Dr. Heidi Ray was born and raised in Western Pennsylvania. She obtained her Bachelor of Science degree in the field of Chemistry from Westminster College in New Wilmington, PA. Having gained early admittance to Temple University's School of Dentistry, Dr. Ray migrated eastward to Philadelphia, Pennsylvania. At Temple, Dr. Ray continued her education and received her Doctorate of Dental Medicine and Endodontic residency certification.

Dr. Ray practiced endodontics for over 29 years with her brother, Dr. Herbert Ray. Together, they make up the only brother and sister team of board-certified endodontists in the United States. She has been a Diplomate of the American Board of Endodontics for over fifteen years.

Dr. Ray is involved in academia and organized dentistry. She serves as an assistant professor at the University of Pittsburgh School of Dental Medicine's Department of Endodontics. She enjoys spending time with and teaching the endodontic residents. She also has served as director of the Indiana and Westmoreland County branch societies of the Dental Society of Western Pennsylvania. Dr. Ray has contributed to endodontic literature through the publication of the often-cited paper: Ray HA, Trope M. Periapical status of endodontically treated teeth in relation to the technical quality of the root filling and coronal restoration. Int Endod J 1995;28:128.

Dr. Herbert Ray received his dental degree from Temple University Dental School in 1988 and his specialty training and endodontic certificate from Temple in 1990. Dr. Ray is a Diplomate of the American Board of Endodontics, a charter member of the American College of the American Board of Endodontics, Fellow, International College of Dentists, and Fellow, American College of Dentist. After twenty years of private practice, Dr. Ray became the Department Chair and residency program director of the endodontic department at the University Of Pittsburgh School Of Dental Medicine. During that time Dr. Ray has trained over 50 endodontic residents, authored several peer-reviewed papers, and two book chapters.

Dr. Robert Hasselbach is originally from the Pocono Mountains. He completed his undergraduate studies at East Stroudsburg University where he majored in biology with a minor in chemistry in 2010 where he was presented with an award for maintaining a 4.0 GPA throughout all four years of study. After undergraduate studies he received his masters degree in Biochemistry from the University of Scranton in 2012, receiving the distinguished student award for highest GPA in the chemistry department within the biochemistry concentration. At the University of Scranton, he was an instructor in the anatomy and physiology lab. He then attended the University of Pittsburgh School of Dental Medicine where he received his D.M.D. degree from the University of Pittsburgh in 2016.

Upon graduation, Dr. Hasselbach returned to the University of Pittsburghs School of Dental Medicine, where he completed a one-year residency in Advanced Education in General Dentistry. Following the AEGD residency, he then entered the Post-Doctoral Endodontic Residency Program at the University of Pittsburghs School of Dental Medicine, receiving an Endodontic Specialty Certification in 2019. Dr. Hasselbach is also employed in the University of Pittsburgh, Department of Endodontics as the Director of Endodontics Laboratory where he educates current second-year dental students on the science and application of endodontic techniques. He also supervises undergraduate and graduate endodontic students in the endodontic clinic at the school. Dr. Hasselbach has also contributed to endodontic literature, examining the effect of instrumentation quality of root canal systems.