Asymmetrical tooth movement is necessary to treat asymmetrical occlusion caused by various factors, such as asymmetry of the jaw, missing or damaged teeth, or unilateral resorption of the temporomandibular condyle. Temporary Skeletal Anchorage Devices (TSADs) can be practically used for anchorage preparation in treating such asymmetry cases. Since the anteroposterior movement of posterior teeth using TADs affects the vertical and horizontal positions of adjacent teeth along the arch wire, it is necessary for clinicians to recognize and control the asymmetrical effect on the arch during asymmetrical tooth movement. In this presentation, TSADs and novel appliances are used to control tooth movement in vertical and horizontal dimensions during asymmetrical tooth movement in sagittal dimension. Pushing force mechanism specifically designed with TSADs is effective in preventing side effects from asymmetrical tooth movement. Asymmetrical occlusion cases treated either with or without extraction are presented to show effective treatment outcomes after applying the new type of force mechanics utilizing TSADs.
Learning Objectives:
After this lecture, attendees will be able to:
Approach asymmetry correction using TSADs in non-extraction and extraction cases.
Understand the principle and the mechanism of the novel treatment appliance to attain asymmetrical tooth movement with stability.
Consider the biomechanical effects in vertical and transverse dimension when using TSADs for an asymmetrical tooth movement in sagittal dimension.
