Ask almost any denture wearer which they find more difficult — the upper or the lower — and the answer is almost always the lower. Here’s why lower dentures are inherently more challenging, and what options are available to improve stability.
Why Upper Dentures Are More Stable
An upper (maxillary) denture covers the roof of the mouth — the palate. This large surface area creates a suction effect that helps hold the denture in place. In combination with gravity pulling the denture down onto the gum, upper dentures generally stay put reasonably well.
Why Lower Dentures Are Harder
A lower (mandibular) denture doesn’t have a palate to grip. It sits on a horseshoe-shaped ridge of gum tissue, which provides much less surface area for retention. Gravity works against it — pulling the denture away from the gum rather than pressing it down. And the tongue, floor of the mouth and cheek muscles are constantly moving, all of which can dislodge the denture.
As bone resorption progresses over time — especially in the lower jaw, which tends to resorb faster — the ridge becomes flatter and the challenge increases.
What Can Be Done?
Precision Fit
A lower denture that fits precisely and uses every millimetre of available gum surface for retention will always perform better than a poorly-fitted one. This is where the skill and experience of the person making your dentures makes a real difference.
Implant-Retained Lower Dentures
The most effective solution for a persistently unstable lower denture is to anchor it onto dental implants. Just two implants in the lower jaw can transform stability dramatically — many patients describe it as life-changing. The denture clips onto the implants and stays firmly in place during eating and speaking.
We can discuss both options at a free consultation. Get in touch or call 01793 540128.
Typically just two implants in the lower jaw are sufficient to provide dramatically improved stability for a lower denture. More implants provide even greater retention.
A reline to restore the fit, ensuring precise extension of the denture base, and denture adhesive can all help. However, for significantly loose lower dentures, implants offer the most effective long-term solution.
The lower denture has less surface area to grip, is affected by tongue and muscle movement, and gravity pulls it away from the gum. The upper denture has the palate to grip and gravity helps press it down.
