Our Doctors

  • Douglas Delli Colli, DMD

    Dr. Douglas Delli Colli grew up in a small town named Pepperell, MA just south of Nashua, NH. He graduated from the Univeristy of Massachusetts Amherst in 2005 with a...

  • Nichol Irene Penna, DMD

    Dr. Nichol I Penna is a graduate of Thornton Academy, Colby College and Tufts University School of Dental Medicine. It was at Tufts University that she met her future husband...

  • Colette Sirois, DMD

    Dr. Colette Sirois was born and raised in Waterville, Maine.  She pursued her undergraduate studies at Harvard University, earning her bachelor’s degree in history in 1977.  She continued on to...

  • Demitroula Kouzounas, DMD

    Dr. Demitroula Kouzounas is a graduate of Thornton Academy, the University of Maine Orono and Tufts University School of Dental Medicine. She also completed post graduate training at the 86thMedical Detatchment...

  • Joseph G. Penna, DMD

    Dr. Joseph G. Penna is a graduate of Portland High School, the University of Maine Orono, and Tufts University School of Dental Medicine. Dr. Penna completed post graduate training at...