The DEMO version only includes 4 pages:
http://thedentalimplantcentre.com
http://thedentalimplantcentre.com/about-us/video-library.html
http://thedentalimplantcentre.com/dental-implants.html
http://thedentalimplantcentre.com/dental-implants/full-mouth-dental-implants.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page