3D Printing Aids Acetabular Reconstruction in Complex Revision Hip Arthroplasty

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Radiology

Background:

• Revision hip arthroplasty presents challenges due to abnormal bony anatomy.
• Advances in imaging and manufacturing enable detailed 3D anatomical representations.

Purpose of the Study:

• To evaluate the utility of life-size 3D printed models for preoperative planning in complex revision hip arthroplasty.
• To assess the impact of 3D models on anatomical appreciation and surgical decision-making.

Main Methods:

• Life-size 3D models were created from computed tomography (CT) scans of three hip joints in two patients with complex deformities.
• Models were manufactured using selective laser sintering after image import and artifact reduction.
• Preoperative templating, implant sizing (acetabular cup, augment, buttress, cage), and screw trajectory simulation were performed using the 3D models.

Main Results:

• 3D models provided visual and tactile feedback, enhancing appreciation of complex pelvic deformities.
• Accurate surgical simulation using models improved preoperative decision-making and planning.
• Screw trajectory simulation reduced the risk of neurovascular injury.

Conclusions:

• 3D printing technology facilitates better evaluation and treatment of complex pelvic deformities with improved precision.
• Life-size 3D models are invaluable tools for accurate surgical simulation, anatomical appreciation, and preoperative planning in revision hip arthroplasty.
• The technique demonstrates accuracy and cost-effectiveness, offering significant benefits to clinical practice.