Gold is the most traditional filling material and, except for its colour, is the substance most similar to that of natural teeth. Gold inlays are useful for restoring defects in molar and premolar teeth and are attached with dental cement.
As far as security, durability, fit and biocompability are concerned, gold inlays used to fulfill the job to the highest possible standards.

Advantages:

• High durability
• High precision
• High biocompability 

Disadvantages:

• Expense
• Aesthetic incompatibility