Influence of posterior condylar offset on knee flexion after cruciate-sacrificing mobile-bearing total knee replacement: A prospective analysis of 410 consecutive cases

Having demonstrated in Chapter 2 that a fully conforming mobile bearing can minimise polyethylene wear, in this chapter we show that a mobile bearing prosthesis, unconstrained in the sagittal plane, can restore natural mobility and stability. For surgeon readers who are less interested in the theoretical background, it might be advisable to go straight to Chapter 4, Indications, or to start by reading the final section of this chapter, The Loaded Prosthetic Knee. If that proves interesting, the surgeon might attempt The Unloaded Prosthetic Knee. For the more research minded surgeon or engineer, it seems more logical to start with the Unloaded Natural Knee (the longest section of the chapter) and to read from there. The chapter may also be of interest to those surgeons embarking on the use of a bi-cruciate retaining total knee replacement.

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Preoperative Low Back Pain Affects Recovery in Knee Flexion Range of Motion Following Total Knee Replacement

Critical Reviews in Physical and Rehabilitation Medicine ◽

10.1615/critrevphysrehabilmed.2016018885 ◽

2016 ◽

Vol 28 (1-2) ◽

pp. 47-55

Author(s):

Hannah M. Ashworth ◽

Christian N. Warner ◽

Saurabh P Mehta ◽

Franklin D. Shuler ◽

Ali Oliashirazi

Keyword(s):

Low Back Pain ◽

Back Pain ◽

Total Knee Replacement ◽

Range Of Motion ◽

Knee Replacement ◽

Knee Flexion ◽

Low Back ◽

Total Knee

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Fulfilment of preoperative expectations and postoperative patient satisfaction after total knee replacement. A prospective analysis of 200 patients

The Knee ◽

10.1016/j.knee.2019.07.018 ◽

2019 ◽

Vol 26 (6) ◽

pp. 1403-1412 ◽

Cited By ~ 8

Author(s):

Angela H. Deakin ◽

Marie Anne Smith ◽

David T. Wallace ◽

Elizabeth J. Smith ◽

Martin Sarungi

Keyword(s):

Patient Satisfaction ◽

Total Knee Replacement ◽

Knee Replacement ◽

Prospective Analysis ◽

Postoperative Patient ◽

Total Knee ◽

Preoperative Expectations

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Knee Flexion and Daily Activities in Patients following Total Knee Replacement: A Comparison with ISO Standard 14243

BioMed Research International ◽

10.1155/2015/157541 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 9

Author(s):

Markus A. Wimmer ◽

William Nechtow ◽

Thorsten Schwenke ◽

Kirsten C. Moisio

Keyword(s):

Total Knee Replacement ◽

Knee Replacement ◽

Knee Flexion ◽

Daily Activities ◽

Wear Testing ◽

Significant Difference ◽

Flexion Extension ◽

Total Knee ◽

Stair Walking ◽

The Many

Walking is only one of many daily activities performed by patients following total knee replacement (TKR). The purpose of this study was to examine the hypotheses (a) that subject activity characteristics are correlated with knee flexion range of motion (ROM) and (b) that there is a significant difference between the subject’s flexion/extension excursion throughout the day and the ISO specified input for knee wear testing. In order to characterize activity, the number of walking and stair stepping cycles, the time spent with dynamic and stationary activities, the number of activity sequences, and the knee flexion/extension excursion of 32 TKR subjects were collected during daily activity. Flexion/extension profiles were compared with the ISO 14243 simulator input profile using a level crossing classification algorithm. Subjects took an average of 3102 (range: 343–5857) walking cycles including 65 (range: 0–319) stair stepping cycles. Active and passive ROMs were positively correlated with stair walking time, stair step counts, and stair walking sequences. Simulated knee motion according to ISO showed significantly fewer level crossings at the flexion angles 20–40° and beyond 50° than those measured with the monitor. This suggests that implant wear testing protocols should contain more cycles and a variety of activities requiring higher knee flexion angles with incorporated resting/transition periods to account for the many activity sequences.

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