Related Experiment Video
Updated: Feb 10, 2026
Micro 3D Printing Using a Digital Projector and its Application in the Study of Soft Materials Mechanics
Published on: November 27, 2012
Compressive and flexural strength of provisional crown materials fabricated by conventional and 3D printing
Nandini R D1, Nirupama R1, Chetan Hegde1
1Department of Prosthodontics, NITTE Deemed to be University, A B Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India, 575018.
Purpose:
To compare the mechanical properties of the new 3D Accuprint C&B resin against both conventional and other 3D-printed resins to determine its viability for provisional crown fabrication.
Materials And Methods:
Three materials were selected for comparison: GC Tempron (conventional), 3D Accuprint C&B, and Freeprint Temp (3D-printed resins). Fifteen cylindrical specimens (6 mm × 4 mm) were prepared from each material for compressive strength testing, and fifteen rectangular specimens (25 mm × 2 mm × 2 mm) were fabricated for flexural strength testing as per the manufacturer's instructions. Testing was performed using a universal testing machine. The recorded compressive and flexural strength values were statistically analyzed after confirming normality (Shapiro-Wilk test) and homogeneity (Levene's test). All statistical analyses were conducted using IBM SPSS Statistics software (version 25), with the level of significance set at p < 0.05. Data were analyzed using one-way ANOVA with Tukey's HSD test.
Results:
Significant intergroup differences were found for both compressive and flexural strength (p < 0.001). GC Tempron showed significantly lower values compared with both 3D printed materials (p < 0.001). Freeprint Temp and 3D Accuprint did not differ significantly (compressive strength, p = 0.84; flexural strength, p = 0.15).
Conclusions:
3D Accuprint C&B demonstrated superior mechanical strength compared to GC Tempron and comparable properties to Freeprint Temp. These findings confirm its mechanical viability as a high-performance alternative, making it better suited for durable provisional restorations, particularly in cases involving high resistance to stress, parafunctional habits, or implant-supported prostheses.
Related Concept Videos
01:30Relation Between Tensile Strength and Compressive Strength of Concrete
02:36Crown Ethers
01:16Flexural Stress
Hooke's Law states that within the material's elastic limits, stress is directly proportional to strain. In a member experiencing a bending moment, the strain at any point is relative to its distance...
03:05Acid Strength and Molecular Structure
In the absence of any leveling effect, the acid strength of binary compounds of hydrogen with nonmetals (A) increases as the H-A bond strength decreases down a group in the periodic table. For group 17, the order of increasing acidity is HF < HCl < HBr < HI. Likewise, for group 16, the order of increasing acid strength is H2O < H2S < H2Se < H2Te. Across a row in the periodic table, the acid strength of binary hydrogen compounds increases with increasing...
01:30Sign Convention
The normal force acts perpendicular to the beam's cross-section and can...
01:20Strength of Cement
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...