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I've recently aquired this Tyrannosaurid tooth from a local shop. The shop sold it as Nanotyrannus lancensis. I think the tip has been repaired, but not quite sure that it is worn or repaired. However the tooth does not show the indents on the bottom, which is sometimes to be expected on Nanotyrannus I heard. I was wondering if somebody could take another look for me and share their opinion, about what species this tooth belonged to. Thanks in advance. The tooth was found in the Hell Creek Formation in Montana

Hey y'all. I've had this therapod tooth for a while, and I'm wondering if an id can be placed on it. It's completely shattered unfortunately, so I don't expect an id to be easy. It's from the Hell Creek formation. It was labeled as T. rex, but I'm not convinced. Though, I've very little knowledge of dinosaur teeth. I've attached various photos of the tooth in question, and some reference serrations from a probable rex. Thank you!

I got this from a guy who found it at Montana the Hell Creek area. I was wondering if it was a Nanotyrannus Tooth or a different carnivore?

Many serious dinosaur collectors would consider a good T-Rex tooth as probably the Holy Grail item in their dream collection. I am one of those people who would love to own one of these teeth in a collection. However from my research, online Googling and Ebay-hounding I have seen a lot of T-Rex teeth being offered online some for 4 digits figures and some in the 2 to 3 digits price range, though these cheaper ones are either small less than 2 inches or just tooth tip. While the expensive ones valued at the 1,000s of dollars with big fat long tooth tend to have clear T-Rex-ish features sold by dealers with mostly good reputation who seem to possess ID and preparation expertise, which I feel do not present much problem for the most part. Though, it's the smaller ones sold in the range of 100s of dollars that seem to present much more of a gambling when purchasing since I can see any dealers can simply put "T-Rex" tag on their supposedly "NanoTyrannus" specimen (which I believe isn't technically or scientifically wrong at this time due to the still disputing in the scientific community - correct me if I am wrong, though) and up the price or make the deal seem like a steal since for the same size an identified NanoTyrannus specimen would command much less price than a T-Rex one. To make the matter even more complicated, it seems really hard to differentiate the Nanotyrannus tooth from a T-Rex tooth with perhaps the exception of getting a microscope to count the serrations/cm. but I think that's not always realistically possible due to the impossibility of access to the specimen if you are buying online or due to the fact that the serrations may not be preserved enough to be able to do this effectively. What I try to get around this issue to minimize possibility of getting burned with my limited experience and accessibility with these things would be to buy small T-Rex tooth and set acceptable budget in the range that wouldn't exceed the Nanotyrannus tooth specimen too much. Meaning if I pay for a T-Rex tooth at a close-to-Nanotyrrannus price range, then if worse comes to worst and what I got isn't a "real T-Rex" tooth then I still got myself a fair priced NanoTyrannus tooth anyway. Anyone else with expertise in handling, buying or selling these things could add more tips or techniques when purchasing these things would be greatly appreciated I think it could benefit many new collectors looking to acquire dino-teeth specimen. Thxs!!