Short answer

When designing or selecting 3D printing solutions for dental models, prioritize technologies and processes proven to meet the specific precision demands of the target workflow, rather than relying on a single 'clinically acceptable' standard.

Field: Modelling
Source: Journal of Clinical Medicine (2020)
Method: Systematic Review and Meta-Analysis (though meta-analysis was not possible).
Evidence: Moderate effect

While most 3D printed full-arch dental models meet general clinical accuracy standards, their suitability differs significantly based on the specific application, such as orthodontics versus prosthodontics. This modelling research insight is drawn from a 2020 study published in Journal of Clinical Medicine. Using Systematic review and meta-analysis (though meta-analysis was not possible)., researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing or selecting 3D printing solutions for dental models, prioritize technologies and processes proven to meet the specific precision demands of the target workflow, rather than relying on a single 'clinically acceptable' standard.

Study

ModellingHigh ImpactModerate effect

3D Printed Dental Models Achieve Clinically Acceptable Accuracy, But Workflow-Specific Precision Varies

Journal of Clinical Medicine · 2020

Key Findings

013D printed dental models generally achieve clinically acceptable accuracy for many applications.
02Accuracy varies widely, from <100 μm to >500 μm, depending on the printing technology and parameters.
03Stereolithography (SLA) and Digital Light Processing (DLP) are the most common technologies investigated.
04Manufacturing parameters (layer thickness, base design, post-processing, storage) significantly impact model accuracy.
05Models suitable for orthodontics may not be accurate enough for prosthodontic workflows.

Application

Design takeaway

How to apply

When developing a new 3D printing process for dental models, conduct rigorous testing to quantify accuracy across different workflows (e.g., orthodontic vs. prosthodontic) and benchmark against established standards for each.

Project actions

01When evaluating 3D printing technologies for your design project, research the typical accuracy ranges for different methods (e.g., FDM, SLA, SLS).
02Consider how factors like material choice, print settings (layer height, infill), and post-processing (sanding, curing) might affect the final accuracy of your 3D printed components.

Method & Evidence

AimTo systematically review and evaluate the accuracy of full-arch dental models produced using various 3D printing technologies.

MethodSystematic Review and Meta-Analysis (though meta-analysis was not possible).

ProcedureA comprehensive search of seven databases was conducted to identify studies on the accuracy of 3D printed full-arch dental models. Twenty-eight studies meeting the inclusion criteria were analyzed, focusing on reported accuracy metrics and influencing factors.

ContextDental modelling and additive manufacturing.

Variables

IV["3D printing technology (e.g., SLA, DLP, FDM)","Manufacturing parameters (e.g., layer thickness, print speed, material)","Post-processing methods"]

DV["Accuracy of the 3D printed model (e.g., deviation from the digital model, dimensional error in μm)"]

CV["Type of model (full-arch dental model)","Digital scanning method used to create the original model","Measurement tools used to assess accuracy"]

Strengths & Limitations

Strengths

+Comprehensive literature search across multiple databases.
+Inclusion of a significant number of studies (28) for analysis.
+Identification of key factors influencing model accuracy.

Limitations

The cost of high-precision 3D printers and specialized measurement tools can be a barrier. The environmental conditions during printing and storage can also affect accuracy.

Reliability & validity

The reliability of the findings is moderate due to the heterogeneity of the included studies, which prevented a meta-analysis. Validity is supported by the systematic review methodology, but the quality of the original studies varied.

Think critically

How might the 'clinically acceptable' accuracy threshold differ between a patient's first consultation for orthodontic assessment versus the fabrication of a custom implant abutment?

Design Principles

"Workflow-specific accuracy validation is essential for additive manufacturing in precision-critical fields."

This insight is crucial for designers and engineers developing or specifying 3D printing technologies for dental applications. It highlights the need to understand the precision requirements of different dental workflows to select appropriate printing methods and materials, ensuring the final models are fit for purpose and avoid costly errors.

What This Means for Your Design

3D printed teeth models are usually good enough for doctors, but sometimes they need to be super-duper precise for certain jobs, like making crowns, and not all 3D printers can do that.

How to use in your project

1.Use this research to justify the selection of a specific 3D printing technology for your design project, explaining how its accuracy meets the project's requirements.
2.Discuss the potential limitations of 3D printing accuracy in your design and how you mitigated them.

Add to My Project

Quick Cite

Paragraph starter

The systematic review by Etemad-Shahidi et al. (2020) highlights that while 3D printed dental models generally achieve clinically acceptable accuracy, their precision varies significantly based on the printing technology and the specific workflow requirements. For instance, models deemed suitable for orthodontic applications may not possess the necessary accuracy for complex prosthodontic procedures. This underscores the importance of selecting additive manufacturing technologies and parameters that align with the precise demands of the intended application to ensure functional integrity and avoid design failures.

Source

Journal of Clinical Medicine

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

journal · 2020

View source

Questions About This Research

What does the research say about 3d printed dental models achieve clinically acceptable accuracy, but workflow-specific precision varies?: When designing or selecting 3D printing solutions for dental models, prioritize technologies and processes proven to meet the specific precision demands of the target workflow, rather than relying on a single 'clinically acceptable' standard. Evidence: Journal of Clinical Medicine (2020).
Why does "3D Printed Dental Models Achieve Clinically Acceptable Accuracy, But Workflow-Specific Precision Varies" matter for design?: This insight is crucial for designers and engineers developing or specifying 3D printing technologies for dental applications. It highlights the need to understand the precision requirements of different dental workflows to select appropriate printing methods and materials, ensuring the final models are fit for purpose and avoid costly errors.
How can designers apply this research?: When designing or selecting 3D printing solutions for dental models, prioritize technologies and processes proven to meet the specific precision demands of the target workflow, rather than relying on a single 'clinically acceptable' standard.
What were the main findings?: 3D printed dental models generally achieve clinically acceptable accuracy for many applications.. Accuracy varies widely, from <100 μm to >500 μm, depending on the printing technology and parameters.. Stereolithography (SLA) and Digital Light Processing (DLP) are the most common technologies investigated.. Manufacturing parameters (layer thickness, base design, post-processing, storage) significantly impact model accuracy.
What research method was used?: Systematic Review and Meta-Analysis (though meta-analysis was not possible)..
How strong is the evidence?: Evidence strength is rated Moderate effect, based on a 2020 journal from Journal of Clinical Medicine.
What should I do differently in my next project?: When developing a new 3D printing process for dental models, conduct rigorous testing to quantify accuracy across different workflows (e.g., orthodontic vs. prosthodontic) and benchmark against established standards for each.
What are the limitations?: Heterogeneity and unclear reporting in the reviewed studies prevented a meta-analysis. The definition of 'clinically acceptable accuracy' can vary.