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Our Team Members


Dr. Lassen became the owner of Quest dental in 2019. He earned his Doctor of Dental Surgery degree at the University of Detroit Mercy School of Dentistry where he was honored to receive the Dean’s Circle scholarship award and was voted Class President by his peers.

Dr. Lassen has a long history of humanitarian service in areas such as Ecuador (where he learned to speak Spanish), Guatemala, Detroit, and Washington DC. He also has a passion for clinical excellence and continuing education. Whenever he is not working or spending time with his family, you can bet he is honing his craft to better serve his patients.

Dr. Lassen and his wife, Emily, have two young sons. They enjoy hiking, cooking, and playing classical music together.

Dental Eugene Oregon - LORETTA


Loretta is one of our fantastic dental hygienists; she began with Quest Dental in 2004. She started her career in dentistry as a dental assistant working in specialty offices including endodontics, periodontics and general dentistry. Her goal is to provide each individual client with competent, comprehensive dental hygiene services in a relaxed, caring environment! She is married, has two grown daughters and two beautiful grandkids. Loretta also enjoys spending time quilting, riding her Harley and traveling.


Kayla has been a Dental Assistant for six years. She loves being able to learn about and make a connection with every person that walks through our front door!

When she’s not working, she enjoys exploring the outdoors with her family and two dogs, playing the ukulele, or enjoying new recipes.


Dental Eugene Oregon - MEGAN



Dr. Valentina Serrano
General Dentist

Dr. Valentina Serrano Hill graduated from Universidad Santa Maria, Caracas, Venezuela in 2007. She practiced dentistry for 2.5 years there, before coming to the USA where she studied a master’s degree in biomedical sciences at Barry University, Miami, Florida. She worked in the field of dentistry as an educator for a dental assistant school for several years and later in 2019 went back to school at Tufts University school of dentistry in Boston, Massachusetts, to revalidate her title and be able to practice dentistry. Dr. Serrano is very grateful for all the opportunities she has gotten in the USA and wants to give back to the community by serving people with kindness, compassion and diligence.
Dental Eugene Oregon - TAMMY


Tammy enjoys building relationships with her patients and believes educating people in preventive care is the key to optimal dental health. She strives to provide our patients with the best quality care in a warm family-like atmosphere. She enjoys spending time with her family and friends, her dog Ace, shopping, anything involving music and any outdoor activity.


Stephanie enjoys helping patients feel comfortable and cared for during their dental visits. Stephanie has been married to her best friend, Craig, for 24 years and enjoys watching her two children grow into compassionate people. When she’s not running kids to school and sporting events Stephanie enjoys cooking, crafting, camping and spending time with family and friends.


Danielle began working in the dental field as a dental assistant in 2012. Following the birth of her second child she moved into the front office to continue caring for the members of our community in a different capacity. Danielle is a proud wife and Mom to two rowdy boys. In her spare time she loves hanging out with her family and friends, hiking, the beach, singing karaoke, Ducks football and taking pretty pictures.


Kat has over 20 years of experience in dentistry. Her love of learning keeps her current on the latest prevention strategies to encourage strong, healthy teeth and gums. Coaching patients on individualized home-care techniques and seeing patients of all ages keep her on her toes. Along with coaching patients, Kat and her husband love coaching their three kids in Lacrosse. Spending free time hiking, camping, and exploring the great northwest.




Shelby has worked as a receptionist in the dental field since 2017. After a short break working for an insurance company, she realized she missed the dental field and joined the Quest dental team. Shelby loves building relationships with patients and helping them navigate their dental insurance to make the most of their benefits. When she’s not working, she’s busy outdoors. Shelby loves gardening, hiking, running with her dog and fitness/nutrition.


Kristen has been in the dental field for over 20 years. She always strives to provide exceptional high quality & gentle care to every individual she sees. Kristen is married with 2 wonderful daughters. She enjoys backpacking and traveling adventures with her family, music and taking care of her several pets.

Our Vision

Our Vision

Our mission is to provide the highest quality dental care by our Dentists in Eugene, OR , and create a professional, caring, and comfortable environment. We are confident that our services and the amazing team will exceed your expectations and make you feel right at home.

Our Vision

Our mission is to provide the highest quality dental care by our Dentists in Eugene, OR , and create a professional, caring, and comfortable environment. We are confident that our services and the amazing team will exceed your expectations and make you feel right at home.