Which of the following is a true characteristic of compomers?

Compomers, or composite resins modified with glass ionomer components, possess several characteristics that make them unique. One of the hallmark features of compomers is their ability to create a chemical bond with the tooth structure. This bonding is facilitated by the presence of polyacrylic acid within the material, which allows for adhesion to dentin and enamel. This bond is critical because it enhances the stability of the restoration and contributes to the overall longevity and effectiveness of the material within the oral environment.

In contrast, while some of the other options might describe certain properties related to dental materials, they do not specifically highlight a defining trait of compomers. For instance, while compomers may exhibit some degree of fluoride release, it is not as significant as that found in glass ionomer cements. Their wear resistance, while present, is generally lower than that of traditional composite resins, and their rechargeability with fluoride is more relevant to other materials like glass ionomers instead of compomers. Therefore, the capacity for chemical bonding to tooth structure stands out as a true characteristic of compomers.