TY - BOOK AU - Sharif Khattab Hussain Mohamad AU - Khaled Atef Elhayes , AU - Nermeen Hassanien Souror , TI - Rigid versus non - rigid splinting for autotransplantated lower third molar to replace another non - restorable lower molar / PY - 2012/// CY - Cairo : PB - Sharif Khattab Hussain Mohamad , KW - Fracture toughness KW - Heat treatment KW - Y-TZP ceramic N1 - Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Oral and Maxillofacial Surgery; Issued also as CD N2 - The principle aim of this investigation was to evaluate the influence of heat treatment on the fracture toughness and microstructure of yttria - stabilized tetragonal zirconia polycrystals (Y -TZP) substrate . Forty ceramic discs (10-mm x 4-mm ) were prepared from YZ blocks using CAD\CAM technology and divided into four groups according to frequency of the heat treatments , ten samples for each Group UR - http://172.23.153.220/th.pdf ER -