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Endosteal strut using a hydroxyapatite/poly-l-lactide mesh tube with a proximal humeral locking plate for the treatment of proximal humeral fractures

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European Journal of Orthopaedic Surgery & Traumatology Aims and scope Submit manuscript

Abstract

Purpose

Proximal humeral fractures cause large intramedullary bone defects after humeral-head reduction. Hydroxyapatite/poly-l-lactide (HA/PLLA) materials are widely used for various fractures. However, the efficacy of endosteal strut using a HA/PLLA mesh tube (ES-HA/PLLA) with a locking plate for treating proximal humeral fractures was not reported. The purpose of this study is to examine the efficacy of ES-HA/PLLA with a proximal humeral locking plate in proximal humeral fractures.

Methods

Seventeen patients with proximal humeral fractures treated using ES-HA/PLLA with a locking plate from November 2017 to November 2021 were evaluated. The range of motion of the shoulder and postoperative complications were assessed at the final follow-up. Radiographs were evaluated to assess bone union and loss of reduction by measuring humeral-head height (HHH) and humeral neck-shaft angle (NSA).

Results

The average flexion and external rotation of the shoulder at the final follow-up were 137° (range, 90–180°) and 39° (range, − 10 to 60°), respectively. All fractures were united. The average HHH and NSA just after the surgery and final follow-up were 12.5 mm and 11.6 mm and 129.9° and 127.4°, respectively. Two patients presented screw perforation of the humeral head. One patient underwent implant removal due to infection. Avascular necrosis of the humeral head was observed in one patient with arthritis mutilans.

Conclusions

The use of ES-HA/PLLA with a proximal humeral locking plate resulted in bone union in all patients and prevented postoperative loss of reduction. ES-HA/PLLA is one of the treatment options for proximal humeral fractures.

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Funding

The present study was supported in part by a Grant-in-Aid for Scientific Research (19K18471) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

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HI, NT, and GK drafted the manuscript. NT, NY, TU, IS, and HM critically reviewed the manuscript. All authors have read and approved the final submitted manuscript.

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Correspondence to Gen Kuroyanagi.

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Informed consent was obtained from all patients for participation in the study.

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Iwata, H., Takada, N., Kuroyanagi, G. et al. Endosteal strut using a hydroxyapatite/poly-l-lactide mesh tube with a proximal humeral locking plate for the treatment of proximal humeral fractures. Eur J Orthop Surg Traumatol 34, 217–223 (2024). https://doi.org/10.1007/s00590-023-03638-3

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  • DOI: https://doi.org/10.1007/s00590-023-03638-3

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