Morphological Comparison of Residual Ridge in Impression for Removable Partial Denture between Digital and Conventional Techniques: A Preliminary In-Vivo Study

Although digital impression using an intraoral scanner (IOS) has been applied for removable partial denture (RPD) fabrication, it is still unclear how the morphology of a residual ridge recorded by digital impression would differ from that recorded by conventional impression. This in vivo study inve...

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Bibliographic Details
Published in:Journal of clinical medicine 2023-11, Vol.12 (22), p.7103
Main Authors: Ishioka, Yurika, Wada, Junichiro, Kim, Eung-Yeol, Sakamoto, Kazuki, Arai, Yuki, Murakami, Natsuko, Yamazaki, Toshiki, Takakusaki, Kensuke, Hayama, Hironari, Utsumi, Miona, Inukai, Shusuke, Wakabayashi, Noriyuki
Format: Article
Language:English
Subjects:
Alveolar process
Clinical medicine
Edentulous
Morphology
Oral mucosa
Partial dentures
Physiological aspects
Product development
Silicones
Teeth
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Summary:Although digital impression using an intraoral scanner (IOS) has been applied for removable partial denture (RPD) fabrication, it is still unclear how the morphology of a residual ridge recorded by digital impression would differ from that recorded by conventional impression. This in vivo study investigated the morphological difference in the recorded residual ridge between digital and conventional impressions. Vertical and horizontal displacements (VD and HD) in residual ridges recorded by digital and conventional impressions were assessed in 22 participants (15 female; mean age 78.2 years) based on the morphology of the tissue surface of in-use RPD. Additionally, the mucosal thickness of the residual ridge was recorded using an ultrasound diagnostic device. VD and HD were compared using the Wilcoxon signed-rank test, and the correlation of mucosal thickness with VD and HD was analyzed using Spearman’s ρ. The VD of digital impression was significantly greater than that of a conventional impression (p = 0.031), while no significant difference was found in HD (p = 0.322). Meanwhile, the mucosal thickness showed no significant correlation with the recorded morphology of the residual ridge, regardless of the impression techniques. It was concluded that the digital impression would result in a greater displacement in the height of the residual ridge from the morphology of in-use RPD than the conventional impression.
ISSN:2077-0383
2077-0383
DOI:10.3390/jcm12227103