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Causes of Periodontal Disease

Periodontal disease, which is also known as gum disease and periodontitis, is a progressive disease which, if left untreated, may result in tooth loss.  Gum disease begins with the inflammation and irritation of the gingival tissues which surround and support the teeth.  The cause of this inflammation is the toxins found in plaque which cause an ongoing bacterial infection.

The bacterial infection colonizes in the gingival tissue, and deep pockets form between the teeth and the gums.  If treated promptly by a periodontist, the effects of mild inflammation (known as gingivitis) are completely reversible.  However, if the bacterial infection is allowed to progress, periodontal disease begins to destroy the gums and the underlying jawbone, promoting tooth loss.  In some cases, the bacteria from this infection can travel to other areas of the body via the bloodstream.

Common Causes of Gum Disease

There are genetic and environmental factors involved in the onset of gum disease, and in many cases, the risk of developing periodontitis can be significantly lowered by taking preventative measures.

Here are some of the most common causes of gum disease:

  • Poor dental hygiene – Preventing dental disease starts at home with good oral hygiene and a balanced diet.  Prevention also includes regular dental visits which include exams, cleanings, and x-rays.  A combination of excellent home care and professional dental care will preserve the natural dentition and support of bony structures.  When bacteria and calculus (tartar) are not removed, the gums and bone around the teeth become affected by bacterial toxins and can cause gingivitis or periodontitis, which ultimately lead to tooth loss.
  • Tobacco use – Research has indicated that smoking and tobacco use are some of the most significant factors in the development and progression of gum disease.  In addition to smokers experiencing a slower recovery and healing rate, smokers are far more likely to suffer from calculus (tartar) build-up on teeth, deep pockets in the gingival tissue, and significant bone loss.
  • Genetic predisposition – Despite practicing rigorous oral hygiene routines, as much as 30% of the population may have a strong genetic predisposition to gum disease.  These individuals are six times more likely to develop periodontal disease than individuals with no genetic predisposition.  Genetic tests can be used to determine susceptibility and early intervention can be performed to keep the oral cavity healthy.
  • Pregnancy and menopause – During pregnancy, regular brushing and flossing is critical. Hormonal changes experienced by the body can cause the gum tissue to become more sensitive, rendering them more susceptible to gum disease.
  • Chronic stress and poor diet – Stress lowers the ability of the immune system to fight off disease which means bacterial infection can beat the body’s defense system.  Poor diet or malnutrition can also lower the body’s ability to fight periodontal infections, as well as negatively affecting the health of the gums.
  • Diabetes and underlying medical issues – Many medical conditions can intensify or accelerate the onset and progression of gum disease including respiratory disease, heart disease, arthritis and osteoporosis.  Diabetes hinders the body’s ability to utilize insulin which makes the bacterial infection in the gums more difficult to control and cure.
  • Grinding teeth – The clenching or grinding of teeth can significantly damage the supporting tissue surrounding the teeth.  Grinding one’s teeth is usually associated with a “bad bite” or the misalignment of the teeth.  When an individual is suffering from gum disease, the additional destruction of gingival tissue due to grinding can accelerate the progression of the disease.
  • Medication – Many drugs including oral contraceptive pills, heart medicines, anti-depressants, and steroids affect the overall condition of teeth and gums, making them more susceptible to gum disease.  Steroid use promotes gingival overgrowth, which makes swelling more commonplace and allows bacteria to colonize more readily in the gum tissue.

Treatment of Gum Disease

Periodontists specialize in the treatment of gum disease and the placement of dental implants.  A periodontist can perform effective cleaning procedures in deep pockets such as scaling and root planing; they can also prescribe antibiotic and antifungal medications to treat infection and halt the progression of the disease.

In the case of tooth loss, the periodontist is able to perform tissue grafts to promote natural tissue regeneration, and insert dental implants if a tooth or several teeth are missing.  Where gum recession causes a “toothy” looking smile, the periodontist can recontour the gingival tissue to create an even and aesthetically pleasing appearance.

Preventing periodontal disease is critical in preserving the natural dentition.  Addressing the causes of gum disease and discussing them with your dentist will help prevent the onset, progression, and recurrence of periodontal disease.

If you have any questions or concerns about the causes or treatments pertaining to gum disease, please ask your dentist.

