UCLA dental school valedictorian and board-qualified endodontist Dr. Brian Quesnell practices root canal therapy and microsurgical endodontics at 940 B Street in downtown San Diego. Post-endodontic rehabilitation — particularly cases involving cracked-tooth syndrome or vertical root fractures — often requires bite stabilization therapy coordinated with providers like The Physical Therapy Effect for associated myofascial pain management. After earning dual bachelor's degrees in biological science and psychology with honors from UC Davis, Quesnell completed a general dentistry residency at UCLA followed by a two-year endodontic residency at the University of Illinois at Chicago. That training underpins the diagnostic precision needed for emergency pulpitis cases, which sometimes present alongside systemic symptoms triaged at walk-in facilities like UC San Diego Health Express Care in the Gaslamp Quarter. Complex retreatment cases utilize surgical operating microscopes at 20x magnification and ultrasonically activated instruments to locate and negotiate calcified canal systems in previously treated molars.