3Atassi F. Periimplant Probing: Positives and Negatives. Implant Dentistry, 2002, 11 (4): 356 ~ 62.
4Lekholm U, Adell R, Lindhe J, et al. Marginal tissue reactions at osseointegrated titanium fixtures. A cross-sectional retrospective study. Int J Oral Maxillofac Surg, 1986, 15:53~ 61.
5Eickholz P, Grotkamp LF, StevelingH, et al. Reproducibility of peri-implant probing using a force-controlled probe. Clin Oral Impl Res, 2001,12:153~158.
6Truhlar R, Morris H, Ochi S, et al. Stability of the bone-implant complex. Results of longitudinal testing to 60 months with the Periotest device on endosseous dental implants. Ann Periodontol, 2000,5(1):42~55.
7Faulkner M G, Giannitsios D, Lipsett AW, et al.The use and abuse of the Periotest for 2-piece implant/abutment system. Int J Oral Maxillofac Impl, 2001,16(4):486~94.
8svenson B, palmqvist S. Imaging of dental implants in severely resorbed maxillae using detailed narrow - beam radiography, A meathodological study. Dentomaxillofac radiol , 1996, 25(2):67~70.
9Woo BM, Zee KY, Chan FH, et al. In vitro calibration and validation of a digital subtraction radiography system using scanned images. J of Clin Periodontol, 2003, 30(2): 114~ 8.
10Andren Mombelli . Microbiology and antimicrobial therapy of peri - implantitis. Periodontology 2000, 2002,28: 177~189.