A dental crown is a tooth-shaped cap that covers a damaged or weakened tooth to restore its shape, strength and appearance. You usually need one after a large filling, a crack, root canal treatment or heavy wear. The main types are zirconia, E.max ceramic, porcelain-fused-to-metal and full metal, each suited to different teeth.
What is a dental crown?
A crown, sometimes called a cap, is a custom-made restoration that covers the whole visible part of a tooth, down to the gum line. Unlike a filling, which replaces only the missing part of a tooth, a crown wraps around the tooth and holds it together. This protects what remains of the natural tooth from cracking and lets you chew normally again.
Crowns belong to prosthodontics, the branch of dentistry that repairs and replaces teeth. They are made in a dental laboratory from a precise impression of your tooth and fixed in place with dental cement or an adhesive, so they are not removable like a denture. Crowns are also placed on top of dental implants and used as the supporting parts of a bridge.
When do you need a crown?
A dentist usually recommends a crown when a tooth is too weak or too damaged to be repaired reliably with a filling. Common situations include:
- A large filling or a deep cavity that leaves thin, fragile tooth walls.
- A cracked or fractured tooth, especially a back tooth that takes heavy chewing forces.
- A back tooth after root canal treatment, which tends to become more brittle over time (read why a crown is often recommended after root canal treatment).
- Teeth that are badly worn from grinding (bruxism) or from acid erosion.
- A dental implant that needs a visible tooth on top.
- Supporting a bridge that replaces a missing tooth.
- A severely discoloured or misshapen tooth where a veneer would not be enough.
Not every damaged tooth needs a crown. If enough healthy tooth structure remains, a filling or a partial restoration may be the more conservative choice. A clinical examination and, where needed, an X-ray are the only reliable way to decide.
The main types of dental crowns
Crowns are grouped by the material they are made from. Each material balances strength, appearance and the amount of tooth that has to be shaped to make room for it.
Zirconia crowns
Zirconia is a very strong, tooth-coloured ceramic. It resists chipping and fracture well, which makes it a common choice for molars and for people who clench or grind. Modern layered zirconia looks considerably more natural than older versions, although it can be slightly less translucent than glass-ceramics.
E.max (lithium disilicate) crowns
E.max is a glass-ceramic known for its translucency, meaning that light passes through it much as it does through natural enamel. It is often preferred for front teeth and visible premolars, where appearance matters most. It is strong for a ceramic, though usually not as strong as zirconia under very heavy biting forces. For a detailed comparison, read zirconia or E.max crowns for front and back teeth.
Porcelain-fused-to-metal crowns
These crowns have a metal inner layer covered with porcelain. They have a long track record and are strong, but the metal can show as a dark line at the gum edge, especially if the gum recedes, and the porcelain layer can chip. Learn more in zirconia versus porcelain-fused-to-metal crowns.
Full-metal crowns
Gold alloys and other metals are very durable and need little tooth reduction, but their colour means they are generally limited to back teeth that are not visible. Fewer patients choose them today for aesthetic reasons.
Temporary crowns
A temporary crown, usually made of acrylic or resin, protects the tooth while the permanent crown is being made in the laboratory. It is not designed to last, so it needs a little extra care for a short period.
| Material | Appearance | Strength | Typical use |
|---|---|---|---|
| Zirconia | Natural, slightly more opaque | Very high | Molars, premolars, people who grind |
| E.max | Very natural, translucent | High | Front teeth, premolars |
| Porcelain-fused-to-metal | Good, possible dark margin | High, porcelain may chip | Front or back teeth |
| Full metal | Metallic colour | Very high | Back teeth out of sight |
Crown or another option?
A crown is one of several ways to restore a tooth. Your dentist will usually suggest the least invasive option that can still be expected to last:
- Filling: suitable when the damage is small to moderate and the remaining tooth walls are strong.
- Onlay or partial crown: covers only the damaged part of the biting surface and keeps more natural tooth.
