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Wear
Study ofStratasys
TrueDent™
DentureTeeth

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Wear Study of Stratasys
TrueDent™ Denture Teeth
To produce long-lasting, aesthetic dentures andtemporaries, an appliance’s polymer materialmust show adequate resistance to wear, which iscaused by a tooth’s contact with antagonist teeth
and food. Wear is a multifactorial phenomenon
and caused by Attrition and Abrasion. Attritionrefers to the wear caused by the direct contact ofantagonist teeth while Abrasion is caused by thesliding action of one tooth across another, withthe force being transmitted through the layers offood.
In 2022, Dr. John A. Sorensen, DMD, PhD,FACP, a professor in the Department ofRestorative Dentistry and Director of Research
for the Graduate Prosthodontics Program atthe University of Washington, conducted astudy on the wear resistance of various denture
teeth, including TrueDent dentures created byStratasys.

100,000 and 200,000 cycles in the OWS, whichis equivalent to 2-years and 4-years of denture
function, respectively. The wear facets wereevaluated by measurement of maximum depth ofwear in the Abrasion region and Attrition regionof the wear facets. The average maximum depthof wear was calculated with ten specimens pergroup of denture tooth material tested.

Results
After 100,000 cycles of Abrasion (Fig 3). andAttrition (Fig 4)., TrueDent was not significantly
different from Ivotion and Rodin Sculpture.
However, it exhibited significantly less wear than
Dentca and Flexera.
Figure 3: Abrasion 100,000 Cycles

This study provides evidence that Stratasys
TrueDent monolithic dentures possess thenecessary wear resistance making them a reliablechoice for permanent and temporary dentures.

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Materials and Method
In the study, Stratasys TrueDent denture teeth
were subjected to testing alongside othercommercially available denture teeth produced
through milling and 3D printing. A prefabricated
IPN denture tooth from Dentsply Sirona wasused as the control group. The primary focus of
the study was to evaluate the wear resistance ofthe denture tooth polymer resulting from attrition
and abrasion.
The study was conducted with an Oral Wear
Simulator (OWS), a machine that simulates bothteeth movements and the oral environment.
By utilizing the OWS, the wear process wasaccelerated, allowing for more efficient evaluation
and analysis.
The wear of the teeth was measured after

Figure 4: Attrition 100,000 Cycles

After 200,000 cycles of Abrasion TrueDent was
not significantly different from Ivotion, Rodin
Sculpture, Flexera, OnX and SR Vivosit. However,it exhibited significantly less wear than Dentca(Fig 5).

3Results
Figure 5: Abrasion 200,000 Cycles

Figure 6: Attrition 200,000 Cycles

At 200K cycle of Attrition TrueDent was similar inwear to the IPN denture tooth and not different
than Dentca, Flexcera, Ivotion, OnX, Rodin
Sculpture, SR Vivosit (Fig 6).

Dr. Sorenson noted that TrueDent, especiallybecause it’s paired with Stratasys PolyJet
technology on the J5 DentaJet 3D printer, isuniquely positioned for marketplace success.

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Table 1. Denture tooth polymer systems tested.
CodeBrand

Manufacturer

Composition

Fabrication
SystemDNT

Denture Tooth Material

DentcaMethacrylate-based

Printed

DPD

Lucitone Digital IPN 3D Premium Tooth

DentsplySirona

photopolymerized resin

PrintedFLX

Flexcera Smile Plus

Desktop HealthethIPN

IPN Denture Tooth

DentsplySirona

Methacrylated oligomers

FactoryIVO

Ivotion - Monolithic with shell geometry

Ivoclar

Crosslinked PMMAMilledONXOnX

SprintRay

Highly cross-linked PMMA
tooth material

Printed

ROD

Rodin Sculpture 3D resin

PacDent

Nanoceramic hybrid

TRU
TRG

TruDent Denture Tooth Material
Version 1. Standard surface
Version 2. Glossy surface

Stratasys Polyjet

Ceramic Nanohybrid Resin

TSN

Trusana

Myerson

VAR

VarseoSmile Crown Plus

Bego

Methacrylated oligomers

Printed

VIV

SR-Vivodent DCL Milling Disk

IvoclarCeramic filled hybrid resin

MilledPrintedPrinted

TrueDent dentures are fabricated with TrueDent resin on the Stratasys J5 DentaJet printer.

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PolyJet Printed

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TrueDent
True Aesthetics Made Possible
TrueDent is a patented FDA cleared (Class II) resin developed for 3D printing of permanent full andpartial dentures and temporary crowns and bridges on the J5 DentaJet platform. It enables batch
production of highly aesthetic, monolithic, multicolor dental appliances on a single mixed part, highcapacity tray.

If you would like to experience
TrueDent dentures firsthand,White Paper

Click here to request a sample.

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