Early mechanical complications of a multidirectional mobile-bearing total knee replacement

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Between April 2004 and July 2007, we performed 241 primary total knee replacements in 204 patients using the e.motion posterior cruciate-retaining, multidirectional mobile-bearing prosthesis. Of these, 100 were carried out using an image-free navigation system, and the remaining 141 with the conventional technique. We conducted a retrospective study from the prospectively collected data of these patients to assess the early results of this new mobile-bearing design. At a mean follow-up of 49 months (32 to 71), 18 knees (7.5%) had mechanical complications of which 13 required revision. Three of these had a peri-prosthetic fracture, and were removed from the study. The indication for revision in the remaining ten was loosening of the femoral component in two, tibiofemoral dislocation in three, disassociation of the polyethylene liner in four, and a broken polyethyene liner in one. There were eight further mechanically unstable knees which presented with recurrent disassociation of the polyethylene liner. There was no significant difference in the incidence of mechanical instability between the navigation-assisted procedures (8 of 99, 8.1%) and the conventionally implanted knees (10 of 139, 7.2%). In our view, the relatively high rate of mechanical complications and revision within 30 months precludes the further use of new design of knee replacement.

Original languageEnglish
Pages (from-to)479-483
Number of pages5
JournalJournal of Bone and Joint Surgery - Series B
Volume93 B
Issue number4
DOIs
Publication statusPublished - 2011 Apr 1

Fingerprint

Knee Replacement Arthroplasties
Knee
Polyethylene
Thigh
Prostheses and Implants
Retrospective Studies
Incidence

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

@article{9f9b4b50b0c7426c830ccec3bb1ef4c3,
title = "Early mechanical complications of a multidirectional mobile-bearing total knee replacement",
abstract = "Between April 2004 and July 2007, we performed 241 primary total knee replacements in 204 patients using the e.motion posterior cruciate-retaining, multidirectional mobile-bearing prosthesis. Of these, 100 were carried out using an image-free navigation system, and the remaining 141 with the conventional technique. We conducted a retrospective study from the prospectively collected data of these patients to assess the early results of this new mobile-bearing design. At a mean follow-up of 49 months (32 to 71), 18 knees (7.5{\%}) had mechanical complications of which 13 required revision. Three of these had a peri-prosthetic fracture, and were removed from the study. The indication for revision in the remaining ten was loosening of the femoral component in two, tibiofemoral dislocation in three, disassociation of the polyethylene liner in four, and a broken polyethyene liner in one. There were eight further mechanically unstable knees which presented with recurrent disassociation of the polyethylene liner. There was no significant difference in the incidence of mechanical instability between the navigation-assisted procedures (8 of 99, 8.1{\%}) and the conventionally implanted knees (10 of 139, 7.2{\%}). In our view, the relatively high rate of mechanical complications and revision within 30 months precludes the further use of new design of knee replacement.",
author = "Chih-Wei Chang and Kuo-An Lai and Chyun-Yu Yang and Sheng-Min Lan",
year = "2011",
month = "4",
day = "1",
doi = "10.1302/0301-620X.93B4.25864",
language = "English",
volume = "93 B",
pages = "479--483",
journal = "Bone and Joint Journal",
issn = "2049-4394",
publisher = "British Editorial Society of Bone and Joint Surgery",
number = "4",

}

TY - JOUR

T1 - Early mechanical complications of a multidirectional mobile-bearing total knee replacement

AU - Chang, Chih-Wei

AU - Lai, Kuo-An

AU - Yang, Chyun-Yu

AU - Lan, Sheng-Min

PY - 2011/4/1

Y1 - 2011/4/1

N2 - Between April 2004 and July 2007, we performed 241 primary total knee replacements in 204 patients using the e.motion posterior cruciate-retaining, multidirectional mobile-bearing prosthesis. Of these, 100 were carried out using an image-free navigation system, and the remaining 141 with the conventional technique. We conducted a retrospective study from the prospectively collected data of these patients to assess the early results of this new mobile-bearing design. At a mean follow-up of 49 months (32 to 71), 18 knees (7.5%) had mechanical complications of which 13 required revision. Three of these had a peri-prosthetic fracture, and were removed from the study. The indication for revision in the remaining ten was loosening of the femoral component in two, tibiofemoral dislocation in three, disassociation of the polyethylene liner in four, and a broken polyethyene liner in one. There were eight further mechanically unstable knees which presented with recurrent disassociation of the polyethylene liner. There was no significant difference in the incidence of mechanical instability between the navigation-assisted procedures (8 of 99, 8.1%) and the conventionally implanted knees (10 of 139, 7.2%). In our view, the relatively high rate of mechanical complications and revision within 30 months precludes the further use of new design of knee replacement.

AB - Between April 2004 and July 2007, we performed 241 primary total knee replacements in 204 patients using the e.motion posterior cruciate-retaining, multidirectional mobile-bearing prosthesis. Of these, 100 were carried out using an image-free navigation system, and the remaining 141 with the conventional technique. We conducted a retrospective study from the prospectively collected data of these patients to assess the early results of this new mobile-bearing design. At a mean follow-up of 49 months (32 to 71), 18 knees (7.5%) had mechanical complications of which 13 required revision. Three of these had a peri-prosthetic fracture, and were removed from the study. The indication for revision in the remaining ten was loosening of the femoral component in two, tibiofemoral dislocation in three, disassociation of the polyethylene liner in four, and a broken polyethyene liner in one. There were eight further mechanically unstable knees which presented with recurrent disassociation of the polyethylene liner. There was no significant difference in the incidence of mechanical instability between the navigation-assisted procedures (8 of 99, 8.1%) and the conventionally implanted knees (10 of 139, 7.2%). In our view, the relatively high rate of mechanical complications and revision within 30 months precludes the further use of new design of knee replacement.

UR - http://www.scopus.com/inward/record.url?scp=79953811420&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79953811420&partnerID=8YFLogxK

U2 - 10.1302/0301-620X.93B4.25864

DO - 10.1302/0301-620X.93B4.25864

M3 - Article

VL - 93 B

SP - 479

EP - 483

JO - Bone and Joint Journal

JF - Bone and Joint Journal

SN - 2049-4394

IS - 4

ER -