Influence of rescanning mesh holes and stitching procedures on the complete-arch scanning accuracy of an intraoral scanner: An in vitro study

Gómez‐Polo, Miguel; Piedra‐Cascón, Wenceslao; Methani, Mohammad Mujtaba; Quesada-Olmo, Nieves; Farjas-Abadía, Mercedes; Revilla‐León, Marta

doi:10.1016/j.jdent.2021.103690

Cited by 50 publications

(32 citation statements)

References 43 publications

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“…17,18 The results showed that cutting-out and rescanning methods decreased trueness from 5 to 26 µm and precision from 2 to 150 µm. 17,18 The technique described in the present study did not included cutting-out and intraoral rescanning methods; however, the virtual definitive cast was obtained by correcting the initial intraoral digital scan.…”

Section: Discussionmentioning

confidence: 99%

“…Previous dental literature has evaluated the influence of cutting‐out and rescanning procedures on the accuracy of IOSs devices 17,18 . Both in vitro and in vivo studies have shown how the cutting out of areas of an existing intraoral digital scan with its posterior rescanning technique decreased intraoral scanning accuracy of the IOS system tested 17,18 . The results showed that cutting‐out and rescanning methods decreased trueness from 5 to 26 μm and precision from 2 to 150 μm 17,18 .…”

Section: Discussionmentioning

confidence: 99%

“…17,18 Both in vitro and in vivo studies have shown how the cutting out of areas of an existing intraoral digital scan with its posterior rescanning technique decreased intraoral scanning accuracy of the IOS system tested. 17,18 The results showed that cutting-out and rescanning methods decreased trueness from 5 to 26 µm and precision from 2 to 150 µm. 17,18 The technique described in the present study did not included cutting-out and intraoral rescanning methods; however, the virtual definitive cast was obtained by correcting the initial intraoral digital scan.…”

Section: Discussionmentioning

confidence: 99%

“…The gingival portion and surrounding soft tissues can be difficult to reproduce reliably, especially surrounding mobile teeth 16 . Furthermore, intraoral digital scanning includes stitching procedures that occurs during the merging of the images captured by the IOS 17,18 . When fabricating long‐span tooth‐supported prostheses, a great number of overlaps and stitching techniques must be performed to obtain the complete‐arch scan by the IOS software which can lead to lower scanning accuracy or higher dimensional discrepancies 19 …”

mentioning

confidence: 99%

“…16 Furthermore, intraoral digital scanning includes stitching procedures that occurs during the merging of the images captured by the IOS. 17,18 When fabricating long-span tooth-supported prostheses, a great number of overlaps and stitching techniques must be performed to obtain the complete-arch scan by the IOS software which can lead to lower scanning accuracy or higher dimensional discrepancies. 19 The purpose of the double-step putty-light body conventional impression technique is to capture the tooth preparation details on the light body impression material, provide a uniform light body impression material thickness, and minimize the dimensional change due to the polymerization contraction of the impression material.…”

mentioning

confidence: 99%

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Intraoral Digital Scans for Fabricating Tooth‐Supported Prostheses Using a Custom Intraoral Scan Body

Gómez‐Polo

Revilla‐León

Limones

et al. 2021

Journal of Prosthodontics

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This article describes a technique to assist with intraoral digital scans for fabricating tooth-supported prostheses by using a custom intraoral scan body when the extension of the scan or the clinical characteristics might compromise the reliability of the intraoral digital scan. A preliminary intraoral scan of the tooth preparations is used to design a custom intraoral scan body which is manufactured using polymethylmethacrylate and a 5-axis milling machine. A low-viscosity polyvinyl siloxane impression of the tooth preparations is obtained using the custom intraoral scan body. Subsequently, the custom intraoral scan body is digitized using an intraoral scanner. A design software program is used to align the digitized custom intraoral scan body with the preliminary intraoral scan to obtain the definitive virtual cast. This technique aims to reduce manual conventional laboratory procedures such as pouring dental impression or die trimming which might minimize inaccuracies on the virtual definitive cast.

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