How Long Do Dental Fillings Last? Factors That Affect Their Lifespan

Dental fillings are used to restore teeth that have decay or damage. This procedure restores a tooth's strength, function, and appearance. Fillings close off the cavity, preventing bacteria from getting into the tooth and causing more damage. During the treatment, the dentist will remove the decayed area of the tooth, clean it, and apply the filling material. The filling material typically matches the tooth and is indistinguishable.

The lifespan of dental fillings

After getting fillings, patients will need to keep up with regular dental appointments to monitor the filling and know when to replace them. That said, dental fillings can last between five to 15 years or more. Several factors affect the durability of the dental filling, including:

The filling’s size and location

How long a tooth filling lasts depends on where and how big it is. Fillings in high-stress areas from chewing wear out more quickly than fillings in low-stress areas. For example, a filling on the molars and premolars will wear down much more quickly, due to the biting force applied to them while eating.

Oral hygiene routine

Good oral hygiene helps prolong the life of the dental fillings. Poor oral health habit is the major reason most people need to get fillings in the first place. After undergoing the restorative procedure, many patients might be a lot more motivated to take their oral health more seriously. Good diet and lifestyle habits help oral health, along with routine flossing and brushing and preventative treatments like fluoride treatments and dental exams.

Type of fillings

Fillings come in many varieties, each with a different lifespan. Amalgam fillings are created from a combination of metals and can last for up to 15 years. Composite fillings are made of resin, look like natural teeth, and can last between five to 10 years. Ceramic fillings are natural-looking and strong, and have a lifespan of up to 15 years or more. Glass ionomers are used primarily for baby teeth and last about five years.

Genetics

Genetics also affect dental health. A patient’s family health history could make them more prone to dental issues like cavities, gum disease, and weak enamel. Such patients may experience decay or enamel erosion more frequently and have shorter-lasting fillings.

Also, hereditary factors like immune response, saliva composition, and tooth structure can influence the durability of fillings in the long run. Such individuals need to put in more effort in terms of oral care.

General well-being

Different health issues affect oral health and how long tooth fillings last. Conditions such as diabetes, osteoporosis, and autoimmune disorders make the gums and supporting bone structure of the teeth weaker, causing the fillings to fail prematurely. Dry mouth can also be a side effect of medications like medications for hypertension or chemotherapy. Habits like smoking can damage oral tissues and shorten the life expectancy of dental fillings.