Dental Care Before Chemotherapy: What Patients Should Know

Chemotherapy uses medications to destroy cancer cells or interfere with their growth.

However, some chemotherapy medications can also affect healthy cells, including cells involved in immune function and those lining the mouth.

During treatment, patients may experience:

• Dry mouth

• Mouth sores

• Gum inflammation

• Changes in taste

• Increased susceptibility to certain infections

• Difficulty eating or maintaining oral hygiene

• Delayed healing in some circumstances

An existing dental infection, untreated cavity, or advanced gum problem may become more concerning if the immune system is weakened.

A dental examination before treatment allows the dentist to identify potential problems and determine whether preventive care or treatment is needed.

The purpose of a pre-chemotherapy dental assessment is to identify oral health risks and address appropriate concerns without unnecessarily delaying cancer treatment.

Ideally, patients should inform their dentist as soon as they learn that chemotherapy is planned.

When the treatment schedule permits, arranging a dental examination several weeks before chemotherapy may provide time to assess oral health and complete necessary treatment.

However, the appropriate timing depends on:

• When chemotherapy is scheduled to begin

• The type of cancer and treatment regimen

• The patient's medical condition

• Whether dental infections are present

• The type of dental treatment required

• The expected healing period after any procedure

Some patients may have only a short period between diagnosis and treatment.

If chemotherapy is starting soon, a dental consultation may still be useful for identifying urgent concerns and providing oral hygiene guidance.

Do not postpone chemotherapy to complete routine dental work unless your oncologist specifically recommends a change to the treatment schedule.

Your dentist and oncology team should coordinate when dental treatment could affect the timing or safety of cancer care.

A pre-chemotherapy dental examination is intended to evaluate the condition of your teeth, gums, and oral tissues.

Your dentist may assess the following areas.

Teeth and Existing Fillings

The dentist checks for cavities, fractures, damaged fillings, and other structural problems.

Gum Health

The gums are examined for inflammation, periodontal disease, and signs of infection.

Existing Crowns and Bridges

Dental restorations may be checked for loose components, damaged margins, or areas that trap food and plaque.

Oral Soft Tissues

The dentist examines the tongue, cheeks, lips, palate, and other tissues for unusual lesions, ulcers, or signs of infection.

Dentures and Dental Appliances

Removable dentures or other appliances may be assessed for rough edges, pressure points, and irritation.

Dental X-rays

Dental imaging may be recommended when clinically appropriate to evaluate problems that cannot be fully identified through visual examination.

The findings help the dentist determine whether treatment is needed before chemotherapy begins.

If a patient has untreated tooth decay, the dentist may recommend treatment before chemotherapy when feasible.

However, not every cavity requires the same approach.

Small Cavities

Some cavities may be suitable for a relatively straightforward dental filling.

Deep Cavities

More extensive decay may require additional assessment to determine whether the tooth can be restored with a filling, crown, or another treatment.

Tooth Infection

If decay has affected the dental pulp and caused infection, root canal treatment or extraction may need to be considered.

The appropriate decision depends on the condition of the tooth, the patient's medical status, and the time available before chemotherapy.

The dentist should prioritise problems that may cause pain, infection, or complications during cancer treatment.

Professional dental cleaning may be recommended as part of preventive care before chemotherapy.

Plaque and tartar can contribute to gum inflammation and periodontal disease.

A dental examination can help determine whether a patient would benefit from:

• Routine scaling and polishing

• Oral hygiene instruction

• Management of gum inflammation

• Periodontal assessment

• Additional preventive treatment

However, patients with significant periodontal disease may require more than routine cleaning.

Deep periodontal procedures or other invasive treatment should be planned carefully, particularly when chemotherapy is scheduled to begin soon.

The dentist may need to coordinate treatment timing with the oncology team.

A severely damaged or infected tooth may sometimes require extraction.

However, tooth extraction is an invasive procedure that requires appropriate healing.

If an extraction is being considered before chemotherapy, the dentist and oncologist should discuss:

• The urgency of the dental problem

• The patient's medical condition

• Expected healing time

• Risk of infection

• Blood counts, when relevant

• The chemotherapy start date

• Whether a less invasive alternative is appropriate

Whenever possible, sufficient healing time should be allowed before chemotherapy begins.

The required interval varies according to the procedure, the patient's health, and the oncology treatment plan.

Patients should not undergo elective tooth extraction immediately before chemotherapy without appropriate medical and dental assessment.

