Restorations with dental crowns are an established practice for reconstructing teeth in poor condition, providing essential basic functions. Currently, there are several materials for dental crowns, chosen according to the function of each piece, from aesthetic crowns to crowns with metal alloys. Tooth preparation, especially the finish line, is crucial to ensure the strength and longevity of the crown, avoiding short- and long-term failures. Additionally, it is essential to have a good clinical history to identify problems, such as those related to the temporomandibular joint, that should be treated before crown placement. There are different types of finishing lines, each with specific applications and advantages: 90° straight shoulder: Ideal for full ceramic crowns, it offers good resistance but requires greater tooth wear; rounded shoulder: it improves the direction of chewing force...