Post-orthodontic rotational relapse is most associated with which periodontal structure?

The transseptal gingival fibers are slow to remodel and tend to pull rotated teeth back toward their original position, a major cause of post-orthodontic relapse; fiberotomy can reduce this.Other options: Alveolar crest and apical fibers and cementum are not the principal source of rotational relapse.Key exam takeaway: Rotational orthodontic relapse = transseptal gingival fibers (consider fiberotomy/retention).