Mini implants
Also known as: Mini dental implant, MDI, Small-diameter implant
Very narrow implants, usually supplied as a single piece, used most often to retain a removable denture where a standard-diameter implant will not fit.
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Key facts
| Defining threshold | Sources conflict(The ITI narrow-diameter classification and StatPearls place mini-implants below 3.0 mm, while the 2016 European Consensus Conference guideline sets the boundary at less than 2.7 mm) |
|---|---|
| Classification | Category 1 of the narrow-diameter classification: one-piece implants of less than 3.0 mm, described as mini-implantsVerified spec[1] |
| Body geometry | Described as one-piece devices with a ball-shaped head for denture stabilisation or a square prosthetic head for fixed applicationsVerified spec[3] |
| Typical use | Listed indications include overdenture retention where standard implant placement is not feasible, replacement of teeth in narrow ridges, and orthodontic anchorageVerified spec[3] |
| Clinical evidence | In the narrow-diameter systematic review, implants below 3.0 mm were documented only for the edentulous arch and for non-load-bearing single-tooth regionsClinical evidence |
| Limitations | The 2016 European Consensus Conference guideline states that mini-implants have an increased risk of implant loss and that short mini-implants should be avoided; StatPearls notes limited scientific evidence on long-term survival and an absence of current guidelinesVerified spec[2][3] |
Overview
Mini implants are the narrowest fixtures on the market, made in one piece and used most often as a set of anchors under a lower denture that will not stay put. They are attractive because they are quick, less invasive and cheaper than conventional implants — but the category itself is not defined consistently, with the ITI classification drawing the line below 3.0 mm and the European Consensus Conference at 2.7 mm, so two sources can describe the same implant differently. Documented use is mainly denture retention and non-load-bearing single-tooth sites; the evidence for carrying chewing load at the back of the mouth is not comparable to that for standard implants. The same guideline that describes their indications also records an increased risk of loss and advises against the shortest versions, which is the balance a patient should be given rather than the price alone.
Sources
Numbers match the citations beside each claim above.
Clinical evidence
- [1]Narrow-Diameter Implants — ITI Consensus Statement — International Team for Implantology (ITI), 2014. Accessed 2026-07-21.
- [2]Guidelines: Update on short, angulated and diameter-reduced implants — 11th European Consensus Conference (EuCC), Cologne — European Association of Dental Implantologists (BDIZ EDI), 2016. Accessed 2026-07-21.
Additional references
- [3]Dental Mini-Implants (StatPearls) — StatPearls Publishing / NCBI Bookshelf, 2023. Accessed 2026-07-21.