Abstract
Outcomes of all polyethylene tibia components shown to be equal to modular metal backed components in Total Knee Arthroplasty in patients over 70.
Introduction:
The total knee replacement (TKR) is one of the most common operations offered in the United Kingdom, with approximately 90,000 performed each year. The tibial component used can either be an all polyethylene monobloc implant or a metal backed implant. This study aims to compare the 5-year outcomes of all polyethylene tibial components to metal backed components in patients aged over 70.
Methods:
A group of 130 patients who had received an all polyethylene tibial component was matched on demographic factors of age, BMI, ASA, gender and pre-operative Knee Society Score to create a similar group of 130 patients who received a metal backed tibial component. The outcomes during the immediate post-operative stage and at 5 years were compared.
Results:
There was no statistically significant difference in the time taken for operation, haemoglobin drop or transfusion rate. The all polyethylene group had a longer length of stay in hospital. In 5-year outcomes there was no significant difference in revision rate, survival of patients, oxford knee score, knee society score, SF-12 score or range of movement.
Conclusion:
The study has shown that all polyethylene tibial components have equivocal outcomes to metal backed components. A cost analysis for our institution, in using the all polyethylene procedure, shows a substantial financial saving can be made with no detrimental effects to the patient. This study recommends their use should be more widely considered, particularly for older patients.
Introduction:
The total knee replacement (TKR) is one of the most common operations offered in the United Kingdom, with approximately 90,000 performed each year. The tibial component used can either be an all polyethylene monobloc implant or a metal backed implant. This study aims to compare the 5-year outcomes of all polyethylene tibial components to metal backed components in patients aged over 70.
Methods:
A group of 130 patients who had received an all polyethylene tibial component was matched on demographic factors of age, BMI, ASA, gender and pre-operative Knee Society Score to create a similar group of 130 patients who received a metal backed tibial component. The outcomes during the immediate post-operative stage and at 5 years were compared.
Results:
There was no statistically significant difference in the time taken for operation, haemoglobin drop or transfusion rate. The all polyethylene group had a longer length of stay in hospital. In 5-year outcomes there was no significant difference in revision rate, survival of patients, oxford knee score, knee society score, SF-12 score or range of movement.
Conclusion:
The study has shown that all polyethylene tibial components have equivocal outcomes to metal backed components. A cost analysis for our institution, in using the all polyethylene procedure, shows a substantial financial saving can be made with no detrimental effects to the patient. This study recommends their use should be more widely considered, particularly for older patients.
| Original language | English |
|---|---|
| Publication status | Published - 25 Mar 2020 |
| Event | American Academy of Orthopaedic Surgeons annual meeting 2020 - Orange convention centre, , Orlando, Florida, United States Duration: 24 Mar 2020 → 28 Mar 2020 |
Conference
| Conference | American Academy of Orthopaedic Surgeons annual meeting 2020 |
|---|---|
| Abbreviated title | AAOS 2020 |
| Country/Territory | United States |
| City | Orlando, Florida |
| Period | 24/03/20 → 28/03/20 |
Keywords
- Total knee arthroplasty
- All-polyethylene Tibia
- OUTCOMES