Comparison of Treatment Effects with Modified C-Palatal Plates vs Greenfield Molar Distalizer Appliances in Adolescents.

Objectives: The aim of study was to evaluate skeletodental and soft tissue treatment effects and the amount of maxillary molar distalization with modified C-palatal plates vs. Greenfield molar distalizer appliances in adolescents. Study design: The samples consisted of pre- and posttreatment lateral cephalograms collected from 39 patients with Class II malocclusion. The MCPP group was comprised of 21 patients (mean age: 11.7 ± 1.3 years) treated with MCPP appliances while the GMD group included 18 patients (mean age: 11.2 ± 0.9 years) treated with GMD. Fixed orthodontic treatment started with the distalization process in both groups. From each cephalograpm, twenty-nine variables were measured for analysis and then the two groups were compared. Descriptive statistics, a paired t-test, and multivariate analysis of variance were performed to compare the treatment effects within and between the groups. Results: There was significant treatmentrelated change in the sagittal position of the maxilla and the mandible within each group. However, there were no statistically significant inter-group differences. The mean maxillary first molar distalization was 3.96 mm in the MCPP group vs. 2.85 mm in the GMD group. Both groups showed minimal distal tipping, but the maxillary incisors were significantly extruded by 3.04 ± 0.89 mm (P < .001) in GMD group. There was no significant difference in treatment duration between the groups. Conclusions: The maxillary first molars of both the MCPP and GMD groups were effectively distalized and there were significant skeletal changes in the maxilla. However, the maxillary incisors were significantly extruded in the GMD group.

Tratamento compensatório de Classe III por meio de distalizador Carrière / Class III compensatory treatment through distalization with the Carrière appliance

A má oclusão de Classe III é considerada a mais complexa devido ao envolvimento das estruturas esqueléticas, dentárias ou ambas, trazendo como consequência uma face desarmoniosa. O objetivo deste trabalho foi descrever um caso clínico de um paciente Classe III esquelética, o qual não queria ser submetido à cirurgia ortognática e foi tratado compensatoriamente através de distalização com o uso do aparelho Carrière. Inicialmente, no arco superior foi selecionado aparelho fixo, sistema autoligado, prescrição Roth em slot .022", seguiu-se o alinhamento e nivelamento dos arcos e no arco inferior foi selecionado o dispositivo distalizador de Carrière para distalização em bloco dos segmentos. O aparelho foi utilizado durante 3 meses, após esse tempo, instalou-se bráquetes da prescrição MBT na arcada inferior para alinhamento e controle da inclinação dos incisivos. O caso foi finalizado em 24 meses, após remoção do aparelho, foram instaladas contenções de acetato na arcada superior e inferior.(AU)

Class III malocclusion is considered the most complex due to the involvement of skeletal and dental pattern or both structures, resulting in a disharmonious face. The objective of this study was to describe a clinical case of a skeletal Class III patient, who did not want to undergo orthognathic surgery and was treated compensatory through distalization with the Carrière appliance. Initially, in the upper arch were selected selfligating brackets system, Roth prescription on .022" slot size, followed by the alignment and leveling of the arches, in the lower arch the Carrière appliance was selected for distalization of the segments. The device was used for 3 months. MBT prescription brackets were installed in the lower arch for leveling and incisor control. The case was finalized in 24 months, after removal of the braces, acetate retainers were installed in the upper and lower arch.(AU)

Evaluación del distalador molar Belussi / Evaluation of Belussi's molar distalizer

La distalización de los molares superiores en mesogresión es una alternativa de tratamiento muy utilizado en nuestros días. Se conocen muchos métodos de distalización molar, estos han evolucionado notablemente y siguen siendo eficaces en el tratamiento. El objetivo de esta investigación fue evaluar los cambios dentales producidos por el distalador molar Belussi. El aparato fue empleado en 11 pacientes con una edad promedio de 12 años, distoclusión de molares causada por mesogresión, y con tipo facial favorable. A cada uno se le confeccionaron modelos de estudio y se le realizaron fotografías, radiografías panorámicas y telerradiografías laterales de cráneo, antes y después del tratamiento, para analizar las variables objeto de estudio. El aparato se mantuvo en boca hasta lograr un sobretratamiento de la relación molar. Finalmente, se obtuvo una distalización molar de 4,45 mm acompañada de una inclinación de 5,55°, con una pérdida mínima de anclaje temporal(AU)

The distalization of the superior molars in mesial migration is a useful alternative treatment nowadays. Many methods of molar distalization are known. They have significantly evolved and they are still effective in the treatment. The objective of this investigation was to evaluate the dental changes produced by Belussi Molar Distalizer. The appliance was used in 11 patients with an average of 12 years-old, distoocclusion of molars caused by mesial migration and with a favorable facial type. Study models were made for each one of them and pictures, panoramic x-rays and lateral X-rays of the skull were taken, before and after the treatment, to analyze the variables object of study. The appliance was kept in the mouth until achieving an overtreatment of the molar relation. Finally, a molar distalization of 4.45 mm accompanied with an inclination of 5.55° was obtained, with a minimum loss of temporary anchorage(AU)