الفهرس 
Provisional restoration
Stages of restoration designing(Only 14 pages are availabe for public view
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Abstract
Whether cone beam computed tomography (CBCT) scans can be used for the fabrication of computer-aided design and computer-aided manufacturing (CAD–CAM) fixed dental prostheses (FDPs) is not known. Purpose: The purpose of the present study was to evaluate the marginal and internal fit of polymethyl methacrylate(PMMA) restoration fabricated by Cone Beam Computed Tomography versus extra oral scanning techniques. Materials and method: Mandibular right first molar on dental model was prepared. Twenty conventional impressions made using a polyvinylsiloxane (PVS) elastomer for the prepared molar. Impressions for the prepared tooth poured using extra hard dental stone. The models divided for two groups. The 1st group scanned with Extra oral scanner (EOS). The 2nd group scanned with CBCT. Twenty PMMA crowns were designed on virtual casts and milled. The vertical marginal discrepancy (VMD) was measured by U500x Digital Microscope at twelve locations on each abutment. A total of 240 measurements were made at fixed locations in two groups of 20 specimens.