Final answer:
Both dental plaque and dental calculus can form on dental implants. Plaque can adhere to implants and if not removed, calcify into dental calculus or tartar, which requires professional cleaning to manage.
Step-by-step explanation:
The correct statement about the formation of dental plaque and calculus on implants is D. Both dental plaque and dental calculus can form on dental implants. Dental plaque is a bacterial biofilm that can adhere to the surface of dental implants, just as it does on natural teeth. If dental plaque is not regularly removed, it can harden and turn into dental calculus, also known as tartar, which is a calcified form of plaque. Dental calculus is more difficult to remove than plaque and can lead to inflammation and disease around implants if not properly managed.