Dental Clearance Before Chemotherapy, With Ten Days to Do It

Quick answer: Before chemotherapy or head and neck radiotherapy, any tooth likely to cause an infection in the following months should be dealt with — usually removed — because a dental infection during treatment is far harder to manage and can delay the cancer treatment itself. Extractions need two to three weeks to heal beforehand.

The call

Dovid, 63, from Beit Shemesh, was referred by his oncologist on a Sunday. He was due to start chemotherapy in ten days, and his consultant wanted a dental assessment first. He was, understandably, finding it hard to care about his teeth that week.

The reason it matters is worth explaining plainly, and we did.

What we found

The examination was thorough: full x-rays, a panoramic film, periodontal charting and vitality testing on every doubtful tooth.

Findings: two teeth with chronic infections at the root tips, one broken-down molar with deep decay, moderate gum disease with several 6mm pockets, and a partly erupted wisdom tooth with a history of pericoronitis.

Here is the reasoning behind clearance, which is not about perfect teeth but about risk over the coming months.

Chemotherapy suppresses the bone marrow. During the neutropenic periods between cycles, the body's ability to contain infection drops sharply. A tooth that would produce a manageable abscess in a healthy person can produce a serious systemic infection — and, critically, it can force a delay in the chemotherapy schedule, which is the outcome everyone is trying to avoid.

Head and neck radiotherapy carries a separate, lifelong consideration: osteoradionecrosis. Irradiated jawbone heals poorly, sometimes for the rest of the patient's life. An extraction after radiotherapy in the radiated field carries a real risk of bone that will not heal. That is why teeth of doubtful prognosis come out before, not after.

The timing is the constraint. Extraction sockets need roughly two to three weeks to heal to the point of soft tissue closure. Ten days was tight.

What we did

We phoned his oncologist the same day to confirm his blood counts and the exact start date, and to agree the plan. That call is not a formality.

Day one: extracted the broken-down molar, the wisdom tooth and one of the chronically infected teeth — all in one visit, under local anaesthetic. Doing them together bought healing time.

Day three: root canal treatment on the second infected tooth. It was a front tooth with a good prognosis, sound structure and easily cleanable, so treating rather than extracting was justified.

Day five: deep cleaning of the periodontal pockets, and a long session with the hygienist on technique.

Preventive protocol for the treatment period: high-fluoride toothpaste, a soft brush, an alcohol-free mouthwash, custom fluoride trays, and instructions for managing dry mouth and mucositis — both of which make decay accelerate dramatically during treatment.

We wrote to the oncologist confirming clearance.

The outcome

The sockets had healed enough by day ten, and his chemotherapy started on schedule.

He came for a dental review every three months throughout treatment. He developed mucositis and a dry mouth, both managed with topical measures, and no dental emergency ever interrupted his chemotherapy.

What to do if this happens to you

1. Ask for a dental assessment the moment cancer treatment is proposed, not the week before it starts.
2. Bring the oncologist's letter and the treatment start date.
3. Expect some teeth to be removed that could otherwise have been saved. The calculation is different.
4. Ask about fluoride trays and dry mouth management, especially for head and neck radiotherapy.
5. Keep up dental reviews during treatment, not just before.
6. Tell any dentist you see afterwards that you have had head and neck radiotherapy. It changes extraction planning permanently.

Starting cancer treatment? Ramat Beit Shemesh Urgent Dental Care carries out dental clearance and liaises with your oncology team. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh.

Based on real cases treated at the clinic. Names have been changed.