Importance of a radial head component in sorbie unlinked total elbow arthroplasty

Katsunori Inagaki, Shawn W. O'Driscoll, Patricia G. Neale, Eiichi Uchiyama, Bernard F. Morrey, Kai Nan An

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The effects of a radial head component on total elbow arthroplasty kinematics and stability were evaluated using an anatomic design unlinked total elbow prosthesis. An electromagnetic tracking device recorded motion and varus and valgus displacements under various conditions in 10 cadaveric elbows. The motion patterns of the intact elbows and the Sorbie-QuestorTM total elbow prostheses with a radial head component were similar, as both tended to have a valgus position in extension, varus at midflexion, and more valgus toward full flexion. Under conditions of simulated muscle loading, the maximum valgus and varus laxity of the elbowbow prosthesis was, on average, 8.6° ± 4.0° greater than normal. Without the radial head component, however, significant kinematic disturbances and instabilities were seen. The varus and valgus displacements were 13.3° ± 5.5° greater than the intact elbows. One total elbow arthroplasty without a radial head dislocated during testing. Increasing the muscle loading across the elbow significantly enhanced dynamic stability of the total elbow arthroplasties, especially in the extension half of elbow motion where instability is greatest. However, this dynamic enhancement of stability was seen only in those elbows in which the radial head component had been implanted. The radial head component is an important stabilizer, particularly in extension for this prosthesis, and possibly for other unlinked total elbow prostheses. Although instability of unlinked prostheses depends on the prosthetic design, the use of a radial head replacement may be an important factor in preventing such instability. Perhaps even more importantly, a radial head component balances the load distribution across the articulation, which could decrease stress on the ulnohumeral articulation and therefore possibly reduce polyethylene wear, osteolysis, and loosening.

Original languageEnglish (US)
Pages (from-to)123-131
Number of pages9
JournalClinical Orthopaedics and Related Research
Issue number400
StatePublished - 2002

Fingerprint

Elbow
Arthroplasty
Elbow Prosthesis
Prostheses and Implants
Biomechanical Phenomena
Muscles
Osteolysis
Electromagnetic Phenomena
Polyethylene
Equipment and Supplies

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Inagaki, K., O'Driscoll, S. W., Neale, P. G., Uchiyama, E., Morrey, B. F., & An, K. N. (2002). Importance of a radial head component in sorbie unlinked total elbow arthroplasty. Clinical Orthopaedics and Related Research, (400), 123-131.

Importance of a radial head component in sorbie unlinked total elbow arthroplasty. / Inagaki, Katsunori; O'Driscoll, Shawn W.; Neale, Patricia G.; Uchiyama, Eiichi; Morrey, Bernard F.; An, Kai Nan.

In: Clinical Orthopaedics and Related Research, No. 400, 2002, p. 123-131.

Research output: Contribution to journalArticle

Inagaki, K, O'Driscoll, SW, Neale, PG, Uchiyama, E, Morrey, BF & An, KN 2002, 'Importance of a radial head component in sorbie unlinked total elbow arthroplasty', Clinical Orthopaedics and Related Research, no. 400, pp. 123-131.
Inagaki K, O'Driscoll SW, Neale PG, Uchiyama E, Morrey BF, An KN. Importance of a radial head component in sorbie unlinked total elbow arthroplasty. Clinical Orthopaedics and Related Research. 2002;(400):123-131.
Inagaki, Katsunori ; O'Driscoll, Shawn W. ; Neale, Patricia G. ; Uchiyama, Eiichi ; Morrey, Bernard F. ; An, Kai Nan. / Importance of a radial head component in sorbie unlinked total elbow arthroplasty. In: Clinical Orthopaedics and Related Research. 2002 ; No. 400. pp. 123-131.
@article{e4f1088ba4b8454a90a55c526956be2d,
title = "Importance of a radial head component in sorbie unlinked total elbow arthroplasty",
abstract = "The effects of a radial head component on total elbow arthroplasty kinematics and stability were evaluated using an anatomic design unlinked total elbow prosthesis. An electromagnetic tracking device recorded motion and varus and valgus displacements under various conditions in 10 cadaveric elbows. The motion patterns of the intact elbows and the Sorbie-QuestorTM total elbow prostheses with a radial head component were similar, as both tended to have a valgus position in extension, varus at midflexion, and more valgus toward full flexion. Under conditions of simulated muscle loading, the maximum valgus and varus laxity of the elbowbow prosthesis was, on average, 8.6° ± 4.0° greater than normal. Without the radial head component, however, significant kinematic disturbances and instabilities were seen. The varus and valgus displacements were 13.3° ± 5.5° greater than the intact elbows. One total elbow arthroplasty without a radial head dislocated during testing. Increasing the muscle loading across the elbow significantly enhanced dynamic stability of the total elbow arthroplasties, especially in the extension half of elbow motion where instability is greatest. However, this dynamic enhancement of stability was seen only in those elbows in which the radial head component had been implanted. The radial head component is an important stabilizer, particularly in extension for this prosthesis, and possibly for other unlinked total elbow prostheses. Although instability of unlinked prostheses depends on the prosthetic design, the use of a radial head replacement may be an important factor in preventing such instability. Perhaps even more importantly, a radial head component balances the load distribution across the articulation, which could decrease stress on the ulnohumeral articulation and therefore possibly reduce polyethylene wear, osteolysis, and loosening.",
author = "Katsunori Inagaki and O'Driscoll, {Shawn W.} and Neale, {Patricia G.} and Eiichi Uchiyama and Morrey, {Bernard F.} and An, {Kai Nan}",
year = "2002",
language = "English (US)",
pages = "123--131",
journal = "Clinical Orthopaedics and Related Research",
issn = "0009-921X",
publisher = "Springer New York",
number = "400",

