A bonding agent is a dental adhesive resin used to help restorative materials stick to tooth structure. It is commonly used with tooth-colored fillings (composite resin) and sealants. It supports a tight seal between the tooth and the restoration to reduce gaps and leakage. In everyday language, people sometimes say “bonding,” but clinically the bonding agent is the adhesive layer, not the filling itself.

universal adhesive is a dental bonding liquid that helps restorative materials stick to teeth and, in many cases, to existing restorations. It is commonly used before placing tooth-colored fillings (composite resin) and during repairs or replacements of restorations. Many products called universal adhesives are designed to work with more than one bonding approach, depending on the clinical situation. In simple terms, it acts like a “bridge” between the tooth surface and the material the dentist places.

self-etch is a dental bonding approach that prepares tooth structure for adhesive restorations without a separate “rinse-off” acid-etch step. It is commonly used when placing tooth-colored fillings (composites), sealants, or bonding indirect restorations like crowns and veneers. In simple terms, it helps dental materials stick to enamel and dentin by conditioning the surface and infiltrating it with resin. Many modern “universal” dental adhesives can be used in a self-etch mode.

total-etch is a dental bonding approach where an acidic gel is used to etch both enamel (the hard outer tooth layer) and dentin (the softer layer underneath). It is commonly used before placing tooth-colored fillings (composite resin) and other bonded restorations. The goal is to help an adhesive “stick” reliably by creating a micro-textured surface for bonding. You may also hear it called an *etch-and-rinse* technique.

selective etch is a bonding technique used in restorative dentistry. It means applying an acid etchant to enamel (the hard outer tooth surface) while limiting or avoiding etching on dentin (the softer layer underneath). It is commonly used when placing tooth-colored fillings (composite resin), sealants, and some repair procedures. The goal is to improve enamel bonding while keeping dentin bonding more controlled and less technique-sensitive.

phosphoric acid etch is a dental conditioning step that prepares tooth surfaces for bonding. It is commonly used before placing tooth-colored fillings, sealants, and some repairs. It briefly contacts enamel or dentin, then is rinsed away. Its purpose is to improve how well dental adhesives and restorative materials attach to teeth.

acid etch is a dental surface-conditioning step that uses an acid gel or liquid to microscopically roughen tooth structure. It is most commonly used before bonding materials like composite (tooth-colored) fillings, sealants, veneers, and orthodontic brackets. The goal is to help adhesives “grip” the tooth more reliably. It is a standard part of many modern adhesive dentistry workflows.

enamel etching is a surface-conditioning step used to help dental materials stick to tooth enamel. It usually involves applying a mild acid gel to create microscopic texture on the enamel. This textured surface improves bonding for restorations and preventive treatments. It is commonly used with sealants, composite fillings, bonding procedures, and some indirect restorations.

postoperative sensitivity is tooth sensitivity that starts after a dental procedure. It is commonly discussed after fillings, crowns, deep cleanings, or whitening. It describes a symptom (what a person feels), not a specific material or device. Clinically, it helps dentists assess healing, bite function, and pulp (nerve) response.

microleakage is the microscopic passage of fluids, bacteria, or molecules between a dental restoration and the tooth. It happens at the margin (edge) where a filling, sealant, crown, or bonding material meets enamel or dentin. It is a key concept in restorative dentistry because it relates to how well a material seals the tooth. It is also widely used in dental materials research to compare techniques and products under controlled conditions.