Primary stability of inferior tilt fixation of the glenoid component in reverse total shoulder arthroplasty

A finite element study

Soo Won Chae, Haea Lee, Soo Min Kim, Juneyoung Lee, Seung Ho Han, Soung Yon Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Glenoid component fixation with inferior tilt has been suggested as one of the surgical methods to decrease scapular notching and improve stability, but its clinically beneficial effect remains a concern. We evaluated the influence of inferior tilt fixation of the glenoid component on primary stability in reverse total shoulder arthroplasty by finite element analysis. Finite element models were constructed from cadaveric scapulae of females over the age of 60 years and glenoid components from reverse total shoulder arthroplasty. The relative micromotion at the bone-glenoid component interface, distribution of bone stress under the glenoid component and around the screws, contact area between the bone and screws, and cut surface area of the cancellous bone exposed after glenoid reaming were analyzed and compared between a neutral and 10° inferior tilt fixation of the glenoid component. The 10° inferior tilt fixation demonstrated greater relative micromotion and higher bone stress than the neutral tilt fixation. Eccentric reaming, which is done to produce the inferior tilt fixation of the glenoid component, increased glenoid cancellous bone exposure and decreased bone-screws contact area. Inferior tilt fixation of the glenoid component may adversely affect primary stability and longevity after reverse total shoulder arthroplasty.

Original languageEnglish
Pages (from-to)1061-1068
Number of pages8
JournalJournal of Orthopaedic Research
Volume34
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

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Bone Screws
Arthroplasty
Bone and Bones
Scapula
Finite Element Analysis
Cancellous Bone

Keywords

  • finite element analysis
  • glenoid component
  • inferior tilt
  • primary stability
  • reverse total shoulder arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Primary stability of inferior tilt fixation of the glenoid component in reverse total shoulder arthroplasty : A finite element study. / Chae, Soo Won; Lee, Haea; Kim, Soo Min; Lee, Juneyoung; Han, Seung Ho; Kim, Soung Yon.

In: Journal of Orthopaedic Research, Vol. 34, No. 6, 01.06.2016, p. 1061-1068.

Research output: Contribution to journalArticle

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