The teeth and jawbone are all one piece. I have pictured the item so you can see when and where it was used.
I have included pictures of the plastic tubs from the studio in order to validate the origins of the item. Please feel free to ask any questions. This does not have a studio COA but Wookiedesigns Props and Memorabilia will provide a COA for this item.
I can verify this item is from the studio but please do your own due diligence before purchasing. These items can often be picture matched if screen used or they often come with wardrobe/costume tag identifiers. This item is in the category "Entertainment Memorabilia\Movie Memorabilia\Props\Originals". The seller is "wookiedesigns" and is located in this country: US. This item can be shipped worldwide.