Top five and above 95 on boards. If you are top ten and above 90 you have a chance, too, but you will have your work cut out for you when it comes to application time. It is a good idea to apply to as many programs as you can. They say you need around seven interviews to be mostly assured of getting into a residency. Start working on your letters of recommendation now. Meaning go and talk to people in the ortho department enough for them to know you, and maybe work on some research with them. Good letters can make your application work, even with lower numbers. The other problem is where you go to dental school. Most residencies only interview 2-3 people from each school. If you go to UPenn or UCLA or Columbia you will have more trouble than if you go to, say, Nebraska. I don't know how many UNLV people are interested in ortho, but it can make a difference. Can't really change this, but it is good to keep in mind when you are designing your application strategy.