摘要

Objectives: To evaluate the mechanisms underlying late complications following hair transplantation in androgenetic alopecia (AGA) and to explore preventive strategies based on follicular viability, scalp microenvironment optimization, and regenerative support. Participants will understand risk factors, long-term graft behavior, and integrative maintenance protocols. Introduction: Hair transplantation remains a definitive surgical option for AGA; however, late complications such as progressive native hair loss, donor depletion, unnatural density contrast, and scalp fibrosis may compromise long-term outcomes. Conventional approaches focus on surgical technique, while limited attention is given to biologic maintenance of the scalp environment. Materials / method: A retrospective clinical review of post-transplant AGA patients presenting with late aesthetic or biologic complications was conducted. Evaluated parameters included native hair progression, scalp quality, inflammatory signs, graft survival, and maintenance regimens. Preventive strategies incorporating medical therapy and regenerative protocols were analyzed. Results: Patients without structured medical or regenerative maintenance demonstrated progressive native hair miniaturization and density imbalance. Early integration of anti-androgen therapy and biologic scalp support was associated with improved long-term stability, reduced inflammatory changes, and enhanced graft integration. Conclusion: Late complications after hair transplantation are often biologic rather than purely surgical in origin. Preventive strategies should combine hormonal modulation with microenvironment optimization and regenerative support. A long-term integrative approach may improve graft sustainability and aesthetic durability in AGA management.