A back tooth is gone, nobody can see it, and you chew fine on the other side. So it stays that way. The problem is that the bone underneath does not simply wait.
- Jaw bone needs chewing force through a tooth root to maintain its volume. Once a tooth is gone, the bone there resorbs, fastest in the first year.
- Beyond bone loss, neighbouring teeth tip into the gap and the opposing tooth over-erupts, altering the bite.
- A long-missing tooth can usually still be replaced, but bone augmentation may be needed, adding time and cost.
- Services replacing missing teeth fall outside health insurance cover; treatment carried out beforehand is assessed under the usual rules.
The most common thing patients say about a tooth they lost: "It has been gone for years, I am used to it, no harm done." On the surface that is true. But the changes tooth loss sets off are slow and painless, which makes them hard to notice while they are happening.
The short answer
Jaw bone needs chewing force transmitted through a tooth root to maintain its volume. When a tooth is lost, the bone at that site stops receiving load and the body gradually reclaims what is not being used. This is normal biology, not a disease. The consequence is that the longer the gap remains, the less bone there is, and the more involved later restoration becomes.
Three changes that follow tooth loss
First, the alveolar bone resorbs. The process starts soon after the tooth is lost and is fastest in the first year, then slows but continues. The ridge at the site becomes lower and narrower over time.
Second, the remaining teeth move. Teeth next to the gap tend to tip into it, while the opposing tooth in the other jaw, with nothing to meet, over-erupts. The result is an altered bite, new spaces that trap food, and tilted teeth that are harder to clean and therefore more prone to decay and gum inflammation.
Third, chewing load shifts to the other side. Chewing on one side for years loads that group of teeth beyond what they were designed for, so they wear and crack more readily. Some people also notice jaw fatigue on the working side.
When several teeth are missing, reduced bony support around the lips and cheeks changes facial appearance. This is what people tend to notice last.
Can a long-missing tooth still be replaced?
In most cases yes, though the route may be longer than it would have been earlier. What changes with time is the conditions for treatment, not whether treatment is possible.
Take dental implants. An implant needs sufficient bone height and width to support it. Where enough bone remains, the implant can be placed directly. Where the bone has resorbed substantially, a bone augmentation step may be needed first, extending the treatment time and increasing the cost. In the upper back jaw, the sinus dropping lower over time is another factor the dentist must account for.
Bone is not the only consideration. The position and number of missing teeth, the condition of the remaining teeth, the state of the gums and periodontal tissue, and your general health all shape the right plan. There is therefore no universal answer, and an examination with x-rays is needed for your own situation.
Ways to replace missing teeth
Ky Hoa Dental provides the following groups of options, according to each person's situation:
- Dental implants. A fixture is placed in the jaw bone in place of the root, with the tooth portion attached on top. The advantages are that neighbouring teeth need not be reduced and chewing force is transmitted to the bone. The trade-offs are the need for suitable bone and general health, and a longer treatment time.
- Removable dentures. Partial where some teeth are missing, or complete for a full arch. Advantages are shorter treatment, lower cost, and suitability across a wider range of health situations. Trade-offs are an adjustment period and daily removal for cleaning.
- Implant-supported complete dentures. A combination of the two, using several implants as anchors so the denture is far more stable than a conventional removable one.
- Fixed restorations using dental crowns. Used in certain situations depending on the condition of the adjacent teeth.
The dentist will present the options that suit you, with the advantages, drawbacks and cost of each, so you can weigh them before deciding.
Cost and health insurance
This needs stating plainly so there are no surprises: services replacing missing teeth fall outside health insurance cover. Implants, crowns and removable dentures are all prosthetic work rather than treatment of a condition, so they are self-paid.
Conversely, treatment carried out beforehand, such as extracting a retained root, treating periodontal disease or scaling where prescribed as treatment, is assessed for health insurance cover in the same way as other dental conditions.
The Ky Hoa Dental price list states clearly which items fall within health insurance cover and which are self-paid. You are always quoted and asked to agree before treatment begins.
What to do now
If you are missing a tooth, whether recently or long ago, the first step is an examination to establish the current state of the bone and the remaining teeth. Knowing where you stand is what allows you to decide what to do and when, rather than continuing to wait without knowing what you are waiting for.
Ky Hoa Dental provides examinations and consultations at 266A - 268, Duong 3 Thang 2, Hoa Hung Ward, Ho Chi Minh City, Monday to Saturday. You can call our hotline for guidance before visiting.
Frequently asked questions
A back tooth is missing and nobody can see it. Does it need replacing?
Back teeth do most of the chewing, so losing one affects function more than appearance. The bone at that site still resorbs and the neighbouring teeth still drift, even though you cannot see it happening. It is worth an examination so the dentist can assess your case, rather than deciding on the basis of what is visible.
After how many years is an implant no longer possible?
There is no fixed cut-off. What matters is the volume and quality of bone remaining at the site, together with your general health, not the number of years since the tooth was lost. Some people who lost a tooth many years ago still have good bone; others lose bone quickly. An examination with x-rays is needed to know.
Are dental implants covered by health insurance?
No. Implants are prosthetic work and fall outside health insurance cover, so they are self-paid. Treatment carried out beforehand, such as extracting a retained root or treating periodontal disease, is assessed for cover under the usual rules.