Removable dental appliance

A removable dental appliance, comprising:

• a dental aligner configured to cooperate with at least one tooth of a patient's dental arch so as to move the at least one tooth to a desired position,
• connectors configured to be attached to teeth of the dental arch and on which the dental aligner detachably engages, and
• the connectors and the aligner cooperate so as to apply at least one treatment stress on at least the at least one tooth when the dental appliance is worn by the patient,
• wherein,
• the dental aligner is formed from a flexible strip profiled to cover only the lingual surface of the teeth while leaving the other surfaces of said teeth free,
• the connectors are configured to be attached to the lingual surface of the teeth,
• pockets into which the connectors fit elastically are shaped in the flexible strip in such a way that said pockets and said strip have no relative movement between them,
• when the pockets are fitted into the connectors and the flexible strip is in position, the flexibility of said strip enables said strip to exert one or more stresses on said connectors, and
• the pockets and the connector are configured so that the force for removing the aligner from said connectors is less than 550 g, such that said connectors fit into said pockets in a manually detachable manner.