Mr Andrzej, aged 64, has worn a lower complete denture for several years. He complains of the same thing as many patients in a similar situation: the denture “moves about” while eating, lifts when biting into harder morsels, and can loosen during conversation. During the consultation, a question we hear regularly comes up: “Can this be stabilised somehow, so that I can eat normally?”. One of the answers to that question is precisely the implant-supported denture, also known as an overdenture (a denture supported and retained by implants).
This article explains what an implant-supported overdenture is, how its attachment works, who it is a good solution for and who it suits less well – as well as what can realistically be expected from it in everyday use. It is a method with specific indications, not a universal answer to every missing tooth.
What is an implant-supported overdenture
An implant-supported overdenture is a removable denture that the patient takes out and puts back in themselves, but which – unlike a conventional complete denture – does not rest solely on the gum and the underlying bone. Instead, it is connected to implants placed in the bone by means of special attachments. This connection means that the denture holds far more securely, moves less and gives a greater sense of control while chewing and speaking.
The most frequently described and best-researched variant is an overdenture on two implants in the mandible (the lower jaw). It is in the lower arch that conventional complete dentures cause the most trouble – they lack the support that the palate provides in the upper jaw, so they loosen easily. Two implants in the anterior segment of the mandible can transform this situation. In the upper jaw the conditions are often different, and a larger number of implants is more often considered, because the bone and the way the denture is supported differ from the mandible.
It is worth distinguishing straight away between two concepts that are sometimes confused. An implant- supported overdenture is still a removable denture – the patient takes it out for cleaning. This is different from a fixed restoration on implants (e.g. a permanently screwed-in bridge), which the patient does not remove. The overdenture therefore sits in between: it offers a large part of the comfort of fixed solutions while remaining a simpler and usually less expensive option.
How the attachment works: retention and types of attachment
At the heart of the overdenture is the attachment system, that is, the elements that connect the denture to the implants and are responsible for holding it in place (technically we call this retention – the force with which the denture stays in position). In practice, two main approaches are used.
The first is snap-fit attachments, most often of the locator type (a retentive element connecting the denture to a single implant, working on a snap-fastening principle). Each implant has its own independent attachment, and the denture holds matching replaceable inserts. This solution is relatively simple, and the replaceable inserts make it possible to adjust the retention force.
The second approach is the bar (a metal structure connecting the implants, onto which the denture is seated). Here the implants are joined by a common element, and the denture “sits” on the bar and snaps onto it. The bar distributes loads evenly between the implants and often provides very secure retention, but it is a more technically complex solution and harder to keep clean.
Both systems require servicing over time: the retentive elements wear out with the daily removal and insertion of the denture, so they are replaced periodically. More on this in the section on everyday use.
Table: locators versus bar
| Criterion | Locators (single attachments) | Bar |
|---|---|---|
| Retention (holding) | Good, adjustable with inserts; dependent on the parallelism of the implants | Usually very secure; load distributed between the implants |
| Hygiene and cleaning | Easier – fewer places where plaque collects | Harder – plaque builds up more easily under and around the bar |
| Servicing and replacement of components | Simple replacement of retentive inserts | More complex; replacement of matrices and inspection of the bar |
| Complexity and approximate cost | Simpler and usually cheaper | More complex and usually more expensive |
The choice between locators and a bar is not a matter of “better or worse”. Reviews comparing different attachment systems in mandibular overdentures show that a bar usually provides the most secure retention, whereas single attachments (locators, ball attachments, telescopic attachments) tend to be simpler to maintain and are associated with a favourable profile of complications and of the condition of the tissues around the implants — although differences in marginal bone loss between systems are often not statistically significant, and no attachment is universally the best. The results of such comparisons depend, however, on the specific combination of attachments and on whether they concern the mandible or the maxilla, so they do not transfer directly to every pair of solutions. This clearly shows that the decision depends on the specific situation: the amount and arrangement of bone, the patient’s hygiene, their expectations and the servicing possibilities. The final choice of attachment type rests with the clinician after assessing the conditions in the mouth.
What treatment involves and whether it hurts
Many people put off the decision for fear of pain. It is therefore worth calmly explaining how treatment proceeds. It begins with placing the implants in the bone – the procedure is carried out under local anaesthesia, so during it the patient feels no pain, only pressure or vibration. For a few days after the procedure there may be swelling and discomfort in the area of the wound, usually mild and resolving on its own.
