The objective of the present study was to conduct a comparative evaluation of periodontal bone loss surgically and by radiovisiography. This study included 26 subjects with 23 mesial and 20 distal sites. Majority of RVG measurements were marginally higher than surgical values. On drawing a comparison between surgical and RVG bone loss, the difference value was statistically significant. On mesial sites, the 't' value was 4.55 with p < .001 and on distal sites 't' value was 2.79 with p < .02. In total 60% of sites showed a difference of < 0.5 mm between RVG and surgical values, 28% of sites showed values between 0.6-1.0 mm and 12% showed a1 mm difference.