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  Indian J Med Microbiol
 

Figure 6: (a) Superimposition is performed on the nasal line, palatal curvature, and anterior contour of the keyridge. All measurements are done parallel to MFOP. Maxillary change is measured at the SE points, ABCH at the D points, upper molar change at the mesial contact points, and incisor change at the incisal edges. (b) The superimposition is done on D points lying on a common perpendicular line to MFOP by displacing tracings along the MFOP. Again, all measurements are performed parallel to MFOP. Lower molar change is measured at the mesial contact points and incisor change at the incisal edges. (c) The tracings are displaced again until the mesial contact points of the upper molars are lying on a common perpendicular line to MFOP. The molar intercuspation change is measured at the mesial contact points of the lower molars. This measurement can be compared with the calculated intercuspation change. The difference should not exceed 0.2 mm. (d) The tracings are displaced again until the incisal edges of the upper incisors are lying on a common perpendicular line to MFOP. The overjet change is measured at the incisal edges of the lower incisors. This measurement can also be compared with the calculated overjet change. The difference should not exceed 0.2 mm. (e) Pitchfork analysis of Case 1. MFOP=Mean functional occlusal plane; SE point=Intersection of greater wing of sphenoid and cribriform plate of ethmoid; ABCH=Apical base change; D point=Geometric center of symphysis

Figure 6: (a) Superimposition is performed on the nasal line, palatal curvature, and anterior contour of the keyridge. All measurements are done parallel to MFOP. Maxillary change is measured at the SE points, ABCH at the D points, upper molar change at the mesial contact points, and incisor change at the incisal edges. (b) The superimposition is done on D points lying on a common perpendicular line to MFOP by displacing tracings along the MFOP. Again, all measurements are performed parallel to MFOP. Lower molar change is measured at the mesial contact points and incisor change at the incisal edges. (c) The tracings are displaced again until the mesial contact points of the upper molars are lying on a common perpendicular line to MFOP. The molar intercuspation change is measured at the mesial contact points of the lower molars. This measurement can be compared with the calculated intercuspation change. The difference should not exceed 0.2 mm. (d) The tracings are displaced again until the incisal edges of the upper incisors are lying on a common perpendicular line to MFOP. The overjet change is measured at the incisal edges of the lower incisors. This measurement can also be compared with the calculated overjet change. The difference should not exceed 0.2 mm. (e) Pitchfork analysis of Case 1. MFOP=Mean functional occlusal plane; SE point=Intersection of greater wing of sphenoid and cribriform plate of ethmoid; ABCH=Apical base change; D point=Geometric center of symphysis