Violation
When a simple tipping force is applied to the crown of a single-rooted tooth, the centre of rotation is located
at the cervical line
within the apical half of the root
at the apex
within the cervical one third of the root.
When a simple tipping force is applied to the crown of a single-rooted tooth, the centre of rotation is located
at the cervical line
within the apical half of the root
at the apex
within the cervical one third of the root.