Stability of 3D-printed titanium trabecular metal socket cups during total hip arthroplasty

doi:10.12307/2022.741

Abstract

Abstract: BACKGROUND: The number of total hip arthroplasty is increasing year by year. There are many surface treatment methods of biological prosthesis. The survival rate and clinical effect of prosthesis have become the common concern of doctors and patients.
OBJECTIVE: To compare and analyze the short-term follow-up results of 3D-accurate constructive technology socket cups and Pinnacle socket cups after total hip arthroplasty to investigate the stability of 3D-printed titanium alloy bone trabecular socket cup prostheses.
METHODS: Medical records of 96 patients (98 hips) who underwent total hip arthroplasty from January 2016 to December 2019 in the Department of Joint Surgery, People’s Hospital of Ningxia Hui Autonomous Region were retrospectively analyzed. According to the choice of prosthesis, they were divided into two groups. Among them, 69 hips in the observation group used the 3D-printed titanium alloy bone trabecular socket cup (accurate constructive technology cup), and 29 hips in the control group used the Pinnacle cup. Short-term postoperative follow-up was performed by visual analogue scale pain score, forgotten joint score, Harris hip function score, and imaging assessment for clinical efficacy analysis.
RESULTS AND CONCLUSION: (1) There were significant differences in the visual analogue scale score and hip Harris score between the two groups at 1 week after operation (P < 0.05). There was no significant difference in the visual analogue scale score and hip Harris score between the two groups at 1, 6, and 12 months after operation (P > 0.05). There was no significant difference in the forgotten joint score between the two groups at 6 and 12 months after operation (P > 0.05). (2) At 12 months after operation, the visual analogue scale score and hip Harris score in both groups were significantly improved compared with those before operation (P < 0.05). (3) During the postoperative follow-up of the two groups, no radiolucent lines were found around the acetabular cup in the X-ray films of the hip joint. All the cups were in satisfactory position, and no obvious signs of displacement were found. All of them achieved stable fixation, and the bone ingrowth between the cup and the bone interface was good. (4) In conclusion, the 3D-printed titanium trabecular metal socket cups had better short-time initial stability, good bone ingrowth between the prosthesis and bone interface, and satisfactory short-term clinical results; long-term results require further follow-up.

Key words: 3D printing, metal mortar cup, total hip arthroplasty, fixation, follow-up

CLC Number:

Ma Ning, Wang Cong, Liu Ningqiang, Xie Tong, Yang Chaojian, Guo Chongjun, Niu Dongsheng, Liang Yuqi. Stability of 3D-printed titanium trabecular metal socket cups during total hip arthroplasty[J]. Chinese Journal of Tissue Engineering Research, 2022, 26(33): 5278-5282.

Figures/Tables 6

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