What Are Inlays for Teeth?

Dental inlays are custom-made restorations used to repair teeth that are too damaged for a standard filling but do not need a full dental crown. They are most commonly used on back teeth, such as molars and premolars, where chewing pressure is high.

An inlay fits inside the biting surface of the tooth. It restores the missing or damaged part of the tooth while helping to preserve as much natural tooth structure as possible.

When Are Dental Inlays Used?

A dentist may recommend an inlay when a tooth has moderate decay, a broken old filling, a crack, or damage that is too large for a simple filling.

Inlays are often used when the outer walls of the tooth are still strong, but the centre of the tooth needs a stronger and longer-lasting repair.

• The tooth has a large cavity.
• An old filling has failed.
• The damaged area is mainly inside the chewing surface.
• The dentist wants to avoid removing extra tooth structure for a crown.
• The tooth needs extra strength for chewing.

Inlay vs Filling vs Onlay vs Crown

A filling is usually used for smaller areas of decay or damage. It is placed directly into the tooth during the appointment.

An inlay is custom-made and bonded into the tooth. It sits within the biting surface and does not cover the raised edges of the tooth, known as cusps.

An onlay is similar to an inlay but larger. It covers one or more cusps and is sometimes described as a partial crown.

A crown covers most or all of the visible part of the tooth. It may be needed when a tooth is badly broken, heavily filled, root-treated, or weak.

What Are Dental Inlays Made From?

Dental inlays can be made from different materials. The best choice depends on the tooth, the bite, the patient’s preferences, and the dentist’s recommendation.

Porcelain or Ceramic Inlays

Porcelain and ceramic inlays are popular because they can be matched to the natural colour of the tooth. They are strong, stain-resistant, and often used when appearance is important.

Gold Inlays

Gold inlays are very strong and long-lasting. They are less common today because they are visible, but they can still be an excellent option for back teeth where strength is more important than appearance.

Composite Resin Inlays

Composite resin inlays can also be tooth-coloured. They may be less expensive than porcelain or gold, but they may not last as long, especially on teeth that take heavy chewing pressure.

How Is a Dental Inlay Fitted?

The treatment usually takes two appointments, although some dental practices can provide same-day inlays using digital technology.

At the first appointment, the dentist removes decay, old filling material, or weakened tooth structure. The tooth is then shaped so the inlay can fit properly.

An impression or digital scan is taken and used to make the custom inlay. A temporary filling may be placed while the final inlay is being made.

At the second appointment, the temporary filling is removed. The dentist checks the fit, shape, and bite before bonding the inlay securely into place. The inlay is then polished so it feels smooth and comfortable.

Benefits of Dental Inlays

The main benefit of an inlay is that it can restore strength while preserving more natural tooth than a crown.

• They are stronger than many large fillings.
• They are custom-made for a precise fit.
• They can last many years with good care.
• Tooth-coloured options can look natural.
• They preserve more natural tooth than a crown.
• They can help restore chewing function.

Disadvantages and Risks

Inlays are not suitable for every tooth. If the tooth is badly cracked, weak, or heavily damaged, a crown may be a better option.

• They usually cost more than standard fillings.
• They may require two appointments.
• The tooth may feel sensitive for a short time after treatment.
• The inlay can chip, crack, or come loose over time.
• Decay can still develop around the edges if oral hygiene is poor.
• The bite may need adjustment if it feels too high.

How Long Do Dental Inlays Last?

A well-made dental inlay can last many years. The lifespan depends on the material used, the quality of the fit, the patient’s bite, oral hygiene, diet, and whether the patient grinds their teeth.

Gold inlays are known for being very durable. Ceramic inlays can also last a long time and are popular because they look more natural.

No dental restoration lasts forever, so regular dental check-ups are important. This allows the dentist to check the edges of the inlay and spot any problems early.

How to Care for a Dental Inlay

A dental inlay should be cared for in the same way as a natural tooth.

• Brush twice a day with fluoride toothpaste.
• Clean between the teeth daily.
• Attend regular dental check-ups.
• Avoid chewing very hard objects such as ice or pens.
• Wear a night guard if you grind or clench your teeth.

Are Dental Inlays Worth It?

Dental inlays can be a very good option when a tooth needs more support than a standard filling but does not need a full crown.

They are especially useful when the tooth still has strong outer walls, but the inside of the biting surface needs a stronger repair.

They may be worth considering if a patient wants a restoration that is strong, long-lasting, and designed to preserve as much natural tooth as possible.

Conclusion

A dental inlay is a custom-made restoration used to repair moderate damage within the biting surface of a tooth. It is stronger and more precise than many standard fillings, but more conservative than a crown.

Inlays can be made from porcelain, ceramic, gold, or composite resin. Each material has different advantages, depending on the tooth being treated and the patient’s needs.

For the right tooth, an inlay can restore strength, function, and appearance while helping to protect the natural tooth structure.