title: Superior border of the arcuate line: Three dimension reconstruction and digital measurements of the fixation route for pelvic and acetabular fractures.
abstract: OBJECTIVE
  To obtain a series of parameters describing the shape and bone thickness of the fixation route along the superior border of the arcuate line, so as to provide references for pelvic and acetabular surgery and design pelvic anatomic internal fixators.
  
  
  METHODS
  A total of 175 complete pelvic computed tomography (CT) scans of normal adult pelvises were collected. Each person's CT scans were reconstructed to create a three-dimensional pelvic model. A curve of the fixation route was delineated and divided into 11 equal parts. The total length of the curve, the radius of curvature, and the bone thickness at each decile point were all measured. The position of the pelvic inlet, the anterior and posterior sagittal diameter were measured.
  
  
  RESULTS
  The radius of curvature at each decile point were 29.18 ± 15.53, 55.27 ± 29.48, 43.04 ± 14.42, 59.62 ± 21.02, 91.67 ± 52.01, 78.9 ± 38.66, 75.76 ± 25.87, 61.75 ± 16.68, 54.62 ± 14.88, and 43.61 ± 19.10 mm, respectively. The anterior and posterior sagittal diameter of the pelvic inlet was 66.01 ± 9.15 and 41.36 ± 8.19 mm, respectively. For all groups divided by the ratio of the posterior and the anterior sagittal diameter, the decile points 1, 3, and 10 had smaller radii of curvature than the before and after points, respectively.
  
  
  CONCLUSIONS
  The curve of the fixation route along superior border of arcuate line has a relatively greater bending degree at the pubic tubercle, iliopubic eminence and close to the sacroiliac joint. With the transition of the pelvic inlet shape from android to gynecoid and platypelloid type, the bone surface at the iliopubic eminence becomes flatter. Pelvic and acetabular surgery could be more accurate by referring to the previous key bending points and the change of the pelvic inlet shape.
authors: Department of Orthopedic Surgery, First People's Hospital Affiliated to Shanghai Jiaotong University, 100 Haining Road, Hongkou District, Shanghai, 200080, People's Republic of China.
authors: Ji
authors: J
authors: Xiaoxi
authors: Wang
authors: W
authors: Fang
authors: Wang
authors: W
authors: Dongmei
authors: Li
authors: L
authors: Fan
authors: Li
authors: L
authors: Xiaoqin
authors: Su
authors: S
authors: Yunlong
authors: Zhang
authors: Z
authors: Jie
authors: Wang
authors: W
authors: Qiugen
mesh_terms: D000077:Acetabulum / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000293:injuries; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005593:Fracture Fixation, Internal / Q000379:methods*; D050723:Fractures, Bone / Q000601:surgery*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010384:Pelvic Bones / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000293:injuries; D011859:Radiography; D012815:Signal Processing, Computer-Assisted; D055815:Young Adult
references: Injury. 2007 Oct;38(10):1170-6
references: 16979170
references: Injury. 2005 May;36(5):605-12
references: 15826618
references: Injury. 2007 Apr;38(4):442-9
references: 17400226
references: Arch Orthop Trauma Surg. 2010 Feb;130(2):257-62
references: 19727782
references: J Bone Joint Surg Br. 2005 Jul;87(7):969-73
references: 15972913
references: J Orthop Surg (Hong Kong). 2003 Dec;11(2):137-40
references: 14676337
references: J Shoulder Elbow Surg. 2002 Jul-Aug;11(4):331-8
references: 12195250
references: Int Orthop. 2009 Apr;33(2):329-38
references: 18461325
references: J Bone Joint Surg Br. 1999 Nov;81(6):941-3
references: 10615962
references: J Reprod Med. 1996 Apr;41(4):242-50
references: 8728076
references: J Bone Joint Surg Br. 1988 Jan;70(1):1-12
references: 3276697
references: J Orthop Trauma. 2010 May;24(5):263-70
references: 20418730
references: Obstet Gynecol. 1976 Sep;48(3):281-6
references: 948371
references: J Bone Joint Surg Am. 1996 Nov;78(11):1632-45
references: 8934477
references: J Bone Joint Surg Br. 2011 Jul;93(7):970-4
references: 21705573
references: Clin Orthop Relat Res. 1993 Jul;(292):62-76
references: 8519138
references: Int Orthop. 2009 Apr;33(2):347-52
references: 17940767
references: Injury. 2007 Apr;38(4):431-41
references: 17445529
references: J Int Med Res. 2009 Mar-Apr;37(2):567-75
references: 19383253
references: J Trauma. 2006 Jun;60(6):1364-70
references: 16766988
references: Int Orthop. 1994 Apr;18(2):96-101
references: 8039965
references: J Trauma. 2010 Sep;69(3):483-8
references: 20838117