NEX RESIN SEAL (Resin Modified root Canal Sealer)

A Resin-modified root canal sealer is an endodontic sealer containing resin (usually epoxy or methacrylate) used during obturation in root canal treatment (RCT) to seal the space between gutta-percha and the root canal wall. It improves adhesion and provides a tight seal.

A resin-modified root canal sealer is a dental sealing material based on resin polymers that is placed in the prepared root canal to fill gaps and prevent bacterial leakage after cleaning and shaping of the canal.

Its main goal is to create a hermetic seal between:

dentin wall

obturating material (gutta-percha)

Typical components include:

Powder

Bismuth oxide (radiopacity)

Titanium dioxide

Methenamine

Liquid

Epoxy resin or methacrylate resin

These components are mixed to produce a sealer with good flow and sealing ability.

Important properties of resin-modified sealers:

Excellent adhesion to dentin and gutta-percha

Low solubility in oral fluids

Minimal shrinkage during setting

Good flow and penetration into dentinal tubules

Radiopaque (visible on X-ray)

Good biocompatibility

Strong sealing ability

Long-term dimensional stability

Low dissolution

Good flow into accessory canals and tubules

Common examples used in endodontics include:

Used during obturation phase of RCT:

Canal cleaning and shaping

Sealer placed inside canal

Gutta-percha cone inserted

Lateral or vertical condensation

Sealer fills microscopic spaces