title: Biomechanical analysis of the acetabular buttress-plate: are complex acetabular fractures in the quadrilateral area stable after treatment with anterior construct plate-1/3 tube buttress plate fixation?
abstract: OBJECTIVE
  The acetabular buttress-plate has been widely used in treating difficult cases with satisfying clinical results. However, the biomechanical properties of a postoperative acetabular fracture fixed by the buttress-plate are not clear. The purpose of this study was to evaluate the biomechanical properties of stability after the anterior tube buttress-plate fixation of complex acetabular fractures in the quadrilateral area.
  
  
  METHODS
  A construct was proposed based on anterior construct plate - 1/3 tube buttress plate fixation for acetabular both-column fractures. Two groups of six formalin-preserved cadaveric pelvises were analyzed: (1) group A, the normal pelvis and (2) group B, anterior construct plate-1/3 tube buttress plate with quadrilateral area fixation. The displacements were measured, and cyclical loads were applied in both standing and sitting simulations.
  
  
  RESULTS
  As the load was added, the displacements were A<B, increasing in line. In the 600 N physiological loading, the differences were significant (standing position: p=0.013; sitting position: p=0.009) between groups A and B.
  
  
  CONCLUSIONS
  The anterior construct plate - 1/3 tube buttress plate fixation provided a better stable construct for early sitting. The standing mode yielded more significant differences between the groups. Placing a 1/3 tube buttress-plate via an anterior approach is a novel method of providing quadrilateral area support in this setting.
authors.affiliation: Department of Orthopedics, Wuhan General Hospital of Guangzhou Command, Southern Medical University, Wuhan, People's Republic of China.
authors.forename: Yong-De
authors.initials: YD
authors.lastname: Wu
authors.forename: Xian-Hua
authors.initials: XH
authors.lastname: Cai
authors.forename: Xi-Ming
authors.initials: XM
authors.lastname: Liu
authors.forename: Hong-Xi
authors.initials: HX
authors.lastname: Zhang
mesh_terms: D000077:Acetabulum / Q000293:injuries*; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D001860:Bone Plates; D005593:Fracture Fixation, Internal / Q000379:methods*; D050723:Fractures, Bone / Q000601:surgery*; D006801:Humans; D004204:Joint Dislocations; D012016:Reference Values; D015203:Reproducibility of Results
references.citation: Injury. 2012 Jun;43(6):917-20
references.pmid: 22391293
references.citation: J Bone Joint Surg Am. 1996 Nov;78(11):1632-45
references.pmid: 8934477
references.citation: J Bone Joint Surg Br. 2010 Feb;92(2):250-7
references.pmid: 20130318
references.citation: Can J Surg. 2009 Jun;52(3):221-8
references.pmid: 19503667
references.citation: J Orthop Trauma. 2012 May;26(5):284-9
references.pmid: 21926638
references.citation: Clin Orthop Relat Res. 1998 Jul;(352):215-22
references.pmid: 9678050
references.citation: J Med Assoc Thai. 2000 May;83(5):483-93
references.pmid: 10863893
references.citation: Clin Orthop Relat Res. 1994 Aug;(305):112-23
references.pmid: 8050220
references.citation: J Trauma. 1989 Nov;29(11):1494-6
references.pmid: 2585559
references.citation: Arch Phys Med Rehabil. 2012 Nov;93(11):2015-21
references.pmid: 22475054
references.citation: Injury. 2007 Apr;38(4):497-508
references.pmid: 17399713
references.citation: Injury. 2010 Nov;41(11):1145-9
references.pmid: 20828690
references.citation: J Arthroplasty. 2013 Jan;28(1):178-86
references.pmid: 22595181
references.citation: J Orthop Trauma. 2010 May;24(5):323-8
references.pmid: 20418739
references.citation: J Bone Joint Surg Br. 2011 Feb;93(2):229-36
references.pmid: 21282764
references.citation: Injury. 2011 Oct;42(10):1130-4
references.pmid: 21156315