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치조정 골흡수에 대한 platform switching이 미치는 영향
Influence of platform switching on crestal bone resorption

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Authors
Kim, Do-Young; Kim, Tae-Il; Seol, Yang-Jo; Lee, Yong-Moo; Ku, Young; Rhyu, In-Chul; Chung, Chong-Pyoung; Han, Soo-Boo
Issue Date
2008
Publisher
대한치주과학회
Citation
대한치주과학회지 2008;38:135-142
Keywords
dental implantsmarginal bone lossplatform switching
Abstract
Purpose: Numerous studies have shown that crestal bone resorption around the implant was related to the location of
the implant abutment junction(IAJ). Recently it was hypothesized that platform switching termed the inward horizontal
repositioning of the IAJ might limit bone resorption around the implants. The purpose of this clinical study was to
evaluate the effect of platform switching on crestal bone resorption.
Materials and Methods: The crestal bone loss of 65 external hex implants in 26 patients were radiographically
measured at crown placement and follow-up examinations. 23 standard implants(non-platform switching group, NP)
were connected with the matching abutments and 42 wide implants(platform switching group, PS) were connected with
the 1 mm smaller diameter abutments.
Results: There was significant difference of crestal bone loss between NP group and PS group. For implants in the
NP group, mean crestal bone loss was 1.18±0.68 mm at crown placement and 1.42±0.41 mm at follow-up. The meal
bone loss in PS group was 0.47±0.52 mm at crown placement and 0.60±0.65 mm at follow-up. When the crestal
bone changes according to placement depths of implants were compared, subcrestal position of IAJ had a significantly
less bone loss in PS group, but it was not in NP group.
Conclusion: Within the limits of the present study, it was concluded that platform switching technique might decrease
crestal bone loss around the implants. Additionally, when the IAJ of implant was placed 1 mm deeper in the alveolar
bone, the effect of platform switching on bone loss was enhanced.
ISSN
2093-2278
Language
Korean
URI
http://hdl.handle.net/10371/74275
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College of Dentistry/School of Dentistry (치과대학/치의학대학원)Dept. of Dentistry (치의학과)Journal Papers (저널논문_치의학과)
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