Survivorship of fixed vs mobile bearing unicompartmental knee replacement: A systematic review and meta-analysis of sixty-four studies and National Joint Registries

Al-Rub, Z. Abu; Lamb, Jonathan; West, Robert; Xiao, Yang; Hu, Yang; Pandit, Hemant

doi:10.1016/j.knee.2020.09.004

Cited by 18 publications

(22 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, poor conformity and subsequent micro-motion in fixed implants may accelerate the development of AL (12). However, a recent meta-analysis by Abu Al-Rub et al which compared fixed with mobile bearing unicompartmental knee replacement did not find any difference between implant survivorship (46). A direct comparison of AL rates in cemented vs. uncemented UKAs were reported by Mohammad et al (33).…”

Section: Possible Explanation For Findingsmentioning

confidence: 99%

Incidence, temporal trends and potential risk factors for aseptic loosening following primary unicompartmental knee arthroplasty: A meta-analysis of 96,294 knees

Barrett¹,

Wilkinson²,

Blom

et al. 2021

The Knee

View full text Add to dashboard Cite

Section: Possible Explanation For Findingsmentioning

confidence: 99%

Incidence, temporal trends and potential risk factors for aseptic loosening following primary unicompartmental knee arthroplasty: A meta-analysis of 96,294 knees

Barrett¹,

Wilkinson²,

Blom

et al. 2021

The Knee

View full text Add to dashboard Cite

“…While many studies analyzed survivorship of FB-and MB-UKR and only reported second about functional outcome parameters, this present study focused primary on the clinical outcome of those designs [17,20,27,28]. Interestingly to date there are only 3 randomized control trials (RCT) comparing outcome parameters of both implant designs [33][34][35].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the revision rate of MB-UKR correlates more with surgical experience and usage of UKR [5,25,26]. In FB-UKR the most common modes of failure are polyethylene wear and progressive OA in late years [24,27]. Despite these differences in modes of failure and survivorship, a variety of studies suggesting similar functional outcomes between both designs [20,27,28].…”

Section: Introductionmentioning

confidence: 99%

“…In FB-UKR the most common modes of failure are polyethylene wear and progressive OA in late years [24,27]. Despite these differences in modes of failure and survivorship, a variety of studies suggesting similar functional outcomes between both designs [20,27,28]. Most of these publications did not consider preoperative parameters as a decisive part on postoperative functional outcome.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mobile bearing versus fixed bearing medial unicompartmental knee replacement: an independent two center matched-pairs analysis

Hariri

Hauer

Smolle

et al. 2022

Arch Orthop Trauma Surg

View full text Add to dashboard Cite

Introduction The aim of the present study was to compare clinical outcome between patients following fixed-bearing (FB) or mobile-bearing (MB) unicompartmental knee replacement (UKR) for antero-medial knee osteoarthrosis (OA) at two independent orthopedic centers. Materials and methods Matched-pairs were built between 35 patients receiving FB-UKR and 52 patients following MB-UKR regarding age at time of surgery, body mass index (BMI) and range of motion (ROM) preoperatively. Clinical and functional outcome was measured postoperatively by the American Knee Society Score (AKSS-O/AKSS-F), ROM, Tegner Activity Scale (TAS) as well as the Short Form 36 Health Survey (SF-36). Results The average treatment effect of the treated (ATT) after propensity score matching showed a significantly superior ROM in patients following MB-UKR (FB: 118°, MB: 124°). All remaining parameters had no statistically significant differences between both groups involving TAS, AKSS and SF-36. Conclusions The present study suggests that MB-UKR can provide a greater ROM compared to FB-UKR on comparable patients. The authors believe that both designs are suitable for adequate improvement of clinical outcome and ROM for patients suffering from antero-medial osteoarthrosis of the knee joint. Level of evidence Retrospective cohort study, Level IV.

show abstract

“…Mobile implants exhibit bearing dislocation as the main failure type [26]. Reports document that mobile UKA are more often revised for bearing dislocation comparing to fixed ones which are revised mainly for polyethylene wear [27]. Usually, bearing dislocations is documented to take place in the first post-operative 1 to 5 years [28] and is related to inaccurate ligament balancing or inappropriate bearing height [14].…”

Section: Atr-ftir Spectramentioning

confidence: 99%

Late Failure of a Polyethylene Unicompartmental Knee Insert -Retrieval Analysis Protocol and Results

Marinescu¹,

Lăptoiu²,

Stancu³

et al. 2022

Mater. Plast.

View full text Add to dashboard Cite

This study reports the investigation of a degraded polyethylene insert retrieved after the catastrophic failure of a mobile bearing knee implant, occurred after a traumatic event and leading to a late revision. Understanding wear mechanisms of polyethylene components is important to improve the implants for joint replacement. This model of unicompartmental arthroplasty, due to its mobile, congruent insert and design, has the potential to attain low rates of wear, leading to an improved survival of the prosthesis over fixed-bearing knee implants. During the surgical technique, however, it is critical to avoid any source of impingement or incongruent articulation, as this are associated with increased rates of polyethylene wear and may contribute to the early necessity for revision surgery. The investigated insert presented a macroscopic fragmentation, surface and bulk defects and debris. Characterization of the retrieved polyethylene implant fragments was performed by macroscopic examination, by scanning electron microscopy and Fourier transform infrared spectroscopy. Due to a systematic retrieval analysis according to current standards, we can question that, in our case, third body wear is rarely pure bone or pure cement debris related but a combination of the two mentioned. The combination enhanced contribution of polyethylene debris in severe wear initiation and progression. Complete examination of the explants exhibiting breakage or severe wear may help in understanding pathogenic ways of failure in unicompartmental knee.

show abstract

Survivorship of fixed vs mobile bearing unicompartmental knee replacement: A systematic review and meta-analysis of sixty-four studies and National Joint Registries

Abstract: This is a repository copy of Survivorship of fixed vs mobile bearing unicompartmental knee replacement: A systematic review and meta-analysis of sixty-four studies and National Joint Registries.

Cited by 18 publications

References 32 publications

Incidence, temporal trends and potential risk factors for aseptic loosening following primary unicompartmental knee arthroplasty: A meta-analysis of 96,294 knees

Incidence, temporal trends and potential risk factors for aseptic loosening following primary unicompartmental knee arthroplasty: A meta-analysis of 96,294 knees

Mobile bearing versus fixed bearing medial unicompartmental knee replacement: an independent two center matched-pairs analysis

Late Failure of a Polyethylene Unicompartmental Knee Insert -Retrieval Analysis Protocol and Results

Contact Info

Product

Resources

About