Can “Bad Teeth” Run in Your Family?

In the dental office, it’s common to hear patients say things like: “Cavities run in my family,” or “Everyone in my family lost their teeth by age 50,” or, more commonly, “My family has soft teeth.” But do these statements have merit? Can genetics cause bad teeth?

While factors such as diet, oral hygiene, habits, chronic diseases, deficiencies, and medications play a larger role in cavity and gum disease risk, genetics is a risk factor for several dental issues.

Here are some ways genetics can increase your risk of problems in the dental chair.

1. Cavity risk: The strength, acid/wear resilience, and thickness of enamel, the composition and acidity of the saliva, and the specific makeup of oral bacteria in your mouth are all linked to genetics. These are all things that can make a tooth more prone to getting cavities. Luckily, lifestyle factors can do a lot to reduce this risk.
2. Periodontal disease: Known commonly as “gum disease,” the inflammation and bone loss caused by this chronic disease are the leading cause of tooth loss (even higher than cavities). It’s also strongly linked to many other chronic health conditions like diabetes. About 30% of periodontal cases can be linked to genetics. If treated and managed early, damage can be minimal.
3. Oral cancer: Lifestyle habits such as tobacco or alcohol use are still the largest risk factors for oral cancer, followed by a more recent upsurge in cases linked to HPV. However, genetics can play a minor role in oral cancer risk. If oral cancer runs in your family, let your dentist know.
4. Tooth alignment and tissue ties: Facial development, which includes things like skull and jaw shape and growth, tooth size, and where tissues attach are very strongly tied to family facial traits and genetics. This area of dentistry is currently growing rapidly, with hopes that recognizing potential issues and intervening early will allow us modify growth and development to prevent many issues (both dental and whole-body) down the road.
5. Tooth shape and color: While the shape and “grooviness” of a tooth are primarily genetically driven, lifestyle mainly affects tooth color. However, the thickness of the enamel, blood supply, and underlying hues can genetically affect color.
6. Congenitally missing teeth: Some teeth are more likely to never form than others. Wisdom teeth and upper lateral incisors (the teeth on either side of the “two front teeth”) are the most common congenitally missing teeth. There’s definitely a familial risk to congenitally missing teeth.

While genetics can increase your risk of certain dental conditions, for the most part, early intervention and lifestyle choices, such as diet, oral hygiene, and routine dental care, can significantly influence whether those risk factors manifest as problems. Your choices outweigh the power of your genetics.