At Ponderosa Dental Group in Rancho Cucamonga, CA, our team of skilled dental professionals is committed to providing exceptional care for patients of all ages. With expertise across various specialties, our dentists and specialists work together to ensure your experience is both comfortable and rewarding. Meet the dedicated doctors behind your healthiest, happiest smile.
Dr. Barouir Deirmenjian
Dr. Barouir Deirmenjian is a general dentist dedicated to providing compassionate, high-quality care for patients of all ages. As the founder and CEO of B. Deirmenjian and Affiliates, he oversees multi-specialty facilities across California, including locations in Los Angeles, San Gabriel Valley, Riverside, and San Bernardino counties, with recent expansions into San Diego.
Dr. Deirmenjian earned his Bachelor of Science degree from the University of California at Irvine in 1988 and completed his Doctor of Dental Surgery (DDS) degree at the University of the Pacific Arthur A. Dugoni School of Dentistry in 1999. He is board-certified by the Dental Board of California and an active member of the American Dental Association and California Dental Association.
At Ponderosa Dental Group in Rancho Cucamonga, CA, Dr. Deirmenjian focuses on creating a welcoming environment where patients receive advanced, personalized care.
Fluent in English, Armenian, Spanish, and French, he enjoys the outdoors and contributing to community initiatives, including food drives and pro bono work for underserved populations.
Dr. Jack I Ching Lee
Dr. Jack I Ching Lee is a general dentist at Ponderosa Dental Group who is passionate about creating healthy, beautiful smiles. He earned his DDS degree from Northwestern University in 2001 and completed a general practice residency at Cedars-Sinai Hospital, where he honed his clinical skills.
Dr. Lee values the opportunity to work with a friendly team and connect with patients from diverse backgrounds. His hands-on approach and dedication to improving oral health make him a trusted provider for the Rancho Cucamonga, CA, community.
Outside of dentistry, Dr. Lee enjoys fishing, cooking for friends and family, and playing video games.
Dr. Baktash Amani
Dr. Baktash Amani is a skilled general dentist committed to helping patients achieve optimal oral health through comprehensive, personalized care. He enjoys getting to know his patients and helping them feel confident in their smiles.
Dr. Shahram (David) Mashhadian
Dr. Shahram (David) Mashhadian specializes in oral and maxillofacial surgery at Ponderosa Dental Group. He holds dual degrees, earning his MD from Mount Sinai School of Medicine and his DDS from New York University College of Dentistry. Dr. Mashhadian is a:
- Fellow, American College of Surgeons
- Member, American Academy of Cosmetic Surgery
- Member, American Association of Oral & Maxillo-Facial Surgeons
Dedicated to enhancing patient outcomes, he combines surgical expertise with compassionate care. Dr. Mashhadian also volunteers with programs like Smile Generation Day and Thousand Smile to give back to the community.
Dr. Michael Vongphoe
Dr. Michael Vongphoe is an endodontist at Ponderosa Dental Group known for his transparent communication and patient-focused care. He earned his DDS degree from the University of Southern California and is a member of the:
- American Dental Association
- California Dental Association
- American Association of Endodontists
At the Rancho Cucamonga, CA, office, Dr. Vongphoe takes pride in delivering discomfort-free care while addressing complex dental issues.
In his free time, he enjoys traveling and spending time with his family.
Dr. Hardev Mohinder Singh
Dr. Hardev Singh is a board-certified periodontist with advanced training in periodontal surgery and implant therapy. He earned his dental degree from the University of Pittsburgh School of Dental Medicine and completed residency training at Loma Linda University, where he served as chief resident.
At Ponderosa Dental Group, Dr. Singh emphasizes both surgical and non-surgical periodontal care, helping patients prevent and manage periodontal disease. He also serves as an adjunct faculty member at Western University.
Dr. Singh resides in the Inland Empire with his wife and two children.
Dr. Kevin S. Lee
Dr. Kevin S. Lee specializes in orthodontics and craniofacial development. He earned his DDS and MS in oral biology from UCLA and is certified by the American Board of Orthodontics. Dr. Lee’s passion for orthodontics stems from his fascination with human craniofacial growth and development.
At Ponderosa Dental Group in Rancho Cucamonga, CA, Dr. Lee is dedicated to helping patients achieve straight, healthy smiles through personalized orthodontic care.
When not working, he enjoys soccer, traveling, and driving sports cars.
Dr. Cory Nassoff
Dr. Cory Nassoff provides comprehensive orthodontic care to patients of all ages, helping them achieve straight, confident smiles. He strives to make each patient’s orthodontic journey a comfortable and rewarding experience.
Dr. Afshin Shamaizadeh
Dr. Afshin Shamaizadeh focuses on providing advanced root canal treatments, ensuring patient comfort and excellent results. He takes pride in addressing complex dental needs with precision and care.
