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Barunyoung Dental Clinic · 약수역 6번출구 바른영치과 · August 1, 2026
Hello. I am Kim Tae-young, the director of 바른영치과, a dental clinic near Yaksu Station.^^ When discussing full-mouth implants, there is one question that patients ask most often. "Do...
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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.
Clinic: Barunyoung Dental Clinic
Original post date: August 1, 2026
Translated at: August 17, 2026 at 12:28 PM
Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.
Hello.
I am Kim Tae-young, the director of 바른영치과, a dental clinic near Yaksu Station.^^
When discussing full-mouth implants, there is one question that patients ask most often.
"Doctor, how many implants do I need?"
"If I have lost all my teeth, do I need one implant for every tooth?"
This is something people planning full-mouth implants naturally wonder about.
To give you the conclusion first, full-mouth implant treatment does not involve placing one implant for every missing tooth.
The number of implants is determined by comprehensively considering the amount and condition of the jawbone, the locations where implants can be placed, the bite between the upper and lower teeth, chewing forces, teeth grinding or clenching habits, and the design of the final prosthesis.
Today, we will look at the differences associated with the number of implants placed when planning full-mouth implants near Yaksu Station, as well as the factors examined when determining the number of implants.
When one tooth is missing, one implant is generally placed to replace it.
However, the situation is different when several teeth are missing or all the teeth have been lost.
Rather than placing one implant at every tooth position, a full prosthesis can be made by placing several implants in appropriate locations and connecting the areas between the implants.
Therefore, losing 14 teeth does not mean that 14 implants are required.
What matters is not simply how many implants are placed, but where they are placed, where forces are applied, and how the final prosthesis is designed.
For full-mouth implants, various approaches are possible depending on the patient's oral condition and final prosthetic plan, including four, six, eight, or more implants.
| Number of implants | Circumstances generally considered |
|---|---|
| 4 or more | Considered under limited conditions, such as when there is insufficient bone or placement is difficult, or when the opposing bite forces are not strong |
| 6 or more | Considered one standard when planning a fixed full-arch prosthesis that does not restore the rearmost molars |
| 8 or more | Considered when restoring a wider range of teeth with sufficient jawbone and stable bite conditions |
However, four implants are not necessarily insufficient, and eight implants are not automatically better.
The appropriate number of implants may vary depending on the patient's jawbone condition and bite, chewing forces, the range of teeth to be restored, and the design of the final prosthesis.
During full-mouth implant consultations, there are cases in which surgery is difficult because there is not enough bone to place a sufficient number of implants. In such cases, depending on the circumstances, a method called All-on-X may be used, in which four to five implants are placed and then restored with a prosthesis, but this is not generally recommended.
In particular, supporting a prosthesis with four or five implants may be considered when there is insufficient jawbone and implant placement is difficult, or when the rearmost molars are not being restored.
It may also be included in the treatment plan when the opposing arch uses a denture or when the bite forces against the teeth are not strong.
However, the important point is not simply to reduce the number of implants.
It is necessary to check together whether four implants can achieve sufficient initial stability, whether their positions and spacing are appropriate, and whether the forces applied to the final prosthesis can be distributed reliably.
Therefore, rather than uniformly deciding that "four implants are enough," treatment should proceed based on the best diagnosis for the current situation. However, if there is sufficient bone, placing only four implants is not recommended for distributing bite forces.
Placing six or more implants for full-mouth treatment may be considered to support a fixed prosthesis covering a relatively broad area.
Especially when the rearmost molars do not necessarily need to be restored, six implants may be considered one standard for supporting a fixed full-arch prosthesis.
If the patient's bone condition and bite are suitable, approximately six implants may be planned when restoring the functionally necessary range of teeth while excluding the rearmost molars.
However, this does not apply equally to every patient.
The required number and positions of implants may vary depending on whether the rearmost teeth need to be restored, how strong the chewing forces are, and whether the patient grinds or clenches their teeth.
In some cases, particularly in the molar region, an implant may need to be placed at each tooth position.
Ultimately, what matters is not the number six itself, but where the implants are positioned and how the final prosthesis is designed.
In an actual patient, the rearmost molars were restored, but because the bone in the front-tooth area was insufficient, treatment was carried out in this manner by maximizing the distribution of implant angles and bite forces.
If there is sufficient jawbone, conditions are favorable for implant placement, and the bite is stable, placing eight or more implants to plan a full-arch prosthesis may also be considered.
As the number of implants increases, there are more points available to support the prosthesis, which may help distribute chewing forces among multiple implants.
In particular, if sufficient jawbone is available and a wider range of teeth—including the rearmost molars—needs to be restored, placing eight or more implants may be considered.
Sufficient bone is necessary, and each implant must be placed in an appropriate position. It is also important to fabricate a structure that the patient can manage easily over the long term with the implants and prosthesis.
Ultimately, it is important to place an appropriate number of implants in the necessary positions and create a prosthesis that can be used stably over the long term.
For this patient, the rearmost molars were excluded from the initial diagnosis because the bone in that area was not favorable at the time of surgery. However, because the patient was male and had a well-developed jaw, implants were placed at each tooth position in the molar area.
As these conditions differ from person to person—including oral conditions and habits—the appropriate diagnosis also differs for each individual.
When determining the number of implants for full-mouth treatment, the following factors are assessed comprehensively.
Sufficient bone is needed to support the implants stably.
