Taux d’usure et ostéolyse avec deux types de polyéthylène recuit hautement réticulé de deuxième génération en arthroplastie totale de la hanche : étude comparative rétrospective au recul minimum de cinq ans - 01/02/23
Wear rate and osteolysis in two types of second-generation annealed highly cross-linked polyethylene in total hip arthroplasty: A retrospective comparative study with a minimum of five years
, Tetsuya Jinno, Kazumasa Miyatake, Naoto Watanabe, Hideyuki Koga, Toshitaka Yoshii, Kazuyoshi Yagishita, Atsushi OkawaAbstract |
Background |
As no previous study has directly compared the linear wear rate in two types of second-generation annealed highly cross-linked polyethylene, we performed a retrospective study with a minimum of 5-year follow-up to assess primary arthroplasties in the: (1) wear rates; and (2) incidence of osteolysis of the two types of HXLPE.
Hypothesis |
There was no significant difference in the linear wear rate and the incidence of osteolysis between the two types of second-generation annealed highly cross-linked polyethylene.
Patients and methods |
In this single-center study, we reviewed 257 cases of primary cementless total hip arthroplasties between 2011 and 2015, which were performed with 32mm delta ceramic on second-generation annealed highly cross-linked polyethylene (X3 and E1 were used in 105 and 103 cases, respectively). The mean wear rate was evaluated using a computer-assisted method, and the incidence of osteolysis was evaluated based on the appearance of a localized area with loss of trabecular bone or cortical erosion adjacent to the implants during the latest follow-up.
Results |
In total, we evaluated 208 cases, followed postoperatively for over 5 years (mean, 6.1 years, range: 5.0–8.0). There were no significant differences between the two groups with respect to age (list in order of group X, group E, p-value) (61.2±12.3, 62.7±12.1, p=0.36), sex (ratio of male: 17.1 %, 14.6 %, p=0.61), body mass index (22.9±3.7, 22.8±4.0, p=0.91), pre- (49.9±14.8, 48.5±13.8, p=0.49) and postoperative (91.3±9.1, 92.7±7.0, p=0.23) Japanese Orthopaedic Association Hip Score, cup size (50.8±3.0, 50.9±2.2, p=0.70), cup inclination (38.7±4.8, 37.6±4.8, p=0.10), and cup anteversion (18.7±6.9, 18.5±7.6, p=0.80). The mean linear wear rates of the X3 and E1 groups were 0.057±0.039 (range: 0–0.16) and 0.054±0.037mm/year (range: 0–0.15), respectively (p=0.61). No osteolysis was found on the final plain radiographs in both groups.
Discussion |
This study revealed that both types of highly cross-linked polyethylene have excellent linear wear rates and were equally safe to use. However, the difference between the two materials in terms of the long-term wear rate should be further validated.
Level of evidence |
III; retrospective case control study.
Le texte complet de cet article est disponible en PDF.Keywords : X3, E1, PolyWare, Tapered-wedge, Cementless, Cross-linked polyethylene, Wear rate
| ☆ | Cet article peut être consulté in extenso dans la version anglaise de la revue Orthopaedics & Traumatology: Surgery & Research sur Science Direct (sciencedirect.com) en utilisant le DOI ci-dessus. |
Vol 109 - N° 1
P. 127 - février 2023 Retour au numéro
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