6Matherne RP, Angelopoulos C, Kulild JC,etal.Use of cone- beam computed tomography to identify root canal systems in vitro[J].J Endod 2008,34(1):87-89.
7Palomo JM, Rao PS, Hans MG. Influence of CBCT exposure conditions on radiation dose [J].Oral Surg Oral Med Oral Pathol 2008,105:773-782.
5Tsumta A, Yamada K, Hanada K, et al. Thickness of the roof of the glenoid fossa and condylar bone change: a CT study[J]. Dentomaxillofac-Radiol, 2003, 32(4): 217-221.
5Feijo CV, Lucena JG, Kurita LM, et al. Evaluation of cone beam computed tomography in the detection of horizontal periodontal bone defects: an in vivo study[J].Int J Periodontics Restorative Dent, 2012,32(5 ) :e162-168.
6Vandenberghe B, Jacobs R, Yang J.Detection of periodontal bone loss using digital intraoral and cone beam computed tomography images: an in vitro assessment of bony and/or infrabony defects[J].Dentomaxillofac Radiol, 2008, 37 ( 5 ): 252-260.
7Mengel R, Candir M, Shiratori K, et al. Digital volume tomography in the diagnosis of periodontal defects: an in vitro study on native Pig and human mandibles[J].J Periodontol,2005, 76 ( 5 ) :665 -673.
8Osborn J, Stohenberg J, Huso B, et al. Comparison of measurement variability using a standard and constant force periodontal probe[J].J Periodontol, 1990,61 ( 8 ) :497 -503.
9Mombelli A, Graf H.Depth-forcc-patterns in periodontal probing [J].J Clin Periodontol, 1986,13(2):126-130.
