A series of appliances including a first shell and a second shell can be designed to incrementally implement a treatment plan. The first and second shells can have cavities designed to receive teeth of a jaw. A first bite adjustment structures can be formed of a same material as the first shell, extending from the first shell and designed to interface with teeth of a second jaw. A second bite adjustment structures can be formed of a same material as the second shell, extending from the second shell and designed to interface with teeth of the second jaw. The first and the second bite adjustment structures can have respective shapes and locations specific to respective stages of the treatment plan.