
1) Dentistry branch
Found on
https://www.crosswordclues.com/clue/periodontology

Periodontology or Periodontics (from Greek περί peri `around`; and ὀδούς odous `tooth`, genitive ὀδόντος odontos) is the specialty of dentistry that studies supporting structures of teeth, as well as diseases and conditions that affect them. The supporting tissues are known as the periodontium, which includes the gingiva (gum...
Found on
http://en.wikipedia.org/wiki/Periodontology

periodontology The branch of dentistry that deals with the scientific study of the structures and functions of the periodontium in health and disease; broader in scope than periodontics, which is limited to the diagnosis, prevention, and treatment of periodontal disease, although the two terms are sometimes used interchangeably.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1450/9
No exact match found.