Abstract
Background
AO clavicular hook plates have been widely used for treating acromioclavicular (AC) joint dislocation and distal clavicle fractures. Many complications have been reported, and many patients have complained about the discomfort of the plate. However, no study on the impact of clavicular hook plates in AC joint 3D printing models has been reported.
Objective
To evaluate the matching performance of hook plates with different hook depths when they were implanted in 3D printing models of normal Chinese AC joints and to propose a further design to achieve a better match.
Methods
AO clavicular hook plates with two different hook depths of 15 mm and 18 mm were implanted in 3D printing models of forty Chinese normal AC joints. The angle between the distal clavicle and plate (CPA) and the drop between acromion and distal clavicle (ACD) of normal AC joints with and without plates were measured.
Results
Mismatch was found when the hook plates were implanted, with an average CPA of 18.8 ± 5.1° with the 15-mm hook plate and 10.2 ± 4.9° with the 18-mm hook plate. To eliminate the CPA, the ACD decreased by 6.3 ± 1.1 mm with the 15-mm hook plate and 2.9 ± 0.9 mm with the 18-mm hook plate.
Conclusions
The results revealed that AO clavicular hook plates with different hook depths were very likely to result in over-reduction of the AC joint. It is necessary to bend the hook angle to fit the patient’s AC joint to achieve accurate reduction.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.
Abbreviations
- AC:
-
Acromioclavicular
- CPA:
-
Angle between clavicle and plate
- ORIF:
-
Open reduction and internal fixation
- ACD:
-
Drop between the distal clavicle and acromion
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Acknowledgements
We would like to thank the Central Laboratory of the First Affiliated Hospital of Soochow University for the technical guidance.
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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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XW conceived the study, and XW and GW participated in its design and coordination. QX and KR performed the operations. XW, XY, and GW analyzed the data and drafted the manuscript. All authors interpreted the data and participated in drafting the text and tables. All authors read and approved the final manuscript.
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Wu, X., Wang, G., Xia, Q. et al. Digital Technology Combined with 3D Printing to Evaluate the Matching Performance of AO Clavicular Hook Plates. JOIO 54, 141–147 (2020). https://doi.org/10.1007/s43465-019-00034-0
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DOI: https://doi.org/10.1007/s43465-019-00034-0