Rubber Dam and Why Should Every Dentist Be Using It?

Rubber dam has been around since 1864. It's taught in dental school. It's endorsed by every major restorative society. And yet in many UK practices, it sits in a drawer — used for root canal treatment and rarely for anything else.

That's a significant missed opportunity, both clinically and commercially. In practices that use rubber dam routinely, outcomes are measurably better: adhesive bonds are stronger, composite placements are drier, ceramic cementation is cleaner, and the working field is quieter and more controlled. Patients notice the difference in the result, even if they don't know why.

This article is for dentists who know they should be using rubber dam more but haven't yet made it a habit — and for those who are genuinely curious about whether the evidence stacks up. Spoiler: it does.

"Rubber dam is not an optional extra in restorative dentistry. It is the foundation on which predictable, durable, high-quality work is built." — Dr Ian Cline

What Exactly Is Rubber Dam?

Rubber dam (also called dental dam) is a thin sheet of latex or non-latex material stretched across a metal or plastic frame to isolate one or more teeth during dental treatment. Holes are punched into the sheet corresponding to the teeth being treated, and the dam is secured around each tooth using specialised clamps.

The result is a clean, dry, isolated working field — completely separated from saliva, blood, crevicular fluid, tongue, cheek and lips. The dentist works in a controlled environment rather than constantly fighting contamination.

The technique was introduced by Sanford Christie Barnum in New York in 1864 and has been a cornerstone of restorative and endodontic dentistry ever since. In many countries — particularly in Scandinavia and parts of central Europe — its use in routine restorative work is near-universal. In the UK, rates are considerably lower, particularly outside specialist practice.

The Clinical Case for Rubber Dam

The benefits of rubber dam are well-documented in the literature, but it's worth setting them out plainly because they are genuinely significant.

1. Moisture Control and Adhesive Bond Strength

Virtually all modern restorative materials — composite, glass ionomer, ceramic cements — are sensitive to moisture contamination during placement. Even a brief exposure to saliva during the bonding stage can compromise the adhesive interface, leading to microleakage, marginal staining, and premature failure.

Research consistently shows that composite restorations placed under rubber dam have stronger adhesive bonds and lower failure rates than those placed in conventionally isolated fields. For ceramic adhesive cementation — where contamination during try-in or cementation is a real risk — rubber dam is essentially non-negotiable for predictable results.

2. Airway Protection

This one is straightforward and often overlooked in clinical discussions, but it matters enormously from a medicolegal perspective. Rubber dam prevents small instruments, file fragments, crowns, inlays, retraction cord, and other items from being swallowed or aspirated.

The consequences of an aspirated dental instrument are serious — potential airway obstruction, respiratory complications, and significant patient distress. Rubber dam is the most reliable prevention. It also forms part of your defensive documentation.

3. Soft Tissue Retraction and Visibility

One of the underappreciated benefits of rubber dam is the working visibility it creates. By retracting the lips, cheeks and tongue and collapsing them away from the field, the dentist has unobstructed access to the tooth from almost any angle. Combined with good lighting, this makes fine work — proximal box preparation, margin refinement, layering composite — considerably easier.

4. Patient Comfort

Counterintuitively, many patients who experience rubber dam for the first time report that they prefer it. The dam prevents them from tasting materials, reduces the water spray entering their throat, and — for longer procedures — allows them to rest their jaw in a partially open position without having to hold it actively. Fatigue and the gag reflex are both reduced.

Patient acceptance is rarely the barrier dentists assume it will be. Once comfortable with their own placement technique, most clinicians find that communicating the benefits to patients is straightforward.

5. Infection Control

Rubber dam reduces aerosol generation in the operative field and creates a physical barrier between the working area and the rest of the oral environment. For procedures involving the pulp or periapical region, it is a fundamental infection control measure.

"Once you're confident placing it efficiently, rubber dam stops feeling like an extra step and starts feeling like the natural way to work." - Dr Nika Abolseldgh

Why Don't More Dentists Use It Routinely?

The honest answer is usually one of the following:

• Time pressure — placement takes longer than it should until the technique is well-practised

• Limited confidence with clamp selection and placement on difficult teeth

• Concern about patient acceptance

• Not having been taught it systematically in undergraduate training

• Lack of a reliable, efficient system — using the wrong equipment makes it harder than it needs to be

None of these are insurmountable. The single biggest factor is technique and confidence. Dentists who struggle with rubber dam are almost always using it infrequently, which means they never develop the fluency that makes it feel easy. The solution is a focused period of deliberate practice — ideally with expert guidance — until placement becomes automatic.

