Hi Senthil, replacement of missing teeth can be done both ways through crown and bridge or by implants. The crown bridge takes less treatment time ..can get over in a weeks time and less expensive. But the disadvantage.. We are involving/trimming health teeth adjacent to the missing space. Implant on the other hand is more natural tooth like.. We don't involve the adjacent teeth.. And is a more stronger option compared to bridge. Only problem it's a little expensive and takes around 2 to 3 months time to finish the procedure. My personal opinion would be to go for implants if you are a suitable case for the same.