The influence of cervical collar height on the compressive strength of CAD/CAM zirconia-ceramic restora-tion / 实用口腔医学杂志
Journal of Practical Stomatology
;
(6): 161-164, 2014.
Artículo
en Chino
| WPRIM
| ID: wpr-445220
ABSTRACT
Objective:
To evaluate the influence of cervical collar height on the compressive strength of CAD/CAMzirconia-ceramic restoration.Methods:
Zirconia cores were manufactured and divided into 5 groups (n =1 0)based on the cervical collar height(mm)0.0(A),1 .0(B),1 .5(C),2.0(D)and 2.5(E).After veneered with porcelain,all the samples were cemented on the metal tooth analog and then mounted in an universal test machine.The force was applied at a crosshead speed of 1 mm/min until catastrophic fail-ure occurred.Fracture loads and failure modes were recorded.Results:
Mean of the fracture strength values(kN)in group A,B,C, D and E were 0.95 ±0.39,1 .29 ±0.50,1 .54 ±0.28,2.04 ±0.1 9 and 2.27 ±0.53 respectively(among groups,P <0.05).Two types of fracture modes were observedchipping of the veneering porcelain and fracture of the veneering porcelain together with the framework.Conclusion:
Zirconia coping design with 1 .5 mm cervical collar height may increase the compressive strength of CAD/CAMzirconia-ceramic restoration.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Idioma:
Chino
Revista:
Journal of Practical Stomatology
Año:
2014
Tipo del documento:
Artículo
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