The theory of osteosynthesis and surgical technique of PVLP. In order to prevent dorsal re-displacement, it will be more important to obtain good subchondral support of the dorsal side of the radial facet with PVLP compared with buttress effect by covering the volar lunate facet fragment (yellow arrow: the dislocation direction of the carpal, red line: the dorsal side of the radial facet supported by the locking screw).