Why not also have braces? Not sure how it wad back then but generally all teeth need to be fixed before getting braces. Maybe that work was in progress while she got murdered.
But that kinda indicates that for significant part of her life she suffered poverty, wasnt well taken care of, didnt have access to quality food and/or healthcare - cause otherwise she wouldnt have many cavities even if family couldnt afford braces for her when she was younger.
Also maybe pregnancy? Is it possible to tell if woman was pregnant before just from skeleton? I dont know, but sometimes pregnancy kinda ruins teets - with access to healthcare its mostly possible to keep under control, but without nutrients, dentist teeths are going very bad very fast.
Its not very helpful or insightful Im afraid, just my best guesses. That the reason why she had so many cavities, fillings but no braces was that either:
a) she had rough upbringing and youth, then at some point her situation improved, maybe her parents got good jobs, maybe she started working or got married and got a chance to finally take care of her teeth properly...
b) she had relatively normal upbringing and youth but bad genes when it comes to teeth - and pregnancy, or maybe prolonged sickness + low quality food, possibly not enough food, no dental care for a 2-3 years led to many cavities, then something changed and she was able to afford dental care and was on her way to get braces as soon as all the work would be done.
Use of gold may mean much or may mean nothing.
"Nothing" in a sense that at the time in her area gold was just better looking choice than silver fillings, and as she could afford it she just decided to get the gold ones. Or "much" in a sense that at the time gold fillings werent as common anymore, but held strong in some communities/groups with her being member of one of these, or closely associated with...
Also not sure if Im getting that right, but it seems to me like she was discovered somewhere close to the pin:
Not far from the road I guess, yet far enough for someone to not really be seen if showing up there at night. With location like that her murderer could have next to no ties to the owner of that land then. Probably knowing the area and being acquainted with someone maybe-related to the farm owners or workers would be "enough". Just my guess but if it got sold few years later it may be already not well taken care of at the time of her murder.
All hope really with DNA Doe Project. Great case for them cause how else anything could really be done here? Either miracle or DNA...