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KMID : 0362420200580020169
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Journal of Korean Academy of Prosthodontics
2020 Volume.58 No. 2 p.169 ~ p.175
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Clinical accuracy of impression technique using digital superimposition of customized abutment with subgingival margin: A case report
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Kim Jin-Wan
Jeong Chang-Mo
Yun Mi-Jung
Lee So-Hyoun
Lee Hyun-Jong
Huh Jung-Bo
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Abstract
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Traditionally, gingival retraction has been performed to obtain customized abutment impressions with subgingival margins of the implant supported prosthesis. However, gingival retraction may have side effects such as gingival recession and bleed, leading to an inaccurate impression. In order to prevent these problems, in this case, the new technique has been introduced; a customized abutment which is designed for superimposition is used. Before the connection of the abutment to the implant fixture, pre-scanned shape data are stored, and then the optical impression without gingival retraction is obtained after connecting to the fixture. The suprastructure is fabricated by superimposing the two data. This technique showed the clinical efficacy of fabricating the implant supported prosthesis with subgingival margin, which satisfied the aesthetics, convenience, and clinically acceptable marginal and internal fit.
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KEYWORD
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Customized abutment, Intraoral scanner, Subgingival margin, Superimposition
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