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. 2020 Mar 30;54(6):856-862.
doi: 10.1007/s43465-020-00093-8. eCollection 2020 Nov.

3D Printing Navigation Template Used in Total Hip Arthroplasty for Developmental Dysplasia of the Hip

Liang Yan #  1   2 , Peng Wang #  2 , Haibin Zhou  1
Affiliations

3D Printing Navigation Template Used in Total Hip Arthroplasty for Developmental Dysplasia of the Hip

Liang Yan et al. Indian J Orthop. .

Abstract

Background: The purpose of our study was to explore the feasibility of 3D printing navigation template used in total hip arthroplasty (THA) for adult developmental dysplasia of the hip (DDH).

Materials and methods: 25 patients who received THA for DDH from February 2014 to May 2018 were randomized into the control or intervention group. Of these patients, 12 received THAs assisted with 3D printing navigation templates, 13 THAs underwent THAs without navigation templates. The mean follow-up was 1.6 (range, 1.2-3.8) years. Clinical scores and radiographic results were evaluated for two groups.

Results: Operating time, intra- and postoperative hemorrhage and Harris Hip Score (HHS) at 6 months postoperatively in the 3D printing group were better than those for patients in the conventional hip replacement group, while infection and implant loosening were 0 in the two groups. There were no significant differences in anteversion angle, abduction angle and the distance from rotation center to the ischial tuberosity line in 3D printing group as compared to the normal side. The abduction angle and the distance from rotation center to the ischial tuberosity line were significantly different between the two sides in the traditional group.

Conclusion: Application of the 3D printing template for THA with DDH can facilitate the surgical procedure and create an ideal artificial acetabulum placement.

Keywords: 3D printing technology; Developmental dysplasia of the hip; Navigation template; Total hip arthroplasty.

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Conflict of interest statement

Conflict of interestOn behalf of all authors, the corresponding author states that there is no conflict of interest.

Figures

Fig. 1
Fig. 1
Preoperative design and template preparation. a, b DICOM data were imported into Mimics software for 3D reconstruction. The femur was removed. c, d The true acetabulum was identified according to the contralateral side, the cup size and angle were also designed. e The base was designed with reverse modeling which matched with the false acetabulum. f The ring was designed to fall on the same level of the cup and 2 mm larger than the diameter of the cup, the base and the ring were detachable with a card slot. g The concentric rings growing in size could be designed, if the osteophytes were too many to put the final ring. h The reamer was at the center of the ring
Fig. 2
Fig. 2
Simulating operation. a 3D printing guide plate components. b The plate was installed with Kirschner wire. c, d The acetabulum was reamed step by step, the reamer was parallel to and at the center of the ring
Fig. 3
Fig. 3
Operation. a The ring was pointed to the true acetabulum. b The acetabulum was stepwise reamed
Fig. 4
Fig. 4
Preoperative and postoperative X-ray
See this image and copyright information in PMC

References

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