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지안 금
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1 An evaluation of marginal bone level change in single short implant : an 1-year follow up Tae-Hoon Lee, Joo-Hyun Kwon, Sunjai Kim, Chong-Hyun Han Department of Prosthodontics, Kangnam Severance hospital, College of dentistry, Yonsei University, Seoul, Korea Abstract Based on the rapid progress made in research concerning implant fixture designs and surface treatments, modern implant treatments have progressed significantly and are now capable of overcoming anatomical limitations and ensuring a stable prognosis. But for cases where patients suffer severe alveolar bone loss in molar areas, many problems still exist. Therefore, short implants (less than 10mm in fixture length) are increasingly being accepted as an alternative option. In spite of the extensive number of studies reporting high success rates using short implants, there are still many risk factors, including 1) reduced bone-implant contact area and 2) reduced stress distribution around the implant fixture and 3) poor prognosis due to poor bone quality. The present study evaluated marginal bone changes in radiographic images of 40 single short implant cases selected from among 389 short implant cases installed in Yongdong Severance Dental Hospital from Comparisons with standard implants (more than 10mm in length) with 1-year follow up were performed. Additionally, the effects of crown-to-implant ratio in short implants were also evaluated. Keyword : bone-to-implant contact, crown-to-implant ratio, marginal bone, single implant, short implant, standard implant 134 Implantology Vol. 13, No

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original article Tae-Hoon Lee et al: An evaluation of marginal bone level

Implantology 2009 Tae-Hoon Lee et al: An evaluation of marginal bone

3 2009 Tae-Hoon Lee et al: An evaluation of marginal bone level

3 original article Tae-Hoon Lee et al: An evaluation of marginal bone level change in single short implant : an 1-year follow up. Implantology 2009 Tae-Hoon Lee et al: An evaluation of marginal bone level change in single short implant : an 1-year follow up. Implantology Implantology Vol. 13, No Tae-Hoon Lee et al: An evaluation of marginal bone level change in single short implant : an 1-year follow up. Implantology 2009

4 Tae-Hoon Lee et al: An evaluation of marginal bone level change in single short implant : an 1-year follow up. Implantology 2009 Tae-Hoon Lee et al: An evaluation of marginal bone level change in single short implant : an 1-year follow up. Implantology

5 original article Tae-Hoon Lee et al: An evaluation of marginal bone level change in single short implant : an 1-year follow up. Implantology Implantology Vol. 13, No

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7 original article 1. Friberg B, Gröndahl K, Lekholm U. et al. Long-term follow-up of severely atrophic edentulous mandibles reconstructed with short Bränemark implants. Clinical Implant Dent Relat Res 2000;2: Johns RB, Jemt T, Heath R, et al. A multicenter study of overdentures supported by Bränemark implants. Int J Oral Maxillofac Implants1992;7: Fugazzotto PA. Shorter implants in clinical practice: rationale and treatment results. Int J Oral Maxillofac Implants. 4. Tawil G, Younan R. Clinical evaluation of short, machined-surface implants followed for 12 to 92 months. Int J Oral Maxillofac Implants 2003;18: Testori T, Wiseman L, Woolfe S et al. A prospective multicenter clinical study of the Osseotite implant:four-year interim report. Int J Oral Maxillofac Implant. 2001;16: Weng D, Jacobson Z, Tarnow D et al. A prospective multicenter clinical rtial of 3i machined-surface implants : Results after 6 years of followup. Int J Oral Maxillofac Implants 2003;3: Van Steenberghe D, De Mars G, Quirynen M et al. A prospective splitmouth comparative study of two screw-shaped self-tapping pure titanium implant systems. Clin Oral Implants Res 2000;3: Bahat O. Bränemark system implants in the posterior maxilla: clinical study of 660 implants followed for 5 to 12 years. Int J Oral Maxillofac Implants 2000;5: Testori T, Del Fabbro M, Feldman S, et al. A multicenter prospective evaluation of 2-month loaded Osseotite implants placed in the posterior jaws4 : 3-year follow up results. Clin Oral Implants Res 2002;2: Buser D, Mericske-Stern R, Bernard JP, et al. Logn-term evaluation of non-submerged ITI implants. Part 1: 8-year life table analysis of a prospective multi-center study with 2359 implants. Clin Oral implants Res 1997;3: Nedir R, Bischof M, Briaux JM et al. A 7-year life table analysis from a prospective study on ITI implants with special emphasis on the use of short implants. Results from a private practice. Clin Oral Implants Res 2004;2: Arlin ML. Short implants as a treatment option: Results from an observational study in a single private practice. Int J Oral Maxillofac Implants 2006;21; Albrektsson T, Zarb G, Worthington P et al. The long-term efficacy of currently used dental implants : A review and proposed criteria of success. Int J Oral Maxillofac Implants 1986;1: Chaytor DV, Zarb GA, Schmitt A et al. The longitudinal effectiveness of osseointegrated dental implants. The Toronto study: Bone level changes. Int J Periodontics Restorative Dent 1991;11: Jaffin RA, Berman CL. The excessive loss of Branemark fixtures in type IV bone: A five year analysis. J Periodontol 1991;62: das Neves FD, Fomes D, Bernardes SR et al. Short implants An analysis of longitudinal studies. Int J Oral Maxillofac Implants 2006;21: Buser D, Mericske-Stern R, Bernard JP, et al. Long-term evaluation of non-submerged ITI implants. Part 1: 8-year life table analysis of a prospective multi-center study of 2,359 implants. Clin Oral Implants Res 1997;8: Deporter D, Watson P, Pharoah M et al. Five-to-six-year results of a prospective clinical trial using the ENDOPORE dental implant and a mandibular overdenture. Clin Oral Implants Res 1999;10: ten Bruggenkate CM, Asikainen P, Foitzik C et al. Short(6mm) nonsubmerged dental implants : Results of a multicenter clinical trial of 1 to 7 years. Int J Oral Maxillofac Implants 1998;13: Fugazzotto PA, Vlassis J, Butler B. Success and failure rates of 5,526 ITI implants in function for up to 73+ months. Int J Oral Maxillfac Implants 2004;19: Rokni S, Todescan R, Watson P et al. an assessment of crown-to-root ratios with short sintered porous-surfaced implants supporting prostheses in partially edentulous patients. Int J Oral Maxillofac Implants 2005;20: Tawil G, Aboujaoude N, Youman R. Influence of prosthetic parameters on the survival and complication rates of short implants. Int J Oral Maxillofac Implants 2006;21: Implantology Vol. 13, No

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7-2È£ original article OA A comparative study on accuracy of the implant torque devices for screw tightening Hi-Chan Jung 1, Chang-Mo Jeong 2 1 Graduate student, DDS,MSD Dept of Prosthodontic Dentistry, College