Tinnin, James Martin2020-03-042020-03-0419781978(OCoLC)28516062b19906808https://hdl.handle.net/2144/39762PLEASE 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, 1978 (Endodontics)Includes bibliography (leaves 139-140)This is an investigation of endodontic files from five manufacturers, evaluating the consistency with which they were manufactured, and their adherence to the American Dental Association Specification Nb. 28. The investigation used methods and materials as outlined by the American Dental Association Specification Nb. 28. Statistical inferences were derived from the data that indicated files varied not only among manufacturers, but were quite inconsistently produced within the same manufacturer.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.Dental instrumentsThesis/Dissertation