Our Doctors


Andrew Rosen, DMD – General Dentist


Dr. Andrew M. Rosen graduated with honors from SUNY Binghamton. He went on to graduate second in his class from the University of Pennsylvania School of Dental Medicine.  For the next four years he worked as an associate for a highly regarded dental practice, learning the fundamentals and details of providing excellent care.  During his time there he developed his philosophy of what patients want most from their dentists: top-quality care in a professional but relaxed environment.

In 1987 Dr. Rosen founded Rose Tree Dental Group where all patients – even those with dental anxiety – could feel comfortable and confident in the care they receive. Rose Tree Dental has since grown to become one of the area’s leading practices, but still maintains the personal touch and friendly atmosphere that set it apart. Dr. Rosen is a member of the American Dental Association, Pennsylvania Dental Association and the Delaware County Dental Society.

Dr. Rosen’s interest go beyond dentistry. He is a founding partner in the Conshohocken Brewing Company which operates several local tap rooms and brew pubs. He currently holds the coveted role of “Chief Taster” for the brewery. For years he played league basketball at the Wynnewood JCC, but after suffering a fourth Achilles tear he hung up his high-tops and put on a bicycle helmet.  He participates in a number of bike rides including the Gran Fondo Cycling Event, a Main Line Animal Rescue fundraiser that his brewery helped organize and co-sponsors.

Main Line Animal Rescue is just one of several organizations Dr. Rosen actively supports.  The others include Habitat for Humanity and Popcorn Park Zoo, a division of the Associated Humane Societies of NJ.

Dr. Rosen and his wife Janet are “empty nesters” living in Wynnewood, PA. They have one son, one daughter, and a grandson named Sammy.


Dr. Stephanie Calora – Pediatric Dentist



Dr. Calora is originally from Edison, New Jersey and is so excited to provide for the dental needs of the community. She graduated from the University of Connecticut in the Biological Sciences and Physiology and Neurobiology program before attending Temple University Kornberg School of Dentistry. She went on to complete her residency at SUNY University in Buffalo, New York before moving to Philadelphia.


More About Dr. Calora

It is Dr. Calora’s passion for working with children and serving her community that initially led her to a career in dentistry. She is a member of both the American Academy of Pediatric Dentistry and the American Dental Association. When she’s not busy working with patients she enjoys traveling, trying new cuisines, and spending time with family and friends.

Dr. Stephanie Calora

Walter Hinman, DMD – General Dentist



A native of Woodbury Heights, New Jersey, after graduating from high school, Dr. Hinman had a career as a carpenter in Philadelphia with Local 1050. Realizing his passion for working with his hands and dentistry, he joined the army and decided to go to dental school in 2008.

Education and Experience

Dr. Hinman attended Rowan University where he earned his B.S in biology and a minor in chemistry. He then attended Temple University Kornberg School of Dentistry where he earned his D.M.D. degree. He went on to serve as a dental officer in the United States Army for 4 years at Fort Bragg, North Carolina. During his time in the army he served on the USNS Comfort, where he provided dental care to underserved populations in South America and the Caribbean.


More About Dr Hinman

Dr. Hinman is a member of the Academy of General Dentistry and the American Academy of Dental Sleep Medicine. In his free time he enjoys woodworking, traveling, experiencing new foods and beers, and spending time with family and friends.

Dr. Calvin K. Lee  – Orthodontist

Dr. Lee is a native of Cheltenham, PA.  He attended NYU and received his B.A. in Biology in 1992.  He then attended the University of Pennsylvania, School of Dental Medicine earning his Doctorate of Dental Dr. LeeMedicine. Dr. Lee graduated amongst the top of his class being received as a member of the Matthew Cryr Honors Society and earning the Crest Award for Excellence in Dentistry for the Elderly and the J. George Coslet Award for Excellence in Periodontics. While working on his degree, he was awarded a scholarship through the U.S. Navy Scholarship program and was commissioned as an officer in the United States Navy.  After receiving his D.M.D. in 1996, Dr. Lee was promoted to the rank of Lieutenant upon which he reported to his duty station at the US Naval Hospital Yokosuka, Japan.

As a Navy dentist, Dr. Lee has been awarded the Navy Commendation Medal, Armed Forces Service Medal and a Meritorious Service Award during his three year tour of duty.  Following his honorable discharge from active duty in 1999, Dr. Lee returned home for his orthodontics specialty training at Temple University, School of Dentistry.  He received both his certificate in orthodontics as well as his Masters Degree in Oral Biology in 2001. Dr. Lee is published in 2003, in the journal of Clinical Orthodontics and Research for his thesis “Perceived long-term prognosis of teeth with orthodontically resorbed roots”.

Dr. Lee has been in private practice as an orthodontist since 2001.  He is a member in the American Association of Orthodontists, the Mid-Atlantic Society of Orthodontists as well as the Greater Philadelphia Society of Orthodontists.

Dr. Lee currently resides in Warrington, PA and is an active member in his church.  He is an avid sports fan, enjoys travel and the culture of big cities, but most of all Dr. Lee enjoys spending time with his wife and three children.

dr calvin lee