Updated on July 31, 2024
4 min read

What Is the Role of Genetics in Oral Health?

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Genetics plays a significant role in shaping an individual’s oral health. While factors such as diet, oral hygiene habits, and access to dental care are crucial, hereditary dental issues can significantly impact a person’s dental well-being.

This article explores the most recent statistics on hereditary dental disorders. Understanding genetic influences on oral health is key to developing personalized dental care.

Prevalence of Common Hereditary Dental Disorders

Several hereditary dental disorders affect a significant portion of the population with varying prevalence rates across different conditions.

  • Tooth agenesis ⁠— This means missing teeth, and it can range from one or a few missing teeth (hypodontia) to missing more than six teeth (oligodontia). This affects between 1.77% and 7.54% of people.
  • Supernumerary teeth — This is the opposite – having extra teeth. It’s less common, affecting between 0.1% and 3.8% of people.
  • Amelogenesis imperfecta — This group of conditions affects the enamel, the hard outer layer of teeth. It can make teeth weak, discolored, or sensitive. It’s estimated to affect 1 in 700 to 1 in 14,000 people.

Less Common Hereditary Dental Disorders

Some hereditary dental disorders are less prevalent but still pose significant challenges for affected people.

  • Dentinogenesis imperfecta — This affects the dentin, the layer under the enamel, and can make teeth weak and discolored. It affects 0.057% to 0.33% of people.
  • Taurodontism — This causes teeth to have enlarged pulp chambers and shorter roots. It affects 5.5% to 11.8% of people.
  • Ectodermal dysplasia — This group of conditions affects the development of teeth, hair, nails, and sweat glands. It’s rare, affecting only 1 in 10,000 to 1 in 100,000 people.

Severity of Oral Health Issues in Hereditary Dental Disorders

Inherited dental disorders significantly impact a person’s quality of life.

  • In amelogenesis imperfecta (AI), 72% of patients experience pain/sensitivity, and 76% are unhappy with their teeth’ appearance.
  • Dentinogenesis imperfecta (DI) leads to rapid tooth wear, fractures, and loss, with 79% of patients experiencing at least one damaged tooth.

These conditions severely affect oral health and overall well-being.

Impact on Quality of Life

Hereditary dental disorders can profoundly impact an individual’s quality of life.

  • One study showed people with amelogenesis imperfecta experience a reduced quality of life due to their oral health, 
  • Children and adolescents with hereditary dental disorders also often face social stigma and bullying due to the appearance of their teeth.
  • Stigma and bullying can lead to anxiety, depression, and low self-esteem.
  • The functional limitations and pain associated with hereditary dental disorders can affect a person’s ability to eat, speak, and perform daily activities, further impacting their overall quality of life.

Ethnic Variations in Congenitally Missing Teeth

The rates of congenitally missing teeth (hypodontia) vary significantly among ethnic groups.

  • A study on Caucasian orthodontic and non-orthodontic patients found a prevalence of 5.5% in the orthodontic group and 4% in the non-orthodontic group.
  • Among Japanese orthodontic patients, the prevalence of hypodontia was reported at 7.54%.
  • In a Turkish population, the prevalence of hypodontia was observed to be 6.2%, with no significant difference between boys and girls.AD 4nXd4GH6C6 uAw6CG5qSt3U0T4fu7w8uBDV967bu65bB6U9boKdWPE49Kh dEcontkiIsfFIaBsZjI6SI75zanobrRDYwPfQK5QrtJaz23ZCIlVEH0aGdBLstk38rHrFbNcAzlTe 8RCJrI0cdH NJ9vhUPM?key=hT43hFryID HsXLq4N6WEg

Prevalence of Congenitally Missing Teeth in Various Populations

The prevalence of congenitally missing teeth varies significantly across different populations.

The table below illustrates this variation, showcasing the prevalence in specific populations and highlighting the wide range found within European populations.

PopulationPrevalence
Arab orthodontic patients11%
Kenyan population2.8%
Iranian (missing 3rd molars)34.8%
European populations3% to 11%

Genetic Basis of Ethnic Variations

Studies have identified several genes, such as PAX9, MSX1, and AXIN2, that are associated with tooth agenesis.

  • Mutations in these genes can lead to hypodontia or oligodontia.
  • The frequency of these genetic mutations varies across different populations, contributing to the observed ethnic differences in the prevalence of congenitally missing teeth.

Understanding genetic variations allows for tailored prevention and treatment for diverse ethnic groups.

Impact of Genetic Testing and Personalized Medicine

Advancements in genetic testing and personalized medicine are revolutionizing dental care for those with inherited dental problems.

