A dental implant is a small screw-shaped post, almost always titanium, placed into the jawbone to take the place of a missing tooth root. It is not a false tooth in itself — it is the foundation. A separate crown is attached to it once the bone has grown onto the post and locked it in place.
That distinction explains most of what follows: why implant treatment takes months rather than weeks, why bone matters so much, and why an implant behaves differently from a bridge or a denture.
The three parts of an implant
What patients call “an implant” is usually three components that arrive at different stages.
The fixture
The post itself, placed into the bone. It is typically 6 to 16 millimetres long and 3 to 6 millimetres wide, threaded like a screw, and made of commercially pure titanium or a titanium alloy. Some systems use zirconia instead. Its surface is deliberately roughened at a microscopic level, because bone cells attach far better to a textured surface than a polished one.
The abutment
The connector that passes through the gum and joins the fixture to the crown. It is fitted after healing, and its shape helps form the gum contour around the finished tooth.
The crown
The part you see and chew with, made in a dental laboratory to match the colour, shape and translucency of your own teeth. It is either screwed into the abutment or cemented onto it.
Why titanium
Titanium is used because of a property it has that most metals do not: living bone will grow directly onto its surface and bond with it, rather than treating it as a foreign object to be walled off. This is called osseointegration, and it is the whole basis of implant dentistry. Without it, the post would simply sit in a hole and loosen under load.
Osseointegration is also why there is a waiting period between placing an implant and loading it with a crown. The bond forms over weeks, not days. Rushing it is the most reliable way to lose an implant.
What an implant replaces that a bridge or denture does not
Bone maintains itself in response to load. A natural tooth transmits chewing forces down through its root into the surrounding bone, and that stimulation keeps the bone there. When the tooth is lost, the stimulus disappears and the ridge of bone slowly resorbs — noticeably in the first year, and gradually thereafter.
A conventional bridge rests on the teeth either side of the gap and spans the space above the gum; a denture rests on top of the gum. Neither loads the bone where the tooth used to be. An implant does, which is why it is the only replacement that addresses the root as well as the crown. Our comparison of implants and bridges goes through the practical differences in detail.
What implants are used for
- A single missing tooth. One implant, one crown, no involvement of the neighbouring teeth.
- Several missing teeth. Two implants can carry a bridge of three or four units — one implant per tooth is not required.
- A whole arch. Four to six well-positioned implants can support a fixed bridge replacing every tooth, or retain a denture that clips into place instead of moving around. This is covered on our full-mouth implant page.
- Stabilising a loose lower denture, which is one of the most common and most appreciated uses of implants.
What an implant is not
It is worth being clear about the limits, because implants are often described as if they were simply better teeth.
An implant is not immune to problems. It cannot decay, because there is no living tissue in it to decay. But the gum and bone around it can become inflamed and recede — peri-implantitis — and that behaves aggressively once it starts. Plaque control and regular review are not optional.
An implant does not feel exactly like a tooth. A natural tooth is suspended in its socket by a periodontal ligament, which gives fine pressure sensation and a small amount of movement. An implant is fused directly to bone and has neither. Function is restored; the sensation is subtly different.
An implant is not a quick fix. The stages and the healing time are set by biology. Our article on the implant procedure, stage by stage sets out the full sequence.
An implant is not suitable for everyone, at every site, at every moment. Bone volume, gum health, certain medications and smoking all affect the prognosis, and in some cases preparatory treatment is needed first.
How long have implants been used?
Modern titanium implants have been in routine clinical use since the 1960s and 1970s, which means the profession now has decades of follow-up data rather than early impressions. The designs, surfaces and planning methods have changed considerably in that time — three-dimensional scanning in particular has made placement far more predictable — but the underlying principle has not.
How an implant is different from the tooth it replaces
Understanding the differences prevents both unrealistic expectations and unnecessary worry about normal sensations.
No periodontal ligament. A natural tooth is suspended in its socket by a thin layer of fibres with its own blood and nerve supply. That ligament gives fine pressure sensation, allows a fraction of a millimetre of movement under load, and absorbs shock. An implant is fused directly to bone and has none of it.
The practical consequences: an implant does not feel force in the same nuanced way, so you cannot judge how hard you are biting on it as precisely; it does not move at all, which is why it becomes a fixed point if you later have orthodontic treatment; and it transmits load straight into bone, which is why grinding matters more with implants than with teeth.
No decay, but no warning either. An implant cannot decay. It also cannot ache to tell you something is wrong. Bone loss around an implant is painless and is detected by probing and radiographs, not by symptoms.
A different soft-tissue seal. The gum attaches to an implant differently and less robustly than to a tooth, with a poorer blood supply. This is why inflammation around an implant tends to progress faster once it starts.
It does not erupt or drift. Natural teeth continue to move slowly throughout life. An implant stays exactly where it was placed, which over decades can mean the neighbouring teeth shift slightly around it.
What the first weeks feel like
Patients often expect to feel the implant itself and are surprised by how little sensation there is. Once healed, the crown feels like a tooth to the tongue and to eating, with the difference showing mainly in very fine pressure judgement and in biting into something unexpectedly hard.
The adaptation is quick — usually days rather than weeks — and most people stop noticing it entirely. Where an implant replaces a front tooth, the thing people notice longest is not the tooth but the gum contour around it, which continues to mature for some months after the crown is fitted.
Frequently asked questions
Will anyone be able to tell?
A well-made implant crown is difficult to distinguish from a natural tooth. The hardest cases aesthetically are front teeth, where the gum contour is visible and has to be built as carefully as the crown itself.
Does the metal show?
The fixture is entirely below the gum. Where the gum is thin, a faint grey shadow can sometimes show at the margin, which is one of the things assessed during planning.
Can an implant be removed?
Yes, if it fails or needs replacing, though the site usually then needs to heal and may need grafting before another attempt.
Is there an age limit?
There is no upper limit — health matters, not age. There is a lower one: implants do not move as the jaw grows, so they are normally deferred until growth is complete. Our article on implant candidacy covers this in full.
Find out whether an implant suits your case
Whether an implant is right for a particular gap depends on the bone and gum at that site, which can only be assessed with an examination and imaging. You can read more on our dental implants page or book an appointment.
To arrange a consultation at our clinic on Abbas El-Akkad in Nasr City, call +20 101 969 7597 or message us on WhatsApp.
