Final answer:
Access cost is the term used to describe the switching cost incurred when changing dentists and paying for a new set of X-rays.
Step-by-step explanation:
When changing dentists and being required to pay for a new set of X-rays, this type of switching cost is referred to as access cost. Access cost is a term used in political science and refers to the use of resources, including money, time, and effort, to obtain a benefit or make a decision. In this case, the patient has to incur the cost of obtaining access to the new dentist's services, which includes the expense of the X-rays.