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Thermal compatibility evaluation of veneering ceramic over zirconia

Evaluation of Thermal Compatibility of VITA VM 9 Veneering Ceramic Over VITA In-Ceram Zirconia Framework

Fatien Fadilaldin (Autor)

Buch | Softcover

88 Seiten

2017
Noor Publishing (Verlag)
978-3-330-96746-5 (ISBN)

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The residual stresses generated during manufacturing of zirconia prostheses is the origin of unstable chipping observed clinically. The aim of this study was to analyzing the influence of porcelain thickness and the implemented cooling protocol on the magnitude of the developed residual stresses. 60 rectangular bilayered plates and thermal shock test were used to investigate the propensity for chipping, and to show the thermal residual stress resistance of the structure. Two different thickness ratios of 1:1and 1:2 mm, either rapidly or slowly cooled from sintering temperature to Tg were tested. The results demonstrated that the tested VITA VM 9 veneering ceramic and VITA In-Ceram combination had a lowest thermal shock resistance of 120 oC, with no significant differences emerging between the groups (P0.05). In addition, 100% of the samples failed cohesively and no delamination were identified. The tested system showed adequate thermal shock resistance, however with the most failed samples showed horizontal crack propagation that probably driven by compressive stresses provides a motive toward investigating a perfect TEC matching concept between the core and the veneering ceramic.

Fatien I. Fadilaldin, BDS, an MSc awarded on a research conducted on all ceramic restorations, Studied Dental Materials Science at The University of Sheffield. Responsible for carrying out teaching and research duties, Delivering lectures in Dental Materials Science (practical and theoretical), at college of Dentistry, Duhok University, Iraq.

Erscheinungsdatum	09.06.2017
Sprache	englisch
Maße	150 x 220 mm
Gewicht	147 g
Themenwelt	Medizin / Pharmazie ► Zahnmedizin
Schlagworte	Residual stresses • Thermal Compatibility • Thermal Gradients • thermal Schock • Vita Vm9 Veneering Ceramic • Zirconia Frameworks
ISBN-10	3-330-96746-3 / 3330967463
ISBN-13	978-3-330-96746-5 / 9783330967465
Zustand	Neuware