When teeth are missing for a long time, the jawbone resorbs. Can implants still be placed? The role of grafting, sinus lifting and digital planning.
Why does the jawbone resorb?
A tooth transfers chewing load to the jawbone, and this load keeps the bone vital. When a tooth is removed or stays missing for a long time, the bone in that area is no longer stimulated and gradually loses volume. This is a natural process whose speed and extent vary from person to person.
In the posterior upper jaw there is an additional factor: the sinus cavities. With tooth loss the sinus floor can expand downward, reducing the bone height available for an implant. That is why implant assessment examines not only bone width but also height.
Which approaches are considered when bone is deficient?
The most common way to increase bone support is bone grafting (augmentation): graft material is added to the deficient area to create a suitable foundation for the implant. When height is insufficient in the posterior upper jaw, a sinus lift can raise the sinus floor in a controlled manner.
In a severely resorbed upper jaw, where grafting may be avoidable, approaches such as zygomatic implants anchored in the cheekbone can be considered. Which method is suitable is decided by evaluating bone quantity, bone quality and general health together.
The role of digital planning
Three-dimensional tomography (CBCT) allows detailed visualisation of bone volume and anatomical neighbours such as the sinus and nerves. The implant position is planned virtually on this data, and any grafting need is anticipated before treatment begins. The aim is a more predictable process.
Frequently Asked Questions
If my bone is limited, can an implant never be placed?
No. Bone deficiency can in many cases be addressed with grafting or sinus lifting. Whether treatment is possible can only be determined after examination and tomography.
How long is the wait after grafting?
Healing time varies by case and technique; in some situations the implant is placed in the same session, in others after a period. The timing is individual.
This content is for general information only and does not replace medical advice. As with any surgical or interventional procedure, results may vary from person to person. A clinical examination is required for an individual assessment.