Here’s how:

  • Personalized treatment plans ⁠— By looking at your genes, dentists can create a care plan specifically for you, leading to better management of problems like tooth decay, gum disease, and even oral cancer.
  • Early detection Genetic testing can identify those at higher risk for certain conditions, like weak enamel or dentin. This allows for earlier and more effective treatment.
  • Precision diagnosis and treatment — With information from your genes, dentists can pinpoint the exact cause of your problem and create a treatment plan that’s more likely to work. They can even include adjusting your medication to be safer and more effective for you.

Gene-Based Therapies and Regenerative Dentistry

Genetic advancements in dentistry are paving the way for groundbreaking treatments. 

  • Gene therapy and editing techniques hold the potential for correcting genetic mutations responsible for inherited disorders. 
  • Stem cell-based therapies offer hope for regenerating damaged or missing dental tissues like enamel and dentin. 

These innovative approaches promise more effective, longer-lasting, and biologically compatible solutions for people with hereditary dental conditions, ultimately improving their quality of life.

Genetics plays a significant role in oral health, as seen by the prevalence of hereditary dental disorders that affect a considerable portion of the population. Understanding the genetic aspects of oral health is crucial for developing personalized dental care. 

Advances in genetic testing and personalized medicine offer promising avenues of care. By leveraging these advancements and focusing on early detection and prevention, we can work towards ensuring optimal dental health for everyone, regardless of their genetic predisposition.

Last updated on July 31, 2024
15 Sources Cited
Last updated on July 31, 2024
All NewMouth content is medically reviewed and fact-checked by a licensed dentist or orthodontist to ensure the information is factual, current, and relevant.

We have strict sourcing guidelines and only cite from current scientific research, such as scholarly articles, dentistry textbooks, government agencies, and medical journals. This also includes information provided by the American Dental Association (ADA), the American Association of Orthodontics (AAO), and the American Academy of Pediatrics (AAP).
  1. Appelstrand SB, Robertson A, Sabel N. “Patient-reported outcome measures in individuals with amelogenesis imperfecta: a systematic review.” Eur Arch Paediatr Dent, 2022.
  2. Lyne et al. “Patient-reported outcome measure for children and young people with amelogenesis imperfecta.” Br Dent J, 2021.
  3. Eliacik BK, Atas C, Polat GG. “Prevalence and patterns of tooth agenesis among patients aged 12-22 years: A retrospective study.” Korean J Orthod, 2021.
  4. Bozga A, Stanciu RP, Mănuc D. “A study of prevalence and distribution of tooth agenesis.” J Med Life, 2014.
  5. Gokkaya B, Kargul B. “Prevalence and Pattern of Non-Syndromic Hypodontia in a Group of Turkish Children.” Acta Stomatol Croat, 2016.
  6. Toupenay et al. “Amelogenesis imperfecta: therapeutic strategy from primary to permanent dentition across case reports.” BMC Oral Health, 2018.
  7. Cassia et al. “Prevalence of Dentinogenesis Imperfecta in a French Population.” J Int Soc Prev Community Dent, 2017.
  8. Nguyen et al. “Dentinogenesis Imperfecta and Caries in Osteogenesis Imperfecta among Vietnamese Children.” Dent J (Basel), 2021.
  9. Malcangi et al. “Precision Medicine in Oral Health and Diseases: A Systematic Review.” J Pers Med, 2023.
  10. Shimizu T, Maeda T. “Prevalence and genetic basis of tooth agenesis.” Japanese Dental Science Review, 2009.
  11. Jensen et al. “Lymphovascular Invasion and the Decision for Postmastectomy Radiation Therapy: A Cautionary Case Report.” Plast Reconstr Surg Glob Open, 2019.
  12. Bhowmik P, Nandy D. “Prediction of the strength and timing of sunspot cycle 25 reveal decadal-scale space environmental conditions.” Nat Commun, 2018.
  13. Kong Z, Hart M, Liu H. “Paving the Way From the Lab to the Field: Using Synthetic Microbial Consortia to Produce High-Quality Crops.” Front Plant Sci, 2018.
  14. Leemans et al. “Transcutaneous electrical nerve stimulation and heat to reduce pain in a chronic low back pain population: a randomized controlled clinical trial.” Braz J Phys Ther, 2021.
  15. Robu A, Mironov V, Neagu A. “Using Sacrificial Cell Spheroids for the Bioprinting of Perfusable 3D Tissue and Organ Constructs: A Computational Study.” Comput Math Methods Med, 2019.
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