In order to study the microstructure characteristics of normal lunate bones, eight fresh cadaver normal lunates were scanned with micro-computed tomography. High-resolution images of the micro-structure of normal luna...In order to study the microstructure characteristics of normal lunate bones, eight fresh cadaver normal lunates were scanned with micro-computed tomography. High-resolution images of the micro-structure of normal lunates were obtained and we analyzed the nutrient foramina. Then nine regions of interest(ROI) were chosen in the central sagittal plane so that we could obtain the parameters of trabecular bones of ROIs. The distal lamellar-like compact structure had statistically significant differences when it was compared with the ROIs in the volar and dorsal ends of the distal cortex. The difference of diameter between the volar and dorsal foramina was significant(P<0.05). However, there was no significant difference regarding the number. The trabecular bones of the volar and dorsal distal ends had lower intensity than those of the distal central subchondral bone plate. The diameters of the nutrient foramina on the volar cortex were larger than those on the dorsal. This research provided more detailed information about microstructure of normal lunate and the nutrient foramina on cortex, and a reference for further study about diseased lunate.展开更多
Background： The etiology of Kienb-ck＇s disease is controversial, and the blood supply is a possible pathogenic factor. The red lead （Pb3O4） angiography with micro-computed tomography （micro-CT） of lunate to inve...Background： The etiology of Kienb-ck＇s disease is controversial, and the blood supply is a possible pathogenic factor. The red lead （Pb3O4） angiography with micro-computed tomography （micro-CT） of lunate to investigate intralunate arteries has rarely been reported. This study aimed to investigate a new, reasonable, and simplified technique to study the intraosseous arterial pattern of normal lunates. Methods： This study investigated the intraosseous arterial pattern of six normal cadaveric lunates through Pb3O4 injection and three-dimensional reconstruction with micro-CT. The intraosseous arteries of all specimens were clearly enhanced. The data of enhanced arteries and nutrient foramina were shown as median （Q1, Q3） and analyzed with Wilcoxon signed-rank test. Results： The mean number of total nutrient foramina was 2.00 （1.75, 2.00） on the palmar side and 3.50 （2.50, 4.25） on the dorsal side. The number with enhanced arteries on the palmar side was 1.00 （0.75, 2.00） and on the dorsal side was 3.50 （1.75, 4.00）. There were no significant differences between the number of nutrient foramina on the palmar and dorsal sides of the lunates, no matter the total number or enhanced arteries. The intraosseous arterial pattern in normal lunates can be classified into three types： the dominate stems from the palmar side, from the dorsal side, and from both sides with anastomosis. Conclusions： The Pb3O4 angiography with micro-CT is a simplified, quicker, and reliable method to study intraosseous arteries.展开更多
文摘In order to study the microstructure characteristics of normal lunate bones, eight fresh cadaver normal lunates were scanned with micro-computed tomography. High-resolution images of the micro-structure of normal lunates were obtained and we analyzed the nutrient foramina. Then nine regions of interest(ROI) were chosen in the central sagittal plane so that we could obtain the parameters of trabecular bones of ROIs. The distal lamellar-like compact structure had statistically significant differences when it was compared with the ROIs in the volar and dorsal ends of the distal cortex. The difference of diameter between the volar and dorsal foramina was significant(P<0.05). However, there was no significant difference regarding the number. The trabecular bones of the volar and dorsal distal ends had lower intensity than those of the distal central subchondral bone plate. The diameters of the nutrient foramina on the volar cortex were larger than those on the dorsal. This research provided more detailed information about microstructure of normal lunate and the nutrient foramina on cortex, and a reference for further study about diseased lunate.
文摘Background： The etiology of Kienb-ck＇s disease is controversial, and the blood supply is a possible pathogenic factor. The red lead （Pb3O4） angiography with micro-computed tomography （micro-CT） of lunate to investigate intralunate arteries has rarely been reported. This study aimed to investigate a new, reasonable, and simplified technique to study the intraosseous arterial pattern of normal lunates. Methods： This study investigated the intraosseous arterial pattern of six normal cadaveric lunates through Pb3O4 injection and three-dimensional reconstruction with micro-CT. The intraosseous arteries of all specimens were clearly enhanced. The data of enhanced arteries and nutrient foramina were shown as median （Q1, Q3） and analyzed with Wilcoxon signed-rank test. Results： The mean number of total nutrient foramina was 2.00 （1.75, 2.00） on the palmar side and 3.50 （2.50, 4.25） on the dorsal side. The number with enhanced arteries on the palmar side was 1.00 （0.75, 2.00） and on the dorsal side was 3.50 （1.75, 4.00）. There were no significant differences between the number of nutrient foramina on the palmar and dorsal sides of the lunates, no matter the total number or enhanced arteries. The intraosseous arterial pattern in normal lunates can be classified into three types： the dominate stems from the palmar side, from the dorsal side, and from both sides with anastomosis. Conclusions： The Pb3O4 angiography with micro-CT is a simplified, quicker, and reliable method to study intraosseous arteries.
