Efficacy of a Pelvic Lateral Positioner With a Mechanical Cup Navigator Based on the Anatomical Pelvic Plane in Total Hip Arthroplasty
Efficacy of a Pelvic Lateral Positioner With a Mechanical Cup Navigator Based on the Anatomical Pelvic Plane in Total Hip Arthroplasty
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DOI：
10.1016/j.arth.2017.06.033
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发表时间：
2017-12-01
影响因子：
3.5
通讯作者：
Nakamura, Hiroaki
中科院分区：
文献类型：
--
作者：
Iwakiri, Kentaro;Kobayashi, Akio;Nakamura, Hiroaki
背景：全髋关节置换术中髋臼假体的定位对取得良好的临床效果至关重要。然而，据报道，传统的广泛使用的用于放置杯子的对准导向器相对不可靠。本研究旨在比较一种新型的骨盆定位导向器，它可以安装在我们的骨盆解剖平面(APP)骨盆侧向定位器上，以减少骨盆矢状面倾斜度的差异，并基于APP指示靶向杯角度，与传统的定位导向器进行比较。手术采用传统杯形导向器(常规组，60个髋关节)和新型杯形导航仪(机械导航仪组，76个髋关节)。结果：常规导航组的平均杯角为39.0°±5.3°，前倾角为21.7°±6.4°，机械导航组的平均杯角为40.6°±3.2°和18.3°±4.6°(P=0.018，P
Background: The acetabular component orientation in total hip arthroplasty (THA) is of critical importance to the good clinical results. However, traditional widely used cup alignment guides for cup placement are reported to be relatively unreliable. The present study aims at comparing a novel cup alignment guide, which can be attached to our anatomical pelvic plane (APP) pelvic lateral positioner for reducing discrepancies in sagittal pelvic tilt and indicate a targeted cup angle based on the APP, with a conventional cup alignment guide.Methods: The subjects were 136 hips of 136 patients who underwent unilateral THA using the APP positioner. The procedure was performed with the conventional cup alignment guide (conventional group; 60 hips) and with the novel cup navigator (mechanical navigator group; 76 hips). Postoperative cup angles and discrepancies of postoperative cup angles (inclination and anteversion angles) from the targeted angles were compared between the 2 groups to evaluate the usefulness of these navigators.Results: The mean cup angles in the conventional group were 39.0 degrees +/- 5.3 degrees for the inclination angle and 21.7 degrees +/- 6.4 degrees for the anteversion angle, whereas those in the mechanical navigator group were 40.6 degrees +/- 3.2 degrees and 18.3 degrees +/- 4.6 degrees, respectively (P = .018, P