ABSTRACT
Bite-jumping appliance is a rational appliance for patients with severe overjet and retrusive mandible. In the pubertal growth spurt of patient, the appliance has good effect on skeletal or dental Angle class II malocclusions. After functional treatment, the probability of orthodontic treatment and orthopedic surgery in adult can be reduced. However, the most suitable time to use the bite-jumping appliance has been discussed continuously in various studies. According to many studies related, this paper summarized the treatment time of the fixed and the removable bite-jumping appliances, and compared the advantages and disadvantages between them.
Subject(s)
Malocclusion, Angle Class II/therapy , Orthodontics/methods , Adult , Dental Occlusion , Humans , Mandible , Orthodontic Appliance Design , Orthodontic Appliances, FunctionalABSTRACT
OBJECTIVE: This clinical trial was designed to impose a simultaneous placement of large-size stainless steel round wire and small-size NiTi, and to assess its effect on anchorage reinforcement. METHODS: Twin-arch wires were in place for relief of severe crowding. Distalization of canines were well conducted with support of rigid wire, together with a simultaneous repositioning of upper lateral incisors facilitated by resilient wire. The linear distance between APo and the first molar, together with other parameters, was measured for the evaluation of anchorage consolidation. RESULTS: Anchorage molars and anteriors, as well as the integrity of dental arches remained unchanged upon fulfillment of crowding relief, which was justified by statistical analysis. CONCLUSION: Application of Twin-wires leads to a concurrence of efficient crowding relief and sufficient anchorage consolidation.
