PDF: Microbial Adhesion on 3D-Printed Clear Aligners: A Systematic Review



Microbial Adhesion on 3D-Printed Composite Polymers Used for Orthodontic Clear Aligners: A Systematic Review and Meta-Analysis of In Vitro Evidence

Clear aligner therapy has fundamentally transformed the landscape of modern orthodontics, offering patients a highly aesthetic, comfortable, and removable alternative to traditional fixed appliances.

As the industry rapidly transitions from conventional thermoformed plastics toward cutting-edge, direct 3D-printed composite polymers, evaluating the biological behavior of these novel materials becomes paramount.


Among the most critical clinical considerations is the material-host interface, specifically how these synthetic surfaces interact with the oral microbiome and influence microbial adhesion.

The retention of biofilms on aligner surfaces poses significant clinical risks, ranging from white spot lesions and enamel demineralization to periodontal inflammation and compromised material optical clarity.

This comprehensive systematic review and meta-analysis meticulously evaluates the current in vitro evidence regarding microbial colonization on 3D-printed aligner polymers.


By analyzing how parameters such as surface roughness, printing orientation, hydrophobicity, and chemical composition dictate bacterial and fungal adherence, this study bridges the gap between digital manufacturing innovation and oral health preservation.

Understanding these microbiological dynamics is essential for contemporary clinicians navigating the shift toward direct-printed appliances.

Furthermore, the insights provided in this research offer a foundational framework for material scientists aiming to develop the next generation of biocompatible, plaque-resistant, and antimicrobial orthodontic biomaterials.

📖 Read the Full Study: To explore the comprehensive meta-analysis data, specific microbial strain behaviors, and the clinical implications of 3D-printed biomaterials in orthodontics, you can access and download the complete article in PDF format on MDPI here.

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