opendemo.it was a demonstration host: alongside the journal it served a small number of other sites, and their addresses were indexed. They are kept here so that nothing that once answered on this domain now answers with an error.
Sites kept from the domain history
Why a restoration keeps addresses that are not its own
A domain accumulates links. Some of them were printed in journals, some sit in library catalogues, some live in other people's bookmarks and in the indexes of search engines. When a domain changes hands or purpose, every one of those links points at whatever answers today. Returning an error breaks the chain; returning the original content keeps it intact, which is the only part of the old site that still has value to anyone outside it. Removing these four pages would break links that point at this domain from outside, which is the one thing a restoration should never do.
What is kept, and how
These pages reproduce the text as the web archive preserved it, without editing and without additions. They carry a noindex instruction, so they remain reachable by anyone following an old link while staying out of search results, where they would compete with the journal for queries that have nothing to do with urology. The journal itself is in the archives.
Information on these pages is out of date
Addresses, telephone numbers and opening hours printed here date from 2014 and 2015 and belong to the organisations that published them at the time. Nothing on these pages describes The Urologist or AURO.it, and nothing here should be used to contact anyone today.
How the old addresses are served
Each address from the domain history answers at the path it had, with a 200 rather than a redirect: an old link lands on the page it pointed to instead of being bounced to a home page that means nothing to the person who followed it. Addresses from the journal platform behave the same way, which is why a link to an OJS path written in 2013 still opens the issue or the article it named; how that routing works is set out on the page about this publishing system. The pages in this branch carry a noindex instruction on top of that, so they answer for people and stay out of search results.
What DentalPlanet was
A group of dental practices with two sites, Milan and Novara, that used the host for a set of landing pages and a booking form between roughly 2014 and 2016. What the web archive preserved is four pages: the group page, one for the Milan practice, one for Novara and the privacy policy attached to the form. The booking form itself was never archived and does not work; the telephone numbers and opening hours printed on the pages belong to that period.
Why they are not simply deleted
Deleting them would cost something and save nothing. The pages are small, they are out of the index, and they do not compete with the journal for any query. Against that, every link pointing at them from outside would start returning an error, and there is no way to know in advance which of those links matter to someone. Keeping an address alive is cheap; discovering afterwards which one was needed is not.