Dental restorations have come a long way since the beginning of modern dentistry. You now have many choices when it comes to repairing or replacing teeth with fillings, crowns, and bridges.
Fillings
Different dentists have differing opinions regarding the safe use of mercury. However, as more information is released about the true effects of this metal on the nervous system, an increasing number of health-conscious dentists eliminating amalgam from their practices and opting for a composite filling. Amalgam fillings should be avoided due to their mercury content and tendency to crack over time, allowing decay back into the tooth and increasing the release of mercury.
Metals used in the fabrication of crowns and bridges do not contain mercury.
Crowns and Bridges
Smiles repaired with ceramic restorations look more natural and have a clear aesthetic advantage over metal, but concerns over the oral and overall health of patients relative to the materials used in crowns and bridges also warrant a review of your options.
The current choices for crowns and bridges are:
Metal Crowns
Metal crowns can be made from stainless steel (usually for primary teeth) or metal alloys such as chromium, nickel, and iron and are typically used as the body of porcelain fused to metal (PFM) restorations. PFM is a metal crown that is covered with a thin layer of porcelain (ceramic) and has a similar appearance to all-ceramic crowns. PFM crowns and all-ceramic crowns have comparable lifespans; however, PFM restorations are subject to chipping and incomplete porcelain coverage, reducing its aesthetic.
The metals used in PFM crowns can trigger reactions in those with metal allergies. However, the full health implications are still being studied. Early reports show that metal restorations in allergic individuals cause gum irritation and can lead to periodontal disease.
For TMJ pain patients, accompanying teeth-grinding on metal restorations cause more harm than with the all-ceramic alternative.
Porcelain Crowns
All-ceramic (porcelain) crowns and bridges are long-lasting and provide a more natural coloring for the tooth. They can be made from traditional porcelain or zirconia.
All-ceramic crowns are resistant to chipping. While some have argued that metal-based crowns are stronger and better-suited for molars and premolars, zirconia provides the strength required for these restorations.
The fine materials used in all-ceramic restorations produce a lighter, more aesthetically pleasing result and are biocompatible. This means natural gum tissue can remain healthy alongside the crown or grow back in the case of early periodontal disease. There is also no risk of an allergic reaction with all-ceramic crowns and bridges.
While PFM crowns are comparable to ceramic crowns in color and lifespan, all-ceramic crowns are more beneficial in terms of aesthetic appearance and for those suffering from metal allergies, TMJ, or excessive grinding. All-ceramic crowns are clearly a healthier and more beautiful choice for your smile.