With so much variety in the market, you will find car seat cushions that are either orthopedic or not. Mostly, there is not much difference between the two. But if you want to ensure you are buying a medically tested item for your spinal issue, going for an orthopedic one is a good idea. Orthopedic cushions are specially designed to offer better support, especially if you have to sit in the same position for long hours.