It would actually be more appropriate to call it dentistry, oral and maxillofacial medicine, since dentistry is the medical specialty that focuses on the prevention, detection and therapy of diseases, injuries and malformations in the dental, oral and maxillofacial area. So it comes as no surprise that dentistry is subdivided into different specializations.
Malfunctions of the masticatory apparatus can also be caused outside the immediate oral area - for example in the head or neck. Medical professionals in the respective specializations are primarily concerned with the health and esthetic appearance of the teeth. Highly qualified specialists in implantology are responsible for individually tailored dentures. You can find an overview here - and the direct route to the appropriate dental specialist.