抄録
The Japanese Academy of Maxillofacial Prosthetics has released the 2019 edition of the Clinical Practice Guideline, which is an update of the 2009 edition in a format compliant with the GRADE system. This guideline consists of one clinical question （CQ） as a foreground question and seven questions and answers （QAs） as background questions. The CQs provide recommendations and explanations, and the QAs provide answers and overviews of maxillofacial prosthetic treatment.
The reason why there is only one CQ in this guideline is that the maxillofacial prosthodontics field has many case reports and case-concentration studies due to the small number of cases, and it is difficult to conduct systematic reviews and meta-analyses.
In the future, professional societies in this field should promote multi-center collaborative research and the like as a basis for establishing evidence.
