Cone-beam computed tomography for primary investigation of wrist trauma provides a new map of fractures of carpal bones.

In 2016, our primary modality for radiological examination of wrist trauma, was changed from radiography to cone-beam computed tomography (CBCT). This is a retrospective survey of carpal bone fractures detected by CBCT during 6 months in 2016/2017, compared with those found on conventional radiographs during 6 months in 2013/2014. The incidence of carpal fractures was three times higher during the CBCT period (92/100,000 per year) compared with the radiography period (29/100,000 per year) and the spectrum of anatomical locations was different between the two periods, with fractures of the lunate ( = 6), trapezium ( = 9), trapezoid ( = 4) and capitate ( = 1) detected by CBCT, in contrast to no fractures of these bones diagnosed during the 6 months radiography period.