Meet The Team

Diente Dental Team 

Elena Heredia, DDS

Dr. Elena Heredia is a native Californian who attended the University of California, Davis where she majored in Biological Studies. She obtained her Doctor of Dental Surgery degree from The University of California, San Francisco. Upon her graduation she was recognized as the Dean's scholar for demonstrating outstanding academic achievement and community service. Since her graduation from dental school Dr. Heredia has strived to provide the quality dental care with genuine commitment to the overall well-being of her patients. Dr. Heredia maintains professional memberships with the American Dental Associat​ion, California Dental Association, Academy of General Dentistry, and the San Francisco Dental Society. Dr. Heredia was born and raised in Los Angeles, California. She later relocated to Sacramento where she discovered her passion for dentistry. She resides in San Francisco with her family.

Kathleen Marcelo, DDS

Dr. Marcelo grew up in Los Angeles, CA. She graduated from the University of California, Irvine with a Bachelor’s degree in Biological Sciences. She then continued her studies at the University of California, San Francisco (UCSF) where she earned her Doctor of Dental Surgery (DDS) degree. Afterwards, she completed a General Practice Residency at Cambridge Health Alliance/Harvard School of Dental Medicine in Boston, MA. During her residency, she participated in numerous dental public-health and community outreach events to serve the needs of the local community. She is also currently conducting dental research at the Department of Dentistry at Boston Children’s Hospital.

Dr. Marcelo provides quality dental care to help her patients achieve a healthy smile. More so, she holds great value and commitment to patient education, prevention, and comprehensive dental care. Dr. Marcelo is a member of the American Dental Association and the California Dental Association.

In her free time, she enjoys going on group hiking trips and currently resides in San Francisco.


Helen Alfaro-Ruiz

Registered Dental Assistant

Helen was born and raised in San Francisco, went to school in the Excelsior district. Right after High School, she went to San Francisco State University to pursue a degree in Dance. After she moved on to accomplish a career in Science, motivating her to become a Register Dental Assistant. Helen is bilingual in Spanish. She has a passion for dancing and for many years has been a part of a Brazilian group called Fogo Na Roupa. In her free time she enjoys running, music, art and traveling.


Melina Rivera

Dental Assistant

Melina was born and raised in Colombia where she graduated with a bachelors degree in Dentistry with emphasis in oral surgery. Upon graduating from school she started traveling extensively before moving to San Francisco 4 years ago. She also studied acoustic guitar in the conservatory of California Colombia and enjoys being outdoors.

Cristina Flemings

Office Manager

Cristina is dedicated to providing our patients with an amazing experience, beginning with the first phone call and continuing on through their visits.  She grew up in Napa Valley and has been in the dental field for over twelve years and loves it! The best part of her job is helping patients understand how important oral care is. She is also a fabulous dental assistant. Cristina makes sure everyone feels at home and leaves the office with a smile. She loves to joke around. In her free time, she enjoys football and camping with her family and friends.

Raquel Gharrity

Insurance Coordinator

Raquel Gharrity, as a people person, her favorite part of the day is interacting with our patients and being able to facilitate a positive experience with them. She has been in the dental field for over 3 years now. She likes to keep the office atmosphere light and fun and work closely with staff and patients to provide the ultimate care. Her goal with every patient is to help them become comfortable with the office and feel like part of the Diente Dental/ Marina Grins family. She is a proud San Francisco native, and a huge SF Giants fan and in her free time, she loves to read, draw, and go to concerts with friends.


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Office Location

  • San Francisco
  • 2460 Mission St #102
  • San Francisco, California
  • 94110
  • Map & Directions
  • Call: (415) 282-8462