Orthodontic treatments apply mechanical forces to teeth, facilitating movement through alveolar bone remodeling, but these forces can inadvertently contribute to periodontal tissue breakdown if not carefully managed. This conceptual manuscript proposes a novel integrative mechanistic framework that elucidates bidirectional feedback loops connecting orthodontic mechanical forces with periodontal responses. Key constructs include orthodontic forces inducing periodontal ligament (PDL) stress, which triggers inflammatory mediators such as cytokines (e.g., IL-1β, IL-6, TNF-α) and prostaglandins (e.g., PGE2), leading to alveolar bone resorption and tissue degradation. These processes are amplified through feedback pathways where initial inflammation enhances mediator release, while bone remodeling signals back to modulate PDL cellular activity. Drawing from tissue biomechanics, cellular signaling, and inflammatory mechanisms, the framework highlights how excessive force magnitude or duration disrupts homeostasis, promoting pathological breakdown. It synthesizes evidence from recent literature on mechanotransduction and cytokine networks to propose a cyclical model of force-inflammation-remodeling interactions. This theoretical approach offers insights for optimizing orthodontic interventions to minimize periodontal risks, emphasizing the need for force calibration and anti-inflammatory adjuncts. By framing periodontal responses as dynamic feedback systems, the model advances conceptual understanding in periodontology and orthodontics, paving the way for future empirical validation.
