Recent Advances in Orthodontic Brackets: From Aesthetics to Smart Technologies

Background

Orthodontic treatment has shifted from conventional bracket systems toward patient-centred solutions. This review (Cureus, 2025) covers recent advances in orthodontic brackets: aesthetic, functional, and smart technologies. Adult demand for shorter treatment, comfort, and aesthetics has driven innovation in bracket design, materials, and digital integration.

Ceramic brackets

Ceramic brackets (monocrystalline, polycrystalline, zirconia) offer a tooth-coloured, aesthetic alternative to metal. Modern ceramics match metal brackets in strength and effectiveness. Customised aesthetic ceramic brackets (CCB) made via 3D printing and lost-wax technology have been shown to match commercial brackets in friction, bond strength, and aesthetics. Additive manufacturing (DLP, material jetting) of zirconia brackets can meet slot tolerances and improve accuracy.

Self-ligating brackets (SLBs)

SLBs use a built-in clip instead of elastic ligatures, reducing friction at the bracket–wire interface and potentially shortening treatment and improving comfort. They are classified as active (spring clip) or passive (sliding mechanism). Advantages include better sliding mechanics, fewer appointments, and preserved periodontal blood supply. Systems such as Damon®, Empower®, In-Ovation®, QuicKlear (ceramic SLB), and various lingual SLBs (STb, ALIAS, Clippy L, 2D) are discussed. Studies compare torque transmission, friction, and clinical outcomes between SLB systems.

Lingual brackets

Lingual brackets provide invisible treatment; designs have evolved for smaller size, comfort, and customisation. Incognito™ offers fully customised bases, slots, and archwires. Insignia uses custom slot positioning. KommonBase™ allows precise direct bonding with expanded bases. Newer systems such as Brava (Brius) and InBrace use AI-derived movement and programmed wires (SmartWires) for multi-axis control. Bond strength and clinical comparisons with labial appliances are reviewed.

Nano-coating

Plaque accumulation and white-spot lesions around brackets remain concerns. Nano-coatings (e.g. silver, zinc, copper oxides, TiO₂, gold–oxoborate) applied by physical vapour deposition provide antibacterial properties without altering bracket mechanics. Silver nanoparticles reduce Streptococcus mutans and biofilm; TiO₂ and nitrogen-doped TiO₂ show antimicrobial effects. Combined coatings (e.g. TiO₂ + MPC) can enhance antimicrobial performance. Biocompatibility and long-term safety need further study.

3D-printed brackets

CAD/CAM and 3D printing allow brackets tailored to individual tooth anatomy, improving fit, comfort, and biomechanics. Materials include high-strength ceramics and metals (e.g. micro-laser sintering). Systems such as LightForce (custom polycrystalline alumina), Insignia, and UBracket (in-office zirconia or hybrid resin) are discussed. Studies report shorter treatment, fewer debonds, and comparable or better ABO scores with custom systems. Colour stability of printed aesthetic brackets in beverages and ageing is also addressed.

Smart brackets

Smart brackets incorporate sensors (piezoresistive, strain gauge) to measure force and moment in real time, enabling precise adjustments and reduced visits. Telemetric ceramic brackets with CMOS chips and semi-spherical sensors have been tested. Integration with the Internet of Dental Things (IoDT) and AI may allow remote monitoring and personalised force adjustment. Challenges include sensor durability, biocompatibility, and cost.

Limitations and future directions

Limitations include higher cost, possible toxicity of nanomaterials, sensor fragility, and lack of long-term data. Future work should focus on biocompatible materials, standardisation of smart-bracket calibration, mechanical reliability of 3D-printed brackets under stress, scalability in practice, environmental impact, and AI supporting rather than replacing clinical judgment.

Conclusion

Advances in nano-coated, smart, and 3D-printed brackets offer orthodontists more options for customised, efficient, and aesthetic care. This review serves as a resource for selecting bracket systems and understanding emerging technologies and their limitations.

Reference: Koaban AM et al. Cureus. 2025;17(6):e85385. PMC12228049. https://pmc.ncbi.nlm.nih.gov/articles/PMC12228049/