General Dentist

Dr. Nathan Christensen is an advocate of biomimetic dentistry (minimally invasive dentistry preserving maximum natural tooth structure) and has done extensive post- graduate work at UCLA in root canal treatment. His memberships include the American Dental Association, California Dental Association, Academy of General Dentistry and Academy of LDS Dentists.

Dr. Nathan Christensen graduated from the Hermam Ostrow School of Dentistry at USC in 2012. During his educational period he achieved and partook in many activities, including serving as the USC Student Chapter President from 2010 to 2011 and making the Dean’s list Summer 2009, Fall 2010 and Spring, Summer and Fall 2011.

Dr. Nathan Christensen volunteers service at monthly clinics. He also volunteered at the International Clinic in Belize in April of 2011. For this, he was given a humanitarian award for service to the children of Southern California and Belize.


Dr. Nathan Christensen is a member of several local and national dental organizations including:

  • American Dental Association
  • California Dental Association
  • American Academy of Cosmetic Dentistry
  • Academy of General Dentistry
  • Academy of LDS Dentists


Hemant Sachdeva, DDS, brings extensive experience in preventive and cosmetic dentistry to Rancho San Diego Dental Group in El Cajon, California.

Dr. Sachdeva was born and raised in central California. He earned his undergraduate degree from UC Berkeley and obtained his Doctor of Dental Surgery from the Herman Ostrow School of Dentistry of the University of Southern California. At USC, doctor Sachdeva also earned the Thor Award for providing outstanding service to handicapped and disadvantaged patients.

Outside of the office, Dr. Sachdeva loves using his dentistry skills to provide humanitarian service. During the course of his career, he’s traveled as far as Cambodia to provide dental service for those in need. He’s also worked with veteran and homeless populations throughout California to promote preventive oral health care and improved hygiene.

Dr. Sachdeva is fluent in English, Spanish, Punjabi, and Hindi. When he isn’t working with patients, Dr. Sachdeva enjoys hiking, camping, and playing sports such as tennis, racquetball, and golf. He welcomes any patient seeking comprehensive oral health care to Rancho San Diego Dental Group.