This interesting case was referred to me last year. I had been asked to treat the tooth with a root canal filling and a post and core so it could be cut down ready for a full coverage crown.
This suggested treatment is often necessary for teeth that are very broken down and either painful or infected. On this occasion however I wanted to preserve as much sound tooth tissue as possible and did not feel a root filling was necessary as the tooth was comfortable and responded normally to routine testing. By building the tooth up directly I was able to restore function and aesthetics with no further drilling and for less than a third of the cost for the alternative plan. Clearly the tooth has an uncertain future but at least we have left every other option open and have not caused any further damage to it in the meantime.