Welcome to
Dental Associates of Diamond Bar
Orthodontic Services
Periodontic Services
Protect gum health with advanced periodontal treatments focused on disease prevention, stability, and long-term oral wellness.
Dental Implant Surgery

Oral Surgery Services
Address complex dental needs through expert oral surgery focused on safety, comfort, and predictable healing outcomes.

Maxillofacial Surgery Services
Correct jaw and facial conditions using advanced surgical techniques to restore balance, function, and facial harmony.

Endodontic Services
Relieve pain and save natural teeth with specialized endodontic care focused on infection removal and preservation.
About Us
We believe exceptional outcomes come from specialization, collaboration, and clear communication. Whether you’re referred by your general dentist or seeking advanced dental care, you can feel confident knowing your treatment is handled by experts who work together with your long-term health in mind.
Why Choose Dental Associates of Diamond Bar
Patient-Centered Communication
Advanced Techniques & Technology
Collaborative Treatment Planning
Meet Our Doctors
Dr. Andrew Lee
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Dr. Andrew Lee originally pursued a career in engineering, earning a Bachelor of Science degree in Computer Science and Engineering from UCLA. After receiving braces as an adult and experiencing firsthand the powerful impact a confident smile can have, he decided to change careers and pursue dentistry.
Dr. Lee attended dental school at UCSF, followed by an orthodontics residency at Columbia University. A San Francisco native, he is also a lifelong San Francisco Giants fan. Dr. Lee is dedicated to providing excellent care and clear communication for all of his patients, with a special soft spot for Dodgers fans — all in the spirit of giving everyone something to smile about.
Dr. Lari
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She completed a three-year postdoctoral residency at UCLA, where she specialized in Periodontics and Dental Implant Surgery and conducted extensive research in genetics and periodontal disease. A VOLPE Prize winner and recipient of the WSP Resident Research Award, Dr. Lari remains committed to evidence-based care. She also serves as clinical faculty at UCLA School of Dentistry and actively pursues continuing education. Outside the office, she enjoys traveling and spending time with family and friends.
Dr. Patam
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She completed her oral and maxillofacial surgery training at UCLA, gaining comprehensive experience in orthognathic jaw surgery, facial reconstruction, dental and maxillofacial implantology, cosmetic facial surgery, and anesthesia. Dr. Patam also earned her medical degree from UCLA School of Medicine and is a Diplomate of the American Board of Oral and Maxillofacial Surgery. Her background allows her to manage complex surgical cases with precision and care.
Dr. Anthony J. Guerrero, DDS
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Dr. Guerrero has been in private practice since 2001 and is an active member of several professional organizations, including the American Association of Endodontists and the American Dental Association. He has published research in the Journal of the American Dental Association and serves as a lecturer and clinical faculty member at UCLA School of Dentistry, contributing to the education of future dental professionals.