Zirconia restoration ceramic is a popular choice for dental crowns and bridges due to its durability and aesthetic appeal. However, despite its strength, zirconia restorations can still break under certain circumstances. In this blog post, we will explore the 7 major hidden causes of zirconia restoration ceramic breakage.
1. Inadequate Thickness
One common cause of zirconia restoration ceramic breakage is inadequate thickness. When the restoration is too thin, it lacks the necessary strength to withstand the forces of chewing and biting. This can lead to fractures and breakage over time.
2. Poor Marginal Fit
A poor marginal fit between the zirconia restoration and the prepared tooth can also contribute to breakage. If there are gaps or discrepancies at the margins, the restoration may not be able to distribute forces evenly, increasing the risk of fractures.
3. Incorrect Occlusal Adjustment
Improper occlusal adjustment can put excessive stress on the zirconia restoration, leading to breakage. If the restoration is not aligned properly with the opposing teeth, it can experience uneven forces during chewing, causing it to fail prematurely.
4. Inadequate Cementation
The way the zirconia restoration is cemented in place can also impact its longevity. Inadequate cementation or improper bonding techniques can create weak points that are prone to breakage under normal chewing forces.
5. Bruxism and Parafunctional Habits
Patients who suffer from bruxism (teeth grinding) or engage in parafunctional habits like nail-biting or chewing on hard objects are at a higher risk of zirconia restoration ceramic breakage. The excessive forces exerted during these activities can cause the restoration to crack or fracture.
6. Thermal Cycling
Extreme temperature changes in the mouth, such as consuming hot and cold foods or beverages, can subject the zirconia restoration to thermal cycling. This repeated expansion and contraction can weaken the ceramic material over time, making it more susceptible to breakage.
7. Material Defects
Finally, material defects in the zirconia restoration itself can be a hidden cause of breakage. These defects may not be visible to the naked eye but can compromise the structural integrity of the restoration, leading to unexpected fractures.
By understanding these 7 major hidden causes of zirconia restoration ceramic breakage, dental professionals can take proactive measures to prevent failures and ensure the longevity of their patients' restorations.