Restorative Dentistry has seen an unprecedented advancement by leaps and bounds in the past few decades, aimed towards making treatment more efficient and convenient. With the growing popularity and demand for esthetics and advances in adhesive dentistry, developments in material science have significantly progressed. This book presents a comprehensive overview of the composition, properties, manipulative variables and performance of the conventional Glass Ionomer Cement and the advancements in its chemistry, clinical application and performance that offers great promise in the treatment of early carious lesions.