The periodontal ligament as a driver of dentoalveolar regeneration
The periodontal ligament plays a central role in maintening and repairing the dentoalveolar complex. Unlike osseointegration around implants, the periodontal ligament functions as a dynamic, bone-remodelling system in which osteoclastic and osteoblastic processes are continuously coordinated. This enables it to actively maintain and regenerate bone, the periodontal space and soft tissues. Autotransplantation offers a unique clinical situation in which this biological potential is directly harnessed by transferring a vital periodontal ligament to a new location. In a donor tooth with an open apex and vital pulp, or with an endodontically treated, closed apex, the preservation of the periodontal ligament’s vitality leads to predictable regeneration of alveolar bone, restoration of a physiological periodontal space and stable gingival contours, regardless of apical configuration and/or pulp vitality. This makes autotransplantation a clinically relevant option for tooth replacement, particularly in situations where long-term preservation of bone and soft tissue is essential.