Operative dentistry: Treatment of deep seated caries

Pulpal protection:
?For teeth with a normal pulp or reversible pulpitis a protective liner (sub-lining or sub-base) or lining (base) is used (such as calcium hydroxide or glass ionomer cement).
?liner or base is a material that can be placed on the pulpal surface of a cavity. It must cover the exposed dentinal tubules and act as protective barriers between dentine (and sometimes pulp) and the restorative material.
?Pulpal protection requires consideration of
?chemical protection.
?Electrical protection.
?thermal protection.
?pulpal medication,
?mechanical protection
?The characteristics of the liner or base selected are largely determined by the purpose it is expected to serve. Because they share similar objectives. Their objectives are:
?minimizes pulp tissue injury, preserves the tooth vitality and promotes pulp tissue healing.
?minimizes microleakage.
?minimizes postoperative sensitivity.
?In a shallow or moderately deep cavity, all carious dentine should be removed leaving a glossy hard dentin surfaces. While, in treatment of deep carious lesions, the dentist has several options to do.