Short implants
Also known as: Short dental implant, Reduced-length implant
A category of implant defined by reduced intrabony length, used where vertical bone height is limited; the 11th European Consensus Conference defines it as a designed intrabony length of 8 mm or less with a diameter of 3.75 mm or more.
Key facts
| Defining threshold | A designed intrabony length of 8 mm or less with a diameter of 3.75 mm or more; implants longer than 8 mm at the same diameter are termed standard (11th European Consensus Conference, Cologne, 2016)Verified spec[1] |
|---|---|
| Terminology | The threshold is not settled across the literature: a 2025 systematic review records that some studies classify a short implant as 8 mm or less and others as 10 mm or less, and treats that inconsistency as a limitation of the evidence baseVerified spec[2] |
| Typical use | Primarily used to avoid bone augmentation in the posterior maxilla and mandible of partially edentulous patients where vertical bone volume is limited by the maxillary sinus or the mandibular canal, provided ridge width allows a diameter of 3.75 mm or more; also used to support removable overdenturesVerified spec[1] |
| Clinical evidence | A 2025 systematic review reported survival of 91–98% for short implants against 92–99% for standard-length implants, with no statistically significant difference at three to five yearsClinical evidence |
| Limitations | The 2016 guideline records failure rates of up to 10% at three to five years where a short implant also has a reduced diameter, advises against machined-surface short implants, and notes that no data were then available for immediate loading of short implantsVerified spec[1] |
Overview
A short implant is one deliberately made stubby so that it can be placed where the bone above the nerve, or below the sinus, is shallow — the alternative usually being a graft to build height first. The single most important thing to know is that there is no universal definition: the European Consensus Conference sets the line at 8 mm or less with a diameter of at least 3.75 mm, while published reviews have variously used 10 mm, 8 mm or 7 mm, so two papers can disagree about survival simply because they are counting different implants. Comparative reviews to date have not found a significant survival difference against standard-length implants over three to five years, but follow-up beyond ten years remains thin. The same guideline is candid about where the risk sits: a short implant that is also narrow performs less well, and surface and prosthetic design matter more here than they do at normal lengths.
Sources
Numbers match the citations beside each claim above.
Clinical evidence
- [1]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.
- [2]Short versus standard-length implants: A systematic review on clinical outcomes and success rates — Bioinformation (PMC), 2025. Accessed 2026-07-21.