Purpose: The aim of our study is to evaluate long-term outcomes from a cohort of patients treated with Collum Femoris Preserving (CFP) stem correlating neck resorption with comorbidities, clinical outcomes and complications. Methods: 176 patients (194 hips) were retrospectively reviewed with a minimum follow-up (f.u.) of 10 years. Demographic and surgical data were collected. Clinical and radiological evaluation was performed at the last f.u. We calculate a Neck Resorption Ratio (NRR). Main complications were recorded. A p-value of <0.05 was considered significant. Results: Mean HHS was 89.1 ± 5.7; VAS was 1,1 ± 1 and OHS was 41.3 ± 5.1. 7 patients complained thigh pain. Mean LLD was 1.5 mm ± 1.9. Mean NRR was 0.35. We observed 6 cases of Aseptic Loosening (AL), 2 cases of PJI, 1 implant revision for recurrent dislocation and 1 stem revision after PPFF. The overall survival rate of the stem was 94.8 %. Associations between NRR and steroid therapy/stem malposition were significant (p<0,05). Correlation between AL and NRR was significant for p< 0.05. Correlations between NRR and HHS/OHS were - 0.34 and -0.28 respectively. Odds Ratio for AL were: 4.6 if NRR > 0.25; 16.9 if > 0.50 and 24.1 if > 0.75. Conclusion: CFP hip stem provide excellent long-term outcomes. NRR is correlated to steroid therapy and stem malposition. The risk of stem AL rises according to NRR increase. Patients with a NRR> 0,5, especially if under steroid therapy or with stem malposition, should be strictly followed for AL.
The fate of the neck after Collum Femurs Preserving (CFP) prosthesis: a 19-years single center experience.
ZANIRATO, ANDREA;FORMICA, MATTEO;
2016-01-01
Abstract
Purpose: The aim of our study is to evaluate long-term outcomes from a cohort of patients treated with Collum Femoris Preserving (CFP) stem correlating neck resorption with comorbidities, clinical outcomes and complications. Methods: 176 patients (194 hips) were retrospectively reviewed with a minimum follow-up (f.u.) of 10 years. Demographic and surgical data were collected. Clinical and radiological evaluation was performed at the last f.u. We calculate a Neck Resorption Ratio (NRR). Main complications were recorded. A p-value of <0.05 was considered significant. Results: Mean HHS was 89.1 ± 5.7; VAS was 1,1 ± 1 and OHS was 41.3 ± 5.1. 7 patients complained thigh pain. Mean LLD was 1.5 mm ± 1.9. Mean NRR was 0.35. We observed 6 cases of Aseptic Loosening (AL), 2 cases of PJI, 1 implant revision for recurrent dislocation and 1 stem revision after PPFF. The overall survival rate of the stem was 94.8 %. Associations between NRR and steroid therapy/stem malposition were significant (p<0,05). Correlation between AL and NRR was significant for p< 0.05. Correlations between NRR and HHS/OHS were - 0.34 and -0.28 respectively. Odds Ratio for AL were: 4.6 if NRR > 0.25; 16.9 if > 0.50 and 24.1 if > 0.75. Conclusion: CFP hip stem provide excellent long-term outcomes. NRR is correlated to steroid therapy and stem malposition. The risk of stem AL rises according to NRR increase. Patients with a NRR> 0,5, especially if under steroid therapy or with stem malposition, should be strictly followed for AL.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
