[Dynamic reversibility of tooth mobility and its key prognostic factors in periodontitis: a retrospective study].

Tooth mobility exhibits significant dynamic reversibility following standardized periodontal treatment. Grade Ⅲ mobility should not be considered an absolute indication for extraction. Particularly in cases where the residual alveolar bone covers more than one-quarter of the root length, it is recommended to consider periodontal splinting and maintain a follow-up period of at least one year, so as to formulate more precise strategies for retaining mobile teeth and preserve natural teeth to the greatest extent possible.