Yes. Certain chemotherapy treatments can affect the immune system and blood cell counts.

These changes may influence the gums and surrounding oral tissues.

For example, patients may experience increased susceptibility to infection or bleeding when blood counts are affected.

Existing gum disease may also complicate oral care during treatment.

Before chemotherapy, your dentist may assess:

• Gum inflammation

• Plaque and tartar deposits

• Periodontal pockets

• Tooth mobility

• Signs of active infection

• Areas of persistent bleeding

Maintaining gum health before treatment may help reduce preventable oral complications.

Understanding potential side effects can help patients prepare.

Not everyone will experience these problems, and their severity depends on the chemotherapy regimen and individual medical circumstances.

Dry Mouth

Some patients experience reduced saliva production or a persistent feeling of dryness.

Dry mouth can affect speaking, swallowing, eating, and oral comfort. It may also increase the risk of tooth decay.

Mouth Sores

Chemotherapy may cause oral mucositis, which can lead to painful inflammation or ulcers inside the mouth.

Oral Infections

Changes in immune function can increase susceptibility to certain infections, including oral fungal infections.

Taste Changes

Patients may notice metallic tastes, reduced taste sensitivity, or changes in food preferences.

Gum Bleeding

Some patients may develop bleeding problems related to changes in platelet counts or other medical factors.

Any unusual bleeding should be discussed with the oncology team.

A simple and gentle oral care routine can be helpful before treatment begins.

Brush Twice Daily

Use a soft-bristled toothbrush and fluoride toothpaste, unless your healthcare team recommends a different approach.

Clean Between Your Teeth

Floss or use another suitable interdental cleaning method if your gums and medical condition allow it.

If you develop significant bleeding, painful oral tissues, or low platelet counts during treatment, ask your oncology and dental teams whether your routine should be modified.

Avoid Irritating Mouthwashes

Alcohol-containing mouthwashes may worsen dryness or irritation.

Your dentist may recommend a gentler alternative.

Stay Hydrated

Drink water regularly unless your medical team has advised fluid restrictions.

Check Your Mouth

Look for unusual sores, swelling, white patches, or persistent bleeding.

Ask About Fluoride

Patients with dry mouth or increased cavity risk may benefit from additional fluoride measures prescribed or recommended by their dentist.

Yes.

It is important to inform your dentist about your cancer diagnosis and planned treatment.

Your dentist may need information about:

• Type of cancer

• Planned chemotherapy regimen

• Treatment start date

• Current medications

• Medical conditions

• Previous cancer treatments

• Recent blood tests, when relevant

• Recommendations from your oncology team

This information helps the dentist determine which treatments are appropriate and whether medical clearance or coordination is required.

Patients should also tell their dentist if they are receiving medications such as bisphosphonates or denosumab, which may affect dental treatment planning because of the risk of medication-related osteonecrosis of the jaw.

There is no universal list of dental treatments that must be avoided by every patient preparing for chemotherapy.

However, the urgency and timing of treatment should be carefully considered.

Elective procedures that are not medically necessary may sometimes be postponed, especially if they require healing or could interfere with cancer treatment.

Examples include:

• Elective cosmetic veneers

• Non-essential tooth whitening

• Elective implant surgery

• Other non-urgent invasive dental procedures

In contrast, treatment for an active dental infection may need to be prioritised.

The decision should be based on the patient's medical condition and the recommendations of the treating healthcare professionals.

Once chemotherapy begins, dental care may require additional precautions.

For certain procedures, the dentist may need to consider the patient's current blood counts and treatment schedule.

Low white blood cell counts can increase infection risk, while low platelet counts may increase bleeding risk.

This is especially important for invasive dental treatment.

Some routine dental care may still be possible, but the dentist should be informed about the patient's active cancer treatment.

Never assume that dental treatment is automatically safe or automatically prohibited during chemotherapy. The appropriate decision depends on the individual medical circumstances.

Patients receiving chemotherapy should promptly report concerning oral symptoms.

Contact your oncology team urgently if you experience:

• Fever of 38°C or higher, or the threshold specified by your oncology team

• Severe mouth pain

• Facial or gum swelling

• Difficulty swallowing or drinking

• Uncontrolled oral bleeding

• Signs of dehydration

• Rapidly worsening mouth sores

• Suspected dental or oral infection

A fever during chemotherapy can indicate a serious infection and requires urgent medical assessment.

For tooth pain, broken restorations, or other dental concerns, inform your dentist and oncology team so that appropriate treatment can be coordinated.