The design of custom orthodontic mechanics

The straightwire appliance promises prescribed tooth positions within the arches. Unfortunately, such an outcome is not necessarily achieved, especially in the adult patient. Teeth do not always move according to a template. Continuous archwires do not allow for differentiation between active and reactive units; consequently, the correct force system is never developed. These shortcomings could be overcome by custom-designed mechanics. Here we report on the use of Dental Movement Analysis (DMA) software supported by two clinical examples. On the computerized occlusogram, DMA stimulates the desired tooth movements and computes the force vectors and moments necessary to achieve the planned result. These images enable the clinician to fabricate a custom appliance for maximum efficiency. Maximum efficiency results in minimal treatment time.