e.max restorations consist of lithium disilicate, a glass-ceramic that has been shown to exhibit strength three times greater than that of other glass-ceramics. Meanwhile, these restorations can be made to look incredibly lifelike, giving patients an option that not only looks beautiful, but can also withstand the pressures of biting and chewing.
However, zirconia exhibits more than double the durability of e.max. The amount of physical pressure and stress that these materials can withstand is measured in megapascals (MPa). According to a provider of continuing education to dental health professionals, e.max is able to withstand about 360 MPa. Zirconia, on the other hand, has the capacity to withstand about 900 MPa.
On average, an adult male has a bite force of about 175 pounds, which is equal to roughly 1.2 MPa. At a glance, this may make both e.max and Zirconia look like they offer far more durability than anyone could possibly need, but it is very important to remember that a denture must stand up to far more than a strong bite. If you lead an active lifestyle playing contact sports, or if you work in a profession such as law enforcement, emergency response, or the military, you likely face a risk of facial trauma on a daily basis. The exceptional strength of Zirconia can help ensure that you not only experience minimal wear due to normal daily functions, but also have added reinforcement in the event of an unexpected impact.
While it is true that a denture made of Zirconia costs more than a denture made from e.max, the difference is negligible. Meanwhile, Zirconia provides more than double the capability to withstand bite pressure and trauma. If you value both exceptional aesthetics and durability, you stand to experience the most satisfying and long-lasting benefits by choosing a denture made of Zirconia.