Next, time is needed for the implants to fuse with the bone – usually several months. During this period most patients can continue to use their existing denture or a temporary denture, which means there is no need to be left “without teeth”. Only after healing are the attachments fixed to the implants and the definitive overdenture fitted. The exact course and schedule depend on the individual situation and on whether additional procedures are required.
Implant-supported denture – who is it a good solution for
The overdenture works best for several groups of patients. The first is edentulism of the mandible – when there are no natural teeth left in the lower arch and a conventional complete denture does not hold sufficiently. Adding two implants and attachments can markedly improve stability in such a situation.
The second group is people with a limited budget, for whom a fixed restoration on a larger number of implants is out of reach. An overdenture on two implants is usually a cheaper solution than a fixed restoration on many implants, while at the same time offering a significant leap in comfort compared with an ordinary denture. It is a genuine compromise between price and quality of life.
The third group is patients in whom the anatomical conditions – for example the amount of available bone – do not allow a fixed bridge on implants without extensive procedures, or who do not wish to undergo such procedures. Two implants for an overdenture require less bone than an extensive fixed restoration.
The list below is intended as a guide and does not replace a diagnosis, but it helps to make an initial assessment of whether this solution is worth considering during a consultation. An overdenture may be a good choice when: your lower complete denture does not hold and makes eating difficult; you want markedly more secure chewing, but a fixed restoration on many implants exceeds your budget; you want a restoration that is more stable than an ordinary denture, accepting that it is still taken out for cleaning; you are able to look after daily hygiene around the attachments, or have support in doing so. The solution is, on the other hand, worth reconsidering when you want a restoration that is not removed at all, or when maintaining hygiene would be very difficult for you without help.
What does the research say about this? Studies on overdentures on two implants in the mandible consistently show a high level of patient satisfaction and a marked improvement in chewing comfort compared with a conventional complete denture. Put simply: most people with an overdenture on two implants chew more securely and feel more at ease than with a denture resting solely on the gum. Similarly, reviews devoted to implant-supported overdentures indicate that, compared with a conventional denture, they improve oral-health-related quality of life. It must be added honestly, however, that some of this evidence comes from studies with a limited number of participants, a short follow-up period and varied methodology, so we treat it as strong but not definitive guidance.
There is one more argument worth knowing. After the loss of a tooth, the bone that surrounded it gradually disappears – this phenomenon is called resorption of the alveolar ridge bone (loss of bone tissue after tooth loss). A conventional denture resting on the gum does not halt this process. An implant, by transferring chewing loads to the bone, helps to limit its loss at the site where it is located. This is an established mechanism, although it should not be understood as a guarantee of preserving all the bone – it is a matter of local protection around the implants.
Who an overdenture may not be optimal for
It is also essential to point out situations in which an overdenture is not the best choice. People expecting a solution that does not need to be removed at all and that most closely resembles natural teeth may be more satisfied with a fixed restoration on implants – if conditions and budget allow. An overdenture remains a removable denture, which is taken out for cleaning.
Caution is also needed with patients who find it difficult to maintain careful hygiene around the implants without support – because, as we explain further on, hygiene is a condition of success here. The decision also always depends on the patient’s general condition and on the assessment of local conditions; certain illnesses and medications taken affect the planning of implant treatment and require an individual approach.
What to expect from an overdenture
Realistic expectations are the basis of satisfaction with treatment. Here is what is worth knowing before making a decision.
In the first weeks after the denture is fitted, time is needed for adaptation. The way you bite, your speech and the sensation of the “new” hold all take some getting used to – in most patients this period passes within a few weeks.
The retentive elements need to be replaced periodically. The inserts in locators or the matrices on a bar wear out with use and are replaced as planned during check-up visits. This is a predictable maintenance cost, not a sign that “something has broken”.
Hygiene is a daily obligation. The denture and the areas around the attachments are cleaned carefully every day, and the implants themselves require care of the tissues around them. Neglecting hygiene favours the development of peri-implantitis (inflammation of the tissues around the implant combined with progressive loss of the bone supporting the implant) – a serious complication that can lead to loss of the bone supporting the implant and, in extreme cases, to loss of the implant itself.
