Comparison of wear rate and osteolysis between second-generation annealed and first-generation remelted highly cross-linked polyethylene in total hip arthroplasty. A case control study at a minimum of five years - 29/11/17
, D. Koga, K. Miyatake, T. Muneta, A. Okawa
Benvenuto su EM|consulte, il riferimento dei professionisti della salute.
Articolo gratuito.
Si connetta per beneficiarne
Abstract |
Background |
There is no previous report that directly compared wear resistance of second-generation annealed highly cross-linked polyethylene with that of first-generation remelted highly cross-linked polyethylene. We therefore performed a retrospective study at a minimum of 5-year follow-up comparing second-generation annealed and first-generation remelted highly cross-linked polyethylene in order to: (1) assess wear rates and (2) compare the incidence of osteolysis between, (3) identify the frequency of complication related to the two types of highly cross-linked polyethylene.
Hypothesis |
There is a difference in the linear wear rate and the incidence of osteolysis between the two types of highly cross-linked polyethylene in total hip arthroplasty.
Materials and methods |
In a single centre study, we reviewed 123 primary cementless total hip arthroplasties between 2010 and 2011 that were performed with 32mm alumina ceramic on second-generation annealed (X3) or first-generation remelted (Longevity) highly cross-linked polyethylene liner. There was no specific reason for the choice of the type of highly cross-linked polyethylene. There were no significant differences between the two groups in respect of gender, diagnosis, body mass index, pre- and post-operative functional and activity score, cup size, and cup orientation except the younger age in the X3 group. The mean wear rate and the incidence of osteolysis were evaluated at the latest follow-up.
Results |
One hundred nine cases followed over 5 years post-operatively (88.6% in all consecutive cases) were evaluated. X3 and Longevity were used in 54 and 55 cases, respectively. The mean follow-up was 5.3 years in both groups. The mean linear wear rate of X3 and Longevity group was 0.045±0.023mm/year and 0.076±0.031mm/year, respectively (P<0.001). No osteolysis was found on plain X-rays in both groups and no specific complication was related to these highly cross-linked components.
Discussion |
Excellent wear resistance of both types of highly cross-linked polyethylene liner was revealed in our study. The difference of wear rate between two materials should be monitored in a longer follow-up.
Level of evidence |
Level III retrospective case control study.
Il testo completo di questo articolo è disponibile in PDF.Keywords : X3, Longevity, PolyWare, Tapered-wedge, Cementless, Cross-linked polyethylene, Wear
Mappa
Vol 103 - N° 4
P. 537-541 - giugno 2017 Ritorno al numero
Articolo precedente
- Accuracy and reproducibility of preoperative three-dimensional planning for total hip arthroplasty using biplanar low-dose radiographs : A pilot study
- D. Mainard, O. Barbier, Y. Knafo, R. Belleville, L. Mainard-Simard, J.-B. Gross
- Acetabular bone defects in THA revision: Reconstruction using morsellised virus-inactivated bone allograft and reinforcement ring. Seven-year outcomes in 95 patients
- G. Villatte, R. Erivan, G. Salles, B. Pereira, M. Galvin, S. Descamps, S. Boisgard
Benvenuto su EM|consulte, il riferimento dei professionisti della salute.