Cavity Liners

What are Cavity Liners?

Cavity liners are thin protective coatings applied to the floor and pulpal wall of a prepared cavity before the final restorative material is placed — calcium hydroxide, glass ionomer, resin-based varnish or antiseptic lining solution — to seal exposed dentinal tubules, stimulate reparative dentine formation in deep preparations, thermally insulate the pulp from metallic restorations and chemically isolate the pulp from acidic resin monomers in composite or self-etch adhesive systems. They are routinely placed in deep Class I and Class II preparations where remaining dentine thickness is less than two millimetres above the pulp horn.

Types of Cavity Liners at Dentalkart

Self-Cure Calcium Hydroxide Cavity Liners

Classical two-paste calcium hydroxide liners that set chemically without light. The category-defining product is Dentsply Dycal, used clinically for over five decades for direct and indirect pulp capping and deep-cavity lining. Waldent supplies pure calcium hydroxide powder for clinics that prefer mixing their own consistency.

Light-Cure Calcium Hydroxide Cavity Liners

Light-cure (LC) calcium hydroxide formulations set on demand under the curing light, give a firmer surface than self-cure pastes and integrate cleanly with subsequent composite layering. Ultradent Ultra-Blend Plus, MAARC Calx LC, Medicept Hydrocal LC, Meta Biner LC and Vishal Dentocare Apical LC all sit in this segment with varying radiopacity and barium content.

Glass Ionomer Cavity Liners

Glass ionomer cement (GIC) liners chemically bond to dentine, release fluoride to inhibit secondary caries at the cavity floor and are routinely chosen as a base-replacing liner under composite and amalgam. GC Gold Label 1 is the most widely used luting-and-lining GIC in this class, with Waldent Glasseal and LC GI Line as light-cure variants.

Resin-Based Cavity Varnishes

Resin-based cavity varnishes are applied in a very thin film to seal exposed dentinal tubules and act as a chemical barrier between the dentine and the restorative material — particularly under amalgam where microleakage and galvanic discomfort are concerns. Ammdent Cavlaq is a representative cavity varnish in this segment.

Antiseptic Cavity Lining Solutions

Antiseptic lining solutions deliver an antibacterial action at the cavity floor before final restoration placement — useful in cavities with residual carious dentine or where pulp protection is needed against bacterial recolonisation. D'Cult Carbo Resin antiseptic cavity lining solution is a specialty product in this segment.

When Are Cavity Liners Used?

Cavity liners are used in deep Class I, II and V preparations where remaining dentine thickness above the pulp is less than two millimetres, in indirect pulp capping where caries excavation has left a thin dentine bridge, after carious dentine removal where pulp protection is required before restoration, and beneath resin cement layers when freshly cut dentine needs a chemical barrier. They are not routinely needed in shallow or moderate-depth preparations where remaining dentine itself is enough thermal and chemical insulation.

How to Choose a Cavity Liner

Decide based on remaining dentine thickness first — deep preparations with less than 0.5 mm of dentine over the pulp call for a calcium hydroxide direct or indirect pulp cap, medium-depth preparations 0.5 to 2 mm call for a liner, and preparations with more than 2 mm of dentine usually need no liner. Match polymerisation mode to chairside workflow — self-cure for areas without easy light access, light-cure for speed. Match liner chemistry to the restorative on top — GIC or RMGIC liners under composite for chemical compatibility, calcium hydroxide plus varnish under amalgam for thermal and galvanic protection. Check radiopacity if post-operative radiographic monitoring matters — barium-supplemented and GIC variants show clearly on radiographs.

Top Brands of Cavity Liners at Dentalkart

Dentalkart stocks Dentsply Dycal, Ultradent Ultra-Blend Plus, GC Gold Label 1, MAARC Calx LC, Medicept Hydrocal LC, Meta Biner LC, Vishal Dentocare Apical LC, Ammdent Cavlaq, Waldent (Glasseal, Dentical LC, Calcium Hydroxide Powder) and D'Cult Carbo Resin — covering self-cure and light-cure calcium hydroxide chemistries, glass ionomer liners, resin-based varnishes and antiseptic cavity lining solutions for every preparation depth and restorative material combination.

Why Buy Cavity Liners from Dentalkart?

Dentalkart supplies clinic-grade cavity liners at distributor pricing, trusted by 50,000+ dentists across 110000+ Indian pincodes. Authentic brand sourcing, GST invoicing, COD on eligible orders and fast pan-India shipping. Bundle your cavity liner with the rest of your pulp-protection and base materials in Liners & Bases to complete the deep-cavity protocol in a single order.

What is a cavity liner used for?

A cavity liner is used to protect the pulp before the final restorative material is placed — it seals exposed dentinal tubules, stimulates reparative dentine formation in deep preparations, thermally insulates the pulp from metallic restorations and chemically isolates the pulp from acidic monomers in composite and self-etch adhesive systems.

What is the difference between a cavity liner and a cavity base?

The difference between a cavity liner and a cavity base is thickness and function — a liner is a thin protective coating less than 0.5 mm thick used primarily for pulp protection and tubule sealing, while a base is a thicker bulk material 0.5 mm or more thick that replaces lost dentine bulk and provides thermal insulation under restorations like amalgam.

When should I use a calcium hydroxide liner versus a glass ionomer liner?

Use a calcium hydroxide cavity liner when the goal is to stimulate reparative dentine in a very deep preparation close to the pulp, and use a glass ionomer cavity liner when the goal is chemical bonding to dentine, fluoride release for secondary-caries protection and compatibility under a composite restoration where eugenol-free chemistry is required.

Can cavity liners be used under composite restorations?

Cavity liners can be used under composite restorations provided the liner chemistry is compatible with resin polymerisation — light-cure calcium hydroxide, glass ionomer and resin-modified glass ionomer liners are all suitable, while eugenol-based liners must be avoided because eugenol residue inhibits resin polymerisation and compromises the composite bond.

What is the difference between self-cure and light-cure calcium hydroxide liner?

The difference between self-cure and light-cure calcium hydroxide liner is the setting mechanism — self-cure two-paste systems like Dentsply Dycal set chemically without needing a curing light and suit cavities with restricted light access, while light-cure variants such as Ultradent Ultra-Blend Plus and MAARC Calx LC set on demand under the curing light and integrate cleanly with subsequent composite layering.