Check-up visits are essential. Regular check-ups make it possible to detect inflammation early, assess the condition of the attachments and replace worn components. Contemporary guidelines on the prevention of diseases around implants clearly emphasise that care of implants does not end on the day the work is delivered – it is a programme of regular maintenance and monitoring spread over years. Keeping implants healthy is a shared task of the patient and the team, and the decision on the frequency of visits depends on the individual situation.
An overdenture is a solution designed to last many years. Studies on implant-supported dentures based on two implants in the mandible show that the implants themselves remain in the bone in the vast majority of patients, and that the denture stays functional for a long time with appropriate care. This does not mean, however, that once made, the restoration works without any attention: the retentive elements are wearing parts that are replaced as planned, and the denture itself may over time require relining or renewal. The durability of treatment therefore depends not only on the quality of the work but also on daily hygiene and regular check-ups.
In our dental practice at Modern Dental & Orthodontics (Klinika MDO) we observe that patients who understand the role of hygiene and check-ups from the outset go through treatment more calmly and experience complications less often. This is no coincidence – the good results of an overdenture are largely the outcome of consistent care.
Frequently asked questions
How many implants are needed for an overdenture?
In the mandible, two implants are most often used, and this is the best-researched solution. Sometimes more are used, especially in the upper jaw, where conditions can be more difficult. The final number depends on the amount of bone, the type of attachment and expectations, and the decision is made by the clinician after assessing the local conditions.
Can an implant-supported denture be removed?
Yes. An overdenture is a removable denture – the patient takes it out and puts it back themselves, primarily in order to clean the denture and the areas around the attachments thoroughly. This distinguishes it from a fixed restoration on implants, which is not removed. Being removable makes daily hygiene easier.
Which is better: locators or a bar?
Neither solution is always better. Locators are simpler and easier to keep clean; a bar often gives very secure retention at the cost of more difficult hygiene. The choice depends on the arrangement of the implants, hygiene and the patient’s expectations. The final decision rests with the clinician after assessing the individual situation.
How long does treatment take?
The time depends on whether additional procedures are needed and how healing progresses after the implants are placed. Usually several months pass between placement and delivery of the denture on its attachments, allowed for the implants to fuse with the bone. The exact schedule is set individually after assessing the conditions.
How do you care for an implant-supported denture?
The denture is cleaned daily outside the mouth, and the areas around the attachments and implants are cleaned carefully according to the team’s instructions. Regular check-up visits are also necessary, during which the condition of the tissues is assessed and worn retentive inserts are replaced. Good hygiene is the most important condition for the durability of treatment.
Who is an implant-supported denture for?
Most often for people with edentulism of the mandible in whom a conventional denture does not hold, for patients with a limited budget looking for a stable solution, and for those in whom conditions do not allow an extensive fixed restoration. It is not, however, a choice for everyone — the individual assessment decides.
Is an overdenture cheaper than a fixed restoration on implants?
Usually yes. An overdenture on two implants is most often a cheaper solution than a fixed restoration on a larger number of implants, while at the same time markedly improving comfort compared with an ordinary denture. This is one of the reasons why it is sometimes regarded as a sensible compromise between price and stability.
What should you do if the denture loosens or an insert falls out?
It is best to contact the practice and arrange a check-up – loosening usually means a worn retentive insert, which is replaced, rather than a serious failure. Do not try to repair or glue components back yourself, as you may damage the denture or the attachment. Use the denture carefully until your appointment.
How long does an implant-supported denture last?
With good hygiene and regular check-ups, an overdenture is a long-lasting solution – the implants remain in the bone in the vast majority of patients. You should, however, allow for planned servicing: the retentive inserts are wearing parts, and the denture itself may over time require relining or renewal.
Summary
An implant-supported denture, that is, an overdenture, is an intermediate solution between a conventional complete denture and a fixed restoration on implants. The best-documented variant – an overdenture on two implants in the mandible – allows most patients to chew more securely and feel more at ease than with a denture resting solely on the gum, and at the same time helps to limit bone loss locally around the implants. The choice between locator-type attachments and a bar depends on the local conditions, hygiene and expectations, rather than on a simple “better–worse” ranking. The key to a lasting result is realistic expectations, daily hygiene and regular check-ups. The final decision as to whether an overdenture is the right path, and in which variant, always depends on an individual diagnosis made at the practice.
