The rubber dam: what it is, when it is used and why it makes a difference
Few tools in dentistry look so simple yet matter so much to the result as the rubber dam. And yet many patients have never heard of it — or, if they have, they associate it with a needless nuisance. The reality is very different.
What it is
A thin elastic sheet of latex or silicone (for patients with allergies) placed around the tooth being treated, isolating it completely from saliva, tongue, lips and the rest of the mouth. It is held in place by a small metal clamp and a rigid frame.
When it is used
It is mandatory in endodontics: the sodium hypochlorite and EDTA used to irrigate the canals must not come into contact with the soft tissues. Without a dam, it is almost impossible to stop bacteria in the saliva from contaminating the very canals you are trying to disinfect.
At Studio Verri the dam is also used routinely when removing old amalgam fillings, placing composite restorations, cementing inlays and in any situation where moisture control is critical.
Why it makes a difference
Composites and adhesive cements are hydrophobic materials: they only work in a dry field. Even minimal saliva contamination compromises the bond, reducing the longevity of the restoration in a way that is invisible at first but significant over time. Several clinical studies confirm that restorations placed with a dam last longer: less contamination, better adhesion, less marginal leakage and a dramatic reduction in recurrent decay.
The dam also offers a safety benefit: it prevents the accidental swallowing or inhalation of irrigants, small instruments or fragments of tooth.
The patient experience
Many patients dread it before trying it, and are surprised by how tolerable it is — often more comfortable than the alternative, because it removes the need to control every movement of the tongue and cheeks. Placing it takes less than a minute.
At Studio Verri the rubber dam is not an optional extra: it is an integral part of our quality protocol, because doing things well the first time is always the best value for the patient.