Effect of patella thickness on patella strain following total knee arthroplasty

J. D. Reuben., C. L. McDonald, P. L. Woodard, L. J. Hennington

Research output: Contribution to journalArticle

110 Citations (Scopus)

Abstract

Patellar complications following total knee arthroplasty (TKA) have begun to emerge as a major cause of failure. In an effort to understand some of the mechanical factors that might contribute to patellar component failure, biomechanical study was performed. Quadriceps force and anterior patellar strain were measured during dynamic flexion in 10 fresh, paired human cadaver knee joints. First, tests were performed in the intact knee, followed by either posterior cruciate ligament (PCL) retention or sacrifice of TKA without patellar resurfacing. Tests were then performed following patellar resurfacing with an overly thick, optimum and thin, bony patella. Patellar strain increased in each specimen (with flexion angles of up to 80°), was most pronounced as the bony patella became thinner, was closest to the intact knee when the patella was not resurfaced, and was unaffected by PCL retention or sacrifice. Patellar osteotomy, resulting in a bony patellar thickness of less than 15 mm, resulted in significantly increased strain. TKA systems should include instrumentation that allows precise restoration of overall patellar thickness while maintaining a bony patellar thickness of at least 15 mm.

Original languageEnglish (US)
Pages (from-to)251-258
Number of pages8
JournalJournal of Arthroplasty
Volume6
Issue number3
StatePublished - 1991
Externally publishedYes

Fingerprint

Knee Replacement Arthroplasties
Patella
Posterior Cruciate Ligament
Knee
Knee Joint
Osteotomy
Cadaver

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Surgery

Cite this

Reuben., J. D., McDonald, C. L., Woodard, P. L., & Hennington, L. J. (1991). Effect of patella thickness on patella strain following total knee arthroplasty. Journal of Arthroplasty, 6(3), 251-258.

Effect of patella thickness on patella strain following total knee arthroplasty. / Reuben., J. D.; McDonald, C. L.; Woodard, P. L.; Hennington, L. J.

In: Journal of Arthroplasty, Vol. 6, No. 3, 1991, p. 251-258.

Research output: Contribution to journalArticle

Reuben., JD, McDonald, CL, Woodard, PL & Hennington, LJ 1991, 'Effect of patella thickness on patella strain following total knee arthroplasty', Journal of Arthroplasty, vol. 6, no. 3, pp. 251-258.
Reuben. JD, McDonald CL, Woodard PL, Hennington LJ. Effect of patella thickness on patella strain following total knee arthroplasty. Journal of Arthroplasty. 1991;6(3):251-258.
Reuben., J. D. ; McDonald, C. L. ; Woodard, P. L. ; Hennington, L. J. / Effect of patella thickness on patella strain following total knee arthroplasty. In: Journal of Arthroplasty. 1991 ; Vol. 6, No. 3. pp. 251-258.
@article{4dde56031c4a459d9b487ebadac8bc6a,
title = "Effect of patella thickness on patella strain following total knee arthroplasty",
abstract = "Patellar complications following total knee arthroplasty (TKA) have begun to emerge as a major cause of failure. In an effort to understand some of the mechanical factors that might contribute to patellar component failure, biomechanical study was performed. Quadriceps force and anterior patellar strain were measured during dynamic flexion in 10 fresh, paired human cadaver knee joints. First, tests were performed in the intact knee, followed by either posterior cruciate ligament (PCL) retention or sacrifice of TKA without patellar resurfacing. Tests were then performed following patellar resurfacing with an overly thick, optimum and thin, bony patella. Patellar strain increased in each specimen (with flexion angles of up to 80°), was most pronounced as the bony patella became thinner, was closest to the intact knee when the patella was not resurfaced, and was unaffected by PCL retention or sacrifice. Patellar osteotomy, resulting in a bony patellar thickness of less than 15 mm, resulted in significantly increased strain. TKA systems should include instrumentation that allows precise restoration of overall patellar thickness while maintaining a bony patellar thickness of at least 15 mm.",
author = "Reuben., {J. D.} and McDonald, {C. L.} and Woodard, {P. L.} and Hennington, {L. J.}",
year = "1991",
language = "English (US)",
volume = "6",
pages = "251--258",
journal = "Journal of Arthroplasty",
issn = "0883-5403",
publisher = "Churchill Livingstone",
number = "3",

}

TY - JOUR

T1 - Effect of patella thickness on patella strain following total knee arthroplasty

AU - Reuben., J. D.

AU - McDonald, C. L.

AU - Woodard, P. L.

AU - Hennington, L. J.

PY - 1991

Y1 - 1991

N2 - Patellar complications following total knee arthroplasty (TKA) have begun to emerge as a major cause of failure. In an effort to understand some of the mechanical factors that might contribute to patellar component failure, biomechanical study was performed. Quadriceps force and anterior patellar strain were measured during dynamic flexion in 10 fresh, paired human cadaver knee joints. First, tests were performed in the intact knee, followed by either posterior cruciate ligament (PCL) retention or sacrifice of TKA without patellar resurfacing. Tests were then performed following patellar resurfacing with an overly thick, optimum and thin, bony patella. Patellar strain increased in each specimen (with flexion angles of up to 80°), was most pronounced as the bony patella became thinner, was closest to the intact knee when the patella was not resurfaced, and was unaffected by PCL retention or sacrifice. Patellar osteotomy, resulting in a bony patellar thickness of less than 15 mm, resulted in significantly increased strain. TKA systems should include instrumentation that allows precise restoration of overall patellar thickness while maintaining a bony patellar thickness of at least 15 mm.

AB - Patellar complications following total knee arthroplasty (TKA) have begun to emerge as a major cause of failure. In an effort to understand some of the mechanical factors that might contribute to patellar component failure, biomechanical study was performed. Quadriceps force and anterior patellar strain were measured during dynamic flexion in 10 fresh, paired human cadaver knee joints. First, tests were performed in the intact knee, followed by either posterior cruciate ligament (PCL) retention or sacrifice of TKA without patellar resurfacing. Tests were then performed following patellar resurfacing with an overly thick, optimum and thin, bony patella. Patellar strain increased in each specimen (with flexion angles of up to 80°), was most pronounced as the bony patella became thinner, was closest to the intact knee when the patella was not resurfaced, and was unaffected by PCL retention or sacrifice. Patellar osteotomy, resulting in a bony patellar thickness of less than 15 mm, resulted in significantly increased strain. TKA systems should include instrumentation that allows precise restoration of overall patellar thickness while maintaining a bony patellar thickness of at least 15 mm.

UR - http://www.scopus.com/inward/record.url?scp=0026051644&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026051644&partnerID=8YFLogxK

M3 - Article

VL - 6

SP - 251

EP - 258

JO - Journal of Arthroplasty

JF - Journal of Arthroplasty

SN - 0883-5403

IS - 3

ER -