# Crowns and Bridges: Why a Crown After Root Canal, and Other Common Questions

By Dr. Sneha, BDS, MDS (Conservative Dentistry & Endodontics), The Dental Corner, Keshav Puram, New Delhi. Published 2026-11-07.

**Short answer:** A crown is a cap that covers and protects a weak tooth. A bridge replaces a missing tooth by joining an artificial tooth to crowns on the teeth beside the gap.

## When a crown is needed

- After root canal treatment, especially on back teeth
- A tooth with a very large filling
- A cracked or broken tooth
- A badly worn tooth
- To improve the shape or colour of a tooth

## Why a crown after a root canal?

A tooth that needed a root canal has usually lost a lot of structure to decay. It is more brittle and can crack under chewing forces. A crown holds it together and lets you chew normally. Leaving it uncrowned is the most common reason a root-canal-treated tooth is lost.

## Types of crowns

- **Metal-ceramic:** strong, with a tooth-coloured outer layer
- **Zirconia:** very strong and tooth-coloured, with no metal
- **All-ceramic:** the most natural look, often chosen for front teeth

Your dentist will suggest a type based on the position of the tooth, your bite and your budget.

## How it is done

1. The tooth is shaped under local anaesthesia.
2. An impression or digital scan is taken.
3. A temporary crown protects the tooth.
4. The final crown is checked for fit, bite and colour, and cemented, usually within a week.

## What a bridge is

When a tooth is missing, the teeth on either side can be crowned and used to support an artificial tooth between them. A bridge is fixed in place; you do not remove it.

## Why replace a missing tooth?

A gap lets neighbouring teeth tilt and the opposite tooth over-grow. This changes your bite, traps food and makes cleaning harder.

## Looking after crowns and bridges

- Brush twice a day, paying attention to the gum line
- Clean under a bridge with a floss threader or interdental brush
- Avoid biting very hard things such as ice or nut shells
- Have them checked every six months

With good care, crowns and bridges last many years.

## Book a visit

If you have questions about this, we are happy to help. Consultation at The Dental Corner, Keshav Puram starts at ₹100. Call or WhatsApp +91 80765 81730.

*This article is general information and does not replace an examination by a dentist.*