Removable dental appliance including positioning member

A system comprising:

• an ordered set of removable dental appliances configured to reposition one or more teeth of a patient, each removable dental appliance in the set of removable dental appliances comprising:
• an appliance body configured to at least partially surround a plurality of teeth of a dental arch of a patient, the appliance body comprising:
• a unitary material defining a shell shaped to receive at least one tooth of the patient;
• a spring member integrally formed with the shell, the spring member comprising a recess in the shell and a region of the shell adjacent the recess;
• and
• a deformable occlusal bulge integrally formed with the shell, the bulge creating a cavity between the shell and occlusal surfaces of the teeth when the appliance is seated on the dental arch, the bulge having an original shape spanning over the occlusal surfaces of at least two teeth of the dental arch and defining a change in a contour of the shell such that the shell does not follow the contour of the occlusal surfaces of the teeth in the cavity,
• wherein the recess is configured to receive an attachment affixed to the at least one tooth, wherein the spring member is configured to apply a spring force to the attachment to cause movement of the at least one tooth toward a desired position when the removable dental appliance is worn by the patient, wherein the bulge is configured to receive a positioning force to deform the appliance body to facilitate engagement of the spring member with the attachment, wherein the reception of the positioning force deforms the occlusal bulge into the cavity in a direction towards the occlusal surfaces, and wherein when the at least one tooth reaches the desired position, the deformable occlusal bulge is configured to return to its original shape.

A removable dental appliance comprising:

• an appliance body configured to at least partially surround a plurality of teeth of a dental arch of a patient, the appliance body comprising:
• a unitary material defining a shell shaped to receive at least one tooth of the patient;
• a spring member integrally formed with the shell, the spring member comprising a recess in the shell and a region of the shell adjacent the recess;
• and
• a deformable occlusal bulge integrally formed with the shell, the bulge creating a cavity between the shell and occlusal surfaces of the teeth when the appliance is seated on the dental arch, the bulge having an original shape spanning over the occlusal surfaces of at least two teeth of the dental arch and defining a change in a contour of the shell such that the shell does not follow the contour of the occlusal surfaces of the teeth in the cavity,
• wherein the recess is configured to receive an attachment affixed to the at least one tooth, wherein the spring member is configured to apply a spring force to the attachment to cause movement of the at least one tooth toward a desired position when the removable dental appliance is worn by the patient, and wherein the bulge is configured to facilitate engagement of the spring member with the attachment in response to a positioning force being applied to the positioning member, wherein the recess comprises a first dimension extending substantially perpendicular to a direction of the spring force and a second dimension extending substantially parallel to the direction of the spring force, and wherein the first dimension is greater than the second dimension, and wherein first dimension is positioned parallel to an occlusal plane of the teeth, wherein the reception of the positioning force deforms the occlusal bulge into the cavity in a direction towards the occlusal surfaces, and wherein when the at least one tooth reaches the desired position, the deformable occlusal bulge is configured to return to its original shape.