Effects of 3D-printed porous metal cup with hip dual-mobility revision system for reconstruction of severe acetabular ring defects in revision total hip arthroplasty
10.3760/cma.j.cn121113-20210222-00196
- VernacularTitle:应用3D打印多孔金属髋臼双动头重建系统重建严重髋臼结构性骨缺损的早期疗效
- Author:
Pengfei LEI
1
;
Long HUA
;
Hu QIAN
;
Ting WEN
;
Da ZHONG
;
Jie XIE
;
Xucheng YANG
;
Long WANG
;
Ruyin HU
;
Yihe HU
Author Information
1. 中南大学湘雅医院骨科，长沙 410008
- Keywords:
Printing, three-dimensional;
Hip prosthesis;
Reoperation;
Arthroplasty, replacement, hip
- From:
Chinese Journal of Orthopaedics
2021;41(14):911-919
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To prospectively analyze the early clinical effects of 3D-printed porous metal cup with hip dual-mobility revision (HDR) system in treating severe acetabular bone defects.Methods:A total of 17 patients with severe acetabular defects (15 patients in Allan-Gross type 4 and 2 patients in type 5; 2 patients in Paprosky type 2B, 4 patients in type 3A and 11 patients in type 3B) who underwent revision hip arthroplasty between July 2019 and May 2020 were analyzed. There were 7 males and 10 females (mean age 67.3±9.3 years; range 42-80 years). The average body mass index was 22.2±3.8 kg/m 2 (range 17.7-33.3 kg/m 2). The preoperative mean leg length discrepancy (LLD) was 42.9±31.1 mm (range 10-160 mm) . One patient presented positive Trendelenburg sign. The follow-up duration was 12.1±3.0 months (range 6-16 months). The clinical and radiographic hip scores in all patients were evaluated. Results:The mean Harris Hip Score (HHS) was 31.2±11.3 points at preoperatively, 63.5±10.0, 68.7±10.4 and 70.2±10.1 points at 3 days, 7 days and 1 month postoperatively. At the latest follow-up, HHS was increased to 81.6±7.0 points. The outer cup mean abduction angle was 48.1°±10.6° and the mean inclination angle was 10.8°±6.0° postoperatively. The inner cup mean abduction angle was 45.0°±6.2° and the mean inclination angle was 10.8°±3.7°. The mean LLD decreased to 11.1±3.8 mm (range: 0-15 mm) after surgery. At the latest follow-up, all acetabular components were radiologically stable without displacement. No osteolysis or absorption was observed. There was no infection, loosening or nerve injury in all cases.Conclusion:During short-term follow-up, the 3D-printed porous metal HDR system can effectively enhance the stability of implants with satisfied quality of life. It can provide a good result for the revision of total hip arthroplasty with severe acetabular defects.
