Rubber Dam Sheet

Thickness

Rubber dam sheets are available in various thicknesses, including thin, medium, heavy, extra heavy, and special heavy.
Heavy dams are not more challenging to apply than thinner ones, but they do have distinct advantages:
Greater durability: Heavy dams are less likely to tear
Better seal and tissue retraction: Heavy dams provide a more effective seal around the teeth and retract the gingival tissues more efficiently.
- This is especially beneficial in Class V restorations, where a cervical clamp is often used in conjunction with the rubber dam to apically flatten soft tissues and improve access.
Medium dams are ideal for situations where insertion is difficult due to tight proximal contacts or when the proximal contacts are broad and tooth mobility is limited.

Green and blue are preferred because they provide good contrast with the surroundings.
Green and blue are the most commonly preferred colors, as they provide excellent contrast against the surrounding tissues, enhancing visibility.
- They are also considered soothing colors for the eyes, which helps reduce strain during prolonged procedures.
The rubber dam sheet has two sides: a shiny side and a dull side.
- The dull side should face the operator to minimize light reflection

available in 5’’ × 5’’ or 6’’ × 6’’ inch square sheets. (12.5 × 12.5 cm or 15 × 15 cm²)
Rubber dam sheets are available in: 5” × 5” (12.5 × 12.5 cm) and 6” × 6” (15 × 15 cm).
The 6” × 6” size is typically used for isolation of posterior teeth in permanent dentition.
The 5” × 5” size is often used for primary dentition or anterior teeth.

The most popular material is latex, which offers flexibility and durability.
However, some patients are allergic to latex, so it’s important to have latex-free alternatives available, such as polyisoprene or vinyl.

Rubber dam materials, both latex and non-latex, deteriorate over time, which can result in decreased tear resistance.
As the material approaches its expiration date, it becomes brittle and tears more easily.
To check if the rubber dam material has passed it’s shelf life, perform a tear test by attempting to tear a sheet with your thumb and index finger.
- A new or good-quality rubber dam should be difficult to tear.
- If the material is brittle and tears easily, it may be past its shelf life.