In each group, the N1 wave and P1 wave amplitude density were higher and peak latency was longer in the upper retina than in the lower, there was no difference between nasal and temporal retina.

Results The peak value of anterior temporal muscle of linear occlusal dentures with severe resorption of residual ridge was higher than that of anatomic occlusal dentures ( P< 0.05 ).

The dependences of peak amplitude and temporal characteristic of pulsed photothermal spectroscopy signal on wavelength tuning are discussed.