Final answer:
Glass ionomers are best suited for 3) Class III cavity classification.
Step-by-step explanation:
Class III cavities are located on the proximal surfaces of anterior teeth. These cavities involve the interproximal surfaces, meaning the areas where two teeth are adjacent to each other. Glass ionomers are a type of dental restorative material that can chemically bond to tooth structure, making them ideal for repairing these types of cavities.
Class I cavities involve the pits and fissures on the occlusal surfaces of molars and premolars. Class II cavities involve the proximal surfaces of molars and premolars, which are more commonly repaired with amalgam or composite resin restorations.