Micro-Structural Profiles of Trabecular Bone at the Ankle Joint

Kim, Hyon Jeong; An, Tae Sun; Baek, Myong Hyun; Choi, Mun Kwon; Won, Ye Yeon

Abstract

PURPOSE: This study aimed to investigate and compare the micro-structural profiles of trabecular bone from different facets at the ankle joint.
MATERIALS AND METHODS
In a fresh cadaver ankle, four cored 10 mm of diameter cylindrical specimens of trabecular bone were harvested from the distal tibia, the talar dome, the medial malleolus, and the lateral malleolus. Using a micro-computed tomography, two-dimensional and three-dimensional micro-structural indices of the trabecular bone were analyzed.
RESULTS
Each specimen from the tibia, talus, medial malleolus, and the lateral malleolus showed unique micro-structural pattern. Tibia versus talus, the talus was seen a higher bone volume fraction and a wider supporting zone subchondrally whereas the tibia was seen a relatively lower bone volume fraction and a much narrower supporting zone subchondrally. Lateral malleolus versus medial malleolus, the lateral malleolus was seen the thicker but sparse trabeculae pattern whereas the medial malleolus was seen the thinner but more compact trabecular pattern.
CONCLUSION
Each four locations from the different facet at the ankle joint have distinct own micro-structural patterns of the trabecular bone, suggesting different mechanical properties.