The integration of periodontal phenotype into orthodontic treatment planning represents a critical advancement for managing periodontally compromised patients. This conceptual paper synthesizes insights from periodontal biology, bone remodeling processes, and orthodontic biomechanics to propose a novel clinical decision framework. Key constructs include periodontal phenotype (thin versus thick biotype), alveolar bone support and defect morphology, orthodontic force magnitude and direction, systemic modifiers such as diabetes and smoking, and patient adherence behaviors. The framework guides clinicians in selecting appropriate force levels and treatment timing to minimize risks like bone dehiscence, gingival recession, and root resorption while optimizing outcomes. Drawing on established literature, it emphasizes the interplay between biological responses to mechanical loading and individual patient factors. Formal propositions are developed to hypothesize relationships among these constructs, fostering hypothesis-generating research. This approach aims to enhance interdisciplinary collaboration between orthodontists and periodontists, ultimately improving treatment predictability and periodontal health maintenance in susceptible populations. By prioritizing phenotype-informed decisions, the framework addresses gaps in current protocols and supports personalized orthodontic care.
