Accuracy of complete-arch digital implant impression with or without scanbody splinting: An in vitro study

Pozzi, Alessandro; Arcuri, Lorenzo; Lio, Fabrizio; Papa, Andrea; Nardi, Alessandra; Londono, Jimmy

doi:10.1016/j.jdent.2022.104072

Cited by 37 publications

(40 citation statements)

References 25 publications

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“…This reduces the number of required appointments and most importantly allows for implant data acquisition in the edentulous mandible which has been reported to be problematic. [3][4][5][6][7][8][9][10] The fact that 44 out of 50 3D-printed prosthesis prototypes presented with acceptable fit highlights the limitations with 3D printing full-arch prototypes that may include the resin being used, the nesting orientation of the STL file, and the post-processing procedures. The same STL files were used for both milling and 3D printing, yet 88% fit was achieved with 3D printing compared to 100% fit with milling.…”

Section: Discussionmentioning

confidence: 99%

“…Clinical implications from these findings can be drawn that accurately fitting digitally fabricated prosthesis prototypes can be milled after extraoral scanning with reverse scan bodies skipping implant data acquisition with intraoral scanning. This reduces the number of required appointments and most importantly allows for implant data acquisition in the edentulous mandible which has been reported to be problematic 3–10 . The fact that 44 out of 50 3D‐printed prosthesis prototypes presented with acceptable fit highlights the limitations with 3D printing full‐arch prototypes that may include the resin being used, the nesting orientation of the STL file, and the post‐processing procedures.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12] Full-arch digital implant scans for completely edentulous patients are techniquesensitive procedures mainly due to the absence of anatomical landmarks such as teeth, making the superimposition of scans with scan bodies and interim prostheses challenging. [1][2][3][4][5][6] The double digital scanning technique with the use of fiducial markers has been introduced for complete digital workflow for prosthesis prototype fabrication. 2 Fiducial markers are used to aid in data acquisition during edentulous jaw intrao-ral scanning and to assist in the merging of multiple digital scans.…”

mentioning

confidence: 99%

“…Full-arch digital implant scanning with intraoral scanners (IOS) for the fabrication of prosthesis prototypes and definitive zirconia implant fixed complete dental prostheses (IFCDPs) is gaining popularity. [1][2][3][4][5][6][7][8][9][10][11][12] Full-arch digital implant scans for completely edentulous patients are techniquesensitive procedures mainly due to the absence of anatomical landmarks such as teeth, making the superimposition of scans with scan bodies and interim prostheses challenging. [1][2][3][4][5][6] The double digital scanning technique with the use of fiducial markers has been introduced for complete digital workflow for prosthesis prototype fabrication.…”

mentioning

confidence: 99%

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Reverse scan body: A complete digital workflow for prosthesis prototype fabrication

Papaspyridakos

Bedrossian

Kudara

et al. 2023

Journal of Prosthodontics

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Purpose To assess the accuracy of fit of prosthesis prototypes fabricated via a complete digital workflow protocol with a reverse scan body skipping intraoral scanning for implant data acquisition. Materials and methods A maxillary stone cast with four multiunit abutment implant analogs (Screw‐Retained Abutments, Institut Straumann AG, Basel, Switzerland) with adequate anteroposterior spread simulated a common clinical patient situation. This stone cast served as the master cast and an interim screw‐retained prosthesis was fabricated on it. Novel reverse scan bodies were connected to the interim prosthesis, and extraoral scanning was performed with a white light intraoral scanner. The produced standard tessellation language (STL) files were then imported to computer‐assisted design software and after the digital design, the STL file was exported to a computer‐assisted machining milling machine and a three‐dimensional (3D) printer to produce a total of 50 milled and 50 printed fixed complete denture prototypes, respectively. Two clinicians assessed the accuracy of fit of each digitally fabricated prosthesis prototype on the master cast, utilizing the screw‐resistance test and radiographic evaluation. Out of the 100 prototypes, 94% (94/100) were fitting accurately. Fisher's exact test was used to test the difference among the groups. The test revealed statistically significant results (p = 0.027). Results Out of the 50 digitally fabricated milled prosthesis prototypes, 50 (100%) presented with accurate fit under in vitro assessment. Out of the 50 digitally fabricated 3D printed prototypes, 44 (88%) presented with accurate fit under in vitro assessment. Conclusions Accurately fitting digitally fabricated prosthesis prototypes can be milled after extraoral scanning with reverse scan bodies without intraoral implant data acquisition.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Reverse scan body: A complete digital workflow for prosthesis prototype fabrication

Papaspyridakos

Bedrossian

Kudara

et al. 2023

Journal of Prosthodontics

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“…This is the first clinical study reporting outcomes with different scan body shapes, indicating that the data acquisition and subsequent merging with cylindrical scan bodies were significantly more accurate than the outcomes with polygonal ones. Previous in vitro research has indicated that the scan body shape effects accuracy, but recommendations on shape design have been inconclusive 16–22 . It has been reported that shorter scan bodies with fewer undercuts may be easier to scan, process, and digitize.…”

Section: Discussionmentioning

confidence: 99%

Complete digital workflow for prosthesis prototype fabrication with double digital scanning: A retrospective study with 45 edentulous jaws

Papaspyridakos

Vazouras

Gotsis

et al. 2023

Journal of Prosthodontics

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Purpose To assess the accuracy of fit of complete‐arch printed prosthesis prototypes generated with a digital workflow protocol for completely edentulous jaws. Materials and methods Forty‐five edentulous jaws (35 patients) underwent intraoral complete‐arch digital scans with the double digital scanning (DDS) technique and the generated standard tessellation language (STL) files were superimposed and imported into computer‐aided design software. After STL merging, each master STL file was used for printing a prosthesis prototype. The primary outcome was the accuracy of fit assessment of the printed prototypes on verified master stone casts. Two experienced clinicians tested the accuracy of fit with radiographs and screw‐resistance tests. Secondary outcomes were the effect of the scan body shape and implant number on the accuracy of fit. Results Out of the 45 DDS‐generated prosthesis prototypes, 39 presented with accurate fit on verified master stone casts, yielding an 86.70% accuracy of fit. Cylindrical scan bodies led to 100% accuracy of fit (25/25), whereas polygonal scan bodies presented with 70% accuracy of fit (14/20). Four implant‐supported prostheses yielded 100% accuracy of fit (12/12), compared with 25/29 (86.30%) accuracy of fit for the six‐implant‐supported ones. Fisher's exact test was used to assess the effect of different scan body shapes (p = 0.005) and implant number on accuracy of fit. Chi‐squared test was used to assess the association between the number of implants per arch and the accuracy of fit (p = 0.039). Conclusions Thirty‐nine out of 45 complete‐arch prosthesis prototypes generated with a completely digital workflow presented with clinically acceptable fit. The effect of the scan body design and implant number was statistically significant, favoring cylindrical scan bodies and four‐implant‐supported prostheses.

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Effect of a Novel ‘Scan Body’ on the In Vitro Scanning Accuracy of Full-Arch Implant Impressions

Zhang,

Yang,

et al. 2024

International Dental Journal

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Accuracy of complete-arch digital implant impression with or without scanbody splinting: An in vitro study

Cited by 37 publications

References 25 publications

Reverse scan body: A complete digital workflow for prosthesis prototype fabrication

Reverse scan body: A complete digital workflow for prosthesis prototype fabrication

Complete digital workflow for prosthesis prototype fabrication with double digital scanning: A retrospective study with 45 edentulous jaws

Effect of a Novel ‘Scan Body’ on the In Vitro Scanning Accuracy of Full-Arch Implant Impressions

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