Mid-term efficacy of standardized 3D printed porous trabecular titanium acetabular cup in total hip arthroplasty

Abstract

Objective To evaluate the mid-term clinical efficacy of total hip replacement using a standardized 3D printed porous trabecular titanium acetabular cup. Methods Clinical data of 23 consecutive patients undergoing total hip replacement with a standardized 3D printed porous trabecular titanium acetabular cup (25 arthroplasties) between February 2016 and August 2018 were collected and retrospectively analyzed in this study. All patients were followed up for 39~69 (51.7±10.7) months. Efficacy evaluation indicators included incidence of postoperative complications and survival rate of prosthesis, as well as visual analog scale (VAS) score, Harris score, acetabular side imaging evaluation and cup survival rate at 6 months after operation and last follow-up. Results No complications were observed in all 25 hip replacements, and the survival rate of cup was 100% during the whole follow-up. The VAS scores were decreased significantly at 6 months postoperatively (1.44±0.82) and last follow-up (0.08±0.27) when compared with the scores preoperatively (7.48±0.96, P < 0.05). The Harris scores were increased significantly at 6 months postoperatively (86.88±3.52) and last follow-up (95.04±1.86) than the pre-operative scores (45.64±4.55, P < 0.05). There were no significant differences in postoperative VAS score and Harris score between the patients with and without periprosthetic radiolucent zone. Conclusion Standardized 3D printed porous trabecular titanium acetabular cup shows its favorable mid-term outcome in total hip arthroplasty, provides high acetabular survival rate, and has certain advantages in reducing aseptic loosening of the prosthesis.

Keywords

• 3d printed
• porus trabecular titanium
• acetabular cup
• total hip arthroplasty
• midterm efficacy