The series “A Thousand and One Questions from the Lab” is a run of short videos produced by the technicians at Khai Nguyen Dental Lab since May 2026, answering the professional questions that come up daily at the bench. It began as a way for our own technicians to revise together and share practical experience, and to support technicians new to the trade. This page collects the episodes released so far and the technical content behind each.
Above: the series, episode 2 — handling a dark preparation.
Episode 1: how polishing differs from glaze firing
Released 26 May 2026. This is the question new technicians ask most often at the finishing stage. Glaze firing applies a thin glassy layer and fires it, giving a very high shine but softening the surface texture, and it can wear away over time. Mechanical polishing creates the shine within the ceramic body itself, preserves the surface texture the technician created, and can be restored after the clinician makes an occlusal adjustment.
Episode 2: handling a dark preparation
Released 2 July 2026. How to mask a dark preparation while still reaching a bright shade and keeping natural translucency. The episode covers what the technician actually does at the framework and layering stages: choosing an ingot of the right opacity, cutting back to leave room for the effect layer, and placing the masking layer against the preparation rather than thickening the whole restoration evenly.
Episode 3: what makes a single dark-preparation central incisor more manageable
Released 14 August 2026. A single anterior unit on a dark preparation is always a demanding brief. This episode sets out three core factors the clinician can prepare so that the success rate is higher: restorative space, material, and a design matched to the required effect.
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The series is built from real questions. If you have one you would like the laboratory to answer in a coming episode, send it through our contact channels or comment under the videos on the Khai Nguyen Dental Lab Facebook page.
Source: Khai Nguyen Dental Lab Facebook page, videos of 26 May, 2 July and 14 August 2026.
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