We are using cookies to implement functions like login, shopping cart or language selection for this website. Furthermore we use Google Analytics to create anonymized statistical reports of the usage which creates Cookies too. You will find more information in our privacy policy.
OK, I agree I do not want Google Analytics-Cookies
The International Journal of Prosthodontics
Login:
username:

password:

Plattform:

Forgotten password?

Registration

Int J Prosthodont 32 (2019), No. 1     28. Jan. 2019
Int J Prosthodont 32 (2019), No. 1  (28.01.2019)

Page 71-74, doi:10.11607/ijp.5946, PubMed:30677116


Effect of Reduced Material Thickness on Fatigue Behavior and Failure Load of Monolithic CAD/CAM PICN Molar Crowns
Gierthmühlen, Petra / Rübel, Alexander / Stampf, Susanne / Spitznagel, Frank
Purpose: To analyze the effect of material thickness on the fatigue behavior and failure load of monolithic polymer-infiltrated-ceramic-network (PICN) computer-aided design/computer-assisted manufacture (CAD/ CAM) crowns.
Materials and Methods: PICN (VITA Enamic) molar crowns with standard (PICN-ST, 1.5 mm) and reduced (PICN-RED, 1.0 mm) thicknesses were investigated (n = 28). Monolithic zirconia (Z-ST, InCoris TZI) served as control. Failure loads before and after fatigue (1.2 million cycles, 198 N) were evaluated. Data were analyzed pairwise using Wilcoxon rank sum test, and resulting P values were adjusted using the Bonferroni-Holm method, with P < .05 considered significant and a prior power analysis.
Results: All crowns survived fatigue. Mean failure loads before and after fatigue (respectively) were as follows: PICN-ST: 1,889 ± 341 N and 2,547 ± 876 N; PICN-RED: 2,119 ± 338 N and 2,367 ± 719 N; and Z-ST 5,141 ± 1,194 N and 2,531 ± 682 N.
Conclusion: PICN with a reduced thickness of 1 mm appeared to be a reliable CAD/ CAM material for posterior crowns.