Each looped guidewire was fed through the holes prepared in the graft, exiting on the cortical side, after ensuring that the looped guidewires were not tangled within the joint. The anterior implants were fed with the preassembled suture through the end of the looped guidewire using a classic slip-knot. This was achieved by passing the loop of the lead suture through the looped guidewire and feeding the implant through the lead suture. The graft was slid toward the end of the guidewires to lodge the implant. It was important to first retrieve the inferior suture from the antero-inferior portal, and when the whole graft was inside the joint, to retrieve the superior suture. It was important to carefully visualize the position of the graft from the posterior and superior portals. It was possible to correct the graft position by alternatively retrieving the inferior and superior wires using the superior cannula with a probe hook. Anterior round endobuttons (Smith & Nephew, London, England) were advanced until they laid flat on the bone block. The graft was tipped to allow insertion into the 15 mm cannula (Fig. 5) and advanced by pulling the guidewire out posteriorly. The suture advanced the implant until the graft was flush with the glenoid anterior neck, with each suture exiting the skin posteriorly. The graft should not be too medial nor too much lateral, so it must not overflow the articular surface (Allain et al., 1998). The guide hook is placed in the middle of the defect to be sure that the graft will be centered on the defect. The posterior implants were placed on the transporter by advancing the instrument through each eyelet of the posterior round endobutton. We then passed the sutures through the transporter and retracted the transporter to allow the suture to pass through the eyelets of the posterior round endobutton.Fig. 5Left shoulder, view from anterior, metal cannula in antero-inferior portal, arthroscopic cannula in antero-superior portal. The graft passed through the metal cannula