What Are Inlays, Onlays, and Overlays?
These are types of dental restorations made from porcelain or resin, designed to repair posterior teeth. Unlike traditional fillings, inlays and onlays are preferred when the damage to the tooth or the existing filling to be replaced exceeds 50% of the tooth’s diameter. They are also used in endodontically treated teeth as a more conservative alternative to crowns, helping to reinforce tooth strength.
Fabrication Process
These restorations are custom-made in a dental laboratory by a dental technician. The dentist takes an impression of the tooth, which is then sent to the lab for the fabrication of the onlay. The onlay is precisely shaped to fit perfectly on the tooth, covering weak spots and protecting it from future fractures.
Advantages of Inlays, Onlays, and Overlays
- High Durability: These restorations are much more resistant than regular fillings and can withstand strong chewing forces.
- Longevity: They can last for up to 20 years or more with proper care.
- Aesthetic Appeal: Made from materials that match the natural color and texture of the teeth, ensuring an excellent cosmetic result.
- Fracture Protection: The full coverage of the tooth prevents fractures and structural weaknesses.
- Enhanced Functionality: Restores the natural shape of the tooth, improving chewing efficiency and speech clarity.
Applications
- Extensive tooth decay
- Worn or broken teeth
- Large, deteriorated fillings
- Cosmetic enhancements
- Protection for cracked teeth
- Reinforcement of endodontically treated teeth
Comparison with Traditional Fillings
Compared to traditional fillings, inlays and onlays offer significant advantages:
- Durability: They are 5 to 10 times stronger than fillings.
- Longevity: They last 2 to 5 times longer than traditional fillings.
- Better Fit: They provide a precise and secure fit, reducing the risk of detachment.
- Fracture Prevention: They offer superior protection against cracks and fractures.
Inlays, onlays, and overlays are an excellent choice for restoring posterior teeth with extensive damage, worn fillings, or old amalgam restorations. Their durability, longevity, aesthetics, and fracture protection make them an ideal solution for restoring both function and the beauty of your smile.