RESUMEN
A 28-year-old woman desired orthodontic retreatment for lip protrusion and excessive gingival display in both the anterior and posterior areas on full smiling. She had previously undergone an extraction orthodontic treatment for correction of open bite. She was diagnosed with skeletal Class â ¡ hyperdivergence. To mimic LeFort â maxillary impaction surgery, posterosuperior movement of the maxillary whole dentition was planned, and bodily distalization of both the maxillary and the mandibular whole dentitions to improve lip protrusion. A combination of lingual appliances, 2 appropriately fabricated power arms, and 1 midpalatal microimplant contributed to the posterosuperior intrusion and bodily distalization of the maxillary arch. With the use of lingual appliances, 2 lever arms, and 2 conventional microimplants, the mandibular arch was bodily distalized. The active treatment period was 37 months, and the results were stable 12 months after treatment.
Asunto(s)
Maloclusión Clase II de Angle , Métodos de Anclaje en Ortodoncia , Adulto , Cefalometría , Estética Dental , Femenino , Encía , Humanos , Labio , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos , Retratamiento , Sonrisa , Técnicas de Movimiento DentalAsunto(s)
Asimetría Facial/terapia , Maloclusión Clase II de Angle/terapia , Mordida Abierta/terapia , Métodos de Anclaje en Ortodoncia/instrumentación , Técnicas de Movimiento Dental/instrumentación , Cefalometría/métodos , Aleaciones Dentales/química , Implantes Dentales , Femenino , Estudios de Seguimiento , Humanos , Miniaturización , Níquel/química , Métodos de Anclaje en Ortodoncia/métodos , Alambres para Ortodoncia , Planificación de Atención al Paciente , Acero Inoxidable/química , Titanio/química , Adulto JovenAsunto(s)
Labio/patología , Maloclusión/terapia , Métodos de Anclaje en Ortodoncia/instrumentación , Diseño de Aparato Ortodóncico , Soportes Ortodóncicos , Técnicas de Movimiento Dental/instrumentación , Adulto , Diente Premolar/cirugía , Cefalometría/métodos , Femenino , Estudios de Seguimiento , Humanos , Maloclusión/patología , Alambres para Ortodoncia , Hueso Paladar/patología , Planificación de Atención al Paciente , Extracción DentalRESUMEN
This article describes the orthodontic treatment of a 31-year-old Korean female patient with gummy smile and crowding. The patient showed excessive gingival display in both the anterior and posterior areas and a large difference in gingival heights between the anterior and posterior teeth in the maxilla. To correct the gummy smile, we elected to intrude the entire maxillary dentition instead of focusing only on the maxillary anterior teeth. Alignment and leveling were performed, and a midpalatal absolute anchorage system as well as a modified lingual arch was designed to achieve posterosuperior movement of the entire upper dentition. The active treatment period was 18 months. The gummy smile and crowding were corrected, and the results were stable at 21 months post-treatment.
Asunto(s)
Maloclusión Clase II de Angle/terapia , Mordida Abierta/terapia , Métodos de Anclaje en Ortodoncia/métodos , Adolescente , Tornillos Óseos , Femenino , Humanos , Métodos de Anclaje en Ortodoncia/instrumentación , Diseño de Aparato Ortodóncico , Soportes Ortodóncicos , Alambres para Ortodoncia , Paladar Duro/cirugía , Técnicas de Movimiento Dental/instrumentación , Técnicas de Movimiento Dental/métodos , Adulto JovenRESUMEN
Recently, many studies have been reported on distal molar movement using temporary anchorage devices. However, the side effects of distal movement, such as distal tipping, rotation, or extrusion, are still unsolved. This article describes the use of the lever-arm and mini-implant system for controlled distal movement of maxillary molars and two clinical cases in which patients were treated with this system. Mini implants are needed to control the point of force application in the posterior area with no anchorage loss. When the length of the lever arm and the position of the mini implant are adjusted, the desired line of action of the distal force is determined with respect to the center of resistance of maxillary molars. The lever-arm and mini-implant system is useful not only for absolute anchorage, but also for three-dimensional control during distal movement of the upper molars.
Asunto(s)
Maxilar , Diente Molar/patología , Métodos de Anclaje en Ortodoncia/instrumentación , Diseño de Aparato Ortodóncico , Técnicas de Movimiento Dental/instrumentación , Adulto , Fenómenos Biomecánicos , Femenino , Humanos , Masculino , Maloclusión Clase II de Angle/terapia , Mordida Abierta/terapia , Técnica de Expansión Palatina/instrumentación , Estrés Mecánico , Técnicas de Movimiento Dental/métodos , TorqueAsunto(s)
Maloclusión Clase II de Angle/terapia , Técnicas de Movimiento Dental/instrumentación , Técnicas de Movimiento Dental/métodos , Adulto , Cefalometría , Diente Canino , Análisis del Estrés Dental , Femenino , Humanos , Incisivo , Mandíbula/cirugía , Soportes Ortodóncicos , Dimensión VerticalRESUMEN
Anterior torque control during retraction is difficult to achieve with lingual orthodontic treatment. This article describes the use of a lever-arm and mini-implant system as absolute anchorage for controlled retraction of the anterior teeth during lingual orthodontic treatment and evaluates 2 protrusion cases treated with this system. Various clinical situations are discussed and analyzed from a biomechanical standpoint. Mini-implants are needed to control the point of force application in the posterior area and produce en masse retraction with no anchorage loss. When the length of the lever-arm is adjusted to the position of the mini-implant, the desired line of action of the retraction force with respect to the center of resistance of the anterior segment is selected. Controlled retraction of the anterior teeth was achieved with no loss of anchorage. The mini-implant, in conjunction with the lever-arm, is useful not only for absolute anchorage but also for anterior torque control during retraction in lingual orthodontic treatment.