The height, width, and quality of the bone are examined, and the positions where implants can be placed are determined.
When necessary, bone grafting may be performed first, or it may be performed at the same time as implant placement.
The number of implants is not the only important factor; their placement locations are also important.
Implant positions are planned by considering the positions and sizes of the teeth to be made and the direction of chewing forces.
Full-mouth implant treatment may involve treating only the upper or lower arch, but in some cases both arches are treated together.
The number and positions of implants and the form of the final prosthesis may vary depending on how the upper and lower teeth fit together.
If you regularly clench your teeth forcefully or grind your teeth severely during sleep, greater forces may be transferred to the implants and prosthesis.
In such cases, the bite must be designed more precisely, and the number and positions of implants must also be considered.
The number of implants is also closely related to the type of prosthesis that will ultimately be made.
The required number and positions of implants may vary depending on whether the rearmost molars will be restored and how far the fixed teeth will extend.
The upper and lower jaws differ in bone structure, bone quality, and anatomical characteristics.
In general, the upper jaw has a wider arch and softer bone, so it may require a similar or greater number of implants than the lower jaw.
In particular, because the upper jaw contains anatomical structures such as the maxillary sinus, it is important to check the amount of bone available for implant placement.
In the lower jaw, the location of the mandibular nerve canal and other factors must be considered.
Therefore, even for the same patient, the number of implants planned for the upper and lower jaws may differ.
For example, treatment may be planned with six implants in the upper jaw and four or six in the lower jaw. This depends on the patient's bone condition and bite, as well as the final prosthetic plan.
This is also a question I often receive in the clinic.
As long as the bone allows it, increasing the number of implants may help distribute bite forces. However, several circumstances must be considered in actual clinical treatment.
The diagnosis takes into account various situations, such as narrow spacing between teeth, cases in which bite forces are not strong and implants can be placed farther apart, and financial considerations.
Rather than placing implants unconditionally in the greatest or smallest possible number, our focus is on how long the patient can continue using them comfortably while maintaining them well.
Therefore, in full-mouth implant treatment, it is important to consider not only the number of implants but also how comfortably the patient can manage them in daily life.
When I provide full-mouth implant consultations, I believe it is important to consider not only "How many implants should be placed?" but also "How can the patient use them comfortably for a long time?"
Because several implants need to be placed for full-mouth treatment, an accurate diagnosis before surgery is important.
Using a 3D CT scan, the height and width of the jawbone, bone quality, and anatomical structures such as the nerve canal and maxillary sinus can be examined three-dimensionally—details that are difficult to confirm with a conventional X-ray.
It can also be useful for producing a guided-implant surgical guide.
In addition, it helps plan where to place the implants by taking into account the positions of the final prosthetic teeth.
Therefore, full-mouth implant treatment should begin not simply with the question, "How many implants should be placed?" It is important to first establish an overall treatment plan that considers the current jawbone, bite, chewing forces, and final prosthesis.
It is natural for people considering full-mouth implants to be interested in the number of implants.
However, no single number—four, six, or eight—can be considered the correct answer for every patient.
If the bone is insufficient and bite forces are not strong, four implants may be considered. If a fixed full-arch prosthesis is planned without restoring the rearmost molars, six implants may be considered one standard.
Conversely, if there is sufficient jawbone and stable bite conditions and a wider range of teeth needs to be restored, placing eight or more implants may be considered.
Ultimately, what matters is not placing as many implants as possible, but determining the appropriate number and positions for the patient's oral condition.
✔ Full-mouth implant treatment does not involve placing one implant for every tooth.
✔ Various treatment plans are possible, including four, six, or eight or more implants.
✔ Four implants may be considered under limited conditions, such as insufficient bone in the molar area or relatively weak bite forces.
✔ Six implants may be considered one standard when planning a fixed full-arch prosthesis that does not restore the rearmost molars.
✔ When there is sufficient bone and stable bite conditions, placing eight or more implants may be considered.
✔ A greater number of implants is not automatically better.
✔ The amount and location of the jawbone, bite, chewing forces, and teeth-grinding habits must be considered together.
✔ The form of the final prosthesis and the patient's ability to maintain it over the long term are also important considerations.
✔ It is important to determine the number of implants appropriate for each individual based on a precise diagnosis using tools such as 3D CT.
If you are planning full-mouth implants and find yourself wondering, "How many implants should I have placed?" it is better not to compare implant numbers alone. You should also consider where and how the implants will be placed given the condition of your jawbone, and what type of final prosthesis will be made.
At 바른영치과, a dental clinic near Yaksu Station, we establish treatment plans after comprehensively examining each patient's oral condition, bite, and jawbone condition based on detailed examinations, including 3D CT.
If you need full-mouth implants and are wondering how many implants are necessary, we recommend first having your current oral condition examined accurately.
Whether four, six, or eight implants are appropriate depends on the patient's bone condition and bite, as well as the final prosthetic plan. Please confirm the precise number of implants and treatment method through a detailed diagnosis.
This was 바른영치과, a dental clinic near Yaksu Station.^^
We believe that proper treatment leads to proper results.
We will always do our best so that everyone who visits us can return home feeling more comfortable.
바른영치과
This post was written for the purpose of providing medical information in compliance with Article 56, Paragraph 1 of the Medical Service Act. The applicability of each treatment and the treatment process may vary depending on the individual's oral condition, and the treatment plan will be determined after sufficient diagnosis and consultation.
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