Study on Accuracy of Measurement by Means of Checkbite Method in Sagittal Plane

Abstract

Sagittal condylar inclinations during lateral motions of mandibles were measured by Checkbite method utilizing the Panahoby semi-adjustable articulator and the Hoby Checkbite sensor, and compared with the Computer Pantograph data.
The Checkbite samples were taken at the position where condyles moved 5mm away from each centric position. The Computer Pantograph measures condylar path in high accuracy starting from the centric position to the position where condyle moves about 3mm away from the centric position which corresponds to the functioning range of molar.
The number of subjects were twelve. As the result, the correlation coefficient as high as 0.825 was obtained between the Checkbite and Computer Pantograph data. The regression line derived from these data indicates fairly good coincidence of the Checkbite data with Computer Pantograph data. The root mean square error of the Checkbite data against the Computer Pantograph data was 5.77 degrees which falls within 15% of the measured value. Sagittal condylar inclinations measured by Checkbite method during protrusive motions were less accurate than those measured during lateral motions.
As a conclusion, it is proved that sagittal inclination data mesured by Checkbite method can be used practically for prosthetic operation within its limitation, providing the use of the Checkbite sensor and the data measured during lateral motion.