What is the difference between a liner and a base?

Liners do not have the sufficient thickness, hardness, or strength to be used alone in a deep cavity, nor should they be used to achieve thermal protection or as a buildup material in a cavity preparation. In comparison, a base not only provides a barrier to chemical irritation, but can also provide thermal insulation.

What is a gingival seat?

22 PREPRATION OF GINGIVAL SEAT:- It is an external cavity wall that is perpendicular to the long axis of the tooth. It is extended beyond the contact area or up to the proximal lesion whichever is more. This also help in providing a contact clearance gingivally.

What is the purpose of a base in dentistry?

Bases can be considered as restorative substitutes for the dentin that was removed by caries and/or the cavity preparation. They act as a barrier against chemical irritation, provide thermal insulation, and can resist the condensation forces on a tooth when placing a restoration.

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

What is the difference between a base and a liner? Bases provide thermal insulation, and liners protect the pulp from irritants.

Is Dycal a base or liner?

Dycal® Calcium Hydroxide Liner is a two-component, rigid-setting, self-curing material designed for use in direct and indirect pulp capping and as a protective liner under dental adhesives, varnishes, filling materials, cements, and other base materials.

What is the depth of gingival seat in Class 2?

CLASS II AMALGAM RESTORATIONS. Initial depth is 1.5 mm from the central pit or 0.2-0.5 mm into dentin or 2mm from the prepared buccal and lingual walls.

What is a cavity base?

McCoy stated that a cavity base is a replacement material for missing dentinal tooth structure, used for bulk buildup and/or for blocking out undercuts. Hilton13 also defined a cavity base as a dentin replacement, either for bulk buildup and/or blocking out undercuts for indirect restorations.

Where is calcium hydroxide cavity liner placed?

It should be only used in the deepest spots in the cavity where the RDT is ≤0.5 mm. The placement of calcium hydroxide should be followed by a layer of RMGI to protect it from its drawbacks.

Can a varnish be used under a composite?

Although the use of cavity varnishes with composite resins has traditionally been discouraged, several “resin-compatible” varnishes are currently available. The results of the study indicate that these varnishes soften the composite resin in contact with varnished dentin.