RESUMO
AIM: This study aimed to compare the dentoskeletal and soft tissue changes promoted by the Distal Jet and Pendulum, followed by fixed appliances, in class II malocclusion treatment, evaluated in relation to an untreated control group. MATERIALS AND METHODS: Group 1 comprised 20 patients (15 female; 5 male) with class II malocclusion, at an initial mean age of 12.77 years. These patients were treated with the Distal Jet followed by fixed appliances for a mean period of 4.15 years. Group 2 consisted of 15 patients (10 female; 5 male) with class II malocclusion, at an initial mean age of 13.42 years, treated with the Pendulum followed by fixed appliances for a mean period of 4.41 years. Group 3 comprised 16 subjects (8 female; 8 male), with class II malocclusion, not submitted to any orthodontic treatment. This group had an initial mean age of 12.25 years. The mean observation period was 3.73 years. Comparison of the three groups was performed by one-way ANOVA followed by Tukey tests. RESULTS: The Distal Jet appliance showed more palatal tipping of the maxillary incisors than the Pendulum. The treated groups showed more overjet reduction and improvement of molar relationship than the control group. CONCLUSION: It was concluded that the effects of these two appliances in Class II malocclusion correction are very similar. CLINICAL SIGNIFICANCE: Both Distal Jet and Pendulum appliances corrected the class II malocclusion with similar cephalometric treatment changes.
Assuntos
Má Oclusão Classe II de Angle , Sobremordida , Adolescente , Cefalometria , Criança , Feminino , Humanos , Masculino , Desenho de Aparelho Ortodôntico , Aparelhos Ortodônticos , Técnicas de Movimentação Dentária , Resultado do TratamentoRESUMO
El presente estudio evaluó los efectos de las suturas de base alar nasal (S.B.A.N) y V-Y labial en el mantenimiento de la distancia entre las bases alares nasales y de la espesura del bermellón del labio. Fueron evaluados 9 pacientes, de los cuales 4 recibieron las suturas descritas anteriormente y los 5 restantes recibieron suturas simples. Fueron evaluadas las medidas de las bases alares nasales (B. A. N) y la del bermellón del labio superior (E.V.L.) en las etapas del preoperatorio, del post operatorio inmediato y de 7 y450 días después. Los resultados con respecto a las medidas de las B.A.N se mostraron estables durante todo el periodo de evaluación en el grupo que recibió las suturas S.B.A.N y S.V-Y.L., mientras que en el grupo que recibió suturas simples hubo un aumento de esta medida en el post operatorio y una disminución después de 450 días. El grupo con S.V-Y.L. y S.B.A.N presentó un aumento significativo de la E.V.L en el postoperatorio inmediato, reduciendo levemente después de 7 días, con una pérdida significativa en la evaluación final, mostrando un valor menor del que obtenido en la evaluación preoperatoria. Las S.BA.N se mostraron efectivas en corto y mediano plazo en el control del alargamiento nasal no deseado en pacientes sometidos a la expansión quirúrgicamente asistida (E.M.C.A). En el post operatorio inmediato existe un aumento del E.V.L, sin embargo, a largo plazo la reducción de la E.V.L ocurre en todos los pacientes con E.M.C.A, independiente del tipo de sutura utilizada.
This study aimed to evaluate the effects of the Nasal Alar Bases suture (N.A.B.S.) and V-Ylip suture (V-Y.L.S.) in the maintenance of the distance between the nasal alar bases (N.A.B.) and the red lipsdisplay (R.L.D.) in patients operated for correction of crossbite with maxillary atresia. We evaluated 9 patients,4 who received the above mentioned sutures, and 5 who received simple sutures. It was evaluated the measuresN.A.B. and R.L.D. in the preoperative phase, postoperative, and after 7 and 450 days. Measurements of N.A.B.were stable throughout the experimental period in N.A.B.S. and V-Y.L.S. group, while the group receivingsimple sutures there was an increase of this measure in the postoperative period and a decrease after 450days. The N.A.B.S. and V-Y.L.S. group showed a significant increase in R.L.D. in immediate postoperativeperiod, reducing slightly after 7 days, and presenting a significant loss in the final assessment, showing aneven lower value than the mean preoperative. N.A.B.S. was effective in the short and medium term in controllingunwanted nasal enlargement in patients undergoing E.M.C.A. In the immediate postoperative period, there isan increased R.L.D., but long-term reduction of the R.L.D. occurs in all E.M.C.A. patients, regardless of the typeof suture used.