Sometimes, a tooth falls into a gray area. The cavity or damage is too big for a regular filling, but it’s not quite bad enough to justify grinding the whole tooth down for a crown.
At Smile Santa Maria Dental in Santa Maria, CA, Dr. Issa uses inlays and onlays to fill this gap. These are custom-made restorations that fit into your tooth like a puzzle piece. They allow us to save more of your natural enamel while providing the strength required for heavy chewing.
When Do We Use Them?
If you have a large old filling that needs replacing, or a molar that has fractured, a standard filling often isn’t enough. When a filling gets too big, it can act like a wedge. Biting down can actually cause the remaining thin walls of your tooth to crack.
Inlays and onlays are different. Because they are bonded (glued) to the tooth, they actually hold the structure together rather than pushing it apart.
- Inlays: Fit inside the center of the tooth (between the bumps/cusps).
- Onlays: Cover one or more of the bumps (cusps) of the tooth to protect them from fracture. We often call these “partial crowns.”
Inlays Vs. Traditional Fillings
The main difference is how they are made.
- Fillings: We pack soft material into the hole and harden it with a light. It’s great for small spots, but in large holes, it can shrink or leak over time.
- Inlays and onlays: These are solid pieces of porcelain made outside the mouth. Because they are solid, they don’t shrink. They are much harder and more durable than filling material, making them perfect for the back teeth that do all the grinding.
Precision Fit & Conservative Dentistry
Dr. Issa is a strong believer in conservative dentistry. The best material in your mouth is the enamel you were born with. Once we drill it away, it’s gone forever.
With a full crown, we have to shave down the entire tooth to fit the “helmet” over it. With an inlay or onlay, we only remove the damaged part. We leave your healthy enamel untouched. This approach keeps the tooth stronger and reduces the risk of needing a root canal later on.
Materials That Look & Act Like Teeth
Most inlays and onlays at Smile Santa Maria Dental are made from high-strength porcelain or zirconia.
These materials are translucent, meaning they handle light just like natural teeth. Once bonded in place, they are virtually invisible. They are also wear-resistant, meaning they won’t grind down over time as large composite fillings can.
The Digital Process
Just like with our crowns and clear aligners, we use digital technology to make the process comfortable.
- Prep: Dr. Issa cleans out the decay or old filling.
- Scan: We take a 3D digital scan of your tooth.
- Design: We design the restoration to fit your bite perfectly.
- Bonding: We cement the custom piece into place.
Because the fit is digital, it is incredibly precise. This leaves microscopic margins where bacteria can’t get in, helping the restoration last longer.
Caring For Your Restoration
Inlays and onlays are incredibly durable, but they require the same care as your natural teeth.
- Hygiene: You must floss. If you don’t clean between the teeth, decay can start at the edge of the inlay and undermine the whole restoration.
- Grinding: If you clench your jaw at night, the force can crack porcelain just like it cracks enamel. A night guard is often the best insurance policy for your dental work.
Long-Term
Protection
If you have a broken tooth or a large filling that worries you, you might not need a full crown. Inlays and onlays offer a stronger, more conservative way to rebuild your smile. Dr. Issa will evaluate your specific situation to see if this "middle ground" option is right for you. Call Smile Santa Maria Dental today to schedule an evaluation.