Preeruptive tooth movement is defined as?

• A. Movement of deciduous and permanent tooth germs within tissue of jaws BEFORE eruption
• B. Movement after eruption to occlusion
• C. Movement of roots during eruption
• D. Orthodontic movement only

Answer: (C)

Preeruptive movement describes the positional changes of developing tooth structures within the jaw before any part of the tooth has emerged into the mouth. This includes both deciduous and permanent tooth germs shifting in the developing jaw as the jaws grow and space is reorganized, all while the teeth remain encased in bone. The important distinction is that this movement happens prior to eruption, not after the tooth has erupted. Movement of roots during eruption is part of the eruption process itself, as the tooth moves toward occlusion and root formation continues. So the concept best captured here is the movement of tooth germs within jaw tissue before eruption.