WARNING: Dr. Barrow Marks is the worst dentist I have ever been to. In January 2011, I went to Dr. Marks who did two root canals and three crowns. The root canals were not done correctly and the three crowns his lab fabricated were over sized. I moved back to Los Angeles in June of 2011 and a few months later the two teeth that Dr. Marks performed the root canals on were massively infected. My oral surgeon in Beverly Hills informed me the root canals were not completed to the end of the root and thus caused these infections. I had to have up to six oral surgeries and retreatments to save my teeth. Unfortunately one could not be saved and had to be extracted. I spent over $6000 at Dr. Marks and hired an attorney to get me my money back but Dr. Marks' malpractice insurance, Fortress, denied the claim. I have now spent over $5000 to have surgeries, retreatments, extractions and a bridge fabricated to replace his AWFUL work and oversized crowns replaced at an out of pocket cost of over $11,000. Do yourself a favor and NEVER EVER see Dr. Barrow Marks for dental work.