Rubber dam clamp selection — anteriors, premolars & molars
The right clamp turns rubber dam isolation from a wrestling match into a 30-second routine. Here's the full clamp chart for every tooth — winged vs wingless, jaw position, and the complete ErgoDenta range.
Rubber dam isolation is the single most under-used asset in modern restorative dentistry. The barrier — moisture control, retraction, infection control, patient airway protection — pays dividends every minute of an adhesive procedure. The bottleneck for most clinicians is clamp selection: the wrong clamp won't seat, the right clamp seats first time. ErgoDenta carries 76 rubber dam clamps across the Ivory, Brewer and B-series numbering systems, plus 12 rubber dam instruments (punches, frames, forceps).
Why clamp selection matters
A correctly chosen rubber dam clamp seats first time, sits passively on the cervical aspect of the tooth, and stays put for the entire procedure. The wrong clamp slips, irritates the gingiva, springs off mid-prep, or simply won't seat at all — producing the frustration that has stopped many clinicians using rubber dam in the first place.
The right clamp depends on three variables: tooth position (anterior / premolar / molar), tooth size and curvature, and whether you want a winged clamp (wings hold the dam in place) or wingless (clean access, dam goes on first).
Chapter 2Tooth-by-tooth clamp chart
Anterior teeth
- Upper or lower incisors — Fig. 9, Fig. 00, Fig. 212 (retention clamp for cervical / Class V access)
- Canines — Fig. 9, Fig. 106L / 106R (left/right specific)
Premolars
- Upper premolars — Fig. 0, Fig. 1, Fig. 2, Fig. 2A
- Lower premolars — Fig. 0, Fig. 1, Fig. 2 (smaller jaws engage smaller premolars)
Molars
- Upper molars (general) — Fig. 10, Fig. 11, Fig. 14, Fig. W8A (winged)
- Lower molars (general) — Fig. 12A, Fig. 13A, Fig. W7A
- Partially erupted molars — Fig. B4, Fig. 14A (deeper-jaw clamps)
- Third molars — Fig. B5, Fig. B6 (specifically for posterior access)
Retention & Class V
- Cervical retraction (Class V) — Fig. 212 — the classic "212" with bowed jaws that retract gingiva for cervical access. Indispensable for cervical caries, Class V composites and crown lengthening cases.
Winged vs wingless — when to choose which
Winged clamps have small projections on the bow that hold the rubber dam in place when the dam is stretched over them. Wingless clamps don't have these projections.
- Winged technique — punch the dam, attach to the clamp wings, then pop the dam-clamp-frame combo onto the tooth as a single unit. Fast for single-tooth isolation.
- Wingless technique — place the clamp on the tooth first, then stretch the dam over the clamp bow. Useful when access is tight or when the wings would interfere with mirror placement.
Most operators settle on one technique and stock clamps that match. ErgoDenta carries both winged (W-prefix) and wingless variants of the popular figure numbers.
Chapter 4The supporting kit — what else you need
- Rubber dam punch — Ivory (Fig. 2740, 16 cm) is the classic; Ainsworth (Fig. 2741, 17 cm) is the alternative. Both have rotating heads with multiple hole sizes.
- Clamp forceps — Brewer (Fig. 2711), Ivory (Fig. 2715), Stokes (Fig. 2712), Washington (Fig. 2713), White (Fig. 2714). Different jaw geometries for different operator preferences.
- Rubber dam frame / stand — Fig. 2750 (small) or Fig. 2753 (medium) for tensioning the dam.
- Steel organising board — Fig. 2761, holds the full clamp set in numerical order in the cassette.
Common mistakes to avoid
- Clamp too small for the tooth — slips supragingivally and won't seat. Always choose the next-larger size up if in doubt.
- Clamp too large — lateral forces against the gingiva, pain, slipping. The bow of the clamp should match the curvature of the cervix.
- Wrong winged/wingless — using winged technique on a tooth where the wings interfere with mirror placement. Switch to wingless for difficult posterior access.
- No floss tie-back — every clamp should be tied with a 30 cm length of floss before placement. If the clamp pops, the floss prevents aspiration.
- Forgetting the 212 — Class V cases need the 212 retention clamp; using a standard premolar clamp will not retract the gingiva enough for cervical access.