Read more:
- Prosthodontics https://klinikamdo.pl/en/offer/prosthetics-warsaw/
- Dental Implants https://klinikamdo.pl/en/offer/implantology/
- Overlay and Onlay — When Instead of a Crown, When Instead of a Filling? https://klinikamdo.pl/en/blog/overlay-onlay/
- Dental implant vs bridge — which is better? https://klinikamdo.pl/en/blog/dental-implant-vs-bridge/
- How Long Does All-on-4 Last? Durability, Reviews and Other Important Information https://klinikamdo.pl/en/blog/how-long-does-all-on-4-last/
- First 72 hours after an implant - home care protocol https://klinikamdo.pl/en/blog/72-hours-after-an- implant/
- Price list https://klinikamdo.pl/en/treatment-fees/
Content and liability disclaimer
This article is informational and educational in nature and does not constitute medical advice, a diagnosis or a therapeutic recommendation — it does not replace a consultation with a specialist. If you are experiencing symptoms, have doubts or are facing a decision about treatment, consult a dentist. The methods described and the data cited are general in nature. The results of scientific studies relate to populations, not to an individual patient. The course and outcome of therapy depend on the individual clinical situation and may vary between patients. No information contained in this article constitutes a guarantee of result. The content has been prepared with due care, based on publicly available medical knowledge and the scientific publications indicated in the Sources section. We do not advise taking or refraining from any health-related action solely on the basis of the content of this article, without prior consultation with a doctor.
Sources
Source 1
Links https://doi.org/10.1111/clr.13668 │ https://pubmed.ncbi.nlm.nih.gov/32965052/
Description Srinivasan M, Schimmel M, Buser R, i wsp. „Mandibular two-implant overdentures with CAD-CAM milled bars with distal extensions or retentive anchors: A randomized controlled trial.” Clin Oral Implants Res. 2020;31(12):1207-1222.
Source 2
Links https://doi.org/10.1111/cid.13027 │ https://pubmed.ncbi.nlm.nih.gov/34268866/
Description Van de Winkel T, Heijens L, Listl S, Meijer G. „What is the evidence on the added value of implant-supported overdentures? A review.” Clin Implant Dent Relat Res. 2021;23(4):644-656. (Wartość dodana i jakość życia protez nakładkowych vs proteza konwencjonalna.)
Source 3
Links https://doi.org/10.1016/j.prosdent.2025.05.036 │ https://pubmed.ncbi.nlm.nih.gov/40592693/
Description Ibrahim WI, Abdeen RM, Denewar MM, Kortam SA. „Retention of telescopic versus LOCATOR attachments and marginal bone loss surrounding implant-retained maxillary overdentures: A 2-year randomized clinical trial.” J Prosthet Dent. 2025;135(4):778-786.
Source 4
Links https://doi.org/10.4103/jips.jips_158_21 │ https://pubmed.ncbi.nlm.nih.gov/34810359/
Description Sutariya PV, Shah HM, Patel SD, i wsp. „Mandibular implant-supported overdenture: A systematic review and meta-analysis for optimum selection of attachment system.” J Indian Prosthodont Soc. 2021;21(4):319-327. (Dobór zaczepów w żuchwie; belka — najlepsza retencja, brak istotnych różnic w utracie kości między systemami.)
Source 5
Links https://pubmed.ncbi.nlm.nih.gov/20305848/
Description Ma S, Payne AGT. „Marginal bone loss with mandibular two-implant overdentures using different loading protocols: a systematic literature review.” Int J Prosthodont. 2010;23(2):117-126. (Wysokie odsetki przetrwania implantów podpierających overdenture w żuchwie.)
Source 6
Links https://doi.org/10.4103/jips.jips_393_19 │ https://pubmed.ncbi.nlm.nih.gov/32655220/
Description Roy S, Maji S, Paul R, i wsp. „A comparison of cost and cost-effectiveness analysis of two-implant-retained overdentures versus other removable prosthodontic treatment options for edentulous mandible: A systematic review.” J Indian Prosthodont Soc. 2020;20(2):162-170. (Koszty i efektywność kosztowa vs proteza konwencjonalna.)
Source 7
Links https://doi.org/10.1111/jcpe.13823 │ https://pubmed.ncbi.nlm.nih.gov/37271498/
Description Herrera D, Berglundh T, Schwarz F, i wsp. „Prevention and treatment of peri-implant diseases — The EFP S3 level clinical practice guideline.” J Clin Periodontol. 2023;50 Suppl 26:4-76. (Wytyczna EFP — źródło tła, nieliczone do reżimu 80%.)