity in the evaluated studies. There was a sufficient body of evidence that justified autotransplantation in patients who needed orthodontic movement. In teeth, there was an increase in root resorption influenced by orthodontics, but without impacting on the general clinical result in the long term. Bone and periodontal tissue do not appear to be affected by orthodontics. The patient's aesthetic satisfaction was not considered in the studies.
RESUMO
Resumo Objetivo: Avaliar a percepção estética em diferentes graus de protrusão e retrusão labial em um indivíduo negro do sexo masculino. Materiais e Métodos: Uma fotografia de perfil de um modelo negro do sexo masculino foi manipulada em graus de projeção e retrusão labial em programa de edição de imagens. No sentido ântero-posterior, as alterações foram realizadas apenas em lábios, na região limitada pelos ângulos naso-labial e mento-labial: em -5,0mm (perfil côncavo), -3,0mm (perfil levemente côncavo), 0mm (perfil reto), +3,0mm (perfil levemente convexo) e +5,0mm (perfil convexo). Um álbum fotográfico foi confeccionado e apresentado a uma amostra de 327 entrevistados leigos. Perguntou-se sobre a possibilidade de eles perceberem diferenças entre as imagens apresentadas, respondendo com sim ou não, com posterior eleição da imagem que mais os agradou e a que menos agradou esteticamente. Adicionalmente, foi solicitado que avaliassem todas as imagens com notas de 0 a 10. Resultados: As modificações foram passíveis de percepção por 90% dos avaliadores leigos, com maiores escores para os perfis faciais reto (7,38 ± 1,77) e levemente côncavo (7,39 ± 1,83), com semelhanças entre si (p>0,05). No perfil reto, escores significativamente menores foram registrados pelos avaliadores do sexo masculino (7,17 ± 1,74; p=0,01) e autodeclarados negros (6,99 ± 1,93; p=0,003). Conclusão: As simulações de retrusão e protrusão na posição labial podem gerar diferenças no perfil facial passíveis de percepção por indivíduos leigos, independente do sexo e etnia, verificando-se o perfil convexo como o menos atrativo (AU)
Abstract Purpose: To evaluate the aesthetic perception in different degrees of lip protusion and retrusion in a black male subject. Materials and Methods: The profile photograph of a black male model was manipulated in degrees of lip projection and retrusion in an image editing program. In the anteroposterior direction, the alterations were performed only on the lips, in the region limited by the nasolabial and mentolabial angles: in -5.0mm (concave profile), -3.0mm (slightly concave profile), 0mm (straight profile), +3.0mm (slightly convex profile) and +5.0mm (convex profile). A photographic album was assembled and presented to a sample of 327 lay people. They were asked about the possibility of perceiving differences in the images presented, answering with yes or no, and then selecting the image that most pleased them and the one least aesthetically pleased. Additionally, they were asked to rate all images with grades from 0 to 10. Results: Modifications were noticeable for 90% of lay evaluators, with higher scores for straight (7.38 ± 1.77) and slightly concave (7.39 ± 1.83) facial profiles, with similarities between them (p> 0.05). In the straight profile, significantly lower scores were recorded by male evaluators (7.17 ± 1.74; p = 0.01) and self-declared black (6.99 ± 1.93; p = 0.003). Conclusion: Retrusion and protrusion simulations in the lip position can generate differences in the facial profile that can be perceived by lay people, regardless gender, age and ethnicity, with the convex profile being the less attractive.(AU)
Assuntos
Humanos , Masculino , Ortodontia , Sorriso , Percepção VisualAssuntos
Ortodontia/tendências , Tomografia Computadorizada de Feixe Cônico/métodos , Pesquisa em Odontologia/economia , Pesquisa em Odontologia/tendências , Financiamento Governamental , Organização do Financiamento , Terapia Genética/métodos , Humanos , Japão , Imageamento por Ressonância Magnética/métodos , Transtornos Musculares Atróficos/terapia , Aparelhos Ortodônticos/efeitos adversos , Ortodontia/economia , Apoio à Pesquisa como Assunto , Reabsorção da Raiz/prevenção & controle , Transtornos da Articulação Temporomandibular/diagnóstico , Transtornos da Articulação Temporomandibular/genética , Transtornos da Articulação Temporomandibular/terapia , Terapia por Ultrassom/métodos , Ondas UltrassônicasAssuntos
