What type of cement is best to enhance the retention of crowns?

Resin cement is specifically designed for permanent cementation of crowns and bonds effectively to both tooth structure and the crown material. Its unique composition allows for strong adhesion, enhancing the retention of crowns significantly. Resin cements often have a dual-cure system that strengthens as they set, providing excellent mechanical properties and resistance to dislodgement.

In contrast, glass ionomer cement provides some benefits, such as fluoride release and good adhesion to tooth structure, but its bond strength is generally lower than that of resin cements. Temporary cement is formulated for short-term use, allowing for easy removal of crowns, which would not be appropriate for long-term retention. Composite resin is primarily used for restorations rather than cementation of crowns, and while it can provide good aesthetics and bonding, it is not as specialized for crown retention as resin cement is.

Overall, the optimal choice for securing crowns in a long-lasting manner is resin cement due to its superior bonding capabilities and durability.