What Is a Dental Inlay or Onlay?
Some damaged back teeth fall into a middle zone. The damage is too large for a simple filling, yet most of the tooth is still healthy and strong.
That is where dental inlays and onlays come in, and our Portage, MI family dentist can talk with you about whether one fits your tooth.
Here's what you need to know about these lab-made restorations.
What Inlays and Onlays Are
An inlay or onlay is a custom piece made outside the mouth and then bonded into the tooth. Because it is made separately, dentists call it an .
Cleveland Clinic describes it as fitting into the existing tooth structure like a small puzzle piece. It replaces only the part of the tooth that was lost.
Inlay vs. Onlay
The difference is how much of the chewing surface the piece covers. An inlay sits inside the raised points of a molar or premolar, called cusps.
An onlay reaches over one or more of those cusps. It is a good fit when a corner of the tooth has broken or a cusp has been weakened.
How They Compare to a Filling
A standard filling is placed and shaped directly in the tooth during one visit. At Courtside Dental, every filling is tooth-colored composite resin, which bonds to the tooth and saves healthy structure.
Fillings work well for small and medium cavities. When a cavity is large, a big filling can leave thin tooth walls that are more likely to crack.
Our post on when you need a filling covers the common warning signs.
How They Compare to a Crown
A crown covers the whole visible part of the tooth. The notes a crown can strengthen a tooth when there isn't enough tooth left to hold a filling.
To make room for a crown, the outer layer of the tooth is filed down on every side. An inlay or onlay usually keeps more of the natural tooth, which is why Cleveland Clinic lists it as a .
When a Crown Is Still the Better Choice
An inlay or onlay is not right for every damaged tooth. A crown is often the safer option after a root canal, for a tooth with a deep crack, or when most of the tooth is already gone.
Our dental crowns page walks through that procedure, and our post on instances that call for a crown lists the usual reasons.
How Your Dentist Decides
The choice depends on how much healthy tooth remains, where the damage sits, and how hard you bite. X-rays and an exam show what a look in the mirror cannot.
Dr. Paul will explain each option for your tooth, from a tooth-colored filling to a full crown. The goal is always the most conservative repair that will hold up.
Signs a Back Tooth Needs Attention
Pain when biting, a broken corner, or an old filling that feels rough can all point to damage. New sensitivity is another clue, and our post on sudden tooth sensitivity explains the most common causes.
Catching damage early often means a smaller, simpler repair. Waiting can turn a filling or inlay into a crown.
Frequently Asked Questions
How many appointments does an inlay or onlay usually take?
Most inlays and onlays take two visits. The first visit prepares the tooth and records its shape, and the second places the finished piece after a lab makes it.
Cleveland Clinic notes some offices with in-house milling can finish in one visit. At Courtside Dental, impressions for custom restorations are taken with the DANDY digital scanner instead of putty, which takes under a minute.
What materials are inlays and onlays made from?
Inlays and onlays are most often made from porcelain or gold. Porcelain is tooth-colored and blends in with nearby teeth, while gold is very durable and has a long track record on back teeth.
Your dentist can talk through how each material looks, how much it costs, and how it suits the spot in your mouth where it will go.
Can tooth-colored fillings be used on back teeth?
Yes, tooth-colored composite resin fillings can be used on both front and back teeth. Courtside Dental uses composite resin for every filling because it matches your enamel and removes only a small amount of healthy tooth.
Composite also does not expand or contract with temperature the way metal amalgam can. For a cavity that is too large for a filling, a stronger restoration may be suggested.
Can I see what my restored tooth will look like before treatment?
Often, yes. Our Portage dentist can create a diagnostic wax-up, which is a physical model of a proposed restorative or cosmetic plan made from an impression of your teeth.
The model shows the expected shape and function before any work begins. It also helps the dentist judge how much space there is for a restoration and whether a treatment is the right fit.
Is it normal for a tooth to feel sensitive after a restoration?
Some mild sensitivity and gum soreness after a restoration is normal. Cleveland Clinic says these side effects usually fade within a week or two as the tooth settles.
A throbbing toothache or sharp pain when biting is different. Those signs can mean the bite needs an adjustment or the tooth needs more care, so call the office if they show up.
Schedule a Visit Today
If a back tooth is cracked, sore, or holding a large old filling, a quick exam can show which repair makes the most sense. Our dentist in Portage, MI can walk you through fillings, inlays, onlays, and crowns.
Call Courtside Dental today at (269) 327-1011 or request an appointment online.