34- Does Printer Type Change 3D Orthodontic Results
Show notes
3D printing has revolutionized orthodontics, but not all printer settings are equal. A study by Favero et al. reveals unexpected insights into model accuracy.
- Study Overview: Analyzed how printer type and layer height affect orthodontic model accuracy.
- Key Findings: 100 micron layer height resulted in the most accurate models. Jewel 3D printer exhibited the smallest average deviation. All tested printers were within clinical limits.
- Clinical Implication: Finer layers don't guarantee better accuracy; 100 micron is both effective and time-efficient.
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Show transcript
00:00:00: You'd be surprised how the tiniest print setting can change the accuracy of your three D models.
00:00:05: Hey guys, Three-D printing has transformed orthodontics but not all printers or layer heights deliver.
00:00:15: Today we'll break down how printer type and layer thickness affect model accuracy, why those small settings matter more than you might think.
00:00:28: The paper by Favera and colleagues published in the American Journal of Orthodontics and Identificial Orthopedics, in twenty seventeen examined how print layer height and printer type influence the accuracy.
00:00:44: three-dimensional printed orthodontic models.
00:00:48: The authors from the University of Texas used a single master STL file on an ideal maxillary arch produced eighty four identical models.
00:01:00: Thirty six models were printed with a form-to-stereolithography printer using three different layer heights, twenty five fifty and one hundred microns.
00:01:10: The other forty eight was produced by four different commercial printers Jewel Three D Objered Eden two hundred sixty V vector three SP and Envision Tech Vida.
00:01:24: Each printed model was scanned with a three-shape R. seven hundred desktop scanner, and the resulting file was digitally superimposed onto the original STL using geomagic control software.
00:01:37: Deviations greater than plus or minus zero point two five millimeters were considered beyond clinical tolerance.
00:01:44: The data where analyzed statistically With one way ANOVA end to key post hoc testing.
00:01:53: Now the results were quite revealing.
00:01:57: Contrary to what we might expect, the Causes print setting a one hundred micron layer height produced most accurate models with an average deviation of only zero point zero point six four millimeters.
00:02:09: The twenty five microns setting which should theoretically have offered best resolution was actually the least accurate Among printer types, the JURA-DD showed the smallest average deviation while the Form II printer had the fewest total points outside of tolerance range.
00:02:27: Importantly all printers produced models well within clinically acceptable limits meaning that for orthodontic applications every system tested was accurate enough.
00:02:38: The clinical implication is straightforward Printing with a finer layer height does not necessarily improve dimensional accuracy.
00:02:47: In fact, it may increase the risk of cumulative error due to greater number layers and polymerization inconsistencies.
00:02:55: And as a practical bonus – The one hundred micron setting reduced print time dramatically from around fifteen hours at twenty five microns To about four-and-a half hour at one hundred microns for same models.
00:03:08: From methodological standpoint this is robust experimental study.
00:03:14: The bias potential is low and the statistical design is appropriate.
00:03:18: Of course, it's a laboratory setup based on one geometry in one resin system so that results can't be generalized to every printer or material.
00:03:27: Still – conclusion consistent clinically meaningful.
00:03:31: For us as orthodontists this message is both liberating and practical.
00:03:36: You don't need chase the finest possible layer resolution.
00:03:43: Even a moderately priced printer running at standard, one hundred micron resolution can produce diagnostic and working models that are dimensionally reliable.
00:03:52: And clinically sound.
00:03:54: so when selecting a three D printer think beyond layer height consider build volume cost service print speed and workflow integration accuracy as this study demonstrates is already sufficient across most systems.
00:04:13: Thanks for watching!
00:04:14: I'm Dr.
00:04:14: Martin Baxman, let's bring science back to orthodontics.
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