Final answer:
The correct term for replacing a broken tooth with an artificial one in the jaw is 'implant.'
Step-by-step explanation:
The term that best fits the blank in the sentence is implant. When a tooth is broken or missing, a dental implant can be placed in the jaw to replace the natural tooth. The implant is a screw-like structure made of titanium that is inserted into the jawbone, mimicking the root of a natural tooth. A crown can then be attached to the implant to create a functional and aesthetically pleasing replacement tooth.