For most dentists, 20–30 placements with good technique guidance is enough to make it feel routine. After that, the time cost disappears almost entirely.

Which Procedures Should Rubber Dam Be Used For?

The short answer is: most restorative procedures. More specifically:

Strongly Recommended

• All composite restorations — anterior and posterior

• All ceramic adhesive cementation (veneers, onlays, crowns)

• All endodontic treatment (considered Essential from Medico-legal perspective)

• Glass ionomer restorations in moisture-sensitive areas

• Any procedure where airway protection is a consideration

Consider Routinely

• Onlay & Crown preparations where soft tissue management would benefit from isolation

• Fissure sealants in children (if cooperative)

• Any posterior restoration where proximal isolation would improve visibility and access

The one area where rubber dam is genuinely difficult is upper second molars and lower third molars — clamp placement can be challenging and the dam itself may not seat well. For everything else, with the right clamp selection and technique, there are very few contraindications.

Getting the Equipment Right

Much of the difficulty dentists experience with rubber dam comes from using inadequate or poorly matched equipment. Getting the basics right makes a significant difference.

The Dam Itself

Medium or Heavy weight non-latex dam is recommended for most restorative work — it provides good retraction without being difficult to punch and seat. Pre-cut sheets (15 x 15cm) are more convenient than rolls.

The Frame

Young frames (U-shaped metal) are the standard for most restorative procedures. Plastic frames with retention projections are useful when radiographs are needed during the procedure.

The Punch

A sharp, well-maintained punch is essential. A blunt punch tears rather than cuts cleanly, making placement of the dam around the tooth much harder. Replace or sharpen the punch regularly — this is one of the most commonly overlooked factors in difficult dam placement.

Clamps

Clamp selection is the area that causes most difficulty. A basic starter set of 6–8 clamps covers the majority of cases: a standard bicuspid clamp, a standard molar clamp, an anterior cervical clamp, a wingless clamp for upper molars, and a butterfly clamp for anteriors. Understanding which clamp works for which tooth anatomy — and being comfortable modifying clamp position — is the skill that unlocks confident rubber dam placement.

"The right clamp for the right tooth, placed confidently, is the difference between rubber dam feeling difficult and rubber dam feeling effortless."

Rubber Dam and the Patient Conversation

Patient communication around rubber dam is straightforward once you're confident about its benefits. Most patients who have never experienced it simply need a brief, honest explanation:

"I'm going to use a small rubber sheet to keep the area clean and dry while I work — it makes the result much better and means you won't taste anything during the procedure. Most patients actually find it more comfortable."

That's usually sufficient. The biggest barrier to patient acceptance is dentist hesitation — if you present it as routine and beneficial, patients treat it as routine and beneficial. If you apologise for it or treat it as unusual, patients pick up on that uncertainty.

How DENTER Teaches Rubber Dam

The Art of Isolation is DENTER's dedicated one-day hands-on course in rubber dam technique. It was created because rubber dam is one of the areas most frequently cited by dentists as something they know they should be doing better — and one of the quickest to improve with focused, well-structured practice.

The day covers:

• The evidence base for rubber dam in restorative dentistry

• Equipment selection — dams, frames, punches, clamps and accessories

• Hole sizing and pattern planning for single and multiple teeth

• Clamp selection and placement for anteriors, premolars and molars

• Managing difficult anatomies — short clinical crowns, second molars, crowded anteriors

• Integrating rubber dam into your workflow without extending appointment time

• Patient communication and consent

• Hands-on practice throughout the day on typodont models placed in a phantom head.

The course is limited to 12 participants and includes online pre-learning access before the day, so the hands-on session focuses entirely on technique rather than background theory.

If rubber dam is something you know you should be doing more — or if you've tried it and found it frustrating — this course is the most direct route to making it a confident, routine part of your practice.

The Art of Isolation — Upcoming Course Date

Saturday 18th April 2026  ·  Central London, Bloomsbury  ·  £640  ·  8 ECPD Hours

Limited to 12 participants. Includes online pre-learning platform access before the day.