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Oakland, CA


Team Members


Doctor Biographies

Ron Bullard, DDS

A graduate of Howard University School of Dentistry, Dr. Ron Bullard has almost 40 years of experience in dentistry. For 20 years, he served as an expert examiner on the California State Dental Board. Dr. Bullard trained for his Invisalign clear braces certification with some of the most prominent providers of Invisalign in the world. He rapidly became known as a leading dentist for clear braces in Oakland. In a commitment to continually expanding his knowledge in his profession, Dr. Bullard is a member of the American Dental Association, National Dental Association, and California Dental Association.

Dr. Jessica Ma, DDS

Dr. Jessica Ma is a bay area native, born and raised in San Jose. She attended UCLA for her undergraduate degree, and continued her studies at the UCLA School of Dentistry. She served 1 year with AmeriCorps in St. Paul, Minnesota working to address lack of access to affordable oral health care.

Dr. Ma believes in empowering patients through education to obtain and maintain a healthy mouth and confident smile.

Dr. Ma loves to be in nature, and spends her free time rock climbing, road biking, mountain biking, and backpacking.

Dr. Maria G. Pina DDS

Dr. Piña is a native of Mexico City and has been trained with well established dental professionals in Mexico and the United States. She has gotten great experience working with multilingual and culturally diverse patients. As a compassionate practitioner with a natural talent to listen and address the concerns of her patients. She provides comfort and ease to their dental care needs.

Piña graduated from the Universidad Autonoma de Mexico, in Mexico City and is trained in all aspects of Dentistry including, Cosmetic Dentistry, and Invisalign. She is very active in the Dental Community and is a Member of the American Dental Association, California Dental Association, and the San Francisco Dental Association. She is committed to helping make dental care more accessible for everybody and to local Philanthropy. She participates and aids organizations such as HOMELESS CONNECT, CDA CARES, TZU CHI INTERNATIONAL MEDICAL ASSOCIATION to provide dental care to homeless, low-income residents and the Delancy's Street Foundation residents. Her strong beliefs in Prevention and Education for an overall Dental Health, have encouraged her to join and support the efforts of the San Francisco Dental Society and the Unified School District to provide Dental Screenings and Dental Education to Kindergartners in the San Francisco Public Schools for the last decade. She is also an active member of the San Francisco Service Corps Mother/Son Chapter.

When Dr. Piña is not at work, you'll find her running with her dog in Crissy Field. Also volunteering with her son helping Philanthropies in San Francisco. Hiking, Skiing, and Paddleboarding are some of her favorites. She loves dancing, cooking, and as a food lover, trying different restaurants, and wine and champagne tastings make the end of her week very fun.

Carla Belden RDH


Carla has been with Unlimited Smiles Oakland since August 2018. Since joining, she has already developed strong and lasting relationships with so many of our patients. Her professionalism and passion for patient care exemplify what Unlimited Smiles is all about.

Carla obtained her Bachelor's degree and majored in Biochemistry and Cellular Biology from the University of California, San Diego. Carla also received her Associates in Dental Hygiene from Concorde College.

Carla lives with her husband of 5 years and has just recently moved to the Bay area from San Diego. Together they have two fur children, an American Eskimo named Jasper and an Aussie Shepherd named Kai. In her spare time, Carla loves working out and watching Netflix shows. She also loves to travel, bake chocolate chip cookies, and hike outdoors on the weekend.

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