My paper's content is slightly changed from the abstract I have submitted to a conference, can I edit the accepted abstract on my poster? I'm fairly early on in my PhD research. A few months ago I submitted an abstract to a conference, which was accepted. The conference is coming up soon, and my research has taken a slight turn away from my accepted abstract (still same field, collaborators, etc...--just asking slightly different questions and taking a slightly different approach).

My question is, am I obligated to put the program-accepted abstract on my poster? If I am, should I try to tie my poster content as closely to that accepted abstract as possible? Or can I present poster content that would've been more appropriate for a different abstract? 

Or can I use a different abstract on my poster, and thus tie the content more closely to what my current research path is?

What about keeping the original abstract in its entirely, but appending it?

EDIT: I'm in the field of astrobiology (probably most similar to the fields of geology or astronomy if I had to relate it to a more conventional field)
I work in astronomy.

I have never heard of anyone in authority at a conference complain about a slight deviation from a submitted abstract. 

I suggest writing your poster on your new direction, with a corresponding abstract.

I would also submit your amended abstract to the LOC of the conference as soon as possible. Mention that your work has taken a slight turn but the main topic and co-authors are unchanged. 

If there is time, the LOC can include your amended abstract on any web-page or hard-copy documentation. Apologise for the inconvenience that this may cause the LOC and ask nicely that they make these amendments, if possible.

Even if these documents cannot be altered, I doubt that anyone is going to get upset that your new abstract is not exactly the same that you originally submitted.