Years of Cold Sensitivity, Then One Week It Changed

Quick answer: Ordinary sensitivity is a brief zing that stops the instant the cold is gone. A dying nerve lingers for thirty seconds or more, starts responding to heat, and eventually aches on its own. The change in character matters far more than the intensity.

The call

Shira, 47, from Moshav Zanoach, had lived with sensitive teeth for the better part of a decade. Recession on the upper left, a sensitive-teeth toothpaste she bought by the crate, and an accepted rule never to drink anything with ice.

She almost did not phone. What made her pick up the phone was that it had begun to feel different — a dull background ache in the afternoons that had nothing to do with what she ate or drank, and a jolt from a hot bowl of soup, which had never happened before.

Coming in from a yishuv for a dental appointment is a half-day, so she had been putting it off. That is a very common story out here.

What we found

Her long-standing sensitivity was genuine and generalised — several teeth with exposed root surfaces from recession, all giving the classic brief zing to cold air.

But one tooth behaved differently. The upper left second premolar had a large old composite filling, and when we applied cold it produced a sharp pain that carried on for close to a minute after we removed the stimulus. Warm water reproduced her soup pain immediately. It was slightly tender to firm tapping.

Under the filling was extensive decay tracking towards the pulp horn. The x-ray showed the decay reaching the nerve chamber and a slight widening of the ligament space at the root tip — the very first radiographic sign that the inflammation has begun to reach beyond the tooth.

The distinction is worth spelling out, because it is the most useful thing a patient can learn:

• Dentine sensitivity: brief, sharp, stops immediately, triggered by cold, air or sweet things, often on several teeth.
• Reversible pulpitis: sharper, still stops within seconds, one tooth, usually a filling or decay involved.
• Irreversible pulpitis: lingers well beyond the stimulus, heat becomes a trigger, spontaneous ache, worse lying down. One tooth. Needs a root canal.

What we did

Root canal treatment on the premolar, completed in two visits, followed by a crown. Premolars in the upper jaw often have two canals in a single root, which is easy to miss without magnification and is a common cause of a root canal that never quite settles. Both were located and treated.

We also addressed the underlying sensitivity properly, which nobody had done in ten years: fluoride varnish on the exposed root surfaces, a switch to a soft brush and a modified brushing technique, since her recession was largely from years of scrubbing hard with a firm brush.

The outcome

The ache went after the first visit. Eighteen months on the tooth is crowned and comfortable, and — the part she notices daily — her general sensitivity is far better than it has been in years. She drinks cold water again.

What to do if this happens to you

1. Time the pain. Count how long it lasts after the cold is removed. Under five seconds is sensitivity; over thirty is a nerve problem.
2. Note whether heat triggers it. Heat pain is a strong sign the nerve is dying.
3. Note whether it aches on its own, unprovoked, especially at night.
4. See whether it is one tooth or several. Generalised means sensitivity; one tooth means look harder.
5. Do not just keep buying sensitive toothpaste. It is a good product for the wrong problem here.
6. Get seen within a day or two once the character has changed. The window before an abscess is short.

Coming in from Zanoach, Mahseya or Yishi? Ramat Beit Shemesh Urgent Dental Care groups appointments so one trip covers the family. 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.