Micro CT三维重建手舟骨相关显微影像解剖学数据测量

Microscopic imaging of three-dimensional reconstructed scaphoid bone measured by Micro CT

背景:目前国内外学者对外科治疗手舟骨骨折作了大量的应用解剖学研究,而有关手舟骨的显微影像解剖学研究国内外文献报道甚少。目的:运用Micro CT测量手舟骨相关影像解剖学数据,为手舟骨骨折的外科治疗提供显微影像解剖学基础。方法:实验从成都医学院局解实验室随机选取80侧(左右各40侧)国人成人干燥手舟骨标本,未分性别。应用游标卡尺测量舟骨和Micro CT扫描标本,用Micro CT自带三维重建系统分析手舟骨三维骨结构,并逐一测量:①舟骨的纵轴长度。②舟骨嵴的近端宽度。③舟骨嵴的腰部宽度。④舟骨嵴的远端宽度。⑤舟骨结节高度。⑥舟骨结节厚度。⑦舟骨结节宽度。⑧舟骨体部最小厚度。⑨舟骨腰部的厚度。⑩舟骨腰部的宽度。结果与结论:Micro CT三维成像可以看出:手舟骨结节部的宽度和厚度比较接近,整个手舟骨结节部形似圆锥;手舟骨腰部连接结节部与体部;体部前后径明显大于左右径,体部的舟头关节面与舟桡关节面相邻处骨质是整个手舟骨最薄的地方。手舟骨结节部、腰部及体部的桡背侧部分有明显的血管压迹贯穿,并因此形成其纵轴及背嵴。对所测量结果进行统计学分析,结果显示Micro CT所测得的各径线值与游标卡尺所测得数据差异无显著性意义(P>0.05)。左右侧手舟骨Micro CT三维成像的各部分测量值差异无显著性意义(P>0.05)。说明Micro CT所测得数据具有很高的准确性,依据Micro CT三维重建后的手舟骨测量数据及影像解剖特点,可为外科治疗手舟骨骨折时设计内固定器械提供显微影像解剖学理论依据。

BACKGROUND：At present, scholars have made many studies on applied anatomy of scaphoid fracture in surgical therapy. Few studies concerned microsurgical imaging of scaphoid bone. OBJECTIVE： Image data of scaphoid bone were measured using Micro CT to provide anatomic basis for surgical treatment on scaphoid fracture. METHODS：A total of 80 sides （40 left sides and 40 right sides） of dry scaphoid bone samples of adult Chinese were randomly selected from the Laboratory of Topography, Chengdu Medical Colege, no matter male or female. A vernier caliper was utilized to measure scaphoid bone and Micro CT was used to scan the samples. Three-dimensional structure of the scaphoid bone was analyzed using the three-dimensional reconstruction system of Micro CT. Moreover, the folowing data were measured：① the length of longitudinal axis of scaphoid bone;② proximal width of scaphoid crest;③ lumbar width of scaphoid crest;④ distal width of scaphoid crest;⑤ height of tubercle of scaphoid bone;⑥ thickness of tubercle of scaphoid bone;⑦ width of tubercle of scaphoid bone;⑧ minimum thickness of scaphoid body;⑨ thickness of scaphoid waist;⑩ width of scaphoid waist. RESULTS AND CONCLUSION： Micro CT three-dimensional images demonstrated that the width and thickness＆nbsp;of tubercle of scaphoid bone were close. The tubercle of scaphoid bone was conoid. Scaphoid waist connected to tubercle and body. The anteroposterior diameter of the scaphoid body was obviously larger than the left-right diameter. The bone closed to head articular surface and radial articular surface was thinnest place of the scaphoid bone. Apparent vascular lake was seen on the radial dorsal side of tubercle, waist and body of scaphoid bone. Thus, longitudinal axis and dorsal ridge formed. Measure results were statisticaly analyzed. Results revealed that no significant difference in each diameter line value measured by Micro CT and data measured by vernier caliper was detected （P 〉 0.05）. No significant difference in measured values of three-dimensional images of each part of left and right scaphoid bones measured by Micro CT was observed （P 〉 0.05）. Results indicated that data measured by Micro CT were precise. The anatomic characteristics of data and images of reconstructed scaphoid bone measured by Micro CT provide theoretical evidence for fixator design after scaphoid fracture in surgical treatment.