What type of polishing agents should be avoided for patients with porcelain restorations?

Abrasive pastes should be avoided for patients with porcelain restorations because these pastes contain larger particles that can scratch and damage the surface of the porcelain. Porcelain restorations, while durable, have a smooth and delicate surface that can be easily compromised by excessive abrasion. Using an abrasive agent can lead to loss of shine, increased staining, and even structural damage to the restoration over time.

In contrast, fluoride pastes are specifically designed to help protect and strengthen teeth, non-abrasive pastes are gentle and safe for all types of restorations, and whitening agents are formulated for cosmetic enhancement without being overly abrasive. Each of these options serves a purpose but does not pose the same risk of damage to porcelain surfaces as abrasive pastes do.