What is a notable disadvantage of cast gold inlays?

The notable disadvantage of cast gold inlays being less conservative than amalgam relates to the amount of tooth structure that needs to be removed to accommodate the restoration. Cast gold inlays require more tooth preparation than amalgam restorations due to their material properties and the need for precise fitting. This can lead to increased removal of healthy tooth structure, which is usually undesirable in restorative dentistry.

While cast gold offers excellent mechanical properties and does not cause discoloration of the tooth due to corrosion, its requirement for more extensive preparation makes it less conservative compared to amalgam. Additionally, when considering longevity and wear resistance, cast gold may have advantages over ceramices, but this does not pertain to its conservation of tooth structure.