Packard, Karen Ann2020-03-042020-03-0419921992(OCoLC)41439740b22400588https://hdl.handle.net/2144/39702PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please log in with a valid BU account to access and click Download. 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.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1992 (Dental Public Health).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.Oral hygieneThesis/Dissertation