Ferrule: A Review

The ferrule effect plays a pivotal role in enhancing the structural integrity and long-term success of restorations for endodontically treated teeth. By encircling the coronal tooth structure, the ferrule distributes functional forces evenly, improving fracture resistance and longevity. Ideally, a ferrule height of 1.5 to 2 mm is recommended, and its design can significantly impact the tooth’s ability to withstand lateral forces. Studies emphasize the importance of achieving a smooth finish line to minimize micro-leakage and restoration failure. While the benefits of the ferrule are well- established, other factors, such as the tooth's location and the restoration type, may also influence outcomes. This article reviews the different types of ferrules, ideal design considerations, and the impact on clinical success.