Operator's Manual - Sirona - Technical Documentation

DesignRedefining the insertion axisSirona Dental Systems GmbHOperator's Manual7.4.1 Preparing the right insertion axisCEREC Biogeneric obtains the information it requires from the occlusal surfaceand the proximal contact line of adjacent teeth. During the acquisitionprocedure, all the essential information is recorded based upon the insertionaxis specified by the user: The software stipulates that both levels must bepositioned vertically to the insertion axis. If indentations are created by positioningthe insertion axis vertically to the occlusal surface in the preparatorysteps, you must change the direction of the insertion axis. Deviations of theacquired surface from the actual occlusion have a negative effect upon thequantity of data available for the biogeneric algorithm. This has the potentialto affect the quality of the proposal.DCEBAGFA Tooth contour E PreparationB Proximal contact line F UndercutC Occlusal surface G Alternative buccal preparationlineD Insertion axis(A) displays the original contour of the tooth to be restored.The optimum alignment for the insertion axis (D), in order to provide informationfor the biogeneric algorithm, is vertically to the proximal contact line (B)and occlusal surface (C).Should this optimum axis not be positioned for the preparation (E), indentationsmay occur. (G) shows an alternative buccal preparation line which wouldoptimize the angle of insertion and enable optimum results from CEREC Biogeneric.59 56 458 D 3344110 D 3344.208.05.14.02 04.2011