- Veneer: a thin shell bonded to the front surface of a front tooth, mainly to change colour or shape; it does not protect a weakened tooth the way a crown does.
- Composite bonding: tooth-coloured resin applied directly to the tooth, useful for small chips.
- Extraction followed by an implant or a bridge: considered only when the tooth cannot be saved.
The right choice depends on how much healthy tooth is left, where the tooth sits in your mouth, how you bite and what matters most to you. A good dentist explains the options and lets you decide with full information.
The crown procedure step by step
In most cases a crown is completed in two appointments, roughly one to three weeks apart, depending on the time the laboratory needs.
- Examination and planning: the dentist checks the tooth, the gum and the nerve, often with an X-ray, and discusses the choice of material with you. If the tooth has deep decay or an infected nerve, this is treated first.
- Local anaesthesia: the tooth and the surrounding gum are numbed so that the preparation is comfortable.
- Preparing the tooth: a thin, even layer is removed from the outside of the tooth to make room for the crown. If too little tooth remains, it may first be rebuilt with a core filling.
- Impression and shade: an accurate impression of the prepared tooth and the opposing teeth is taken, and the colour is matched to your neighbouring teeth.
- Temporary crown: a temporary crown is fitted so that you can eat and smile normally while you wait.
- Fitting the permanent crown: at the second visit the temporary crown is removed, and the dentist checks the fit, the contacts with neighbouring teeth, your bite and the colour before cementing or bonding the final crown.
The preparation visit usually takes around an hour, sometimes a little more for back teeth, and the fitting visit is often shorter.
Does getting a crown hurt?
The preparation is done under local anaesthesia, so most people feel pressure and vibration rather than pain. Once the numbness wears off, it is common for the tooth and gum to feel tender or sensitive to cold for a few days. Simple over-the-counter painkillers are usually enough. If you feel anxious, tell the dentist beforehand so that each step can be explained and you can ask for a pause whenever you need one.
Aftercare and how long crowns last
With a temporary crown, avoid sticky foods such as chewing gum or toffee, chew mainly on the other side, and slide dental floss out sideways rather than pulling it up. After the permanent crown is fitted, a slightly different bite usually feels normal within a few days; if the tooth feels high when you bite, ask for a quick adjustment.
A crown itself cannot decay, but the natural tooth underneath can, especially at the edge where crown and tooth meet. Daily care therefore matters:
- Brush twice a day with fluoride toothpaste, paying attention to the gum line.
- Clean between your teeth with floss or small interdental brushes.
- Avoid using your teeth to open packaging or to bite very hard objects such as ice.
- Wear a night guard if you grind your teeth.
- Keep regular check-ups and professional scaling.
According to the Cleveland Clinic overview of dental crowns, crowns typically last between five and fifteen years with proper care, and many last longer. Oral hygiene, biting forces and the material all play a role, as explained in our article on how long crowns and bridges last.
Risks, limitations and what affects the cost
Crowns are a routine and predictable treatment, but like any dental work they have limitations that are worth knowing before you start:
- Sensitivity: temporary sensitivity to hot and cold is common after the tooth is prepared.
- Nerve problems: occasionally a tooth that was already deeply damaged develops nerve inflammation later and needs root canal treatment.
- Chipping or fracture: ceramics can chip, particularly in people who grind their teeth.
- Loosening: the cement can weaken over time, and a loose crown should be checked promptly.
- Irreversibility: because the tooth is reshaped, it will always need a crown or a similar restoration afterwards.
There is no single price for a crown, because the cost depends on several factors: the material chosen, the position of the tooth, whether a build-up, root canal treatment or gum treatment is needed first, the number of teeth involved and the laboratory work. The clearest way to know what your treatment involves is a consultation, after which you receive a plan explained step by step.
Crowns at Ajam Dental Clinic in Tripoli
At Ajam Dental Clinic, crowns are part of our prosthodontic and aesthetic work. Dr. Abdel Rahman Ajam holds a DDS and an MSc in Aesthetic and Prosthetic Dentistry, and his focus includes crowns, bridges, veneers and smile design. We offer zirconia crowns and ceramic crowns, including E.max. When a tooth needs root canal treatment before its crown, this is carried out at the clinic by a visiting specialist endodontist.
