Which of the following is NOT a dental specialty recognized by the ADA's National Commission on Recognition of Dental Specialties?

Implant dentistry, while a major focus of modern practice, is taught and practiced across multiple recognized specialties (oral surgery, periodontics, prosthodontics) and general dentistry — it is not itself an ADA-recognized specialty. Oral and Maxillofacial Surgery and Oral and Maxillofacial Radiology are both formally recognized specialties.