Houston Dentistry Armstrong Katzmark DDS has one of the best dentists near you in Richmond Ave who offers general, cosmetic, restorative, emergency, and pediatric dental procedures. Call our dentist in Houston, TX, for our services today. Working Hours: Monday 8:00 AM - 6:00 PM Tuesday 8:00 AM - 6:00 PM Wednesday 8:00 AM - 6:00 PM Thursday 8:00 AM - 6:00 PM Friday Closed Saturday Closed Sunday Closed