Fig. 2

a An osseous tunnel was established using a 1.5-mm K-wire. The left image shows the entry point of the K-wire, and the right image shows its exit point, which was monitored arthroscopically using the arthroscope placed in the 3–4 portal. b A needle loaded with a 2–0 PDS II suture penetrated through the v-RUL at the volar side of the fovea and was inserted into the joint to introduce the PDS II suture into the joint. The left image shows the arthroscopic conditions, the middle image shows the intraoperative appearance, and the right image shows the schematic diagram. PDS II, polydioxanone II; v-RUL, volar radioulnar ligaments. c Two nickel alloy loops were introduced into the joint through the osseous tunnel and d-RUL at the dorsal side of the fovea, using two additional needles. Note that the two loops cannot cross through each other. The left image shows the arthroscopic conditions, the middle image shows the intraoperative appearance, and the right image shows the schematic diagram. d-RUL, dorsal radioulnar ligaments. d All needles were withdrawn, and the PDS II suture was retrieved by a grasper from the 6R portal after passing through the two loops. The left image shows the arthroscopic conditions, the middle image shows the intraoperative appearance, and the right image shows the schematic diagram. e Both loops were retrieved, carrying the middle and end of the PDS II suture out of the joint through the osseous tunnel and the d-RUL, respectively, with the former forming 2 strands. The volar and dorsal sutures of the fovea were formed after the middle portion of the PDS II suture was cut using scissors. The left image shows the arthroscopic conditions, the middle image shows the intraoperative appearance, and the right image shows the schematic diagram. f Repair was completed after the sutures were tied, with the traction released. The left image shows the arthroscopic conditions, and the right image shows the intraoperative appearance