Abstract
Background: Radiostereometric analyses (RSA) are recommended in the phased introduction of new orthopedic implants to assess the risk of late revision due to aseptic loosening.
Aim: Two-year migration measured with MBRSA.
Materials and Methods: Patients (n=66, F/M= 44/22, mean age 62 years (range: 50-71)) scheduled for a TKA due to OA at Gentofte Hospital between September 2018 to October 2019 were included and randomized (1:1) to receive either: A: Persona® (Zimmer Biomet, Warsaw) trabecular metal (TM) TKA or B: Persona® Fully cemented TKA. Patients with an age70 years, diseases influencing the bone metabolism and those who couldn’t comprehend were excluded. Tree patients (did not get the allocated treatment n=2, withdrawal of contest n=1), dropped out early, leaving 63 patients for follow-up, 2 patients were excluded at 1-year follow-up (revision n=2, due to infection and instability). A total of 7 revision were performed (change of insert n=3, revision TKA n= 2, brisement n=1, debridement n=1). RSA at 1 week (used as a baseline), 3, 6, 12, and 24 months postoperative, and at 12 months double examinations were performed. MBRSA was used to evaluate migration and segmental motion, the primary endpoint was maximal total point motion (MTPM) after 24 months and a comparison between groups was performed using a non-parametric test for unpaired data (Mann-Whitney U test).
Results: The mean (range) MTPM of the cemented tibial component at 3, 6, 12 and 24 months were 0.70mm (0.20-2.23), 0.66mm (0.16- 2.28), 0.72mm (0.11-1.65) and 0.72mm (0.11-2.03) and for the TM 0.76mm (0.19- 2.23), 0.80mm (0.36-2.07), 0.79mm (0.22- 1.89) and 0.78mm (0.18-1.92). No difference in mean MTPM between the two tibial groups after 24 months (p= 0.21) Corresponding values for cemented femoral component were 0.41mm (0.14-0.91), 0.47mm (0.14-1.18), 0.49mm (0.12-1.05) and 0.51mm (0.21-1.03) and TM 0.65mm (0.13-1.89), 0.76mm (0.20-2.67), 0.79mm (0.11-2.75) and 0.83mm (0.25-2.19). Significant difference in mean MTPM between the two femoral groups after 24 months (p= 0.019) were found.
Interpretation / Conclusion: All implants stabilize after 3 months. A statistically significant difference after 2- years between the two fixation modes for the femoral component was found
Aim: Two-year migration measured with MBRSA.
Materials and Methods: Patients (n=66, F/M= 44/22, mean age 62 years (range: 50-71)) scheduled for a TKA due to OA at Gentofte Hospital between September 2018 to October 2019 were included and randomized (1:1) to receive either: A: Persona® (Zimmer Biomet, Warsaw) trabecular metal (TM) TKA or B: Persona® Fully cemented TKA. Patients with an age70 years, diseases influencing the bone metabolism and those who couldn’t comprehend were excluded. Tree patients (did not get the allocated treatment n=2, withdrawal of contest n=1), dropped out early, leaving 63 patients for follow-up, 2 patients were excluded at 1-year follow-up (revision n=2, due to infection and instability). A total of 7 revision were performed (change of insert n=3, revision TKA n= 2, brisement n=1, debridement n=1). RSA at 1 week (used as a baseline), 3, 6, 12, and 24 months postoperative, and at 12 months double examinations were performed. MBRSA was used to evaluate migration and segmental motion, the primary endpoint was maximal total point motion (MTPM) after 24 months and a comparison between groups was performed using a non-parametric test for unpaired data (Mann-Whitney U test).
Results: The mean (range) MTPM of the cemented tibial component at 3, 6, 12 and 24 months were 0.70mm (0.20-2.23), 0.66mm (0.16- 2.28), 0.72mm (0.11-1.65) and 0.72mm (0.11-2.03) and for the TM 0.76mm (0.19- 2.23), 0.80mm (0.36-2.07), 0.79mm (0.22- 1.89) and 0.78mm (0.18-1.92). No difference in mean MTPM between the two tibial groups after 24 months (p= 0.21) Corresponding values for cemented femoral component were 0.41mm (0.14-0.91), 0.47mm (0.14-1.18), 0.49mm (0.12-1.05) and 0.51mm (0.21-1.03) and TM 0.65mm (0.13-1.89), 0.76mm (0.20-2.67), 0.79mm (0.11-2.75) and 0.83mm (0.25-2.19). Significant difference in mean MTPM between the two femoral groups after 24 months (p= 0.019) were found.
Interpretation / Conclusion: All implants stabilize after 3 months. A statistically significant difference after 2- years between the two fixation modes for the femoral component was found
| Original language | English |
|---|---|
| Publication date | Nov 2022 |
| Publication status | Published - Nov 2022 |
| Event | Dansk Ortopædisk Selskab kongres 2022 - Vingsted Hotel & Conference center, Bredsten, Denmark Duration: 16 Nov 2022 → 18 Nov 2022 https://www.ortopaedi.dk/dos-kongressen-2022/ |
Conference
| Conference | Dansk Ortopædisk Selskab kongres 2022 |
|---|---|
| Location | Vingsted Hotel & Conference center |
| Country/Territory | Denmark |
| City | Bredsten |
| Period | 16/11/2022 → 18/11/2022 |
| Internet address |