A removable orthodontic assembly to be used in a user's mouth, including: a frame member configured to be removably positioned proximate a lingual portion of the user's teeth; a first connector member, wherein the first connector member comprises a first end extending proximate to a labial portion of the user's teeth and a second end engaging the frame member; and a labial bow configured to be removably positioned proximate to the labial portion of the user's teeth having a first end and a second end, wherein the labial bow is configured to removably engage the first connector member.

Methods for determining appliance geometry are provided. In some embodiments, a method includes determining a geometry for an attachment placement appliance. The attachment placement appliance can include an appliance body including a support formed in a tooth-receiving cavity for a tooth of a patient, one or more coupling structures connected to the support, and an aligner attachment connected to the one or more coupling structures. The aligner attachment can be configured to be mounted on the tooth and shaped to engage with an attachment well of a shell aligner and exert forces on the tooth when the aligner attachment is coupled to the attachment well. The appliance body can be configured to align an aligner attachment to a predetermined location on the tooth. The method can further include generating instructions for direct fabrication of the attachment placement appliance via an additive manufacturing process, based on the determined geometry.

A system for generating occlusal loading is provided, including a loading appliance and a controller. The loading appliance includes three load transmission elements and three actuators. The load transmission elements are adapted to be positioned between upper and lower anterior teeth of the patient and between upper and lower posterior teeth on the left and right sides of the patient's mouth, respectively. The load transmission elements are separated from each other. The actuators are coupled to the load transmission elements, respectively. The controller is configured to control the three actuators to actuate the three load transmission elements individually and sequentially, with a rest period between successive actions of the three load transmission elements, to transmit vibration energy from the three actuators to the patient's periodontal tissues of the anterior teeth, the left posterior teeth, and the right posterior teeth.

A dental vibration device is provided. The dental vibration device includes a controller, a mouthpiece, and a plurality of transmission elements. The transmission elements include a central transmission element, a left transmission element, and a right transmission element. The controller is housed in a casing. Each transmission element is coupled to a vibration motor. Each transmission element extends from the casing and is inserted into the mouthpiece. The mouthpiece is composed of an anterior teeth part, a left posterior teeth part, and a right posterior teeth part spaced apart from each other.