Dental appliances with repositioning jaw elements

A removable dental appliance system, comprising:

• a first shell having tooth apertures configured to receive teeth of a patient's upper dentition;
• a second shell having tooth apertures configured to receive teeth of the patient's lower dentition;
• a first repositioning jaw element that extends from a buccal or lingual surface of the first shell and includes a first surface;
• a second repositioning jaw element that extends from a buccal or lingual surface of the second shell and includes a second surface to interface with the first surface of the first repositioning jaw element;
• wherein the first repositioning jaw element and the second repositioning jaw element are positioned to interface as the patient moves to a fully engaged sagittal jaw position of the patient's upper dentition and the patient's lower dentition in a manner to reposition the patient's jaw and wherein the first repositioning jaw element and the second repositioning jaw element crisscross when interfacing;
• and
• wherein the at least one of the first and second repositioning jaw elements has a first outer surface oriented to face the tongue of the patient surface and a second outer surface oriented to face the cheek of the patient and includes a reinforcement member formed along at least one of the first and second outer surfaces to provide reinforcement of the element.

A removable dental appliance formation system, comprising:

• a non-transitory computing device readable medium storing instructions executable by a processor to cause a computing device to perform a method, the method including:
• identifying a misaligned jaw of a patient from a virtual image of the patient's jaw;
• and
• providing a treatment plan for the patient including a virtual model of a dental appliance having a first shell and a second shell configured to reposition at least one tooth of the patient, the virtual model of the dental appliance including repositioning jaw elements on the first shell and the second shell configured to move a position of the misaligned jaw of the patient and wherein the at least one of the first and second repositioning jaw elements has a first outer surface oriented to face the tongue of the patient surface and a second outer surface oriented to face the cheek of the patient and includes a reinforcement member formed along at least one of the first and second outer surfaces to provide reinforcement of the element.