He Wanted All Eleven Amalgams Out. We Replaced Two.

Quick answer: Replacing sound amalgam fillings removes healthy tooth structure and brings the nerve closer, for no health benefit that the evidence supports. Failing amalgams should be replaced. Sound ones are better left alone — and wanting them out for appearance is a legitimate reason that should be handled honestly.

The call

He had done a lot of reading, most of it from sites selling something, and he arrived expecting an argument.

Shmuel, 52, from Nachala U'Menucha, had eleven amalgam fillings, most placed in his twenties. He wanted all of them removed and replaced with composite, and he wanted it done as a course of treatment.

He deserved a straight answer, not a sales pitch in either direction.

What we found

Eleven amalgams. Examined individually, with x-rays:

• Seven sound. Well-adapted margins, no decay, no cracks, no fracture lines in the surrounding tooth, no sensitivity.
• Two failing. One with a fractured margin and recurrent decay visible on the x-ray, one with a crack running from the filling into the marginal ridge.
• Two borderline. Ditched margins with some staining, no decay demonstrable, no symptoms.

The safety question, which had to be addressed properly rather than deflected.

Dental amalgam contains mercury bound in an alloy. The major health bodies that have reviewed it — including the WHO, and the regulatory authorities in the EU and the US — have concluded that it does not cause illness in the general population. That is a substantial body of review, and the honest summary is that the health argument for removing sound amalgams is not supported.

There are genuine qualifications, and they are worth stating rather than glossing:

• True amalgam allergy exists and is very rare. It presents as a lichenoid reaction in the mucosa directly against the filling, and it is a real indication for replacement.
• Environmental concerns are real. Mercury entering the waste stream is why amalgam use is being phased down internationally under the Minamata Convention, and why practices use separators. That is an environmental argument, not a patient-health one, and conflating the two is where a good deal of confusion comes from.
• Pregnancy and children are groups where regulators have advised caution about placing new amalgam. That is about placement, not about removing existing sound fillings.
• The removal itself releases more mercury vapour than leaving the filling in place does. Removing eleven sound fillings produces a larger exposure than leaving them.

The cost that nobody mentions. Replacing a sound amalgam is not a like-for-like swap. Amalgam is held by the cavity shape; composite is bonded and needs a different preparation. In practice, replacing an amalgam almost always means a larger cavity than the one before it. Do that eleven times and some of those teeth move a step closer to needing a crown, and a couple move closer to needing a root canal.

That is the actual trade, and it is the one he had not been told about.

What we did

Replaced the two that were failing. Both had recurrent decay or a crack, and both needed doing regardless of any wider question.

Left the seven sound ones, with the reasoning explained and written down.

Photographed and monitored the two borderline ones, with a decision to review at each visit rather than act.

Addressed the appearance question honestly. He also disliked how they looked, which is a legitimate reason and does not need to be dressed up as a health concern. Two of the seven sound ones were visible when he laughed. We agreed to replace those two on cosmetic grounds, with him understanding that he was accepting a slightly larger restoration for an appearance benefit — a reasonable trade, made with the information in front of him.

Used protective measures during removal for the ones we did replace: high-volume suction, rubber dam isolation, and sectioning the amalgam rather than grinding it out. These reduce exposure during removal and are sensible technique regardless of one's view on the wider question.

The outcome

Four replaced in total — two failing, two for appearance. Seven left alone.

At three years the seven remaining amalgams are unchanged, and the two borderline ones have not progressed.

He was, by his own account, expecting either to be dismissed or to be sold a full-mouth replacement. Neither happened.

What to do if this happens to you

1. Ask for each filling to be assessed individually, with x-rays, rather than as a category.
2. Ask what replacing it would cost in tooth structure. Replacement cavities are always larger.
3. Separate the health question from the appearance question. Both are legitimate; they are not the same argument.
4. Be cautious of anyone recommending wholesale replacement on health grounds. The evidence does not support it.
5. Ask about isolation and suction for any amalgam being removed.
6. Mention any lichenoid patch against a filling. True allergy is rare and is a genuine indication.

Wondering about your old fillings? Ramat Beit Shemesh Urgent Dental Care assesses them one at a time. 055-985-8845 · WhatsApp https://wa.me/972559858845 · Harav Kook 28/1, Beit Shemesh

This is a composite clinical story. It reflects a presentation we see regularly in Beit Shemesh and Ramat Beit Shemesh; the name and details are illustrative and are not those of a real patient.