1. Development and clinical application of a new occlusal force measurement apparatus– wave forms and FFT power spectrum analysis 
Eto Kazuo, Yanagisawa Shigetaka, Shimizu Masatsugu, Hatajia Akira 
Pathophysiology 
Volume 4, Issue 4, Pages (January 1998)
DOI: /S (97)

2. Fig. 1 Block diagram of our system.
Pathophysiology 1998 4, DOI: ( /S (97) )

3. Fig. 2
Occlusal force wave and FFT power spectrum of healthy examineers.
Pathophysiology 1998 4, DOI: ( /S (97) )

4. Fig. 3
Correlation between pressure and erectric resistance of our sensor.
Pathophysiology 1998 4, DOI: ( /S (97) )

5. Fig. 4
Occlusal force wave and FFT power spectrum in a healthy examinee.
Pathophysiology 1998 4, DOI: ( /S (97) )

6. Fig. 5
Occlusal force wave and FFT power spectrum of the case 1. A 17 year-old man, received sagittal splitting ramus osteotomy 3 weeks before the examination. Occlusal force is 2.4 V. In FFT, the power level is 67.2 dB, the harmonics are clear and convergence point is low.
Pathophysiology 1998 4, DOI: ( /S (97) )

7. Fig. 6
Occlusal force wave and FFT power spectrum of the case 4. A 17-year-old male was diagnosed as left TMJ-fracture. Superposable waves are observed in occlusal force wave and the power level of FFT is low in affected side. Base band is narrow in FFT wave form and convergence point is low value.
Pathophysiology 1998 4, DOI: ( /S (97) )

8. Fig. 7
Occlusal force wave and FFT power spectrum of case 5. Mandibular lengthening has been performed on a 29-year-old female. The occlusal force wave is a conspicuously low voltage. Base band is narrow in FFT wave form and convergence point is low value.
Pathophysiology 1998 4, DOI: ( /S (97) )

9. Fig. 8
Occlusal force wave and FFT power spectrum of case 7. A 56-year-old male took sever periodentitis. The occlusal wave is low voltage. Occlusal force wave form is extremely low voltage. In FFT analysis, power level is low, frequency distribution is straggling and harmonics is indistinct.
Pathophysiology 1998 4, DOI: ( /S (97) )