About Us

Wayne Wu D.D.S.

Dr. Wu Graduated from New York University College of Dentistry in 1996 as one of the elite in the class. He devotes himself to advanced post-doctoral study with some of the most renowned dental educators and continuously utilizes the latest techniques and technology to provide the utmost care and precision. He is very passionate about perfecting dentistry for all of his patients. Whether it's general dentistry, cosmetic smile makeovers, orthodontics or full mouth reconstruction, his philosophy is to treat each patient in considering all aspects of dentistry as a whole. Initially from Taiwan, he has been a long time resident of Irvine for over 30 years. Now he is contributing back to this community where he grew up. At home, he is a chef and a wine connoisseur, and enjoys going to the local parks and playgrounds with his wife and three daughters.

Casey Chen B.D.S, Ph.D, D.D.S

Specialist in Periodontics & Dental Implants

Dr. Chen has been practicing as a periodontist in California for more than 20 years. He received his dental degrees (National Taiwan University and Loma Linda University), certificate in Advanced Periodontology (University of Pittsburgh), and PhD in Oral Biology (State University of New York in Buffalo) between 1980-1992. Immediately after attaining the degrees, Dr. Chen was invited to teach at the USC School of Dentistry, where he remains as a full-time faculty member. Dr. Chen is active in clinical and didactic teachings in periodontology as well as in basic science research in microbial pathogenesis. He has more than 70 publications in peer-reviewed journals, and is a past member of the editorial board of the Journal of Dental Research and a reviewer of leading journals in microbiology, dentistry and infectious diseases. A firm believer in the importance of periodontal health, Dr. Chen strives to provide the best possible periodontal care with passion for his patients.

Dorothy Lin Yokoyama D.M.D.

Specialist for Children & Teens

Our child patients and parents like to call our children specialist Dr. Dorothy Lin Yokoyama (Dr. Dory). Although born and raised in Albuquerque, New Mexico, she fell in love with the city of Irvine while attending UC Irvine. She immediately moved back after graduating from Harvard School of Dental Medicine. She then completed her residency in pediatrics dentistry at the University of Southern California in conjunction with Children's Hospital of Orange County and Healthy Smiles of Orange County. Dr. Dorothy is also a Diplomat of the American Board of Pediatric Dentistry. As a mother of 2 baby boys she understands the concerns that you as a parent may have and treats the kids as though they were her own. In her spare time, she enjoys spending time with her family doing water sports at the beach and watching movies. Her goal is not only to treat the active decay but also to enable fearful and/or anxious children and adolescents to cope and have fun in a dental environment.

Lizandy Morales R.D.A.

Lizzie is one of our joyful RDA's here at Spectrum Dental Group and graduated in 2007. It is a delight for her to work along side our Pediatric Specialist. It is a beautiful joy for her to watch our pediatric patients over come their little dental butterflies they experience before their visit. "Watching them feel two inches taller knowing they have bravely completed their appointment, makes me feel so proud of them." Liz exclaims. She has become very creative when educating our patients and helping them understand the importance of a healthy smile! Liz absolutely ENJOYS what she does as an RDA in a multi group practice, and greatly appreciates all of the wonderful patients!

Kimberly Byers R.D.A.

Kimberly grew up in Phoenix, Arizona and moved to Huntington Beach in 2010. She fell in love with dentistry as a young child, growing up her family dentist always made her experiences very enjoyable and fun. Upon moving to California she went to school to become a Registered Dental Assistant and has been practicing since 2012. Kim has a very kind, compassionate, and comforting personality. She is passionate about making our patients feel comfortable and at ease the minute they walk in the door. Kim loves working in an office that provides all aspects of dentistry and especially with our children patients. When she is not in the office she enjoys outdoor activities such as hiking, snowboarding, skateboarding, running and spending time at the park or beach with her dogs.

Katherine Lewis

Dental Hygienist

Katherine obtained her dental hygiene degree from Cerritos College in 2013. She has been in the dental field since 2004 and has previously worked as a registered dental assistant and front office coordinator. She was first attracted to the dental field as a teenager when the change braces made to her smile improved her confidence and self esteem. Her experience made her want to help others achieve the same level of happiness with their smile. She is very passionate about helping people to understand the importance of their oral health and enjoys working with patients to meet their individual needs. Her calm chair-side manner and kind demeanor, in addition to being fluent in English and Spanish, will make you feel very comfortable. Katherine is married and has a young son. She enjoys traveling, camping, hiking, and spending time with her family.

Adriana Ramos

Dental Hygienist

Adriana is a friendly and welcoming person that will be more than happy to answer any of your questions or concerns. She was an RDA with 8 years experience and became a dental hygienists. Driven by self accomplishment and motivated by her love for the dental field, she is a positive individual that is always ready and looking forward to helping you. "There is nothing more rewarding than seeing a beautiful and heart warming smile from a pleased patient." she says, with that in mind she continues to seek knowledge and present her best qualities for our patients. She enjoys hiking, running, and laughing to a good movie.

Jaquelin Morales

Office Administrator

Jackie simply has the most effervescent personality you are ever likely to encounter. This makes her perfectly suited for the extremely important position of Office Administrator. This position is essential to our practice, for she is the Appointment, Insurance, and Billing Coordinator. Jackie has a definite passion for dentistry. She strongly believes a beautiful smile is the start of building self confidence, and to see amazing transformations makes her job very rewarding. She is a natural for this job because she understands how nerve wrecking a dentist visit can be. With her lively, caring smile puts our patients at ease as she welcomes them to our office. If you want to strike up a conversation, just ask Jackie about her nephews who she spoils and loves spending her free time with.