Short answer
When designing implant-supported prosthetics, consider cobalt-chromium as a cost-effective and dimensionally accurate material option for CAD/CAM milled frameworks, while being mindful of potential minor differences in vertical fit compared to titanium.
- Field
- Final Production
- Source
- Journal of Clinical and Experimental Dentistry (2020)
- Method
- Comparative experimental study using optical microscopy.
- Sample
- 33 frameworks (17 Co-Cr, 16 Ti)
- Evidence
- Moderate effect
Cobalt-chromium frameworks produced via CAD/CAM milling demonstrate dimensional accuracy suitable for clinical application, performing similarly to titanium counterparts in terms of fit. This final production research insight is drawn from a 2020 study published in Journal of Clinical and Experimental Dentistry. Using Comparative experimental study using optical microscopy. with 33 frameworks (17 Co-Cr, 16 Ti), researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing implant-supported prosthetics, consider cobalt-chromium as a cost-effective and dimensionally accurate material option for CAD/CAM milled frameworks, while being mindful of potential minor differences in vertical fit compared to titanium.
CAD/CAM milled Co-Cr frameworks offer clinically acceptable passive and vertical fit comparable to titanium.
Cobalt-chromium frameworks produced via CAD/CAM milling demonstrate dimensional accuracy suitable for clinical application, performing similarly to titanium counterparts in terms of fit.
Journal of Clinical and Experimental Dentistry · 2020
Key Findings
- 01Cobalt-chromium frameworks exhibited clinically acceptable passive and vertical fit.
- 02There were no statistically significant differences in passive fit between Co-Cr and Ti frameworks.
- 03Titanium frameworks showed significantly better vertical fit in the screwed implant position compared to Co-Cr (p = 0.046).
Application
Design takeaway
When designing implant-supported prosthetics, consider cobalt-chromium as a cost-effective and dimensionally accurate material option for CAD/CAM milled frameworks, while being mindful of potential minor differences in vertical fit compared to titanium.
How to apply
When selecting materials for CAD/CAM milled dental frameworks, evaluate the specific fit requirements of the restoration and compare the performance data of available alloys like Co-Cr and Ti.
Project actions
- 01When choosing materials for a design project, research their physical properties and how they perform in real-world applications.
- 02Consider the manufacturing process (like milling) and how it might affect the final product's accuracy and fit.
Method & Evidence
Variables
Strengths & Limitations
Strengths
- +Direct comparison of two relevant materials using a standardized manufacturing technique.
- +Quantitative measurement of fit using optical microscopy.
Limitations
The study was limited to specific types of dental frameworks and may not be generalizable to all implant-supported prosthetics. The testing conditions were controlled and might not fully replicate the complexities of a live clinical environment.
Reliability & validity
The study's validity is supported by the use of standardized measurement techniques (optical microscopy) and statistical analysis. Reliability is enhanced by testing multiple samples and considering different implant positions.
Think critically
To what extent do the observed differences in vertical fit between Co-Cr and Ti impact long-term clinical outcomes and patient satisfaction, and could these differences be mitigated through design or post-processing adjustments?
Design Principles
"Material selection for subtractively manufactured prosthetics should balance performance metrics (e.g., fit, strength) with manufacturing feasibility and cost-effectiveness."
This research provides valuable data for designers and manufacturers considering material selection for implant-supported prosthetics. It suggests that Co-Cr is a viable alternative to titanium, potentially offering cost or aesthetic advantages without compromising the critical fit of the final restoration.
What This Means for Your Design
This study looked at how well two different metals, cobalt-chromium and titanium, fit when made into dental bridges using computer-controlled milling. Both metals worked well enough for patients, but titanium was slightly better at fitting perfectly in one specific way.
How to use in your project
- 1.Reference this study when discussing the selection of materials for a prosthetic or precision-engineered component, particularly if comparing metal alloys for subtractive manufacturing.
Add to My Project
Quick Cite
Paragraph starter
This research indicates that cobalt-chromium (Co-Cr) frameworks produced via CAD/CAM milling offer clinically acceptable passive and vertical fit, performing comparably to titanium (Ti) frameworks. While Ti showed a statistically significant advantage in vertical fit under specific testing conditions (p = 0.046), the overall dimensional accuracy of Co-Cr suggests it is a viable material choice for implant-supported fixed partial dentures, potentially offering alternative aesthetic or economic benefits without compromising critical fit.
Source
Journal of Clinical and Experimental Dentistry
Analysis of fit on implants of chrome cobalt versus titanium frameworks made by cad / cam milling
journal · 2020
View sourceQuestions About This Research
- What does the research say about cad/cam milled co-cr frameworks offer clinically acceptable passive and vertical fit comparable to titanium?
- When designing implant-supported prosthetics, consider cobalt-chromium as a cost-effective and dimensionally accurate material option for CAD/CAM milled frameworks, while being mindful of potential minor differences in vertical fit compared to titanium. Evidence: Journal of Clinical and Experimental Dentistry (2020).
- Why does "CAD/CAM milled Co-Cr frameworks offer clinically acceptable passive and vertical fit comparable to titanium." matter for design?
- This research provides valuable data for designers and manufacturers considering material selection for implant-supported prosthetics. It suggests that Co-Cr is a viable alternative to titanium, potentially offering cost or aesthetic advantages without compromising the critical fit of the final restoration.
- How can designers apply this research?
- When designing implant-supported prosthetics, consider cobalt-chromium as a cost-effective and dimensionally accurate material option for CAD/CAM milled frameworks, while being mindful of potential minor differences in vertical fit compared to titanium.
- What were the main findings?
- Cobalt-chromium frameworks exhibited clinically acceptable passive and vertical fit.. There were no statistically significant differences in passive fit between Co-Cr and Ti frameworks.. Titanium frameworks showed significantly better vertical fit in the screwed implant position compared to Co-Cr (p = 0.046).
- What research method was used?
- Comparative experimental study using optical microscopy. with 33 frameworks (17 Co-Cr, 16 Ti).
- How strong is the evidence?
- Evidence strength is rated Moderate effect, based on a 2020 journal from Journal of Clinical and Experimental Dentistry.
- What should I do differently in my next project?
- When selecting materials for CAD/CAM milled dental frameworks, evaluate the specific fit requirements of the restoration and compare the performance data of available alloys like Co-Cr and Ti.
- What are the limitations?
- The study focused on 3-unit FPDs; results may differ for frameworks of different spans or complexities. The 'screwed' vs. 'non-screwed' implant distinction might not fully represent all clinical scenarios.