Downtown Dental Specialty is a root canal specialist and endodontist. Our expertise is in root canals, and we make sure your teeth are strong on the inside and out. Find periodontics, prosthodontics, endodontics, and emergency therapists. Our expert orthodontists are Dr. Mohammad Sirjani, DDS; Dr. Vicki C. Petropoulos, DMD, FACP, MS, and Dr. Ghassemi, DDS, MS.