Why do front teeth spread apart when a molar is lost?
Because the front teeth take on the chewing force the molar used to handle. Molars support the force of crushing and chewing food, while front teeth bite through food, help with pronunciation, and guide where the lower jaw closes. When the back is empty, that force and guidance shift forward.
Among people who come to the clinic saying, “My front teeth suddenly spread apart,” there are quite a few cases where the cause is not the front teeth but a missing molar. As time passes after losing a molar, changes like these follow.
- The neighboring teeth tilt toward the empty space.
- The opposing tooth grows out toward the empty space.
- The front teeth are pushed forward or sideways, gaps form, and the edges wear down or chip.
- A habit of chewing on only one side develops, putting strain on the teeth and jaw on the other side.
Can't I just fix the front teeth first?
If the back is empty, front-tooth treatment is hard to make last. Even if Brinate or front tooth crowns are placed, the force those restorations take differs from the plan, so they spread apart again or chip. That's why, rather than the shape of the front teeth, I also look at whether there are teeth in the back and whether the gums and bone can hold up.
When chewing on one side, grinding, and a long period with a missing tooth overlap, the front teeth wear faster. If the tooth has been missing for a long time, the alveolar bone (the bone that supports the teeth) has already shrunk, and then bone and gums come before the screw. Methods for closing the gap between front teeth itself are summarized separately in treatment options for gaps between front teeth.
Should a missing molar be replaced with a bridge or an implant?
The condition of the bone, gums, and neighboring teeth decides it. I don't push one option.
| Category | Bridge | Implant |
|---|---|---|
| Method | Prepare the teeth on both sides of the gap and connect them as one piece | Place an artificial root in the gap and a restoration on top |
| Neighboring teeth | Healthy teeth are prepared | Not prepared |
| Time | Relatively short | Usually 2–6 months to bond to the bone; longer with a bone graft |
| Aftercare | The area under the connection must be cleaned separately | Ongoing care of the gums around the implant |
If there isn't enough bone, a bone graft or sinus lift (surgery to raise the bone height in the upper molar area) comes first. When items like these are added, their names and amounts should be listed separately on the fee table.
How is a front tooth implant different from a molar implant?
The principle is the same, but it's more demanding. Front teeth show the gum line when you smile, so if the placement position is off by just 1mm, the gum shape and color look unnatural. That's why front tooth implants are planned separately. If only the front tooth is built up while the molar is put off, force from the back pushes that front tooth again.
How we do it at Wonjin Dental
If there is a missing molar, we first look at the height and width of the bone with panoramic and three-dimensional (CT) imaging. Then I explain which of a molar implant or a bridge suits the bone and gums, and the front teeth are planned in order after that. We use Osstem SA, BA, and SOI implants, and implants covered by Korean National Health Insurance are also available. Amounts for each item are on the full fee list.
Looking only at the front teeth won't protect the front teeth. If your front teeth have started to spread apart, first check that the back isn't empty.
Frequently asked questions
Is it OK to leave one missing molar as it is?
Even if it's not very uncomfortable right now, leaving it for a long time lets the neighboring teeth tilt and the opposing tooth come down, so the space shrinks. When you later try to fill it, orthodontics or a bone graft may be needed first, so it's better to have it checked early.
If the molar is replaced, will the spread front teeth close again?
In many cases they don't close on their own. We first fill the back to stabilize the force, then deal with the remaining gap separately with partial orthodontics, composite resin, or porcelain veneers.
Are there other causes of gaps between the front teeth?
Yes. Periodontitis can shrink the jawbone so the teeth loosen and spread, and a habit of pushing the front teeth with the tongue or grinding can also be the cause. The order of treatment differs by cause.
If I'm 65 or older, are implants covered by insurance?
For people aged 65 and older, up to 2 implants in a lifetime are covered by Korean National Health Insurance, with a 30% copayment. We confirm the eligibility conditions at your appointment.
