Which material is commonly used for core buildups in dentistry?

Composite resin is commonly used for core buildups in dentistry because it provides excellent aesthetics, adheres strongly to tooth structure, and can be easily shaped to restore the natural contour of the tooth. This material can be cured with light, offering enhanced strength and durability for the restoration.

Amalgam, while it can be used in some core buildup situations due to its strength and longevity in posterior teeth, is less favored for aesthetic reasons and may not bond as effectively to the tooth structure compared to composite resin. Glass ionomer is known for its ability to release fluoride and bond chemically to tooth structure, but it may not provide the same level of strength as composite resin for core buildups. Resin ionomer combines some properties of both glass ionomer and composite resin, but generally offers less strength and wear resistance than composite resin, making it less common as a choice for core buildups. Thus, composite resin stands out as the preferred material due to its balance of strength, aesthetics, and ease of use.