A Case Of Fixed Straight Wire Appliance Orthodontic Treatment

Evaluating the mechanical efficiency and safety of a boot-shaped curvature designed for vertical and closed proximo-centrally inclined premolar archwire curvature to control the overall movement of the molar Patient Zhang, 13 years old, complained of “anterior anticuspension” and was diagnosed with mild bony Class III crowding. A fixed straight arch orthodontic appliance was used and a compensatory treatment plan was designed to improve the posterior inclination and occlusal plane by guiding the curve; the molar relationship was adjusted with the help of Class III retraction; CBCT data were recorded before and after treatment and hard tissue changes were analyzed. Dental indicators: Measurement of the axial inclination of the upper anterior teeth, the reduction of the alveolar bone height of the posterior teeth and the inclination angle of the molars; Skeletal indicators: changes in the anterior inclination angle of the mandibular angle (FMA) and changes in the position of the chin; Data statistics: paired t-test was used to analyze the significance of changes before and after orthodontic treatment (P<0.05). Biomechanical advantages of the boot-shaped aligner curvature: distal and mesial buccal movement of the molar crowns as well as controllable adjustment of the root spacing are achieved by the sustained action of a light force To provide an evidence-based basis for the mechanical design and efficacy assessment of proximal-central tilting of molar teeth in clinical practice.