What is a significant disadvantage of glass ionomer compared to other materials?

Glass ionomer materials are known for their ability to chemically bond to both enamel and dentin, providing good retention and a certain level of fluoride release. However, a notable disadvantage of glass ionomer compared to materials like composite or amalgam is its lower strength. This reduced strength can make it less suitable for high-stress areas in the mouth, such as posterior teeth that experience significant chewing forces.

While glass ionomer might be easier to handle and less sensitive to the mixing technique, its inherent mechanical properties do not match those of strong materials like composites or amalgams, which offer greater durability and resistance to wear. Therefore, when considering the longevity and performance of restorative materials in dental applications, it is crucial to recognize that the lower strength of glass ionomer is a significant limitation when selecting materials for specific clinical situations.