Santopolo, John L.2023-03-242023-03-2419781978https://hdl.handle.net/2144/45926PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.Thesis (M.Sc.D.)--Boston University, School of Graduate Dentistry. Dept. of Endodontics, 1978.Includes bibliography: leaves 79-84.An in-vitro investigation to study the effect and movement of paraformaldehyde incorporated in Sargenti's paste has been designed and carried to completion. With the aid of C14 labelled paraformaldehyde, the rate of flow of formaldehyde from the set paste was found to decrease with time, approaching zero after approximately 30 days. Following that time period, further release of formaldehyde could only be observed if the paste started to dissolve.en-USThis work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.PolymersFormaldehydeThesis/Dissertation