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In vivo trueness of...
In vivo trueness of full-arch implant-supported CAD/CAM restorations and models based on conventional impressions
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- Nedelcu, Robert (författare)
- Uppsala universitet,Odontologi & Maxillofacial kirurgi
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Olsson, Pontus (författare)
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Thulin, Måns (författare)
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- Nyström, Ingela, 1967- (författare)
- Uppsala universitet,Bildanalys och människa-datorinteraktion
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- Thor, Andreas (författare)
- Uppsala universitet,Odontologi & Maxillofacial kirurgi,Oral & Maxillofacial Surgery
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(creator_code:org_t)
- Elsevier, 2023
- 2023
- Engelska.
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Ingår i: Journal of Dentistry. - : Elsevier. - 0300-5712 .- 1879-176X. ; 128, s. 104381-104381
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Objectives: To evaluate a method for in situ reference acquisition of implant positions in complete edentulous maxillae using an industrial scanner. To assess in vivo trueness of full-arch implant-supported fixed dentures (IFD) and dental models based on conventional impressions.Methods: In five subjects, scan-bodies were mounted to six maxillary implants and scanned three times using an industrial scanner (REF). Original impression-based models used to manufacture existing IFDs, (MOD1), and models fabricated from new polyether impressions, (MOD2), were scanned three times with a laboratory scanner. Scan-bodies were aligned and exported with analogue positions corresponding to implant positions. Implant analogues were mounted onto existing IFDs and scanned three times (BRIDGE). CAD files of scan-bodies with inter-aligned CAD-analogues were geometry-aligned to REF. CAD-analogues were aligned to exported files of MOD1 and MOD2, and to BRIDGE. Resulting six CAD-analogues were Globally Aligned using a consistent geometry-based alignment. Deviations were computed after a Reference Point System Alignment at the implant/prosthetic platform for Cartesian axes and a linear Resultant.Results:REF precision was 9.3 ± 1 µm. In vivo trueness for Resultant was MOD1: 36±16 µm, MOD2: 28±7 µm and BRIDGE: 70±23 µm, where MOD1 and MOD2 were statistically significantly different from BRIDGE. In vitro manufacturing trueness of Resultant when MOD1 acted reference for BRIDGE was: 69 ± 22.Conclusions: This method can be applied for assessing in vivo trueness. CAD/CAM processed IFD showed deviations twice that of impression-based models, however, errors from impressions and subsequent model scans were not additive to the entire workflow.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Odontologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Dentistry (hsv//eng)
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- ref (ämneskategori)
- art (ämneskategori)
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