Our Team

Dr. Daniel Tseng attended the Columbia University, School of Engineering for his undergraduate degree before going to dental school at the University of Connecticut, from which he graduated in 2000. He continues his education and training regularly, and has completed over 600 hours of continuing education since his graduation. Dr. Tseng has received advanced training in CEREC same-day dentistry, Diode soft tissue lasers, Solea® hard tissue lasers, Invisalign® clear aligners and Zoom teeth whitening. He has practiced in the Danbury area for over 20 years.

Dr. Tseng is a member of several professional dental organizations, including the American Dental Association® and the Academy of General Dentistry. He has been nominated for America’s Best Dentist by the National Consumer Advisory Board, and is a member of the national Industrial Engineering Honor Society and the National Dental Honor Society (Connecticut Chapter).

As a dentist, he is committed to educating his patients about their oral health and to providing the best possible care for them. Dr. Tseng also provides free dental care to veterans from Dental Lifeline Network, and volunteers for the Connecticut Mission of Mercy to provide dental care to the underserved population of the area. He also provided free dental care to youth in the juvenile correction center form 2009 to 2011.

Outside of the office, Dr. Tseng loves to travel, hike and ski.

Dr. Hassan earned her Doctor of Dental Medicine degree from the Boston University Henry M. Goldman School of Dental Medicine. She is an active member of the American Dental Association and was inducted into the Omicron Kappa Upsilon National Dental Honor Society in recognition of her academic excellence and commitment to the field of dentistry.

Dr. Hassan is passionate about creating a collaborative environment where patients feel informed, comfortable, and confident in their care. She believes in clear, compassionate communication and takes pride in educating patients about their oral health so they can make decisions that align with their goals. With a strong focus on comprehensive and preventive care, she is dedicated to helping patients achieve long-term oral health and lasting, vibrant smiles.

Outside of the office, Dr. Hassan enjoys hiking, reading, and spending time with her family and friends.

Dr. O’Shea is an experienced general dentist with over 33 years of clinical practice, serving patients in Connecticut for the past three decades. He earned his Doctor of Dental Surgery degree from the University of Maryland School of Dentistry and completed his residency training at the National Naval Medical Center in Bethesda, Maryland.

Throughout his career, Dr. O’Shea has remained committed to advancing his clinical expertise through ongoing education in areas such as treatment planning, cosmetic dentistry, dental lasers, and periodontal care. He integrates modern techniques and evolving technologies into his practice to deliver high-quality, personalized care for each patient.

Dr. O’Shea finds the most fulfillment in serving patients in a meaningful and creative way. He values the individuality of each patient and approaches every case with focus and dedication, striving to meet both functional and aesthetic goals. He believes dentistry should be a collaborative experience and aims to share his knowledge in a way that aligns with each patient’s needs and expectations.

He is continually inspired by patients who prioritize their oral health, recognizing that dental care can sometimes feel overwhelming. His goal is to create a supportive, comfortable environment where patients feel confident taking steps toward long-term health.

A Connecticut resident with deep roots in the Northeast, Dr. O’Shea values personal growth and service. Outside of the office, he enjoys traveling to new destinations, pursuing learning opportunities, and spending time outdoors in nature.

Dr. O’Shea looks forward to helping you achieve and maintain a healthy, confident smile.