Side Effects of Porcelain-Fused-to-Metal (PFM) Crowns

Today, people are placing increasing emphasis on oral health. When tooth damage is severe, many opt for porcelain-fused-to-metal (PFM) crowns—a restorative treatment known for its excellent aesthetic and functional outcomes. However, PFM crowns are not without potential side effects. So, what are the possible side effects of PFM crowns?

Side Effects of Porcelain-Fused-to-Metal (PFM) Crowns

1. Tooth decay: If the PFM crown is inadequately fabricated or placed by an inexperienced clinician, the marginal fit between the crown and the natural tooth may be compromised. Bacteria can accumulate in the gap between the original tooth and the crown, potentially leading to decay of the underlying natural tooth structure. To safeguard dental health, patients are advised to seek treatment at reputable, licensed dental facilities.
2. Chipping or fracture of the porcelain layer: Porcelain has a different hardness compared with natural enamel. Biting into hard foods or experiencing trauma to the tooth may cause chipping or fracture of the porcelain surface, compromising aesthetics and requiring prompt replacement of the crown.

Many patients experience gingival or tooth sensitivity—particularly to hot or cold foods—after receiving PFM crowns. This is often due to excessive stimulation of the dental pulp during tooth preparation (e.g., over-aggressive grinding), or pre-existing oral conditions such as gum disease or untreated caries. Any underlying oral disease should be thoroughly treated before crown placement; additionally, selecting a biocompatible, less abrasive ceramic material may help minimize irritation.

In daily care, patients should prioritize meticulous oral hygiene: brushing thoroughly after meals and supplementing with dental floss or interdental cleaners. Regular dental check-ups—at least every six months—are also strongly recommended. We hope this information proves helpful!