Three-Dimensional Description of Ligamentous Attachments Around the Lunate

Purpose To detail the location and area of specific ligament attachments on the 3-dimensional (3-D) surface morphology of the individual carpal bones. Methods We describe the attachment regions of both extrinsic and intrinsic intercarpal ligaments by using a combination of detailed dissection, computed tomography imaging, and a 3-D digitization technique and provide detailed information about ligament attachments around the lunate. Results The length, width, and thickness of each ligament are described in millimeters and its area of attachment is given in square millimeters and as a percentage of the bone surface and/or total ligament attachment area. The attachment sites of the ligaments also are shown visually on 3-D images of the bones. Conclusions This study improves the knowledge and understanding of carpal ligament anatomy, which can result in better intraoperative assessment of ligament integrity/disruption and allow more accurate and anatomic repair, reattachment, and/or reconstruction of carpal ligaments for the treatment of carpal instability.