Digital versus conventional workflow for the fabrication of physical casts for fixed prosthodontics: A systematic review of accuracy

Parize, Hian; Tardelli, Juliana Dias Corpa; Bohner, Lauren; Sesma, Newton; Múglia, Valdir Antônio; Reis, Andréa Cândido dos

doi:10.1016/j.prosdent.2020.12.008

Cited by 34 publications

(36 citation statements)

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“…A recent systematic review concluded that the accuracy of digital workflow for a fixed dental prosthesis was similar to conventional protocols. It was emphasized that the quality of the scanned data was critical for determining the accuracy of the additively manufactured casts [20]. Therefore, the validity of a digital impression can be questioned, particularly in cases with multiple types of restorations and prosthetics.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Accuracy of Different Dental Restorative Materials between Intraoral Scanning and Conventional Impression-Taking: An In Vitro Study

et al. 2021

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The properties of underlying substrates influence the quality of an intraoral scan, but few studies have compared the outcomes using common restorative materials. In this study, we aimed to compare the accuracy of digital and conventional impressions recorded for four different dental materials as the substrates. Experimental crowns were produced with a metallic surface (gold or cobalt-chromium alloy (Co-Cr)) or without a metallic surface (zirconia or PMMA (polymethyl methacrylate)). A conventional impression was made in the conventional group (CON group), and gypsum models were subsequently scanned with a tabletop scanner. An intraoral scanner was used to scan the crowns either after applying a powder spray to reduce the surface reflectivity (IOS-P group) or without the powder spray (IOS group). The scans were assessed in three dimensions for precision and trueness. The accuracy did not differ between the CON and IOS groups for the non-metallic crowns. However, it was statistically different for the Co-Cr metallic crown, reducing trueness observed between groups as CON > IOS > IOS-P. The study evidences the differences in outer surface accuracy observed with a change in the substrate material to be imaged using an oral scanner and with the impression method. These findings suggest that the restoration material present in the oral cavity should be considered when selecting an impression-taking method.

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Section: Introductionmentioning

confidence: 99%

A Comparison of Accuracy of Different Dental Restorative Materials between Intraoral Scanning and Conventional Impression-Taking: An In Vitro Study

et al. 2021

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“…In completely and partially dentate patients, virtual diagnostic casts can be acquired by using intraoral scanners (IOSs). [38][39][40][41] However, in completely edentulous patients, the accuracy of intraoral digital scans remains questionable and conventional techniques have been recommended. [42][43][44] Furthermore, dental professionals can impact the scanning accuracy of IOSs through awareness and management of operator variables that can reduce IOS accuracy such as the technology and system selected, [45][46][47] ambient light illuminance conditions, [48][49][50] scanning protocol, 51,52 operator experience, 53,54 surface characteristics being scanned, [46][47][48][49][50][51][52][53][54][55][56][57] extension of the digital scan, 48,58 and postprocessing methods.…”

Section: Clinical Protocol For Virtual Patient Integration Without a ...mentioning

confidence: 99%

Additively Manufactured Scan Bodies for Virtual Patient Integration: Different Designs, Manufacturing Procedures, and Clinical Protocols

Pérez-Giugovaz¹,

Meykadeh

Revilla‐León

2022

Journal of Prosthodontics

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Additively manufactured intraoral scan bodies can be used to guide the alignment of a patient's digital file information, including facial and intraoral digital scans both with and without a cone beam computed tomography scan, and to obtain a 3D virtual patient's representation. The present manuscript reviews the different intraoral scan body designs, procedures involved in additive manufacturing, clinical protocols for fabricating an additively manufactured scan body, performing a patient's digital data collection, and completing the alignment techniques.

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“…Working models are mandatory for the fabrication of manually veneered FDPs that are indicated for cases with challenging aesthetic demands. Therefore, all analog, digital, and partial digital workflows still require physical working models [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Hard dental stone models poured from conventional impressions are considered the gold standard for constructing dental models [ 21 ]. However, the conventional workflow for obtaining stone models is time-consuming, labor-intensive, and may incorporate many errors as a result of the multiple clinical and laboratory procedures needed [ 19 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Different CAD/CAM Milling and 3D Printing Digital Fabrication Techniques on the Accuracy of PMMA Working Models and Vertical Marginal Fit of PMMA Provisional Dental Prosthesis: An In Vitro Study

et al. 2022

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Background: Minimal evidence exists on the efficacy of different digital manufacturing techniques in the fabrication of precise dental working models and provisional prosthesis. Aim of study: The objective was to evaluate the effect of two digital fabrication techniques (CAD/CAM milling and 3D printing) on the accuracy of PMMA working models and marginal fit of PMMA provisional prosthesis. Materials and methods: Two abutment teeth of modified typodont were prepared. A reference stone model was fabricated, and an optical impression was performed to obtain a CAD reference model. Four CAM milled working models and four printed working models were fabricated. CAD software was used to design the provisional prostheses. Group A tested four milled provisional prosthesis, and group B tested four 3D printed prosthesis. The 3D accuracy of working models was assessed by superimposition of the control reference working model on the CAD test working model. A stereo-optical microscope was used to assess vertical marginal fit of the provisional dental prosthesis. Student’s t and Mann–Whitney U tests were utilized to compare the two groups. Results: Results showed no statistically significant difference between the two tested groups. Conclusion: The two digital working model fabrication techniques recorded comparable accuracy. Similarly, 3D printed provisional prosthesis showed comparable marginal fit to the CAD/CAM milled ones.

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Digital versus conventional workflow for the fabrication of physical casts for fixed prosthodontics: A systematic review of accuracy

Cited by 34 publications

References 50 publications

A Comparison of Accuracy of Different Dental Restorative Materials between Intraoral Scanning and Conventional Impression-Taking: An In Vitro Study

A Comparison of Accuracy of Different Dental Restorative Materials between Intraoral Scanning and Conventional Impression-Taking: An In Vitro Study

Additively Manufactured Scan Bodies for Virtual Patient Integration: Different Designs, Manufacturing Procedures, and Clinical Protocols

Effect of Different CAD/CAM Milling and 3D Printing Digital Fabrication Techniques on the Accuracy of PMMA Working Models and Vertical Marginal Fit of PMMA Provisional Dental Prosthesis: An In Vitro Study

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