Front Seat Head Restraint problems of the 2003 Dodge Ram 1500

I was forced to break quickly. During this my son hit his head on the rear seat window of my 2003 quad cab Dodge ram truck. This occurred at 30 mph. My concern is the great potential for spinal and head injury at higher speads. The 2004 trucks have rear head restraints to stop the direct impact of the head and neck to the rear glass window. I called doge and they were not concerned.