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Influência do tratamento ortodôntico pré-cirúrgico sobre o perfil cutâneo e dento-esquelético de pacientes com anomalias de classe III
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TITULO: Influência do tratamento ortodôntico pré-cirúrgico sobre o perfil cutâneo e dento-esquelético de pacientes com anomalias de Classe III. 1. OBJETIVOS: Este estudo cefalométrico teve como objetivos avaliar as alterações produzidas pelo tratamento ortodôntico pré – cirúrgico sobre as variáveis cefalométricas dos tecidos moles e dos tecidos dento – esqueléticos do terço inferior da face, em pacientes com maloclusões de Classe III. 2. MATERIAL E MÉTODOS: A amostra, constituída por 40 adultos, foi dividida em três grupos: 1) N: Pacientes sem extracções 2) E: Pacientes com extracções para razões ortodônticas. 3) E-NO: Pacientes com dentes ausentes por razões não ortodônticas. As teleradiografias de perfil da face antes e depois do tratamento foram sobrepostas utilizando o programa Adobe Photoshop™. O programa cefalométrico Nemoceph foi utilizado para calcular as medições. A influência do tratamento sobre as medições foi determinada utilizando testes t de Student. Para efectuar a comparação entre os três grupos, foi utilizada uma análise ANOVA. O coeficiente de correlação de Spearman foi utilizado para examinar a relação entre as alterações nos dentes e nos tecidos moles. 3. RESULTADOS: No grupo E, houve uma retração e retro-inclinação do incisivo superior, com uma retração do lábio superior. Houve uma proinclinação do incisivo inferior e uma mesialização do molar superior nos três grupos. Foi observada uma rotação posterior da mandíbula com aumentos da altura facial total e inferior nos grupos E e E-NO. 4. CONCLUSÕES: 1) O ponto lábio superior retraiu 0,20 mm por cada mm de retração do incisivo superior no grupo E. 2) O lábio inferior tornou se mais protrusivo 0,38 mm e 0,40 mm por cada mm de avanço do incisivo inferior nos grupos N e E-NO respectivamente. 3) O plano de tratamento cirúrgico deve ser decidido apenas após a fase de tratamento ortodôntico pré-cirúrgico.
TITLE: The influence of pre-surgical orthodontic treatment on the soft tissue and dento-skeletal profile in patients with Class III anomalies. 1. OBJECTIVES: The objective of this cephalometric study was the evaluation of the alterations produced by pre-surgical orthodontic treatment in soft tisssue and dento-skeletal cephalometric variables in the lower third of the face, in patients with Class III malocclusions. 2. MATERIAL AND METHODS: The sample included 40 adults and was divided into three groups: 1) N: Patients without extractions 2) E: Patients with extractions for orthodontic reasons 3) E-NO: Patients with teeth extracted for non orthodontic reasons. The lateral cephalograms before and after treatment were superimposed using the program Adobe Photoshop™. The cephalometric variables were measured using the program Nemoceph. Student t tests were used to determine the influence of the orthodontic treatment on the cephalometric variables. The three groups were compared before and after treatment using the ANOVA analysis. The relationship between the changes in the hard and soft tissues was examined using the Spearman coefficient of correlation. 3. RESULTS: In group E, there was a retraction and retroinclination of the upper incisor with retraction of the upper lip. There was a proinclination of the lower incisor and an advancement of the upper molar in all three groups. There was a posterior rotation of the mandible with increase in total and inferior facial heights in the groups E and E-NO. 4. CONCLUSIONS. 1) The upper lip retracted 0.20 mm for each mm of upper incisor retraction in the group E. 2) The lower lip advanced 0.38 mm e 0.40 mm for each mm that the lower incisor advanced, in the groups N e E-NO respectively. 3) The surgical treatment plan should be decided only after the termination of the phase of pre-surgical orthodontic treatment.
TITLE: The influence of pre-surgical orthodontic treatment on the soft tissue and dento-skeletal profile in patients with Class III anomalies. 1. OBJECTIVES: The objective of this cephalometric study was the evaluation of the alterations produced by pre-surgical orthodontic treatment in soft tisssue and dento-skeletal cephalometric variables in the lower third of the face, in patients with Class III malocclusions. 2. MATERIAL AND METHODS: The sample included 40 adults and was divided into three groups: 1) N: Patients without extractions 2) E: Patients with extractions for orthodontic reasons 3) E-NO: Patients with teeth extracted for non orthodontic reasons. The lateral cephalograms before and after treatment were superimposed using the program Adobe Photoshop™. The cephalometric variables were measured using the program Nemoceph. Student t tests were used to determine the influence of the orthodontic treatment on the cephalometric variables. The three groups were compared before and after treatment using the ANOVA analysis. The relationship between the changes in the hard and soft tissues was examined using the Spearman coefficient of correlation. 3. RESULTS: In group E, there was a retraction and retroinclination of the upper incisor with retraction of the upper lip. There was a proinclination of the lower incisor and an advancement of the upper molar in all three groups. There was a posterior rotation of the mandible with increase in total and inferior facial heights in the groups E and E-NO. 4. CONCLUSIONS. 1) The upper lip retracted 0.20 mm for each mm of upper incisor retraction in the group E. 2) The lower lip advanced 0.38 mm e 0.40 mm for each mm that the lower incisor advanced, in the groups N e E-NO respectively. 3) The surgical treatment plan should be decided only after the termination of the phase of pre-surgical orthodontic treatment.
Descrição
Tese de mestrado, Medicina Dentária, Universidade de Lisboa, Faculdade de Medicina Dentária, 2012
Palavras-chave
Ortodontia Teses de mestrado - 2012