Polyalkenoate cements are a type of dental adhesive that are made from a mixture of a carboxylic acid and an ion-leachable glass. The phonetic transcription for the word is /ˌpɒliˈælkɪnəʊeɪt ˈsɛmənts/. The word is broken down into three syllables: poly-al-ke-no-ate. The stress falls on the second and fourth syllables. The word 'poly' refers to many, 'alken' refers to an unsaturated hydrocarbon, and 'oate' refers to a salt or ester of an organic acid. These cements are commonly used in restorative dentistry due to their biocompatibility and bonding strength.
Polyalkenoate cements are a type of dental cement that are used to bond restorative materials, such as resin composite fillings or metal crowns, to the natural tooth structure. They are versatile cements that offer several desirable properties in dental applications.
These cements are composed of a polyalkenoate acid liquid and a powdered glass filler. The polyalkenoate acid liquid, which is typically an aqueous solution of either polyacrylic acid or polyitaconic acid, acts as the cementing agent. The powdered glass filler, usually a finely ground glass ionomer, provides strength and stability to the cement.
One of the distinguishing features of polyalkenoate cements is their ability to chemically bond to both the tooth structure and the restorative material. This chemical adhesion, also known as chelation, occurs due to the interaction between the polyalkenoate acid and the metal ions present in the tooth and the restorative material. This results in a strong and durable bond, reducing the chances of debonding or leakage.
Polyalkenoate cements also have good biocompatibility, meaning that they are well-tolerated by the surrounding oral tissues. They release fluoride ions over time, which can help prevent tooth decay and promote remineralization.
Additionally, these cements have the advantage of being self-adhesive, meaning that they do not require the additional application of a bonding agent prior to placement. This simplifies the cementation procedure and saves chair-side time for the dental professional.
In summary, polyalkenoate cements are dental materials that offer excellent adhesive properties, biocompatibility, and fluoridation capabilities. They are commonly used in various restorative and preventive dental procedures for their reliable and long-lasting bonding capabilities.
The term "Polyalkenoate Cements" is a compound word combining "polyalkenoate" and "cements".
1. "Polyalkenoate":
The prefix "poly-" comes from the Greek word "polus", meaning "many" or "much", indicating that the substance is composed of multiple units or monomers. "Alkenoate" is derived from the term "alkene", which refers to a class of hydrocarbons that possess carbon-carbon double bonds. The suffix "-ate" in chemistry often denotes the presence of a carboxylate group (COO-), indicating the chemical composition of the compound.
Therefore, "polyalkenoate" refers to a polymer or compound composed of multiple alkene units or monomers. In the context of dental materials, it refers to a polymerized or cross-linked substance used for dental cements.