title: [Roentgen-negative retractors in osteosyntheses of the spine].
mesh_terms: D002574:Cervical Vertebrae / Q000000981:diagnostic imaging / Q000293:injuries*; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D050723:Fractures, Bone / Q000000981:diagnostic imaging*; D005598:Fractures, Spontaneous / Q000601:surgery; D006801:Humans; D007796:Laminectomy / Q000295:instrumentation; D011859:Radiography
vernacular_title: Röntgennegative Retraktoren bei Osteosynthesen an der Wirbelsäule.