What are dental implants and how do they work?

The three parts of the system

A dental implant is not a single object. It is a small system with three parts that fit together, each doing a different job. Once you can picture the three, the whole idea becomes far less mysterious, and it helps when you are weighing up your options.

• The implant. A small titanium post, usually a few millimetres wide, placed into the jawbone where a tooth root used to be. It sits below the gum and is not visible once healed.
• The abutment. A connector that fixes onto the implant and passes through the gum. It is the join between what is inside the bone and what you see in the mouth.
• The crown. The tooth-shaped part on top, matched to the shape and colour of your other teeth. On larger cases this can be a bridge or a denture rather than a single crown.

Because the parts are separate, a worn crown can often be replaced years later without disturbing the post anchored in the bone. Our AHPRA registered dentists use this same three-part design for every case, whether it replaces one tooth or several. It is the standard approach for dental implants in Sunbury and across dentistry generally.

How the post fuses to bone

The reason an implant holds firm is a natural process called osseointegration. After the titanium post is placed, the surrounding bone grows onto and around its surface over the following weeks and months, gripping it much as roots grip a tree. Titanium is used because living bone bonds to it readily and the body tolerates it well.

This is why implants are not rushed. The post usually needs a healing period before the final crown goes on, so the bond can form properly. Once it has, the implant can carry the everyday forces of biting and chewing. Published long-term studies report implant survival of around 95% over ten years when they are well cared for, though every mouth is different and results depend on your own health and habits.

“I kept waiting for it to feel loose. It never did. I honestly forget which tooth it is.”

Why it stands on its own

The big difference between an implant and older ways of replacing teeth is that an implant replaces the root, not just the visible tooth. A traditional bridge leans on the teeth either side of a gap, and a plate denture rests on the gums. An implant is anchored in the jaw by itself, so healthy neighbouring teeth are left alone.

Replacing the root matters for another reason. Jawbone needs the stimulation of a tooth to keep its shape, and it tends to shrink where a tooth has been lost. Because an implant sits in the bone and takes chewing load, it helps keep that part of the jaw active. Our guide on how long implants tend to last goes further into what the evidence shows.

What an implant can replace

The same three-part system scales to fit what you need:

• One gap can be filled with a single tooth implant and a crown.
• Several missing teeth can be restored with an implant bridge held by two or more posts.
• A whole arch can be secured with a fixed full-arch restoration anchored on several implants.

Which option suits you depends on how many teeth are missing, the amount and quality of bone you have, and your general health. Placing an implant is a minor surgical procedure and carries risks such as infection, swelling or nerve involvement, so it always requires an individual assessment first. The step-by-step of how placement actually happens is covered on our implant procedure page.