class="Heading">Background class="Para">Proximal humeral fractures occur frequently. Displaced or unstable fractures require open reduction and internal fixation. Our objective was to investigate the clinical and radiographic results of the internal fixation using Polarus humeral nails for fractures of the proximal humerus. class="Heading">Materials and methods class="Para">From January 2001 to April 2006, 54 shoulders of 54 patients (44 females, 10 males) underwent the intramedullary fixation using Polarus humeral nail. Mean age of the patients was 66-year-old (39–89) at the time of the surgery. Fracture-type by Neer classification was 2-part (29 shoulders), 3-part (22 shoulders) and 4-part (3 shoulders). The clinical and radiological outcomes were evaluated. class="Heading">Results class="Para">All the shoulders after osteosynthesis obtained bone-union. There was no osteonecrosis of the humeral head. Functional outcome measured by JOA score averaged 81 points. Totally 43 patients (79%) had satisfactory to excellent results. Varus deformity was seen in 4 shoulders (8%) and the deformity of the greater tuberosity in 4 (8%). class="Heading">Conclusion class="Para">The Polarus intramedullary humeral nail is effective for the treatment of proximal humeral fractures.
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机译：class =“ Heading”>背景 class =“ Para”>最近的肱骨骨折经常发生。移位或不稳定的骨折需要切开复位和内固定。我们的目的是研究使用Polarus肱骨钉内固定治疗肱骨近端骨折的临床和放射学结果。 class =“ Heading”>材料和方法 class =“ Para从2001年1月至2006年4月，采用Polarus肱骨钉对54例患者的54例肩膀（女性44例，男性10例）进行了髓内固定。手术时患者的平均年龄为66岁（39-89岁）。根据Neer分类，骨折类型为2部分（29肩），3部分（22肩）和4部分（3肩）。评估了临床和放射学结果。 class =“ Heading”>结果 class =“ Para”>骨合成后所有的肩膀都获得了骨联合。肱骨头没有坏死。通过JOA评分测得的功能结局平均为81分。共有43例患者（79％）满意至出色。在4个肩部（8％）可见内翻畸形，在4个肩部可见大结节畸形（8％）。 class =“ Heading”>结论 class =“ Para”> Polarus髓内肱骨钉治疗肱骨近端骨折有效。
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