You can read more about our prosthodontic treatments, including crowns and bridges, or meet the team on our about page. The clinic is on Fouad Chehab Boulevard, Al-Makateb Building, 1st Floor, Tripoli, and patients come to us from across the city — El Mina, Abu Samra, Al-Tall, Zahriyeh and Bahsas — as well as from Qalamoun and the rest of North Lebanon. To have a tooth assessed, contact us by WhatsApp or phone to book a consultation.
Frequently asked questions
Can a tooth with a crown still get a cavity?
Yes. The crown itself cannot decay, but the natural tooth underneath is still living tissue, and bacteria can attack it at the margin, the thin line where the crown meets the tooth near the gum. This is most likely when plaque is left along the gum line or when the gum recedes and exposes part of the root. Brushing twice a day with fluoride toothpaste, cleaning between the teeth every day and attending regular check-ups make this much less likely. If decay is found early at the edge of a crown, it can sometimes be repaired; if it spreads underneath, the crown may need to be replaced.
Will my crown look like my natural teeth?
A well-made tooth-coloured crown is designed to blend in with your neighbouring teeth. Before the crown is made, the dentist selects a shade that matches your teeth, and the laboratory reproduces the shape, surface texture and translucency. Glass-ceramics such as E.max are often chosen for front teeth because they let light pass through in a way similar to natural enamel, while modern zirconia also looks natural on most teeth. If you are thinking about whitening, it is best to do it before the crown colour is chosen, because a crown does not change colour with whitening.
What should I do if my crown comes loose or falls out?
Stay calm: this is usually not an emergency, but the tooth should be seen within a few days. Keep the crown in a clean, safe container and bring it with you, because it can often be re-cemented if both the crown and the tooth are in good condition. Until your appointment, avoid chewing on that side and keep the area clean with gentle brushing. Do not try to glue the crown back yourself with household adhesives, as this can damage the tooth and make proper re-cementing harder. If the exposed tooth is painful or very sensitive, mention it when you call or WhatsApp one of our dentists.
Do children ever need crowns on baby teeth?
Sometimes. When a baby molar has extensive decay or has had nerve treatment, a preformed crown, often made of stainless steel, may be placed to protect it until the adult tooth replaces it naturally. These crowns are usually fitted in a single visit and need much less preparation than adult crowns. Keeping a baby molar in place matters because it holds space for the permanent tooth and helps the child chew comfortably. Whether a crown, a filling or another option is best depends on the child's age, the tooth involved and how comfortable the child feels during treatment.
Does a tooth always need a root canal before a crown?
No. Many crowned teeth have a healthy, living nerve and never need root canal treatment. A root canal is only necessary when the nerve inside the tooth is infected, irreversibly inflamed or has died, which is usually detected through symptoms such as lingering pain or swelling, or through signs on an X-ray. The dentist checks the condition of the nerve before preparing the tooth. However, teeth that have already had root canal treatment, particularly back teeth, are often crowned afterwards to protect them from fracture, because they have usually lost a lot of their natural structure.
How long does a temporary crown stay in place?
A temporary crown usually stays in place for one to three weeks, the time the laboratory needs to make the permanent crown. It is fixed with a softer cement on purpose, so that the dentist can remove it easily at the next visit. During this period, avoid sticky and very hard foods, chew mainly on the other side and floss carefully by sliding the thread out sideways. If the temporary crown comes off, contact the clinic so it can be put back, because the prepared tooth can become sensitive or shift slightly without it. It is best not to leave it out for long.
Have a question about your teeth?
Send a WhatsApp message to Dr. Abdel Rahman Ajam or Dr. Soumaya Ajam, or call the clinic to book a consultation.
This article provides general information for patients. It does not replace an examination by a dentist, who can advise you on your own situation.