98 AUSTRALASIAN DENTIST LABS Zirconia veneers have emerged as a popular option for their strength and aesthetic qualities yet bonding them effectively has long been a challenge due to their particular physical and chemical properties. Unlike materials such as e.max, zirconia’s chemically inert and dense structure lacks porosity. This makes it resistant to standard etching techniques typically used for bonding. Traditional bonding agents also typically fail to chemically interact with zirconia, which complicates the process even further. However, with advanced bonding agents like Biomic LiSi Connect now available, the complexities of bonding zirconia veneers are now being effectively addressed to enable strong, lasting bonds even in complex cases. Benefits of zirconia veneers Zirconia veneers offer several distinct advantages over other materials, such as e.max, particularly in cases where durability and strength are critical. While e.max veneers are celebrated for their aesthetic appeal and bonding capabilities, they may lack the resilience required for patients with high bite forces or grinding habits. Zirconia’s high flexural strength significantly reduces the risk of fractures or chips and is ideal for cases requiring ultra-thin veneers as it can be fabricated thinner than e.max without compromising durability. This allows for a more conservative approach to tooth preparation and allows dentists to preserve more of the natural tooth structure. Zirconia also ensures consistent shade matching and achieves a cohesive, uniform appearance. In high-aesthetic cases such as veneers, zirconia’s translucency has evolved to closely mimic the natural tooth structure, which allows it to achieve the visual appeal once more commonly associated with materials like e.max. In addition to these benefits, zirconia veneers are particularly advantageous in situations where preserving the natural Zirconia Veneers: Expert bonding and preparation tips By Ian Feigen, Technical Services Director, Avant Dental tooth is paramount. Because they require less tooth reduction, the process is less invasive and typically results in a more comfortable experience for the patient. This preservation of tooth structure also helps maintain the overall integrity and health of the teeth, which is an important consideration in long-term restorative planning. The ability to fabricate zirconia veneers in ultra-thin dimensions while maintaining strength and durability offers clinicians a versatile solution for a wide range of patient needs. Zirconia’s durability is evident in high-stress scenarios, such as cases where patients exhibit parafunctional habits like bruxism or clenching. While other materials may succumb to chipping or cracking under such conditions, zirconia’s resilience provides peace of mind for the dentist and the patient. Its resistance to wear ensures that the veneers retain their aesthetic and functional qualities over time, even in demanding cases. zirconia to achieve a clinical bonding effect comparable to these materials. Postsintering, the zirconia surface exhibits increased surface roughness, conducive to improved bonding when combined with acid etching and silanisation. Biomic LiSi Connect’s ultra-thin lithium disilicate coating ensures that the restoration design and clinical placement remain unaffected while producing a strong, durable bond. Its compatibility with all zirconia materials adds versatility to its use across various restorative applications. By integrating this bonding protocol, dentists can achieve reliable and aesthetically pleasing results with zirconia veneers. However, achieving a secure and long-lasting bond for zirconia veneers still requires precise surface preparation. Thoroughly cleaning the zirconia surface with Aluminium Oxide and steam and air jets removes particles and contaminants that could interfere with bonding. Following cleaning, Biomic LiSi Connect is applied as a light, even spray, ensuring consistent coverage without over-saturation, which could compromise the veneer’s fit. The subsequent application of hydrofluoric acid creates a microscopically rough surface that enhances mechanical grip and improves adhesion. Proper cleaning and silanisation further reinforce the bond and creates a chemical bridge between the zirconia and resin cement. Rubber dam isolation ensures a dry, uncontaminated bonding area, which is also critical for achieving optimal results. One of the keys to success in bonding zirconia veneers is understanding the importance of proper handling and technique during each step of the process. For instance, ensuring that the zirconia surface is free from oils or contaminants before applying Biomic LiSi Connect can make a significant difference in the quality of the bond. Dentists should also pay careful attention to the application of hydrofluoric acid and ensure even coverage to create the necessary surface texture. These seemingly Ian Feigen Avoiding challenges in bonding Bonding zirconia veneers has historically presented challenges due to the material’s inherent properties, but Biomic LiSi Connect has revolutionised the process. This specialised bonding pretreatment agent modifies zirconia’s surface properties to enhance adhesion. By applying a layer of Biomic LiSi Connect and subjecting it to a sintering process, a thin lithium disilicate coating forms on the zirconia surface. This coating mimics the surface characteristics of glass ceramics, enabling
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