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Three dimensional scapular prints for evaluating glenoid morphology: An exploratory study.

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Summary
This summary is machine-generated.

Three-dimensional (3D) models accurately represent scapular anatomy for total shoulder arthroplasty (TSA) planning. While glenoid version and width show high accuracy, 3D prints offer superior definition for glenoid height compared to CT scans.

Keywords:
3D printingCT scansGlenoidRetroversionScapulaShoulder replacement

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Medical Imaging

Background:

  • Conventional Computerised Tomography (CT) scans are standard for assessing glenoid morphology before total shoulder arthroplasty (TSA).
  • This study investigates the utility of three-dimensional (3D) models for evaluating glenoid morphology.

Purpose of the Study:

  • To evaluate the accuracy of 3D printed scapular models derived from CT scans for preoperative assessment of glenoid morphology in patients undergoing TSA.
  • To compare measurements of glenoid version, height, width, and acromion length between 3D models and original CT scans.

Main Methods:

  • CT scans from 32 patients scheduled for TSA were used to create 3D scapular models via custom software and desktop 3D printing.
  • Key anatomical parameters including glenoid version, maximum height and width, and acromion antero-posterior (AP) length were measured and compared between the 3D models and the original CT scans.

Main Results:

  • 3D models provided an accurate qualitative representation of scapular anatomy.
  • While glenoid version and width showed no significant differences between models and scans, glenoid height measurements were significantly more accurate in the 3D models (p=0.004).
  • High inter-examiner correlation (0.94-0.99) was observed for all measured parameters.

Conclusions:

  • 3D printing technology is a valuable tool for preoperative planning in TSA, offering accurate reproduction of transverse plane anatomy.
  • 3D prints provide enhanced definition of anatomical measures, particularly glenoid height, surpassing the capabilities of conventional CT scans.