Why are Digital Impressions more accurate?
Digital impressions have proven to be far more accurate than the conventional analog approach. The primary reason for this is the elimination of many potential problems that occur during the analog impression procedure. Some of the errors that are routinely found in conventional method and are a nonfactor when taking a digital impression are as follows: • Movement of tray • Tearing of impression material • Inadequate adaptation of the impression material to the dental anatomy • Bubbles & voids • Distortion from patient movement • Disinfection of non-PVS materials • Deflection of the tray • Inadequate Adhesive • Lack of tray support (overhanging material) In addition to eliminating all of the very common problems above, digital impressions also eliminate some chemical based processes. All analog impressions are a chemical based procedure. When impressions set, there is an expansion of the material. The chemical based process of pouring a stone model also contains inaccuracies as the sto