}

TY - JOUR

T1 - Importance of a radial head component in sorbie unlinked total elbow arthroplasty

AU - Inagaki, Katsunori

AU - O'Driscoll, Shawn W.

AU - Neale, Patricia G.

AU - Uchiyama, Eiichi

AU - Morrey, Bernard F.

AU - An, Kai Nan

PY - 2002

Y1 - 2002

N2 - The effects of a radial head component on total elbow arthroplasty kinematics and stability were evaluated using an anatomic design unlinked total elbow prosthesis. An electromagnetic tracking device recorded motion and varus and valgus displacements under various conditions in 10 cadaveric elbows. The motion patterns of the intact elbows and the Sorbie-QuestorTM total elbow prostheses with a radial head component were similar, as both tended to have a valgus position in extension, varus at midflexion, and more valgus toward full flexion. Under conditions of simulated muscle loading, the maximum valgus and varus laxity of the elbowbow prosthesis was, on average, 8.6° ± 4.0° greater than normal. Without the radial head component, however, significant kinematic disturbances and instabilities were seen. The varus and valgus displacements were 13.3° ± 5.5° greater than the intact elbows. One total elbow arthroplasty without a radial head dislocated during testing. Increasing the muscle loading across the elbow significantly enhanced dynamic stability of the total elbow arthroplasties, especially in the extension half of elbow motion where instability is greatest. However, this dynamic enhancement of stability was seen only in those elbows in which the radial head component had been implanted. The radial head component is an important stabilizer, particularly in extension for this prosthesis, and possibly for other unlinked total elbow prostheses. Although instability of unlinked prostheses depends on the prosthetic design, the use of a radial head replacement may be an important factor in preventing such instability. Perhaps even more importantly, a radial head component balances the load distribution across the articulation, which could decrease stress on the ulnohumeral articulation and therefore possibly reduce polyethylene wear, osteolysis, and loosening.

AB - The effects of a radial head component on total elbow arthroplasty kinematics and stability were evaluated using an anatomic design unlinked total elbow prosthesis. An electromagnetic tracking device recorded motion and varus and valgus displacements under various conditions in 10 cadaveric elbows. The motion patterns of the intact elbows and the Sorbie-QuestorTM total elbow prostheses with a radial head component were similar, as both tended to have a valgus position in extension, varus at midflexion, and more valgus toward full flexion. Under conditions of simulated muscle loading, the maximum valgus and varus laxity of the elbowbow prosthesis was, on average, 8.6° ± 4.0° greater than normal. Without the radial head component, however, significant kinematic disturbances and instabilities were seen. The varus and valgus displacements were 13.3° ± 5.5° greater than the intact elbows. One total elbow arthroplasty without a radial head dislocated during testing. Increasing the muscle loading across the elbow significantly enhanced dynamic stability of the total elbow arthroplasties, especially in the extension half of elbow motion where instability is greatest. However, this dynamic enhancement of stability was seen only in those elbows in which the radial head component had been implanted. The radial head component is an important stabilizer, particularly in extension for this prosthesis, and possibly for other unlinked total elbow prostheses. Although instability of unlinked prostheses depends on the prosthetic design, the use of a radial head replacement may be an important factor in preventing such instability. Perhaps even more importantly, a radial head component balances the load distribution across the articulation, which could decrease stress on the ulnohumeral articulation and therefore possibly reduce polyethylene wear, osteolysis, and loosening.

UR - http://www.scopus.com/inward/record.url?scp=0036301659&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036301659&partnerID=8YFLogxK

M3 - Article

SP - 123

EP - 131

JO - Clinical Orthopaedics and Related Research

JF - Clinical Orthopaedics and Related Research

SN - 0009-921X

IS - 400

ER -