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Improving pre-operative planning for complex total hip replacement with a Rapid Prototype model enabling surgical

S-H Won1, Y-K Lee, Y-C Ha

  • 1Seoul National University Bundang Hospital, Department of Orthopaedic Surgery, 166 Gumi-ro, Bundang-gu, Seongnam-si 463-707, South Korea.

The Bone & Joint Journal
|October 24, 2013
PubMed
Summary

Rapid Prototype (RP) models aid pre-operative planning for total hip replacement (THR) in complex cases. These 3D models accurately predict acetabular component size and position, improving surgical outcomes.

Keywords:
Complex total hip arthroplastyPre-operative planningRapid prototype modelTHRTotal hip replacement

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Radiology

Background:

  • Pre-operative planning for total hip replacement (THR) is complex in severe acetabular deformities.
  • Conditions like hypoplastic acetabulum, severe defects, arthrodesis, or ankylosis present significant challenges.

Purpose of the Study:

  • To evaluate the utility of Rapid Prototype (RP) models in pre-operative planning for THR in complex acetabular deformities.
  • To assess the accuracy of RP models in determining THR feasibility, acetabular component size, and positioning.

Main Methods:

  • RP models were created from 3D CT scans for 21 complex hip cases.
  • THR was planned using these life-sized models.
  • Surgical outcomes and component accuracy were assessed.

Main Results:

  • Successful THR was completed in all 21 hips.
  • Acetabular component size was predicted within 2 mm in 80.9% of cases.
  • Radiological evidence of bone ingrowth and stability was observed in all components and stems at follow-up.

Conclusions:

  • RP models are valuable tools for pre-operative planning in complex THR cases.
  • They aid in determining surgical feasibility and guiding decisions on implant type, size, and position.
  • RP models enhance surgical planning accuracy and potentially improve outcomes in challenging hip deformities.