Department of Orthopaedics, Augusta University Medical Center, Augusta, Georgia, U.S.A.
Department of Orthopaedics, Augusta University Medical Center, Augusta, Georgia, U.S.A..
Arthroscopy. 2020 Jun;36(6):1517-1522. doi: 10.1016/j.arthro.2020.01.049. Epub 2020 Feb 11.
The purpose of this study was to determine if there are significant side-to-side anthropometric differences between paired glenoids.
Forty-six matched-pair cadaver glenoids were harvested, and their glenoid heights (GHs) and glenoid widths (GWs) were measured with digital calipers. The glenoid surface area was calculated using the standard assumption that the inferior two-thirds of the glenoid is a perfect circle.
There was a statistically significant difference between matched-pair GHs of 0.96 ± 3.07 mm (P = .020) and GWs of 0.46 ± 1.64 mm (P = .033). There was a significant difference of glenoid cavity area of 20.30 ± 81.53 mm2 (P = .044), or a difference of ∼3%. A total of 4 of 46 pairs of glenoids (8.6%) showed a difference in width >3 mm.
This study demonstrates the fallacy of use of the contralateral glenoid in measuring glenoid bone loss. Although many paired samples exhibited similar side-to-side glenoid measurements, the number of cadaveric pairs that showed differences of >3 mm was substantial. Caution should be taken when using calculation methods that include this assumption for surgical decision making, as surface area, GW, and GH were all shown to have statistically significant side-to-side differences in their measurements.
Many methods exist for measuring glenoid bone loss after anterior shoulder dislocation, but some of the current methods may be inaccurate and lead to unreliable estimations.
本研究旨在确定成对肩盂之间是否存在显著的侧方人体测量学差异。
采集了 46 对配对尸体肩盂，并使用数字卡尺测量其肩盂高度（GH）和肩盂宽度（GW）。通过标准假设，即下三分之二的肩盂为完美的圆形，计算肩盂表面积。
匹配对 GH 之间存在统计学上的显著差异，为 0.96 ± 3.07 mm（P =.020），GW 之间存在统计学上的显著差异，为 0.46 ± 1.64 mm（P =.033）。肩盂腔面积存在显著差异，为 20.30 ± 81.53 mm2（P =.044），或差异约为 3%。总共 46 对肩盂中有 4 对（8.6%）的宽度差异大于 3 mm。
本研究表明，在测量肩盂骨丢失时使用对侧肩盂存在错误。尽管许多配对样本显示出相似的侧方肩盂测量值，但显示出差异大于 3mm 的尸体对数量相当可观。在进行手术决策时，应谨慎使用包括此假设的计算方法，因为表面积、GW 和 GH 的测量均显示出具有统计学意义的侧方差异。
在肩盂前脱位后存在多种测量肩盂骨丢失的方法，但目前的一些方法可能不准确，导致估计不可靠。
