Influence of prosthetic design on radiocapitellar concavity-compression stability

Cholawish Chanlalit, Dave R. Shukla, James S. Fitzsimmons, Kai Nan An, Shawn W. O'Driscoll

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Background: Radial head prostheses are available with multiple geometric properties. The effect of design features on radiocapitellar stability has not been investigated. Hypothesis: The shape (depth and radius of curvature) of the articulating dish of a radial head prosthesis affects radiocapitellar stability. Materials and methods: Radiocapitellar stability due to concavity-compression was evaluated in 8 fresh frozen elbows before and after radial head replacement with 2 different designs of radial head implants (RH 1 and RH 2). Both functioned as monopolar implants. Peak forces resisting subluxation and force-displacement characteristics were compared between the 2 and to the native radial head. Results: Radial head design significantly affected radiocapitellar stability. RH 1, which had a deeper dish than RH 2, required significantly higher peak forces to subluxate the radiocapitellar joint. The peak subluxation forces and the slopes of the force-displacement curves were not significantly different from the native radial head for RH 1, but they were for RH 2. Conclusion: The shape of the articular dish (depth, radius of curvature) of a monopolar radial head implant affects its contribution to radiocapitellar stability. An implant that mimics normal anatomy is more effective than a shallow radial head implant with a radius of curvature that is longer than normal.

Original languageEnglish (US)
Pages (from-to)885-890
Number of pages6
JournalJournal of Shoulder and Elbow Surgery
Volume20
Issue number6
DOIs
StatePublished - Sep 2011

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Prostheses and Implants
Joints
Elbow
Anatomy

Keywords

  • Basic Science
  • Biomechanical Cadaver Study
  • Biomechanics
  • Elbow joint
  • Instability
  • Prosthesis
  • Radial head

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

Chanlalit, C., Shukla, D. R., Fitzsimmons, J. S., An, K. N., & O'Driscoll, S. W. (2011). Influence of prosthetic design on radiocapitellar concavity-compression stability. Journal of Shoulder and Elbow Surgery, 20(6), 885-890. https://doi.org/10.1016/j.jse.2011.03.009

Influence of prosthetic design on radiocapitellar concavity-compression stability. / Chanlalit, Cholawish; Shukla, Dave R.; Fitzsimmons, James S.; An, Kai Nan; O'Driscoll, Shawn W.

In: Journal of Shoulder and Elbow Surgery, Vol. 20, No. 6, 09.2011, p. 885-890.

Research output: Contribution to journalArticle

Chanlalit, C, Shukla, DR, Fitzsimmons, JS, An, KN & O'Driscoll, SW 2011, 'Influence of prosthetic design on radiocapitellar concavity-compression stability', Journal of Shoulder and Elbow Surgery, vol. 20, no. 6, pp. 885-890. https://doi.org/10.1016/j.jse.2011.03.009
Chanlalit, Cholawish ; Shukla, Dave R. ; Fitzsimmons, James S. ; An, Kai Nan ; O'Driscoll, Shawn W. / Influence of prosthetic design on radiocapitellar concavity-compression stability. In: Journal of Shoulder and Elbow Surgery. 2011 ; Vol. 20, No. 6. pp. 885-890.
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