Retrospective Study
Copyright ©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Aug 6, 2021; 9(22): 6300-6307
Published online Aug 6, 2021. doi: 10.12998/wjcc.v9.i22.6300
Jumbo cup in hip joint renovation may cause the center of rotation to increase
Ya-Wen Peng, Jun-Min Shen, Yan-Chao Zhang, Jing-Yang Sun, Yin-Qiao Du, Yong-Gang Zhou
Ya-Wen Peng, Jun-Min Shen, Yan-Chao Zhang, Jing-Yang Sun, Yin-Qiao Du, Yong-Gang Zhou, Department of Orthopedics, The First Medical Centre, Chinese People’s Liberation Army General Hospital, Beijing 100853, China
Author contributions: Peng YW and Shen JM design the experiment; Zhang YC drafted the work, Sun JY, Du YQ and Zhou YG collected the data; Peng YW and Shen JM analyzed and interpreted data, Peng YW, Shen JM and Zhang YC wrote the article.
Institutional review board statement: The study was reviewed and approved by the Chinese People’s Liberation Army General Hospital Institutional Review Board.
Informed consent statement: All study participants, or their legal guardian, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: The authors declare that there is no conflict of interest.
Data sharing statement: No additional data are available.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Yong-Gang Zhou, MD, PhD, Doctor, Department of Orthopedics, The First Medical Centre, Chinese People’s Liberation Army General Hospital, No. 28 Fuxing Road, Haidian District, Beijing 100853, China. ygzhou301@163.com
Received: May 15, 2021
Peer-review started: May 15, 2021
First decision: May 23, 2021
Revised: May 24, 2021
Accepted: May 27, 2021
Article in press: May 27, 2021
Published online: August 6, 2021
Processing time: 74 Days and 1.5 Hours
Abstract
BACKGROUND

Utilizing the large jumbo cup in revision total hip arthroplasty is an effective approach to cure many lacunar and segmental peripheral bone defects. However, with the use of the jumbo cup, the center of the hip joint may become elevated relative to the primary acetabulum, and the diameter of the large cup is greater.

AIM

To study the height and the significance of the elevation of the hip joint center.

METHODS

Eighty-eight patients matched the criteria for this condition and were included in the study. The center height of the hip joint was measured relative to the opposite normal hip joint. The diameter of the jumbo cup was measured and checked according to operation notes, and the diameter of the jumbo cup was measured with a prosthesis label. Then, the horizontal and vertical centers of rotation were measured on the surgical side and opposite side. The average center height of the hip joint on the renovated side and the opposite side and the position of the hip cup relative to the teardrop were compared using a paired t-test.

RESULTS

Radiometric analysis showed that the average hip joint center was elevated by 7.6 mm. The rotational center height delta of the renovated hip was 7.6 ± 5.6 mm, and there was an obvious difference between the two groups (P = 0.00). The difference in horizontal distance was 0.5 ± 5.1 mm (-11.5 -14.0 mm), and there was no obvious difference between the two groups (P = 0.38). According to the foreign standard, the rotational center height delta of the renovated hip was 7.5 ± 6.2 mm, and there was a significant difference between the two groups (P = 0.00). There was no obvious difference between the domestic and foreign standards (P > 0.05) between the two groups.

CONCLUSION

The application of the jumbo cup elevates the rotational center of the hip joint, but it is feasible and effective to use the jumbo cup.

Keywords: Hip revision surgery; Jumbo cup; Center of rotation; Hip joint renovation; Hip joint

Core Tip: In this study, we discuss the application of the jumbo cup via observing how high the elevation of the center of the hip joint is and its significance in imaging X-rays, and came to the conclusion: The application of the jumbo cup elevates the rotational center of the hip joint, but it is feasible and effective to use the jumbo cup.