Our Team

Dr. Amir Hassan

Amir joined Colonial Dental Group in 2009.  He enjoys all aspects of dentistry, including endodontics (root canals), general dentistry, oral surgery (extractions) and especially, cosmetic dentistry. Amir is also licensed to administer Nitrous Oxide for those patients fearful of dental care.

Amir grew up in Khartoum, North Sudan in Africa.  Khartoum is the capitol of North Sudan.  He attended the University of Khartoum, where he received his bachelor’s degree in Dental Science in 1997.  He practiced for 2 years prior to moving to the United States. Amir’s wife, Nada is currently in a medical residency program at Hershey Medical Center.  Together they have 2 young sons, Ahmed and Kamal.  Amir loves tennis and swimming, and he is an avid reader.

“Who are the learned? Those who practice what they know”  – Prophet Mohammed

Dr. Pranati Tati  Pranati (pronounced “Pra-NAH-tee”), joined     Colonial Dental Group  in 2009.  Recently she completed an Orthodontic program for general dentists.  She is also well versed in other aspects of dentistry including endodontics (root canals), general dentistry, and cosmetic dentistry. She also is licensed to administer Nitrous Oxide to those patients who are especially nervous or fearful.

Pranati was born in India and raised in Abudhabi.  After coming to America, she enrolled at Boston University where she received her dental degree.  She went on to a General Practice Residency program at Sacred Heart Hospital in Allentown, PA.  Her husband, Chandrakanth, is a software architect.  They have a beautiful and rambunctious little girl named Tarini.

“Love and kindness are the very basis of society.  If we lose these feelings the survival of society will be endangered.”              – Dalai Lama


Dr. Tammy del Sol

Tammy joined her father, Dr. Victor Hajjar in his practice, Colonial Dental Group, in 1995 after graduating from University of Pennsylvania, School of Dental Medicine in Philadelphia.  Tammy took over CDG in 2007 and since then has adopted a “wellness model”, redesigning the waiting room with a more zen feeling, eliminating mercury fillings, adding a mercury-evacuation system which pulls the toxic metal out of the wastewater, and has helped develop a very strong hygiene program.  Tammy understands the vital and fragile relationship between oral health and whole body health.

Her favorite patients are those that come to her afraid and cynical of dental care.  With a little TLC, she believes anyone can come to love and trust their dental family. In her quiet time she enjoys her children and bike riding.  And great movies!

“You must become the change you wish to see in the world.”   – Gandhi


Dr. Daniel L.W. Fishel

Dan joined Colonial Dental Group in 2009.  Dan provides orthodontic and periodontal services here.  Prior to that he had worked for one year at Perio Associates.  Dan has his own practice in Red Lion, as well.  Dan grew up in New Oxford and attended Penn State, studying pre-med. He received his dental degree from Harvard Dental School and went on to University of Pennsylvania, School of Dental Medicine where he received the rare dual Orthodontic/Periodontic degree.  Dan is one of twenty practitioners in the country who have this dual degree.

Dan educates his patients on the best treatments dentistry has to offer, providing orthodontics, periodontics, and dental implants that maximize dental health, longevity and quality of life. Dan’s wife Ashleigh, is also a dentist. Together they have 3 wonderful children – Hannah, Holly, and little Daniel.

“Believe deep down in your heart that you’re destined to do great things.” -Joe Paterno


Dr. Pentti Nupponen

Pentti was born and raised in Helsinki, Finland.  He came to this country as a young man and worked as a carpenter for several years before deciding on a career. He has been practicing dentistry since graduating in 1974 from the University of Pittsburgh, School of Dental Medicine. He started his career with Dr. Victor Hajjar (his brother-in-law).  After several years he opened his own practice in Halifax.

For the past 19 years, Pentti has been practicing holistic and biologic dentistry – this includes his focused attention on patients overall health. Many patients who are very sensitive to various materials and are immuno-compromised in some way have found relief by his treatment and care. He is the former president of the Holistic Dental Association as well as a member and fellow of the IAOMT.  He lectures nationally and internationally. Pentti works with local chiropractors, medical doctors and naturopaths to help bring his patients back to health.  Pentti has been married to Peggy for over 40 years.  They have 3 grown children, Laura, Erik, and Anne, and 1 grandson, Kai.

“Be kind and merciful.  Let no one come to you without leaving as a better person.”  – Mother Teresa