A non-transitory computing device readable medium storing instructions executable by a processor to cause a computing device to perform a method, comprising: identifying a plurality of jaw placements of a virtual model of a jaw (102, 104, 202,204, 1202,1204, 1302,1304, 1402, 1404) of a patient between stages of a treatment plan; identifying at least one of the plurality of jaw placements includes a misaligned jaw, wherein the at least one of the plurality of jaw placements is associated with a range of stages of the treatment plan; providing a virtual model of a dental appliance having a first shell (114, 714, 814, 914, 1014, 1114, 1214, 1314, 1514, 1614) and a second shell (116, 816, 916, 1016, 1116, 1216, 1316, 1516, 1616) at a stage of the range of stages of the treatment plan with the identified misaligned jaw, wherein at least one of the first shell (114, 714, 814, 914, 1014, 1114,1214,1314,1514,1614) and the second shell (116, 816, 916, 1016, 1116,1216,1316,1516,1616) are configured to reposition a number of teeth of a patient; and positioning virtual repositioning jaw elements (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) on the first shell (114, 714, 814, 914,1014,1114,1214,1314,1514,1614) and the second shell (116, 816, 916, 1016, 1116, 1216, 1316, 1516, 1616) of the virtual model of the dental appliance, wherein the repositioning jaw elements (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) extend from a surface of the first shell (114, 714, 814, 914, 1014, 1114, 1214, 1314, 1514,1614) and the second shell (116, 816, 916, 1016, 1116, 1216, 1316, 1516,1616) of the virtual model of the dental appliance and the repositioning jaw elements (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) are configured to move a position of the misaligned jaw of the patient, characterized in that said repositioning jaw elements; (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) are hollow, and include design features to reduce the increase in flexibility associated therewith. identifying a plurality of jaw placements of a virtual model of a jaw (102, 104, 202,204, 1202,1204, 1302,1304, 1402, 1404) of a patient between stages of a treatment plan; identifying at least one of the plurality of jaw placements includes a misaligned jaw, wherein the at least one of the plurality of jaw placements is associated with a range of stages of the treatment plan; providing a virtual model of a dental appliance having a first shell (114, 714, 814, 914, 1014, 1114, 1214, 1314, 1514, 1614) and a second shell (116, 816, 916, 1016, 1116, 1216, 1316, 1516, 1616) at a stage of the range of stages of the treatment plan with the identified misaligned jaw, wherein at least one of the first shell (114, 714, 814, 914, 1014, 1114,1214,1314,1514,1614) and the second shell (116, 816, 916, 1016, 1116,1216,1316,1516,1616) are configured to reposition a number of teeth of a patient; and positioning virtual repositioning jaw elements (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) on the first shell (114, 714, 814, 914,1014,1114,1214,1314,1514,1614) and the second shell (116, 816, 916, 1016, 1116, 1216, 1316, 1516, 1616) of the virtual model of the dental appliance, wherein the repositioning jaw elements (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) extend from a surface of the first shell (114, 714, 814, 914, 1014, 1114, 1214, 1314, 1514,1614) and the second shell (116, 816, 916, 1016, 1116, 1216, 1316, 1516,1616) of the virtual model of the dental appliance and the repositioning jaw elements (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) are configured to move a position of the misaligned jaw of the patient, characterized in that said repositioning jaw elements; (106, 108, 110, 112, 206, 208, 210, 212, 406, 408, 706, 708, 806, 808, 810, 812, 1206, 1208, 1210, 1212, 1406, 1408, 1410, 1412, 1506, 1508, 1606, 1608) are hollow, and include design features to reduce the increase in flexibility associated therewith.