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Biomechanical evaluation of a low anterior wall fracture: correlation with the CT subchondral arc.

Publication ,  Journal Article
Konrath, GA; Hamel, AJ; Sharkey, NA; Bay, B; Olson, SA
Published in: J Orthop Trauma
1998

OBJECTIVE: To measure the effect of a simulated low anterior wall fracture of the acetabulum on load transmission in the hip joint. DESIGN: We measured the contact areas and pressure between the acetabulum and the femoral head of cadaveric pelves in three different conditions: intact, with an operatively created fracture of the anterior wall, and after anatomic reduction and internal fixation of the fracture. SETTING: Hips were loaded in simulated single-limb stance. Pressure and area measurements were made with Fuji pressure-sensitive film. SPECIMENS: Seven hip joints in seven whole pelves were tested. INTERVENTION: Anterior wall fractures were anatomically reduced and fixed. MAIN OUTCOME MEASUREMENTS: Contact area, load, and mean and maximum pressures were measured. RESULTS: Anterior wall fractures in our specimens entered the hip joint an average of 9.7 millimeters from the vertex of the acetabulum, corresponding to a 45-degree roof arc measurement. Peripheral loading seen in the intact acetabulum was disrupted after fracture. The loading pattern was not restored to preinjury levels with anatomic reduction and fixation. There was no significant change in the contact area (p = 0.43), force (p = 0.06), or mean (p = 0.57) or maximum (p = 0.20) pressures in the superior aspect of the acetabulum after creation of the anterior wall fracture. CONCLUSIONS: These results differ from those of previous studies with posterior wall acetabulum fractures, where significant increases in force and mean and maximum pressures were noted in the superior acetabulum after fracture. The lack of significant increases in superior acetabular pressures is discussed in relation to the mean computed tomographic subchondral arc of approximately ten millimeters in our specimens.

Duke Scholars

Published In

J Orthop Trauma

DOI

ISSN

0890-5339

Publication Date

1998

Volume

12

Issue

3

Start / End Page

152 / 158

Location

United States

Related Subject Headings

  • Pressure
  • Orthopedics
  • Humans
  • Hip Joint
  • Fractures, Bone
  • Cadaver
  • Biomechanical Phenomena
  • Acetabulum
  • 1103 Clinical Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Konrath, G. A., Hamel, A. J., Sharkey, N. A., Bay, B., & Olson, S. A. (1998). Biomechanical evaluation of a low anterior wall fracture: correlation with the CT subchondral arc. J Orthop Trauma, 12(3), 152–158. https://doi.org/10.1097/00005131-199803000-00003
Konrath, G. A., A. J. Hamel, N. A. Sharkey, B. Bay, and S. A. Olson. “Biomechanical evaluation of a low anterior wall fracture: correlation with the CT subchondral arc.J Orthop Trauma 12, no. 3 (1998): 152–58. https://doi.org/10.1097/00005131-199803000-00003.
Konrath GA, Hamel AJ, Sharkey NA, Bay B, Olson SA. Biomechanical evaluation of a low anterior wall fracture: correlation with the CT subchondral arc. J Orthop Trauma. 1998;12(3):152–8.
Konrath, G. A., et al. “Biomechanical evaluation of a low anterior wall fracture: correlation with the CT subchondral arc.J Orthop Trauma, vol. 12, no. 3, 1998, pp. 152–58. Pubmed, doi:10.1097/00005131-199803000-00003.
Konrath GA, Hamel AJ, Sharkey NA, Bay B, Olson SA. Biomechanical evaluation of a low anterior wall fracture: correlation with the CT subchondral arc. J Orthop Trauma. 1998;12(3):152–158.

Published In

J Orthop Trauma

DOI

ISSN

0890-5339

Publication Date

1998

Volume

12

Issue

3

Start / End Page

152 / 158

Location

United States

Related Subject Headings

  • Pressure
  • Orthopedics
  • Humans
  • Hip Joint
  • Fractures, Bone
  • Cadaver
  • Biomechanical Phenomena
  • Acetabulum
  • 1103 Clinical Sciences