Department of Oculoplastic, Orbital, and Lacrimal Surgery, Aichi Medical University Hospital, Aichi, Japan.
Department of Oculoplastic, Orbital, and Lacrimal Surgery, Aichi Medical University Hospital, Aichi, Japan.
Ann Anat. 2019 Jul;224:23-27. doi: 10.1016/j.aanat.2019.03.008. Epub 2019 Apr 3.
To analyze the morphology of the lacrimal sac fossa in the Japanese population using computed tomographic images.
One-hundred-fifty-five Japanese patients diagnosed with unilateral orbital fracture were retrospectively reviewed. Measurements of the dimensions of the lacrimal sac fossa were taken on three anatomical planes (upper, middle, and lower planes) using a digital caliper/protractor tool.
The mean maximum thickness of the maxillary bone at the upper, middle, and lower planes of the lacrimal sac fossa were 4.60 mm, 5.07 mm, and 6.30 mm, respectively. The midpoint thickness of the maxillary bone at each plane were 3.04 mm, 3.00 mm, and 2.17 mm, respectively. The lacrimal bone thickness at each plane were 1.13 mm, 1.13 mm, and 1.08 mm, respectively. The proportion of the lacrimal sac fossa comprising of the lacrimal bone at each plane were 39.00%, 42.05%, 38.92%, respectively. On the middle plane, the mean angle between the lacrimal bone and sagittal plane was 131.92°.
In Japanese patients, the proportion of the lacrimal bone on the lacrimal sac fossa tended to be of greater proportion compared to studies done on other races. The mean angle of the lacrimal sac fossa seemed to be comparatively high. These results indicate that performing an osteotomy during dacryocystorhinostomy could be relatively easier in the Japanese population compared to other races.
利用计算机断层扫描图像分析日本人的泪囊窝形态。
回顾性分析了 155 例单侧眼眶骨折的日本患者。使用数字卡尺/量角器工具在三个解剖平面（上、中、下平面）上测量泪囊窝的尺寸。
泪囊窝上、中、下平面上颌骨最大厚度的平均值分别为 4.60mm、5.07mm 和 6.30mm。各平面上颌骨中点厚度分别为 3.04mm、3.00mm 和 2.17mm。各平面泪骨厚度分别为 1.13mm、1.13mm 和 1.08mm。各平面泪囊窝中泪骨所占比例分别为 39.00%、42.05%和 38.92%。在中平面，泪骨与矢状面之间的平均角度为 131.92°。
在日本患者中，与其他种族的研究相比，泪囊窝中泪骨所占比例较大。泪囊窝的平均角度似乎相对较高。这些结果表明，与其他种族相比，在日本人中进行泪囊鼻腔吻合术时，进行截骨术可能相对容易。
