Impact of Simulated Aging on Lithium Disilicate Laminate Veneers

Modern esthetic dentistry relies heavily on high-strength ceramics like lithium disilicate for long-lasting restorations. Specifically, lithium disilicate laminate veneers offer a balance between conservative tooth preparation and superior mechanical properties. Moreover, a recent study compared conventional lithium disilicate (LDS) with advanced lithium disilicate (ALD) to determine how simulated aging affects their clinical performance. In this study, the researchers focused on two critical parameters: color stability and fracture resistance.

Optimizing Lithium Disilicate Laminate Veneers for Durability

First, the study utilized forty epoxy resin dies to simulate clinical conditions for maxillary central incisors. In addition, the researchers divided these specimens based on preparation designs, such as butt joint (BJ) and incisal overlap (IO). Furthermore, the team tested two CAD-CAM materials: IPS e.max CAD (LDS) and Cerec Tessera (ALD). Following this, after cementation, the samples underwent 10,000 thermal cycles to mimic oral aging. Consequently, the results provided valuable insights into the longevity of these restorations.

Regarding the findings, the color change results were promising for clinicians. Specifically, statistical analysis revealed that neither the choice of material nor the preparation design significantly altered the color stability. Therefore, patients can expect consistent esthetics over time. In contrast, the outcomes for fracture resistance told a different story. Because of this, both material type and preparation design significantly influenced the force required to break the restorations. Additionally, simulated aging notably decreased the fracture resistance across all groups.

Finally, these results suggest that while color remains stable, the mechanical integrity of lithium disilicate laminate veneers may degrade over time. For this reason, dentists must carefully select preparation designs to enhance mechanical support. Similarly, choosing high-performance CAD-CAM materials provides a strong foundation. However, clinicians should remain mindful of the long-term impact of the oral environment. As a result, proper design remains essential for long-term clinical success.

Frequently Asked Questions

How does thermal aging affect lithium disilicate veneers?

Thermal aging significantly reduces the fracture resistance of lithium disilicate veneers over time. However, it does not appear to have a significant impact on the color stability of the ceramic material.

Which preparation design is best for veneer fracture resistance?

Preparation design significantly influences fracture resistance. While both butt joint and incisal overlap are common, clinicians should choose designs that provide maximum mechanical support for the ceramic material during functional loading.

Disclaimer: This content is for informational and educational purposes only. It does not constitute medical advice or a professional recommendation. The information provided should not be used for diagnosing or treating a health problem or disease. Refer to the latest local and national guidelines for clinical practice.

References

Rizk A et al. Effect of simulated aging on the color stability and fracture resistance of lithium disilicate laminate veneers with different preparation designs. BMC Oral Health. 2026 Mar 04. doi: 10.1186/s12903-026-07883-w. PMID: 41782117.

Jurado CA et al. Fracture resistance of chairside cad/cam advanced lithium disilicate maxillary canine veneers with different incisal edge designs. The Saudi Dental Journal. 2025;37(27):1-9.

Marchesi G et al. Influence of Different CAD/CAM Glass-Ceramics on the Color Stability of Laminate Veneers. Journal of Esthetic and Restorative Dentistry. 2021.