Final answer:
The anterior view is used to demonstrate vertical patellar fractures and the patellofemoral articulation.
Step-by-step explanation:
The position used to demonstrate vertical patellar fractures and the patellofemoral articulation is the anterior view. This view allows for a clear visualization of the relationship between the patella and the distal femur. By examining the anterior view, doctors can identify any fractures or abnormalities in the patella and assess the condition of the patellofemoral articulation.