[A holder for plain x-ray visualization of ulnar, volar and radial injuries of the capsule and ligaments of the basal thumb joint. A hyperextensometer for the determination of the ligamentous laxity of the index finger basal joint].

We have constructed a device for standardized radiodiagnostics of ulnar, volar, and radial capsulo-ligamentous lesions of the basal thumb joint. Used as hyperextensometer at the basal joint of the index finger, the device is of equal value in the diagnosis of ligamentous laxity.