News and advice from the world of dentistry

Practical information, expert articles and tips for a healthy smile.

When it makes sense to replace an old crown and when to leave it alone

The crown on your front tooth has served you for years, and suddenly you notice a dark line at the gum. Nothing hurts and the crown does not move. It may still be worth replacing. Equally, it may carry on serving you well.

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MUDr. Michal Bumbálek, Ph.D.

Approximate reading time: 5 min

Updated: 05.10.2026

Gag reflex at the dentist: when a scan can replace impressions

The impression tray presses against your palate, the material takes several minutes to set, and swallowing and talking become difficult. Anyone with a strong gag reflex may put off a crown or bridge because of an experience like this for longer than is good for the tooth.

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MUDr. Michal Bumbálek, Ph.D.

Approximate reading time: 5 min

Updated: 24.09.2026

Has your crown come off? What to do in the first few hours and what can wait until morning

You are holding your crown in your hand, it is half past eight in the evening and the surgery has already closed. The first thing on your mind is probably whether you will lose the tooth and whether the crown can go back on. The good news is that in many cases it can be reused after an examination.

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MUDr. Michal Bumbálek, Ph.D.

Approximate reading time: 6 min

Updated: 01.09.2026

Article author

MUDr. Michal Bumbálek, Ph.D.

Lead dentist at ONEDENT clinic, specialising in endodontics, aesthetic dentistry, implantology, prosthetics and periodontology. He has practised dentistry since 2009 and also teaches other dentists and publishes.

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Our aim is not simply to treat a tooth, but to find a solution you will still be happy with years from now.

— MUDr. Michal Bumbálek, Ph.D.