Contemporary Ortho Appliances Practice Test

Attachments in aligner therapy are small composite bumps bonded to the enamel to give the aligner something to grip and to transfer forces more precisely. By adding these intentional shapes, the aligner can engage the tooth more securely and apply forces in specific directions, which is essential for achieving movements that are difficult with the aligner alone. This enables control of torque and rotation around the tooth’s long axis, as well as vertical movements such as intrusion or extrusion, when the treatment plan calls for them. The reason this is the best answer is that composite attachments are the standard method used to enhance aligner control and force transmission in the required directions. Other approaches like metal bonding, rubber bands solely attached to the aligner, or ceramic pins aren’t used in the same way to achieve these movements in aligner therapy.