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Grassi & Grassi P.C. is the oldest-established, continuously-operating Endodontic practice in Monroe County.  Our unblemished record of care and commitment is the foundation of our success.  

Staff members are employees of long standing, and each is personable with a genuine appreciation of your concerns.  They exude confidence so that all are comfortable and secure in our services.

Your needs are priority number one at Grassi & Grassi where patient care, gentleness and excellence are not only words but expectations.

Emergency treatment is available when it's needed at either of our two convenient locations. Our offices are open from 7:30 a.m. to 4:30 p.m. Monday through Friday.

Please take a minute to view our staff who have over the years been photographed at various area landmark restaurants.


Our Practitioners

When you visit our office, you will find a dedicated staff of professionals using the latest procedures and cutting edge technology to care for you. Our doctors are deeply involved in local activities, also. Please review the detailed backgrounds of our caring practitioners below.

Dr. John De Angelo graduated from New York University School of Dental Medicine. After graduation, he completed a two-year general practice residency at Nassau County Medical Center where he also completed his Endodontic training. He joined Grassi and Grassi, P.C. in 1982 and he has been a partner for many years. Dr. DeAngelo is a Board Certified Endodontist and belongs to many local and national dental organizations.

Dr. Michael D. Grassi received his Dental Degree from SUNY at Buffalo School of Dental Medicine and completed both his residency in Endodontics and his Masters Thesis at the University of Pittsburgh School of Dental Medicine. Dr. Grassi is a Board Certified Endodontist, a fellow of the American College of Dentists, the International College of Dentists and the Pierre Fauchard Academy. He is the Section Head in Endodontics for the Eastman Institute for Oral Health as well as an Assistant Professor at the University of Rochester School of Medical Dentistry. In addition, he was a clinical Assistant Professor at SUNY at Buffalo School of Dental Medicine and is a consultant in the Dental Department at St. Mary's Hospital and Park Ridge Hospital. He served as Past President of the following: The Seventh District Dental Society, Monroe County Dental Society, Rochester Dental Study Club and the Apollonian Dental Study Club. Dr. Grassi has spoken locally and nationally on all aspects of Endodontics. He is also an active member in a number of community and civic organizations.


Proud Members of

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A dentist who specializes in root canal treatment is called an Endodontist. This procedure is performed to remove damaged tissue from inside the root canals of a tooth. Endodontists limit their practice to performing these specialized endodontic procedures.

Advanced surgical and nonsurgical skills are necessary to qualify a dentist for Endodontics. This makes them uniquely qualified to treat the routine and complex cases each individual patient presents. After attending a qualified dental school, a dentist wishing to specialize in Endodontics attends a two or three year advanced dental school program. This intensive education prepares them to perform the very best in Endodontic procedures. Additionally, they continue to update and manage their training after entering into practice to keep knowledgeable about state-of-the art procedures and technology.

All About Endodontics

Endodontics is the branch of dentistry which is concerned with the morphology, physiology and pathology of the human dental pulp and periradicular tissues. The study and practice of Endodontics encompasses the basic clinical sciences including biology of the normal pulp; the etiology, diagnosis, prevention and treatment of diseases and injuries of the pulp; and associated periradicular conditions.

The scope of endodontics includes, but is not limited to, the differential diagnosis and treatment of oral pain of pulpal and/or periradicular origin; vital pulp therapy, such as pulp capping and pulpotomy; nonsurgical treatment of root canal systems with or without periradicular pathosis of pulpal origin and the obturation of these root canal systems; selective surgical removal of pathologic tissues resulting from pulpal pathosis; repair procedures related to such surgical removal of pathologic tissues; intentional replantation and replantation of avulsed teeth; surgical removal of tooth structure, such as root-end resection, hemisection, bicuspidization and root resection; root-end filling, endodontic implants; bleaching of discolored dentin and enamel; retreatment of teeth previously treated endodontically; and treatment procedures related to coronal restorations by means of post and/or cores involving the root canal space.

Emergency treatment is available whenever it's needed.

Hours: Our offices are open from 7:30 a.m. to 4:30 p.m. Monday through Friday.





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