Department of Orthopaedic Surgery, Carolinas Medical Center, Charlotte, NC.
Department of Orthopaedic Surgery, Rutgers, The State University of New Jersey-New Jersey Medical School, Newark, NJ.
J Orthop Trauma. 2018 Apr;32(4):178-182. doi: 10.1097/BOT.0000000000001100.
To quantify the osseous anatomy of the dysmorphic third sacral segment and assess its ability to accommodate internal fixation.
Retrospective chart review of a trauma database.
University Level 1 Trauma Center.
Fifty-nine patients over the age of 18 with computed tomography scans of the pelvis separated into 2 groups: a group with normal pelvic anatomy and a group with sacral dysmorphism.
The sacral osseous area was measured on computed tomography scans in the axial, coronal, and sagittal planes in normal and dysmorphic pelves. These measurements were used to determine the possibility of accommodating a transiliac transsacral screw in the third sacral segment.
In the normal group, the S3 coronal transverse width averaged 7.71 mm and the S3 axial transverse width averaged 7.12 mm. The mean S3 cross-sectional area of the normal group was 55.8 mm. The dysmorphic group was found to have a mean S3 coronal transverse width of 9.49 mm, an average S3 axial transverse width of 9.14 mm, and an S3 cross-sectional area of 77.9 mm.
The third sacral segment of dysmorphic sacra has a larger osseous pathway available to safely accommodate a transiliac transsacral screw when compared with normal sacra. The S3 segment of dysmorphic sacra can serve as an additional site for screw placement when treating unstable posterior pelvic ring fractures.
定量研究畸形第三骶椎的骨解剖结构，并评估其容纳内置固定的能力。
回顾性分析创伤数据库中的图表。
大学一级创伤中心。
59 名年龄在 18 岁以上的患者，其骨盆的计算机断层扫描分为两组：一组具有正常的骨盆解剖结构，一组具有骶骨畸形。
在正常和畸形骨盆的轴位、冠状位和矢状位计算机断层扫描上测量骶骨骨区。这些测量结果用于确定在第三骶骨段容纳经髂骨经骶骨螺钉的可能性。
在正常组中，S3 冠状面横径平均为 7.71mm，S3 矢状面横径平均为 7.12mm。正常组的 S3 横截面积平均为 55.8mm。畸形组的 S3 冠状面横径平均为 9.49mm，S3 矢状面横径平均为 9.14mm，S3 横截面积为 77.9mm。
与正常骶骨相比，畸形骶骨的第三骶骨段具有更大的骨通道，可安全容纳经髂骨经骶骨螺钉。在治疗不稳定的骨盆后环骨折时，畸形骶骨的 S3 节段可以作为额外的螺钉放置部位。
