ABSTRACT

Background: The longevity of all-ceramic crowns and fixed dental prostheses is critical for successful
dental restorations. Occlusal loading, a significant factor influencing the lifespan of these restorations, has
been the subject of numerous studies, yet its precise impact remains inadequately understood.

Aim:
This study aimed to analyze the effect of occlusal loading on the longevity of all-ceramic crowns and fixed dental
prostheses, with a focus on identifying optimal loading conditions that enhance their durability.

Methods:
A retrospective analysis was conducted on patients who received all-ceramic crowns and fixed dental
prostheses over five years. Data were collected on occlusal loading conditions, restoration longevity, and
failure modes. Statistical analyses were performed to assess the relationship between occlusal loading and
the longevity of the restorations.

Results:
The findings indicated that higher occlusal loading significantly reduced the longevity of
allceramic crowns and fixed dental prostheses. Specifically, restorations subjected to excessive loading
exhibited a higher incidence of fracture and delamination compared to those under normal loading
conditions. The study reported a mean longevity of 7.2 years for crowns with optimal loading versus 4.3
years for those under excessive loading.

Conclusion: The study concluded that managing occlusal loading is essential for enhancing the longevity
of all-ceramic crowns and fixed dental prostheses. Clinicians should consider occlusal adjustments and
monitoring to prevent excessive loading, thereby improving patient outcomes.

Keywords: All-ceramic crowns, fixed dental prostheses, occlusal loading, longevity, dental restorations.