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Related Concept Videos

Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

330
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
330

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Integrating Robotic-Assisted Arthroplasty into Orthopaedic Education: The Fellows' Perspective.

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Custom Triflange Cups: 20-Year Experience.

Robert A Sershon1, James F McDonald2, Saira Nagda2

  • 1Inova Mount Vernon Hospital Joint Replacement Center, Alexandria, VA; Anderson Orthopaedic Research Institute, Alexandria, VA.

The Journal of Arthroplasty
|June 2, 2021
PubMed
Summary

Custom triflange acetabular components offer a reliable solution for severe bone loss in revision total hip arthroplasty (THA). While implant survival is good, patients must be aware of high complication rates, including infection and dislocation.

Keywords:
complex acetabular revisioncustom triflange cuplimb salvagesevere acetabular bone losstotal hip arthroplasty revision

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Area of Science:

  • Orthopedic surgery
  • Arthroplasty
  • Biomaterials

Background:

  • Custom triflange acetabular components are utilized for severe bone loss during revision total hip arthroplasty (THA).
  • Midterm outcomes show low rates of loosening and component revision.
  • However, high reoperation and overall complication rates necessitate further investigation.

Purpose of the Study:

  • To evaluate the 20-year experience at a single institution with custom triflange components in revision THA.
  • Assess implant survivorship, reoperation rates, complications, and clinical outcomes.
  • Provide insights into the efficacy and risks associated with this implant in complex cases.

Main Methods:

  • A prospective review of 50 patients undergoing revision THA with a triflanged component (2000-2018).
  • Data collected included revisions, reoperations, surgical/medical complications, Harris hip scores, and patient satisfaction.
  • Radiographic analysis assessed implant stability; phone interviews confirmed outcomes for patients with >2 years follow-up.

Main Results:

  • Significant improvement in average Harris hip scores (24 points; 49 to 73; P < .001).
  • High patient satisfaction (91%); low revision rate (1 patient).
  • High complication rate (28%), with dislocation (12%) most frequent; 2 reoperations and 1 death (pulmonary thromboembolism).

Conclusions:

  • Custom triflange components are effective for complex acetabular defects in revision THA.
  • Implant survivorship is reliable for managing severe bone loss.
  • Patients require thorough counseling regarding the significant risk of complications, particularly infection and dislocation.