What is a dental implant, and how does it work?

The three parts of an implant restoration

What we call "a dental implant" in everyday speech is actually a three-part assembly:

1. The implant fixture. A small screw-shaped device — typically 8 to 14 mm long and 3 to 5 mm in diameter — placed surgically into the jawbone. The most common material is medical-grade titanium; zirconia (a ceramic) implants are an alternative used in some cases. The fixture is the part that integrates with bone.
2. The abutment. A connector piece that screws into the top of the fixture and emerges through the gum. It is the link between the buried implant and whatever visible restoration sits on top.
3. The restoration. The crown, bridge, or denture attachment that the patient sees and uses. The restoration is made by a dental laboratory from an impression or digital scan and is fitted by your general dentist or prosthodontist.

In a single-tooth case, the patient experiences this as one missing tooth being replaced by one visible new tooth — but the work behind it is the assembly of all three components.

How osseointegration works

The concept of osseointegration originated in the early 1950s with Per-Ingvar Brånemark, a Swedish physician and researcher who observed — while studying bone healing and microcirculation in rabbits — that titanium optical chambers fixed into bone could not be removed afterwards, because the bone had grown into intimate contact with the titanium surface. His later experimental and clinical work in the 1960s translated this incidental observation into a reproducible surgical technique that became the foundation of modern implant dentistry (Brånemark et al., 1969).¹

In a healthy patient, after a titanium implant is placed in the jawbone:

• Days 1–14: a blood clot forms around the implant; early bone-forming cells (osteoblasts) migrate to the implant surface.
• Weeks 2–8: new woven bone forms in direct contact with the implant surface. The implant becomes mechanically stable.
• Months 2–6: the woven bone remodels into mature lamellar bone. The connection between bone and implant becomes biological and durable — osseointegration is complete.

During this period the patient typically wears a temporary tooth replacement so the gap is not visible, particularly for front-tooth sites. Routine eating is possible on the other side of the mouth from the early days; the surgical site itself needs gentleness for the first weeks.

The 3-to-6-month figure is the historical norm. Some modern protocols load the implant earlier under specific conditions ("immediate loading"), and some sites take longer if bone quality is poor or if bone grafting was required. The right timeline is decided per case.

What it feels like

Once the restoration is fitted, most patients describe an implant as feeling "almost the same as my own tooth". The differences are subtle:

• Sensitivity — implants do not have nerves the way teeth do. They do not register cold or sharp pain the way a natural tooth does, which means a damaged or infected implant can be less symptomatic than a damaged tooth.
• Mobility — implants do not have the periodontal ligament's slight cushioning. They are rigidly fused to bone, so they do not "move" the way a natural tooth does during chewing.
• Cleaning — implants need a slightly different cleaning routine, particularly around the gum margin where peri-implantitis can develop. We send you home with specific instructions.

What an implant is not

Three common misconceptions worth clearing up:

• An implant is not "permanent" in the sense of "no maintenance required". Pooled 10-year survival is about 94.6% in long-term studies (Moraschini et al., 2015), but those figures reflect populations of patients in structured follow-up.³ Implants need cleaning, regular review, and sometimes intervention if peri-implantitis develops.²
• An implant is not a quick fix. From planning to final restoration, four to nine months is typical for a single straightforward case. Full-arch reconstructions can take longer.
• An implant is not always the only option. A traditional bridge (using the adjacent teeth as anchors) or a partial denture can be appropriate alternatives for some patients. The right choice depends on the site, the adjacent teeth, the bone, the patient's medical history, and the patient's preferences. A specialist consultation discusses all the options.

This article is general educational content. Whether a dental implant is the right replacement for your missing tooth depends on a clinical examination by a registered specialist and (usually) a CBCT scan to assess bone volume and density.