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Dental fillings and crowns are used to restore teeth to ideal function and appearance. Patients frequently ask how long these restorations will last. All dental fillings and crowns will eventually fail if you live long enough. Nothing in the mouth lasts forever We all have a lifelong need for dental care.
The longevity of fillings varies compared to crowns. Research has found that fillings generally last between 5 to 10 years, while crowns often last 10 to 20 years or longer. These are only averages. The lifetime of each restoration is affected by several factors.
One of the primary factors affecting the longevity of fillings and crowns is the material used. Fillings can be made from materials like amalgam (silver filling), composite resin, gold, or porcelain. Each type of material has its advantages and drawbacks.
Amalgam fillings tend to be more durable and economical. They generally lasl around 10-15 years, These restorations are dark in color and have a tendency to discolor teeth over the years as well as cause cracks in teeth.
Composite fillings generally last about 5-10 years. Composite resin is popular due to its tooth-like appearance and ability to bond to tooth structure. The wear resistance of these restorations has improved over the years but is not as good as other restorative materials.
Gold and porcelain crowns are more durable than fillings. They often last over 20 years. All-ceramic crowns, though more natural-looking, may not last as long as gold crowns. Eventually the stress of biting and chewing causes ceramic crowns to fracture. Gold crowns have the best longevity, but the cost and appearance detract from their use today. Crowns involve more of an investment but generally are less costly in the long term than fillings.
The size of the restoration and amount of tooth structure remaining also affect the longevity of the restorations. Smaller fillings generally last longer than large fillings. Crowns which are placed on teeth with significant remaining tooth structure last longer.
Good oral hygiene is crucial for the longevity of dental restorations. Cavities can develop around and under fillings and crowns. Proper brushing and flossing reduce plaque and bacteria which contribute to decay around the edges of dental restorations, Regular dental check-ups also help detect early signs of wear or damage, allowing for timely intervention to prolong the restoration’s life.
Diet also affects the lifetime of filling and crowns. Patients who have a diet high in sweets tend to have more decay which results in the premature failure of restorations. Acidic foods and beverages weaken the bond between fillings or crowns and the tooth. Dry mouth from medications and aging also increases the changes of decay around and under fillings and crowns.
Individuals with a strong bite or who grind their teeth (a condition known as bruxism) experience more wear and tear on fillings and crowns. Bruxism exerts additional pressure on teeth, accelerating the wear on restorations, especially in molars where chewing forces are highest. Nightguards are recommended to protect restorations and extend their lifespan.
Habits affect the lifespan of fillings and crowns. Patients who tend to chew ice and nuts wear out restorations quicker. Patients who use their teeth to open packages or hold items will experience premature failure due to fracture. Your teeth are not meant to be tools.
The location of the restoration also affects the longevity. Fillings in the back teeth endure more force from chewing, which can lead to faster wear and fracture. Front teeth, are subjected to less chewing force, but are more vulnerable to chipping of composite resin bondings.
Dental fillings and crowns are essential treatments to help us smile and chew food. They have a lifetime affected by oral hygiene, material, size, location, diet, and habits. Regular dental check-ups are necessary to determine when to replace restorations to prevent pain and maintain your smile. We all have a lifelong need for dental care