Clamp selection by tooth — quick reference
| Tooth | Primary clamps | Backup clamps | Notes |
|---|---|---|---|
| Upper / lower incisors | 9, 00 | 106L, 106R | Use 212 for cervical access |
| Canines | 9, 106L/R | 00 | L/R variants follow tooth side |
| Premolars | 0, 1, 2, 2A | - | Smaller jaws for lowers |
| Upper molars | 10, 11, 14, W8A | - | W = winged variant |
| Lower molars | 12A, 13A, W7A | - | 12A/13A for lowers specifically |
| Partially erupted molars | B4, 14A | - | Deep-jaw variants |
| Third molars | B5, B6 | - | Posterior access geometry |
| Cervical / Class V | 212 | - | Bowed jaws for gingival retraction |
Stock the right rubber dam clamps
76 rubber dam clamps across Ivory, Hygenic and B-series numbering, plus 12 supporting instruments — punches, forceps, frames, organising boards. The full isolation kit from ErgoDenta.
Browse all 76 rubber dam clamps →Frequently asked questions
Which rubber dam clamp do I use for an upper molar?
Fig. 10, Fig. 11 or Fig. 14 are the standard upper molar clamps. Fig. W8A is the winged variant. For partially erupted upper molars, choose Fig. B4 — the deeper jaws engage tooth structure that's still partially submerged. Most kits stock at least three of these so the right size is always available.
What is a Fig. 212 clamp used for?
Fig. 212 is a cervical retention clamp with bowed jaws designed to retract the gingiva for Class V (cervical) restorative access. It's not for general isolation — it's a specialised clamp for cervical caries, Class V composites, crown lengthening cases and any restoration where you need gingival retraction below the cervical line.
Should I use winged or wingless rubber dam clamps?
Winged clamps let you attach the dam to the clamp wings before placement, then pop the entire dam-clamp-frame onto the tooth as a single unit — faster for routine isolation. Wingless clamps require the clamp to be placed first, then the dam stretched over it — better for tight posterior access where the wings would interfere with mirror placement. Most operators settle on one technique.
What's the difference between Brewer and Ivory clamp forceps?
Both are rubber dam clamp forceps designed to engage and place clamps on teeth. Brewer (Fig. 2711) has a more curved jaw geometry that some operators find better for posterior placement; Ivory (Fig. 2715) has a straighter jaw geometry that's slightly more versatile. Both are 17 cm and made of stainless steel — choice comes down to operator preference.
Do I need to tie floss to every rubber dam clamp?
Yes — always. Tie a 30 cm length of dental floss through one of the bow holes before placement. If the clamp slips off the tooth during the procedure, the floss is your aspiration safeguard. Skipping this step risks the clamp falling into the airway, which is the most serious complication of rubber dam isolation.
What's the difference between Ivory and Ainsworth rubber dam punches?
Both have rotating heads with multiple hole sizes (typically 5 different sizes for incisors, premolars, molars, etc.). Ivory (Fig. 2740, 16 cm) is the classic and slightly more compact; Ainsworth (Fig. 2741, 17 cm) is slightly longer and gives more leverage. Both punch clean holes in standard rubber dam material; choice is operator preference.
Why does my rubber dam clamp keep slipping off?
Three common causes: (1) clamp too small — choose the next size up. (2) Clamp jaws not engaging the cervical undercut — reposition with the forceps. (3) Wrong clamp design for that tooth position — review the chart and pick the correct figure number. If a clamp slips repeatedly, switch to a larger or different design rather than trying to force the same one.
Can I autoclave rubber dam clamps?
Yes — all ErgoDenta rubber dam clamps are made of surgical-grade stainless steel and are fully autoclavable. Store them on a steel organising board (Fig. 2761) in the cassette to protect the bow geometry from being deformed during reprocessing. A deformed clamp won't seat correctly.
What size rubber dam frame should I use?
Fig. 2750 (9×10 cm) for single-quadrant isolation; Fig. 2753 (10×11 cm) for split-arch or whole-arch isolation. Plastic Young frames are also available. The frame should be large enough to keep the dam taut beyond the field but not so large it interferes with mirror placement or the assistant's access.
How many rubber dam clamps do I need to stock?
Minimum starter set: Fig. 9 (anterior), Fig. 0 (premolar), Fig. 10 (upper molar), Fig. 12A (lower molar), Fig. 212 (cervical). Five clamps cover most isolation cases. Build out to a 12–15 clamp set as caseload grows, including B-series for partially erupted molars and Fig. 106L/R for canines.