While traditional veneers are much thicker, requiring the grinding down of your original tooth structure, Lumineers are so thin that little to no tooth reduction is necessary. Additionally, the durability of Lumineers allows them to resist wear and remain resilient to last over 20 years.
CALIBRATION - An operation that, under specified conditions, in a first. step establishes a relation between the quantity values with  measurement. uncertainties  provided by measurement standards and corresponding. indications with associated  measurement uncertainties  and, in a second.
A primary standard in metrology is a standard that is sufficiently accurate such that it is not calibrated by or subordinate to other standards.Primary standards are defined via other quantities like length, mass and time. Primary standards are used to calibrate other standards referred to as working standards.tandards are used in analytical chemistry. Here, a primary standard is typically a reagent which can be weighted easily, and which is so pure that its weight is truly representative of the number of moles of substance contained.