Jun Yong Cheol, Moon Young Lae, Elsayed Moustafa I, Lim Jae Hwan, Cha Dong Hyuk
Department of Orthopedic Surgery, Chosun University Hospital, Gwangju, Korea.
Department of Orthopedic Surgery, Sohag University Hospital, Sohag Governorate, Egypt.
Clin Shoulder Elb. 2018 Sep 1;21(3):134-137. doi: 10.5397/cise.2018.21.3.134. eCollection 2018 Sep.
In a previous study undertaken to quantify capsular volume in rotator cuff interval or axillary pouch, significant differences were found between controls and patients with instability. However, the results obtained were derived from two-dimensional cross sectional areas. In our study, we sought correlation between three-dimensional (3D) capsular volumes, as measured by magnetic resonance arthrography (MRA), and multidirectional instability (MDI) of the shoulder.
The MRAs of 21 patients with MDI of the shoulder and 16 control cases with no instability were retrospectively reviewed. Capsular areas determined by MRA were translated into 3D volumes using 3D software Mimics ver. 16 (Materilise, Leuven, Belgium), and glenoid surface area was measured in axial and coronal MRA views. Then, the ratio between capsular volume and glenoid surface area was calculated, and evaluated with control group.
The ratio between 3D capsular volume and glenoid surface area was significantly increased in the MDI group (3.59 ± 0.83 cm/cm) compared to the control group (2.53 ± 0.62 cm/cm) (<0.01).
From these results, we could support that capsular volume enlargement play an important role in MDI of the shoulder using volume measurement.
在之前一项旨在量化肩袖间隙或腋窝囊容积的研究中，发现对照组与不稳定患者之间存在显著差异。然而，所获得的结果源自二维横截面积。在我们的研究中，我们探寻通过磁共振关节造影（MRA）测量的三维（3D）囊容积与肩部多向不稳定（MDI）之间的相关性。
回顾性分析21例肩部MDI患者和16例无不稳定的对照病例的MRA。使用3D软件Mimics ver. 16（比利时鲁汶Materialise公司）将MRA确定的囊面积转换为3D容积，并在轴向和冠状面MRA视图中测量关节盂表面积。然后，计算囊容积与关节盂表面积的比值，并与对照组进行评估。
与对照组（2.53±0.62 cm/cm）相比，MDI组（3.59±0.83 cm/cm）的3D囊容积与关节盂表面积的比值显著增加（<0.01）。
从这些结果来看，我们可以支持通过容积测量得出的囊容积增大在肩部MDI中起重要作用这一观点。
