A filling and a crown may both be methods to repair teeth, but they both serve different purposes and are required for differing dental needs. A filling repairs a small area of damage or decay in a tooth by “filling in” the missing part. It’s usually used when most of the tooth is still strong and healthy.
A crown is a custom-made cap that covers the whole tooth to protect and strengthen it. Crowns are typically recommended when a tooth is badly damaged, weakened, cracked, or has a very large filling already.
Two ways to save a tooth
A filling is the equivalent of careful mending. An area of decay is removed and replaced with a sculpted material that sits within the tooth, preserving as much of the original structure as possible, the tooth is contoured by our dentists to still feel like yours and the right colour is chosen to create a seamless blend. It is discreet and ideal when the tooth is largely sound, with only a modest imperfection to correct.
A crown, by contrast, is more like commissioning a custom-made crown for a fragile frame. A temporary crown is created by hand by our dentists, using our smile sculpting technique and then beautifully crafted by our master ceramists into porcelain or ceramic. Crowns are made to sit over the whole surface, ensuring 360-degree protection.
Where a filling works inside the tooth, a crown works around it.
When do you need a filling?
There are moments when “less” is unquestionably more. A filling is usually the right choice when decay is limited, the tooth walls are still thick and strong, and the bite forces are not too demanding. Think of small to medium cavities, a chipped edge, or a worn groove: areas that need restoring, not reinventing.
In these cases, a filling is a wonderfully conservative approach. It preserves the natural architecture of the tooth, keeps preparation minimal and can be shaped with great finesse to match the contours and colour of the surrounding enamel. For a tooth that is fundamentally healthy but imperfect in a few places, a filling is often the most elegant solution.
When do you need a crown?
A crown steps in when the tooth requires more support than a filling can provide. Perhaps large sections have been lost to previous fillings, the tooth has fractured under biting pressure, or a root canal has left it hollowed out and vulnerable.
Covering and reinforcing the tooth with a crown redistributes the forces of chewing across a stronger, unified surface. The design is not just about beauty; it is about protection – a way of giving a compromised tooth a second life, without resorting to removal and replacement.
The difference between a crown
| Aspect | Filling | Crown |
| Coverage | Sits inside the tooth, in a cavity or small area | Encases the whole visible tooth above the gumline |
| Best for | Small–medium decay, chips, minor wear | Heavily damaged, cracked, or root-treated teeth |
| Tooth preservation | Very conservative; minimal reshaping | More reshaping; trades some enamel for protection |
| Strength | Supports modest forces on a mostly intact tooth | Reinforces a weakened or heavily restored tooth |
| Aesthetic potential | Blends into existing enamel subtly | Can completely redesign colour and shape if needed |
Can you put a crown over a filling?
Yes, and in many carefully planned cases, that is exactly what happens. A tooth may already hold one or more large fillings, which are then reshaped and incorporated into the preparation before a crown is made. The crown does not erase the filling; it collaborates with it, turning a collection of repaired areas into one coherent, reinforced whole.
At Bespoke Smile, something we will never do is use a crown to disguise a failing foundation. If the underlying filling is leaking, decayed or poorly bonded, simply placing a crown on top would be like building over damp walls. In a considered approach, old fillings are assessed, renewed where needed, and only then covered, ensuring that the beauty you see on the outside reflects stability within.