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International Journal of Bioprinting 3DP Ta buttress in DDH shelf acetabuloplasty

porous tantalum offers better human fetal osteoblast (hFOB) for inadequate coverage laterally and anteriorly, thus
cell adhesion, growth, death, and differentiation compared restoring the concentricity of the hip joint and providing
with porous titanium, enhancing early bioactivity, and can sustained mechanical support. Postoperatively, patients
be widely used in metal implants. Fan et al. confirmed experience pain relief and restoration of hip joint function,
31
that 3D-printed porous tantalum exhibited superior with satisfactory clinical efficacies in early follow-ups and
biomechanical and microstructural properties compared no occurrence of serious complications. This method
with porous titanium, with more evident osseointegration holds promising clinical application prospects in shelf
4–6 weeks postoperatively. Tantalum’s compressive acetabuloplasty for treating DDH.
strength is closer to that of pig bone scaffolds, making
it easier to integrate with host bone and prevent stress Acknowledgments
shielding and implant loosening. Macheras et al. used None.
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porous tantalum for acetabular components in primary
total hip arthroplasty, with an average follow-up of 18.1 Funding
years (range: 17.5–19 years) for 140 patients. The survival
rate, with any reoperation for any reason as the endpoint, This study was supported by the General Program of
was 92.8%, and the survival rate with aseptic loosening as the National Natural Science Foundation of China
the endpoint was 100%. This study innovatively employed (No. 82372365).
3D-printed individualized porous tantalum buttress
in shelf acetabuloplasty for patients with DDH. Both Conflict of interest
subjective functional scores and objective radiological The authors declare they have no competing interests.
indicators demonstrated significant improvements at
the final follow-up compared with preoperative ones (p Author contributions
< 0.01), with an overall patient satisfaction rate reaching
84%. No complications, such as graft rejection, infection, Conceptualization: Guangxing Chen, Liu Yang
or loosening, were observed among all patients. However, Formal analysis: Juncai Xu, Xin Chen
correlation analysis between the deviation in porous Investigation: Yang Peng, Ran Xiong, Chengjun Huang,
tantalum buttress placement and iHOT-12 score, as well Guangxing Chen, Liu Yang
as patient satisfaction, revealed moderate negative results Writing – original draft: Yang Peng, Xin Chen
when placed in pronation or backward. This may be due to Writing – review & editing: Guangxing Chen, Liu Yang
pronation leading to flexion impingement, while backward
placement results in insufficient coverage of the anterior Ethics approval and consent to participate
acetabulum. Therefore, the implantation position of the This study was approved by the Ethics Committee of the
porous tantalum buttress must be individually designed Southwest Hospital (No. KY201908).
preoperatively and accurately placed intraoperatively to
ensure the recovery of hip joint function and mobility. Consent for publication
This study also has limitations: (i) a control group was All patients signed the informed consent form.
not established, lacking a large-scale control study on the
clinical efficacy of the 3D-printed individualized porous Availability of data
tantalum buttress; (ii) some cases had a follow-up period The raw data used to reproduce these findings are available
of only 1 year, which was insufficient for any implant from the corresponding author upon reasonable request.
loosening or displacement to occur. Further validation
of our findings requires additional cases and long-term References
follow-up studies.
1. Vaquero-Picado A, González-Morán G, Garay EG,
5. Conclusion Moraleda L. Developmental dysplasia of the hip: update of
management. EFORT Open Rev. 2019;4(9):548-556.
The application of 3D-printed individualized porous doi: 10.1302/2058-5241.4.180019
tantalum buttress in shelf acetabuloplasty for patients with 2. Tønning LU, O’Brien M, Semciw A, Stewart C, Kemp
DDH offers advantages such as minimal surgical trauma, JL, Mechlenburg I. Periacetabular osteotomy to treat hip
simple operation, and no donor site complications. More dysplasia: a systematic review of harms and benefits. Arch
importantly, the buttress achieves a good fit with the Orthop Trauma Surg. 2023;143(6):3637-3648.
acetabulum and femoral head, effectively compensating doi: 10.1007/s00402-022-04627-7

Volume 10 Issue 6 (2024) 221 doi: 10.36922/ijb.4074