Our Dental Team 

The perfect dentistry team for your smile!

Dr. Shanna Chirco 

Dr. Shanna Chirco loves practicing dentistry and interacting with patients.  Her passion is helping her patients improve their dental health and smiles and she looks forward to providing each patient quality, caring service in a warm and welcoming environment.  

"I love what I do! I love the technical challenges I face each day and also enjoy getting to know all my patients and being fortunate enough to help them out.  It is especially rewarding at the end of treatment to get a heartfelt thank you from the patient because they know we care about them and take immense pride in the care we provide.”

Dr. Chirco, formerly Dr. Shanna Koh, is a graduate of UC Irvine and USC's Herman Ostrow School of Dentistry. After dental school, she worked for more than ten years as an associate at both private practices as well as a large dental corporation.  This experience was invaluable for Dr. Chirco as she learned what best worked for patients and how to address every patient's needs. She has now spent more than a decade restoring and enhancing smiles. She is committed to providing patients with beautiful smiles through outstanding care. 

Patients undergoing treatment have her cell phone number and can always get in touch with any questions or concerns.  

Patients visiting Dr. Chirco can receive a full range of dental services.  She provides root canals, fillings, extractions, bridges, crowns, dentures, Invisalign, teeth whitening, mouth and snore guards, full mouth restorations and general consultations. Treatment is also available for dental emergencies and wisdom tooth problems. 

Call (562) 430-7310 today for an appointment to see Dr. Chirco or you can click on the button directly below to request an appointment.

Michelle Penhollow, RDH

Michelle is a Registered Dental Hygienist.  She studied her general education at the University of Hawaii.  Upon completion, she studied Dental Hygiene at San Joaquin Valley College, recently further her education at the University of the Pacific Dugoni School of Dentistry.  Michelle completed her studies for licensure as an RDH in Alternative Practice and is licensed by California to perform prophylaxis, scaling and root plannings, local anesthetic, subgingival curettage, nitrous oxide, and radiographs.  She is also certified to perform CPR.  Michelle is a member of the American Dental Hygienist Association, the California Dental Hygiene Association, and the Orange County Dental Hygiene Association.  

"Our practice is family-oriented.  We make sure our patients receive the utmost quality care they deserve.  All the employees make it a team effort every day we come to work.  I am truly blessed to be in a wonderful office," says Michelle.  She also enjoys the outdoors, her family, friends, and her dog Khalua.     

Michelle sees dental hygiene patients in the office on Mondays.  Call (562) 430-7310 today to schedule a hygiene appointment with Michelle.  

Barbara Fehn

Barbara has been with the office for more than 13 years, starting with Dr. Paranal.  She assists Dr. Chirco in all aspects of patient treatment and is so eager to attend to patient's comforts and needs.  She is well versed on OSHA regulations and strives to maintain our office in pristine condition by keeping up with latest information on sterilization methods and patient safety. 

Along with her husband Brian and two cats, she lives nearby in Cypress and is always the first one to open up the office. She enjoys traveling with her husband and always eager to try new things. Don't be surprised to see her great you with a hug and a bottle of water or coffee.

Tricia Herbas

Tricia Herbas is the office manager. She has worked with Dr. Chirco for more than five years. She is responsible for managing day-to-day operations in the office to assist the dental faculties to propagate a smooth work environment. She is always eager to help accomodate recommended treatment plans and to help patients obtain their best oral health. During her free time she loves spending time with her wonderful family and her dogs.

Erica Zito, RDH