Frequently Asked Questions
Causes of Periodontal Disease, TX

The primary cause of periodontal disease is plaque — a sticky, colorless film of bacteria that constantly forms on teeth. When plaque isn’t removed daily, it hardens into tartar (calculus), which can only be removed by a dental professional. The bacteria in plaque and tartar release toxins that irritate gum tissue, leading to inflammation, infection, and eventually destruction of the gums and bone that support your teeth.
No. While inadequate brushing and flossing are the most common cause, periodontal disease can also be triggered or worsened by genetics, hormonal changes, certain medications, chronic illnesses (especially diabetes), smoking and tobacco use, poor nutrition, stress, teeth grinding, and a weakened immune system. Sometimes even people with good oral hygiene can develop gum disease due to these other factors.
Tobacco use is one of the strongest risk factors for periodontal disease. Smoking weakens the immune system, reduces blood flow to the gums, slows healing, and masks early warning signs like bleeding. Smokers are far more likely to develop gum disease, experience faster progression, and respond poorly to treatment compared to non-smokers. Smokeless tobacco carries similar risks.
Yes. Research shows that some people are genetically more prone to developing periodontal disease, even with good oral hygiene. If you have a family history of gum disease or tooth loss at a relatively young age, you may need to be especially diligent with your oral care and visit our office more frequently for preventive treatments.
Diabetes and periodontal disease have a strong two-way relationship. People with poorly controlled diabetes are at much higher risk for developing gum disease, and their disease tends to be more severe. At the same time, untreated gum disease can make blood sugar harder to control. Managing both conditions together is essential for overall health.
Yes. Hormonal fluctuations during puberty, menstruation, pregnancy, and menopause can make gums more sensitive and more vulnerable to infection. Pregnant women in particular are at increased risk for gingivitis, sometimes called “pregnancy gingivitis.” Hormonal changes don’t cause gum disease alone, but they amplify the effects of plaque and make consistent oral hygiene even more important.
Certain medications can contribute to gum problems. These include some blood pressure medications, antidepressants, oral contraceptives, antihistamines, anti-seizure drugs, and chemotherapy medications. Side effects can include dry mouth (which increases plaque buildup), gum overgrowth, and reduced healing capacity. Always tell us about every medication you take so we can adjust your care plan accordingly.
Chronic stress weakens the immune system, making it harder for your body to fight off infections — including the bacteria that cause gum disease. Stress also leads to behaviors that worsen oral health, such as skipping brushing, grinding teeth, smoking, and eating poorly. Managing stress through healthy lifestyle choices can support your gum health along with your overall well-being.
Yes, indirectly. Grinding or clenching puts excessive force on teeth and the supporting bone and gum tissue. While bruxism doesn’t cause gum disease on its own, it can accelerate bone loss and worsen the effects of existing periodontal disease. A custom nightguard from our office can help protect your teeth, jaw, and gum support.
Yes. A diet high in sugar and refined carbohydrates feeds the bacteria that cause plaque and gum disease. A diet low in essential nutrients — especially vitamin C, vitamin D, calcium, and antioxidants — weakens gum tissue and the body’s ability to fight infection. Eating a balanced diet rich in fruits, vegetables, lean proteins, and whole grains supports strong, healthy gums.
Yes. Crooked, crowded, or misaligned teeth are harder to clean effectively, which allows plaque and tartar to build up in hard-to-reach areas. Uneven bite forces can also damage gum tissue and accelerate bone loss in already-affected areas. Orthodontic treatment may be recommended to improve both your bite and your long-term gum health.
Yes. Saliva plays a critical role in washing away food particles, neutralizing acids, and fighting bacteria. When saliva is reduced — due to medications, certain medical conditions, or aging — plaque can accumulate more easily and harm gum tissue. If you experience chronic dry mouth, talk to us about strategies to protect your oral health.c
Yes. Conditions like heart disease, respiratory disease, HIV/AIDS, autoimmune disorders, and certain cancers can either contribute to periodontal disease or make it harder to treat. Treating both the systemic condition and the gum disease together is essential. We may coordinate care with your physician to support your overall health.
Yes. Risk factors that increase your likelihood of developing periodontal disease include smoking or tobacco use, diabetes, a family history of gum disease, hormonal changes, certain medications, poor nutrition, chronic stress, weakened immune system, and inconsistent oral hygiene. People with multiple risk factors should pay extra attention to prevention and visit our office more frequently.
The best prevention combines daily home care and professional support. Brush twice a day with fluoride toothpaste, floss every day, avoid tobacco, eat a balanced diet, manage chronic conditions like diabetes, reduce stress, and visit us every six months for cleanings and exams. Catching early signs of gum disease during routine visits is one of the most powerful tools we have to protect your smile.