Anatomic study of the non-secure area of sacrum by first sacral verterbra screw fixation for the sacroiliac joint
Yang Yipeng*, Wang Yu, Zheng Zhanle, He Zeyang, Zhang Fei, Hou Zhiyong
*Emergency Center of Trauma, the Third Hospital to Hebei Medical University; Orthopaedic Research Institution of Hebei Province; Key Laboratory of Orthopaedic Biomechanics of Hebei Province, Shijiazhuang 050051, China
Abstract：Objective To provide anatomic basis for iliosacral screw fixation at the level of the first sacral vertebra (S1) by the study of non-secure area.Methods Eighteen adult sacrum corrosion specimens, provided by Hebei Medcal University were studied. The midline diameter length of the S1 vertebral(D), length of sacral slope and in projection of the vertebral of the S1(L), height from anterior body of the S1 to the sacral slope in projection of the vertebral of the S1(H) were measured. The area of the "non-secure area" by formula of triangle area was caculated and the area in male and female was compared.Results The specimens with large variation were excluded. The D in male and female were (27.68±0.90)mm and (26.30±2.38) mm, respectively. The L in male and female were (23.62±2.62) mm and (22.05±1.25) mm, respectively. The H in male and female were (17.70±0.98) mm and (16.40±1.03)mm, respectively. The "non-secure area" was calculated by formula of triangle area. The area in male and female were (209.10±30.99)mm2 and(180.79±15.21)mm2, respectively. There was no significant difference between both male and female in non-secure area (t=-2.170, P＞0.05). The area of it was relatively constant.Conclusions There is non-secure area for implanting S1-screw in anterosuperior of S1 vertebral, and the area is relatively constant. It can effectively prevent screws penetration the sacrum by avoiding implantation of sacroiliac joint to non-secure area.
杨毅鹏,王玉,郑占乐,何泽阳,张飞,侯志勇. 经骶1置入骶髂关节螺钉固定时骶骨“非安全区”的解剖学研究[J]. 中华解剖与临床杂志, 2015, 20(3): 217-219.
Yang Yipeng*, Wang Yu, Zheng Zhanle, He Zeyang, Zhang Fei, Hou Zhiyong. Anatomic study of the non-secure area of sacrum by first sacral verterbra screw fixation for the sacroiliac joint. Chinese Journal of Anatomy and Clinics, 2015, 20(3): 217-219.
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