The difficult operations on deleting of nonmalignant lesion of mandibular bones and arthroplasty of temporal mandibular joint have taken place in maxillofacial surgery unit of Republican Clinical Hospital. Such polysyllabic operation has been led by surgeons- stomatologists of maxillofacial surgery sub-faculty of КSМА Professor O.V.Nesterov and Senior lecturer E.V.Urakova.