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Related Experiment Video

Updated: May 30, 2026

Reverse Total Shoulder Arthroplasty
10:10

Reverse Total Shoulder Arthroplasty

Published on: July 5, 2011

Does glenoid baseplate geometry affect its fixation in reverse shoulder arthroplasty?

Jaison James1, Kayla R Huffman, Frederick W Werner

  • 1Department of Orthopedic Surgery, SUNY Upstate Medical University, Syracuse, NY 13210, USA.

Journal of Shoulder and Elbow Surgery
|July 23, 2011
PubMed
Summary

A convex glenoid baseplate offers greater bone contact in reverse shoulder arthroplasty. However, a flat baseplate design removes less bone and provides better screw engagement, making it preferable in certain situations.

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Anatomy

Background:

  • Glenoid baseplate geometry's impact on reverse shoulder arthroplasty outcomes is not well-understood.
  • This study compares flat-backed and convex-backed glenoid baseplate designs.

Purpose of the Study:

  • To compare flat-backed versus convex-backed glenoid baseplates.
  • To evaluate bone interface area, screw engagement, and bone volume removed.
  • Utilize 3D modeling for analysis.

Main Methods:

  • 3D scapula models were used for virtual implantation of baseplates.
  • Reaming was performed in 1 mm increments up to 5 mm.
  • Calculated screw engagement and bone removal for each design.

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Related Experiment Videos

Last Updated: May 30, 2026

Reverse Total Shoulder Arthroplasty
10:10

Reverse Total Shoulder Arthroplasty

Published on: July 5, 2011

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve
09:51

The Transition to an Anterior-Based Muscle Sparing Approach Improves Early Postoperative Function but is Associated with a Learning Curve

Published on: September 7, 2022

Main Results:

  • Convex baseplates required significantly more bone removal than flat baseplates (P = .003).
  • Convex baseplates had greater bone contact area (P = .004), but less screw engagement (P = .026).
  • Flat baseplates showed a decrease in fixation area after 1 mm reaming.

Conclusions:

  • Convex baseplates enhance bone-implant contact surface area.
  • Flat baseplates are favored for better screw engagement and reduced bone removal.
  • The choice of baseplate depends on achieving adequate bone-implant contact.