Retrusion

The term retrusion offers several meanings, which can be used in different contexts.

1. Retrusion of teeth: This is an orthodontic condition whereby the front teeth show a bi-maxillary retrusion (Crooked front teeth tilted backwards in both dental arches)
2. Retrusion of a tooth, so to say physically moving a tooth, particularly a front tooth. This is actually a treatment procedure.

The same applies to the opposite of retrusion which is protrusion. Both these terms are examples of the unfortunate lack of clarity surrounding German orthodontic terms.