Obtaining　real-world　data　on　close　contact　behaviors　between　dental　staff　and　patients　in　clinics　is　of　great　significance　for　a　comprehensive　analysis　of　the　pathogen　transmission　mechanism　in　this　environment.　We　collected　images　of　close　contact　behaviors　between　dental　staff　and　patients　during　the　diagnosis　and　treatment　processes.　The　data　were　processed　and　identified　through　semi-supervision　learning.　Our　findings　revealed　a　relatively　high　incidence　of　close　contact　among　personnel　within　dental　clinics.　Moreover,　compared　with　nurses,　the　interpersonal　distance　between　doctors　and　patients　was　significantly　lower　(P　©　2024　18th　Conference　of　the　International　Society　of　Indoor　Air　Quality　and　Climate,　INDOOR　AIR　2024　-　Conference　Program　and　Proceedings.　All　rights　reserved.