Which type of dental impression material is typically used for making molds?

Alginate is the correct choice for making molds in dentistry due to its favorable properties. Alginate is a hydrophilic, flexible material that captures fine details of the oral cavity, making it ideal for creating accurate impressions of teeth and gums. It sets quickly, allowing for efficient usage in a clinical setting.

The material's ability to capture details without damaging the soft tissues also contributes to its popularity. Once set, alginate impressions can be used to create models or casts for various dental procedures, such as orthodontics, prosthodontics, or restorative work.

Wax, while sometimes used for bite registrations or temporary impressions, lacks the detail and elasticity needed for making definitive molds. Acrylic is primarily used for creating dental prosthetics and is not used for impressions. Composite materials are typically used in restorative procedures, such as fillings or crowns, rather than in making impressions. Thus, alginate stands out as the most suitable option in this context.