Accuracy of printed casts generated from digital implant impressions versus stone casts from conventional implant impressions: A comparative in vitro study

Alshawaf, Bahaa; Weber, Hans‐Peter; Finkelman, Matthew; Rafie, Khaled El; Kudara, Yukio; Papaspyridakos, Panos

doi:10.1111/clr.13297

Cited by 50 publications

(64 citation statements)

References 28 publications

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“…Excluded studies either did not assess full-arch dental model [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ] or were not published in English [ 28 , 29 , 30 ]. Three additional studies were later removed as they assessed and compared the accuracy of different intraoral scanners [ 5 , 31 , 32 ]. In addition, one study [ 33 ] was excluded as it was a published abstract.…”

Section: Resultsmentioning

confidence: 99%

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Etemad-Shahidi

Qallandar

Evenden

et al. 2020

JCM

120

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The use of additive manufacturing in dentistry has exponentially increased with dental model construction being the most common use of the technology. Henceforth, identifying the accuracy of additively manufactured dental models is critical. The objective of this study was to systematically review the literature and evaluate the accuracy of full-arch dental models manufactured using different 3D printing technologies. Seven databases were searched, and 2209 articles initially identified of which twenty-eight studies fulfilling the inclusion criteria were analysed. A meta-analysis was not possible due to unclear reporting and heterogeneity of studies. Stereolithography (SLA) was the most investigated technology, followed by digital light processing (DLP). Accuracy of 3D printed models varied widely between <100 to >500 μm with the majority of models deemed of clinically acceptable accuracy. The smallest (3.3 μm) and largest (579 μm) mean errors were produced by SLA printers. For DLP, majority of investigated printers (n = 6/8) produced models with <100 μm accuracy. Manufacturing parameters, including layer thickness, base design, postprocessing and storage, significantly influenced the model’s accuracy. Majority of studies supported the use of 3D printed dental models. Nonetheless, models deemed clinically acceptable for orthodontic purposes may not necessarily be acceptable for the prosthodontic workflow or applications requiring high accuracy.

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Section: Resultsmentioning

confidence: 99%

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Etemad-Shahidi

Qallandar

Evenden

et al. 2020

JCM

120

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“…Any digital impression is generating a STL file that is further used within the whole digital workflow for virtual design and physical manufacturing of interim PMMA crowns [29][30][31][32][33]. It was found that throughout the digital flow cumulative error may arise from the optical impression to the manufacturing stage that lead to volumetric discrepancies in final milled or printed dental pieces [29,33].…”

Section: Resultsmentioning

confidence: 99%

Additive vs. Subtractive CAD/CAM Procedures in Manufacturing of the PMMA Interim Dental Crowns. A Comparative in vitro Study of Internal Fit

Earar¹,

Popa²,

Iliescu³

et al. 2020

Rev. Chim.

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CAD/CAM procedures are increasingly used to the manufacturing of 3D-designed PMMA interim dental crowns. The aim of this in vitro study was to compare the internal fit of interim PMMA crowns fabricated by subtractive versus additive CAD/CAM procedures. Starting from a Co-Cr CAD/CAM master abutment model, 20 standardized dental models of dental stone were done by double impression technique. Subsequently two groups of interim PMMA interim crowns, each of them having 10 specimens, were CAM obtained either by milling or 3D printing, using Exocad software package, milling machine Rolland DWX-50, and the 3D printer MoonRay S 100 respectively. An electronic digital caliper Powerfix Profi+ was used for measurements of the chrome cobalt abutment and crowns inner diameter in 4 directions (mesial-distal gingival, buccal-lingual gingival, mesial-distal occlusal, and buccal-lingual occlusal). The null hypothesis that the internal dimensional accuracy of interim PMMA crowns fabricated by DLP additive method would not be different compared to those obtained by milling procedure was rejected since the printed PMMA interim crowns were more accurate. This study concluded that the milled PMMA interim crowns show larger internal dimensional variations than the 3D printed ones. However, the fit variation among interim crowns fabricated by both procedures was statistically non significant, so that both CAM technologies may be equally used in manufacturing process.

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“…There are, at the same time, some reports in the literature that are different from the results of the present study. For example, Alshawaf et al, (2018) [5] mention that, when performing fixed prosthetic restorations supported by dental implants in case of Kennedy's Class II edentations, the printed models generated after intraoral scanning have an inferior accuracy to the conventional gypsum models made after an open-tray impression. Ji-Young Sim [16] publishes a study according to which 3D printed models have a lower accuracy compared to conventional ones.…”

Section: Resultsmentioning

confidence: 99%

“…A few years ago, laboratory scanning (extraoral scanning/EO) proved to provide better accuracy for dental models than intraoral scanning/IO [1]. Even relatively recently, in the years 2017/2018, the scientific literature reported that the conventional method / traditional impression technique was still the "best solution" for performing large prosthetic restorations, respectively for fixed prosthetic restorations of the entire arch, supported on natural teeth or implants [2][3][4][5].…”

mentioning

confidence: 99%

Comparative Study on Two Methods Used in Obtaining 3D Printed Dental Models

Pantea¹,

Ciocoiu²,

Țâncu³

et al. 2019

Mat.Plast.

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The purpose of this study was to assess the accuracy of two 3D printed dental models manufactured after intraoral/IO and extraoral/EO scanning. A dental study model (KaVo Dental GmbH/Germany) was used as a reference for this research; this model was scanned with an industrial scanner (XT H 225 ST/Industrial CT scan/Nikon Metrology Inc./U.S.A.) and a reference STL file was generated (coded M1). Two 3D printed models (Form2/FormLabs Inc./U.S.A.) were produced via IO scanning (TRIOS 3 Battery Cart/3 Shape/Denmark), respectively via EO scanning (Swing Dental Scanner/Dof Inc./South Korea) of the reference dental model. The 3D printed models obtained were scanned with the industrial scanner, resulting in other two STL files (coded M2, respectively M3). All the STL files obtained (reference M1; M2; M3) were compared in pairs, using a 3D analysis software. Good results were achieved in obtaining 3D printed dental models via IO or EO scanning, yet, the 3D printed dental model obtained via IO scanning (M3) showed slightly improved dimensional compatibility with the reference model (M1) in comparison with the 3D printed dental model manufactured via EO scanning (M2).

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Accuracy of printed casts generated from digital implant impressions versus stone casts from conventional implant impressions: A comparative in vitro study

Abstract: Printed casts generated from digital impressions for partially edentulous posterior mandibular arches had inferior accuracy to conventional stone casts fabricated from splinted open tray impressions. The printed casts from WL IOS had better accuracy compared to AWST IOS.

Cited by 50 publications

References 28 publications

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Accuracy of 3-Dimensionally Printed Full-Arch Dental Models: A Systematic Review

Additive vs. Subtractive CAD/CAM Procedures in Manufacturing of the PMMA Interim Dental Crowns. A Comparative in vitro Study of Internal Fit

Comparative Study on Two Methods Used in Obtaining 3D Printed Dental Models

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