Cheap dentists in Houston?

Haven't had dental insurance in about 2 years, and I'm trying to schedule an appointment with an affordable dentist ASAP since I fear I might have some cavities that need to be filled. I'm currently staying in Southeast Houston (Alvin/Pearland area) and it'd be nice to avoid a far drive, but I'd of course be willing to make the drive to another part of town if I can save money on a cleaning/exam/filling.