Our Mission

Each member of our staff is constantly evolving to better serve your unique needs!

More and more complex decisions about healthcare plans are required by patients, and we know that you need to be able to make a well-informed decision regarding your oral health. To do this successfully, you need a trusted and experienced dentist by your side.
The physicians at our dental office are here to be your personal advocate as we guide you through this process. We take pride in our work and are committed to bringing you a unique, individualized service that raises the bar for the complex world of healthcare.

Our team of specialists, general dentists, assistants, and benefit coordinators are dedicated to making your dental care rewarding, so you'll have a reason to share your smile! We serve patients of all ages, from all backgrounds, and from every walk of life. Our state-of-the-art office has doctors that are highly experienced, professional, and enjoy working with patients of all ages. With Ponderosa Dental Group, you're in very good hands.

Our Team

Dr. Jeff Hwang, DDS, MS Orthodontist

Dr. Jeff Hwang, DDS, MS earned his DDS and MS in Orthodontics from the Loma Linda University School of Dentistry. He loves the esthetic aspect of dentistry, especially orthodontics and believes that changing a person's smile can have such a positive effect on his or her self-esteem. Dr. Hwang is an Assistant Professor at the Loma Linda University School of Dentistry, and outside of the office, he enjoys traveling, playing sports such as volleyball and tennis, scuba diving, cooking and playing the violin.

Dr. David Mashhadian, DDS, MD, FACS Oral and Maxillofacial Surgeon

Dr. David Mashhadian, DDS, MD, FACS earned his MD degree from the Mount Sinai School of Medicine, his DDS degree from the New York University College of Dentistry and his BA degree from Hofstra University. He is a fellow at the American College of Surgeons, ACS the American Academy of Cosmetic Surgery, AACS, the California Academy of Cosmetic Surgery, CACS, the American Association of Oral & Maxillo-Facial Surgeons, AAOMS and the California Association of Oral & Maxillo-Facial Surgeons, CALAOMS. Outside of the office Dr. Mashhadian enjoys volunteering with Smile Generation Day and Thousand Smile.

Dr. Michael Vongphoe, DDS Endodontist

Dr. Michael Vongphoe, DDS attended the University of Southern California. As his patient, he will do his best to treat you like family. This includes a transparent and thorough assessment of your dental issues, a clear discussion of your options and most importantly, a quick and pain-free experience. Dr. Vongphoe is a member of the ADA, CDA and the AAE (American Association of Endodontists). Outside of the office, he enjoys traveling and spending time with his family.

Dr. James H. Ogisaka, DDS General Dentist

Dr. James H. Ogisaka, DDS attended Loyola University’s School of Dentistry. With over 25 years of experience and an emphasis in cosmetic dentistry, he loves to help people smile and take care of themselves. Outside of the office, Dr. Ogisaka enjoys Yoga, Aerobics, Tennis and Skating.

Dr. Romulo Calicdan, DDS General Dentist

Dr. Calicdan attended University of the East College of Dentistry in Manila, Philippines before completing the Orthodontics Success Program Post Graduate Course under Dr. John Witzig and his Comprehensive Esthetic Residency. He then went on to obtain Lumineers Hands on Training, Comprehensive Training in Oral Implantology and Bone Augmentation from Boston Implant Institute and Implant Foundation Training from the Global Institute for Dental Education (gIDE). Dr. Calicdan is a member of the California Board of Dental Examiners, the California Dental Association, the American Dental Association and the American Academy of Implant Dentistry. His dental philosophy is to further advance clinical practice in general and cosmetic dentistry in an environment wherein education, experience, and skills are maximized in full potential.