The typical tolerance of the NobelGuide concept is within 1.5 mm. The semi-transparent yellow zone around the implant shapes helps the user to be conscious of this aspect also in relation to vital structures. The yellow zone is a cylinder that exceeds the radius of the actual implants with 1.5 mm combined with a 3 mm vertical cone.
The yellow zone also warns the surgeon of potential risks when it becomes visible through the outer bone surface, indicating that there is less than 1.5mm distance of planned implant shape and bone surface.
Notes
— Drills may extend 1 mm longer than planned implant(s). This is reflected in the minimum 3 mm vertical safety distance of the warning zone.
— Keeping at least 3 mm of vital bone in between two implant-bone interfaces and a minimal distance of 1.5 mm between a tooth root and an implant is recommended to allow cellular re-colonization with proper blood supply
— The NobelGuide concept builds on a sequence of various steps performed by the clinician chair-side (e.g. impression taking, handling of surgical template during surgery), by the dental lab (e.g. stone model fabrication, creation of radiographic guide) and radiology (using correct settings while digitizing and correct segmentation using the calibrated isovalue - NobelGuide Calibration Procedure). Each step must be performed carefully as they influence the overall accuracy of each individual case.