glazing
Pronunciation: GLAY-zing
The final firing stage applied to a porcelain restoration to produce a smooth, lustrous, glass-like surface that mimics natural tooth enamel.
Full Definition
Glazing is the terminal heat treatment applied to dental ceramic restorations in which the surface reaches a temperature sufficient to cause slight surface flow, sealing micro-pores and creating a highly polished, reflective surface. It can be achieved either as an auto-glaze (firing the ceramic to its self-glazing temperature) or by applying a thin layer of liquid glaze material before firing. Glaze enhances aesthetics, reduces plaque adhesion, and seals surface porosity. Editors working on laboratory reports or product guides should distinguish between 'glazing' as a process and 'glaze' as the material. Additionally, glazing should not be confused with 'polishing,' which achieves surface smoothness mechanically.
Usage
Usage note: Distinguish 'glazing' (the process) from 'glaze' (the material). Do not use 'polishing' as a synonym; these are mechanically distinct finishing techniques.
In Context
- "After staining, the porcelain crown underwent a final glazing cycle to seal the surface and enhance lustre." — Laboratory quality assurance checklist
- "Auto-glazing eliminates the need for a separate glaze application, reducing laboratory time." — Dental ceramic manufacturer's technical bulletin