Journal article
Fracture resistance and 2-body wear of 3-dimensional-printed occlusal devices.
- Lutz AM Graduate student, Dental Material Unit, Department of Prosthetic Dentistry, Ludwig-Maximilians-University, Munich, Germany.
- Hampe R Research Fellow, Dental Material Unit, Department of Prosthodontics, Ludwig-Maximilians University, Munich, Germany.
- Roos M Senior Statistician, Department of Biostatistics, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.
- Lümkemann N Research Associate, Dental Material Unit, Department of Prosthodontics, Ludwig-Maximilians University, Munich, Germany.
- Eichberger M Dental Technician, Dental Material Unit, Department of Prosthetic Dentistry, Ludwig-Maximilians University, Munich, Germany.
- Stawarczyk B Scientific Head, Dental Material Unit, Department of Prosthodontics, Ludwig-Maximilians University, Munich, Germany. Electronic address: bogna.stawarczyk@med.uni-muenchen.de.
- 2019-01-17
Published in:
- The Journal of prosthetic dentistry. - 2019
Analysis of Variance
Dental Materials
Dental Stress Analysis
Flexural Strength
In Vitro Techniques
Materials Testing
Occlusal Splints
Orthodontic Appliance Design
Polymethyl Methacrylate
Printing, Three-Dimensional
English
STATEMENT OF PROBLEM
Polymeric material for 3-dimensional printing can be used to fabricate occlusal devices. However, information about fracture resistance and wear is scarce.
PURPOSE
The purpose of this in vitro study was to investigate the fracture resistance and 2-body wear of 3-dimensional-printed (3DP) (FotoDent splint; Dreve Dentamid GmbH), milled polymethylmethacrylate (CAM) (Temp Basic; Transpa 95H16, Zirkonzahn GmbH), and conventionally fabricated polymethylmethacrylate (CAST) (Castdon; Dreve Dentamid GmbH) occlusal devices.
MATERIAL AND METHODS
A total of 96 occlusal devices were prepared according to the 3 different manufacturing techniques 3DP, CAM, and CAST (n=32). For each manufacturing technique, specimens were further divided into initial fracture resistance tests (n=16) and artificial aging in the mastication simulator (50 N, 37°C) with 2-body wear followed by fracture resistance tests (n=16). The fracture resistance was determined using a universal testing machine (1 mm/min). The wear was measured after 20 000 and 120 000 mastication cycles with the replica technique, mapped with a laser scanner, and quantified in R software. Data were analyzed using a 2-way ANOVA followed by a 1-way ANOVA with Scheffé or Games-Howell post hoc tests, repeated measures ANOVA with corrected Greenhouse-Geisser P values, and the Levene, Mann-Whitney, and paired t tests (α=.05).
RESULTS
CAM presented higher initial fracture resistance than 3DP or CAST (P<.001). After mastication simulation, CAM followed by 3DP showed higher fracture resistance than CAST (P<.001). Mastication simulation decreased the fracture resistance for CAM and CAST (P<.001) but not for 3DP (P=.78). Three-dimensional-printed occlusal devices showed the highest material volume loss, followed by CAM and the lowest in CAST (P<.001).
CONCLUSIONS
Three-dimensional-printed occlusal devices showed lower wear resistance and lower fracture resistance than those milled or conventionally fabricated. Therefore, only short-term application in the mouth is recommended. Further developments of occlusal device material for 3-dimensional printing are necessary.
Polymeric material for 3-dimensional printing can be used to fabricate occlusal devices. However, information about fracture resistance and wear is scarce.
PURPOSE
The purpose of this in vitro study was to investigate the fracture resistance and 2-body wear of 3-dimensional-printed (3DP) (FotoDent splint; Dreve Dentamid GmbH), milled polymethylmethacrylate (CAM) (Temp Basic; Transpa 95H16, Zirkonzahn GmbH), and conventionally fabricated polymethylmethacrylate (CAST) (Castdon; Dreve Dentamid GmbH) occlusal devices.
MATERIAL AND METHODS
A total of 96 occlusal devices were prepared according to the 3 different manufacturing techniques 3DP, CAM, and CAST (n=32). For each manufacturing technique, specimens were further divided into initial fracture resistance tests (n=16) and artificial aging in the mastication simulator (50 N, 37°C) with 2-body wear followed by fracture resistance tests (n=16). The fracture resistance was determined using a universal testing machine (1 mm/min). The wear was measured after 20 000 and 120 000 mastication cycles with the replica technique, mapped with a laser scanner, and quantified in R software. Data were analyzed using a 2-way ANOVA followed by a 1-way ANOVA with Scheffé or Games-Howell post hoc tests, repeated measures ANOVA with corrected Greenhouse-Geisser P values, and the Levene, Mann-Whitney, and paired t tests (α=.05).
RESULTS
CAM presented higher initial fracture resistance than 3DP or CAST (P<.001). After mastication simulation, CAM followed by 3DP showed higher fracture resistance than CAST (P<.001). Mastication simulation decreased the fracture resistance for CAM and CAST (P<.001) but not for 3DP (P=.78). Three-dimensional-printed occlusal devices showed the highest material volume loss, followed by CAM and the lowest in CAST (P<.001).
CONCLUSIONS
Three-dimensional-printed occlusal devices showed lower wear resistance and lower fracture resistance than those milled or conventionally fabricated. Therefore, only short-term application in the mouth is recommended. Further developments of occlusal device material for 3-dimensional printing are necessary.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1016/j.prosdent.2018.04.007
- PMID 30647000
- Persistent URL
- https://folia.unifr.ch/global/documents/48045
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