Ortodontia , Fenda Labial/terapia , Fissura Palatina/terapia , Criopreservação/métodos , Pesquisa em Odontologia/educação , Humanos , Intercâmbio Educacional Internacional , Japão , Células-Tronco Mesenquimais/fisiologia , Ortodontia/educação , Técnica de Expansão Palatina , Transtornos da Articulação Temporomandibular/classificação , Transtornos da Articulação Temporomandibular/diagnóstico , Transtornos da Articulação Temporomandibular/terapia , Bancos de Tecidos , Engenharia Tecidual/métodos , Alicerces Teciduais , Dente , Reimplante Dentário/métodosRESUMO
The purpose of this study was to compare the shear bond strength of orthodontic metallic brackets photo-activated with two different light-curing sources at different exposure times: halogen light (XL 1500, 3M ESPE) and LED light (Ortholux, 3M Unitek). Sixty bovine permanent lower incisors were inserted into PVC tubes containing plaster. The buccal surfaces were cleaned with pumice and water, and then etched with 37 percent phosphoric acid gel. The XT Primer bonding agent (3M Unitek) was applied to the enamel surfaces and the metallic pre-coated brackets (Transbond APC II system, 3M Unitek) were attached to upper central incisors. The teeth were randomly divided into four groups (n=15). In Group I (Control), halogen light was used for 40 seconds, while in Groups II, III, and IV were light-cured with LED light unit for 40, 10, and 5 seconds, respectively. The teeth were stored in distilled water at 37°C for 24 hours. The brackets were submitted to shear bond strength test in universal testing machine (Instron) at a crosshead speed of 0.5 mm/minute. Shear bond strength means (MPa) were 4.87 for Group I; 5.89 for Group II; 4.83 for Group III, and 4.39 for Group IV. Tukey's test detected no statistically significant differences among the groups regarding the shear bond strength (p>0.05). Neither of the types of light-curing sources or exposure times influenced the shear bond strength of metallic brackets.
RESUMO
The purpose of this study was to compare the shear bond strength of orthodontic metallic brackets photo-activated with two different light-curing sources at different exposure times: halogen light (XL 1500, 3M ESPE) and LED light (Ortholux, 3M Unitek). Sixty bovine permanent lower incisors were inserted into PVC tubes containing plaster. The buccal surfaces were cleaned with pumice and water, and then etched with 37% phosphoric acid gel. The XT Primer bonding agent (3M Unitek) was applied to the enamel surfaces and the metallic pre-coated brackets (Transbond APC II system, 3M Unitek) were attached to upper central incisors. The teeth were randomly divided into four groups (n=15). In Group I (Control), halogen light was used for 40 seconds, while in Groups II, III, and IV were light-cured with LED light unit for 40, 10, and 5 seconds, respectively. The teeth were stored in distilled water at 37 degrees C for 24 hours. The brackets were submitted to shear bond strength test in universal testing machine (Instron) at a crosshead speed of 0.5 mm/minute. Shear bond strength means (MPa) were 4.87 for Group I; 5.89 for Group II; 4.83 for Group III, and 4.39 for Group IV. Tukey's test detected no statistically significant differences among the groups regarding the shear bond strength (p>0.05). Neither of the types of light-curing sources or exposure times influenced the shear bond strength of metallic brackets.
RESUMO
Alterações no tamanho mésio-distal e vestibulo-lingual dos dentes podem significar dificuldade no correto posicionamento dos incisivos na arcada. Este estudo propôs avaliar o equilíbrio dentário através do índice de PECK PECK (1975) em pacientes leucodermas portadores de maloclusão Classe I e Classe II, 1ª divisão de Angle. Foram selecionados 100 modelos de gesso da arcada inferior com apinhamento anterior em graus variados de pacientes não tratados ortodonticamente. As dimensões mésio-distal e véstibulo-lingual dos incisivos inferiores foram mensuradas com auxílio de paquímetro digital com graduação 0,01mm. Os resultados mostraram que o Grupo I apresentou discrepância nos incisivos centrais e laterais esquerdos em 86,67 por cento dos casos, os incisivos centrais direitos apresentaram discrepância em 82,23 por cento e os incisivos laterais direitos em 84,45 por cento dos casos. O Grupo II, 1 apresentou discrepância nos incisivos centrais esquerdos em 89,10 por cento e os incisivos centrais direitos em 87,28 por cento dos casos, os incisivos laterais esquerdos apresentaram discrepância em 83,64 por cento dos casos, uma incidência menor que os incisivos laterais direitos, com 85,46 por cento. Pode-se concluir que os incisivos laterais e centrais esquerdos apresentaram maior incidência de discrepância dentária para a maioria dos casos, quando comparados aos homólogos em ambos os grupos, e houve ausência de correlação total entre homólogos em ambos os grupos.