00512nam a22001337a 4500020002000000020002000020082001700040100004200057245003000099260007900129300003300208500005100241650008600292  a1556645538 (hb)  a8178671026 (hb)  a617.643bPRO  aProffit, William R. aHenry W. Fields10aContemporary orthodontics  aSt. Louis, MissouribMosby, Inc.bA Harcourt Health Sciences Companyc2000  ax, 742 p.b: ill. c; 28 cm.  aIncludes bibliographical references and index.  aOrthodonticsvEtiologyvLimitationsvBiomechanicsvMechanicsvPreadolescentvIIDC