Bone Resorption

Bone resorption (also called alveolar bone resorption) is the process by which the jawbone gradually shrinks after a tooth is lost. The bone that previously surrounded and supported the tooth root is no longer being stimulated by chewing forces, so the body stops maintaining it and it slowly disappears.

How fast does it happen?

Resorption begins within the first few weeks after tooth loss. Studies show that approximately 25% of bone width is lost within the first year, and this continues — though more slowly — over subsequent years. After several years, significant changes in jaw shape can occur.

Why it matters for implants

Implants need a minimum volume of bone to be successfully placed and integrated. Significant resorption may mean bone grafting is needed before implants can be considered. This is one reason early implant placement (soon after tooth loss) is often preferable — it preserves bone architecture and simplifies treatment.

Dentures accelerate resorption

Wearing dentures does not prevent bone resorption — it actually accelerates it by applying pressure to the bone surface. This is one reason denture-wearing patients often notice their dentures becoming loose over time and their facial appearance changing.

How implants help

Implants transmit chewing forces into the bone, mimicking a natural tooth root. This stimulates the bone and prevents further resorption — one of the key long-term advantages of implants over dentures and bridges.