Harvard Medical School, Orthopaedic Hand and Upper Extremity Service, Massachusetts General Hospital, Boston, MA 02114, USA.
J Shoulder Elbow Surg. 2012 Jul;21(7):977-82. doi: 10.1016/j.jse.2011.05.011. Epub 2011 Aug 10.
To measure the average number, size, shape and articular surface area of articular fracture fragments of the distal humerus using quantitative analysis of 3-dimensional computed tomography (3DCT) images.
Forty-eight computed tomography scans of distal humerus fractures were analyzed with quantitative 3DCT (Q3DCT). Twenty-one patients had a capitellum and trochlea fracture, and 27 patients had bicolumnar fractures of the distal humerus. The volume and articular surface area of each articular fracture fragment were measured. A small fragment was defined of having a volume of less than 500 mm(3) or an articular surface of less than 500 mm(2).
Bicolumnar fractures have a mean of 9.3 fragments, 5.4 small fragments, and 3.7 articular fragments per fracture. Trochlea and capitellum fractures have a mean of 3.6 fragments, 1.5 small fragments, and 2.3 articular fragments per fracture. For each fracture type, the number of small fragments correlated with the total number of fragments.
Columnar fractures had more articular fragments and more small fragments than trochlea and capitellum fractures.
使用三维 CT（3DCT）定量分析测量肱骨远端关节内骨折碎片的平均数量、大小、形状和关节面面积。
对 48 例肱骨远端骨折的 CT 扫描进行定量 3DCT（Q3DCT）分析。21 例患者为肱骨小头和滑车骨折，27 例为肱骨远端双柱骨折。测量每个关节骨折碎片的体积和关节面面积。将体积小于 500mm³或关节面小于 500mm²的骨折碎片定义为小碎片。
双柱骨折平均有 9.3 个碎片，5.4 个小碎片和 3.7 个关节碎片。滑车和肱骨小头骨折平均有 3.6 个碎片，1.5 个小碎片和 2.3 个关节碎片。对于每种骨折类型，小碎片的数量与总碎片数量相关。
柱形骨折的关节碎片和小碎片比滑车和肱骨小头骨折多。
