| The premature loss of primary molars frequently leads to shortened dental arch length, action of subcutaneous permanent teeth, and dental crowding. Effective space management constitutes a core component of preventive orthodontics. Traditional space maintainers have limitations such as cumbersome fabrication, insufficient precision, and susceptibility to periodontal issues. Recently, digital technologies centering on CAD/CAM and 3D printing have revolutionized this field. Based on clinical demands, this article systematically reviews the application of digital 3D printing in space management. It discusses in detail the acquisition of digital models, personalized topology optimization, Selective Laser Melting (SLM) techniques, and material characteristics. The clinical advantages of 3D-printed maintainers—including precise adaptation, enhanced bio mechanical performance, and improved patient comfort—are comprehensively summarized. Finally, the article analyzes current challenges such as cost and technical barriers, and looks forward to future trends involving AI-assisted design, novel bioactive materials, and multifunctional integration, providing a theoretical basis for precise and personalized space management. |
