Impact strength of 3D printed and conventional heat-cured and cold-cured denture base acrylics.
Int J Prosthodont
; 35(2): 240244, 2022.
Article
in En
| MEDLINE
| ID: mdl-33651031
ABSTRACT
PURPOSE:
To evaluate and compare the impact strength of 3D-printed resin to conventionally fabricated denture bases of heat-cured and cold-cured acrylic resin. MATERIALS ANDMETHODS:
Denture base materials were evenly divided into three groups (n = 25 each; N = 75) (1) 3Dprinted material (Denture Base LP, Formlabs); (2) Heat-cured acrylic resin (Lucitone 199, Dentsply Sirona); and (3) cold-cured acrylic resin (Lucitone HIPA, Dentsply Sirona). The 3Dprinted specimens were designed through computer-aided design (CAD) software (Autodesk Meshmixer) with the dimensions 64 mm long, 12.7 mm wide, and 3.2 mm thick, then printed with a desktop stereolithography printer (Form 2, Formlabs). Heat-cured and cold-cured acrylic resin specimens were fabricated through conventional (compression and pouring) methods. The impact energy was read directly from the impact tester in joules, and the cross-sectional area of each specimen was used to calculate the impact strength in kJ/m2. Analysis of variance, Tukey multiple comparisons test, and a likelihood ratio α = .05 were conducted.RESULTS:
The average mean impact strength was 8.9 kJ/m2 for heat-cured acrylic resin, 11.2 kJ/m2 for 3D-printed resin, and 14.9 kJ/m2 for cold-cured acrylic resin. Tukey multiple comparisons test showed that the impact strength for the cold-cured group was significantly greater than the 3D-printed resin and heat-cured acrylic resin groups.CONCLUSION:
Within the limitations of this study, the cold-cured acrylic (Lucitone HIPA) showed the greatest impact strength, followed by 3D-printed resin (Denture Base LP) and conventional heat-cured denture base materials (Lucitone 199), respectively.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Denture Bases
/
Hot Temperature
Language:
En
Journal:
Int J Prosthodont
Journal subject:
ODONTOLOGIA
Year:
2022
Document type:
Article