Aim– To compare sagittal inclination of occlusal plane with two different anterior reference point of facebow

Setting and design– The study consisted twenty subjects comprising both sexes (M/F) between the ages of 18 to 30 years and all having a full complement of natural teeth.

u  Material and methods– Two face bow records were made

1. Hanau spring bow facebow record with orbitale as anterior reference point
2. Gnatus jp 30 face bow with nasion as anterior reference point.

Facebow records were transferred to their respective articulators and mounting of cast were done. A vernier caliper was used to measure linear distances between several points. Lateral cephalogram of each patient was taken and cephalometric tracing was done to measure the angle between axis orbitale plane and occlusal plane.                             

Statistical analysis used– Average values

Results– The difference of angle between axis orbitale plane and occlusal plane between cephalometric tracing and hanau articulator was 4.35 and between cephalometric tracing and gnatus articulator was 7.65.

Conclusion– Sagittal inclination of occlusal plane with orbitale as anterior reference point is closer to orientation of maxilla compared to anterior reference point as nasion.