In vitro marginal adaptation of alumina porcelain
ceramic crowns. J Prosthet Dent 1994;72(6):585-90.
The high demand for aesthetic dental restorations made
ceramic crowns popular.
Material and Methods: The thickness of functional and non-functional cusps for both complete cast and metal
ceramic crowns fabricated in the dental laboratories of multiple teaching hospitals were measured using Iwanson gauge.
In vitro retentive strength of zirconium oxide
ceramic crowns using different luting agents.
In 2012, Biacchi and Basting compared the fracture strength of 2 types of full
ceramic crowns: indirect conventional crowns retained by glass fibre posts and endocrowns.
The
ceramic crowns were then cemented using the dual-cured version of the same cement.
He received a
ceramic crown (metal-free) rehabilitation on the upper teeth two years ago.
Materials Elastic Poisson's Reference modulus (GPa) ratio Cortical bone 13.7 0.30 [25] Trabecular bone 1.37 0.30 [25] Periodontal 0.069 0.45 [25] ligament Dentine 18.6 0.31 [25] Gutta-percha 0.00069 0.45 [25] Post cement 5.0 0.30 [25] Resin core 20.0 0.30 [25] Fiberglass post 53.8 0.30 [13] Gold alloy 95.0 0.33 [14] PEKK 5.1 0.40 Manufacturer
Ceramic crown 62.0 0.30 [25] Table 2: Flexural strengths for the different component materials of the model.
However, there are no particular specifications in relation to the clinically acceptable marginal discrepancy.4 May et al18 evaluated that a marginal gap at the crown and die interface of an all
ceramic crown in the posterior dentition was less than 70 micrometers.
Treatment planning was decided to restore the tooth with fibre-reinforced composite resin post and core
ceramic crown after root canal treatment.
