Z angle

Z angle

定义

Stephan Mahler

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Z角是一种用于评估胫骨解剖学特征的测量方法,适用于易感犬或存在前十字韧带断裂风险的犬只。该测量基于胫骨的内外侧位X线片,X线束以膝关节为中心,并保持盆肢正常站立时的关节角度。当股骨内侧髁外侧髁完全重叠时,该内外侧位投照视图被认为符合要求。

Z角胫骨力学轴与一条连线之间的夹角,该连线连接胫骨粗隆最颅侧点与内侧髁间结节外侧髁间结节中点。

以下为已发表的健康犬Z角参考值:

  • 德国牧羊犬与巴吉度猎犬群体:63.00°(53.00–72.50)Guénégo et al 2017

  • 小型犬:70.02 +/- 5.6°(Aertsens et al. 2015)

  • 大型犬:64.0 +/- 4.7°(Aertsens et al. 2015)

  • 拉布拉多寻回犬:58.8 +/- 3.2°(Vedrine et al. 2013)

  • 约克夏梗:69.2 +/- 4.5°(Vedrine et al. 2013)

  • 小型犬:70.4 +/- 9°(Witte 2015)

參考資料

  • Aertsens A, Rincon Alvarez J, Poncet CM, Beaufrère H, Ragetly GR. Comparison of the tibia plateau angle between small and large dogs with cranial cruciate ligament disease. Vet Comp Orthop Traumatol. 2015;28(6):385-90. doi: 10.3415/VCOT-14-12-0180. Epub 2015 Sep 18. PMID: 26382888.

  • Guénégo L, Payot M, Charru P, Verwaerde P. Comparison of tibial anatomic-mechanical axis angle between predisposed dogs and dogs at low risk for cranial cruciate ligament rupture. Vet J. 2017 Jul;225:35-41. doi: 10.1016/j.tvjl.2017.04.011. Epub 2017 May 3. PMID: 28720297.

  • Vedrine B, Guillemot A, Fontaine D, Ragetly GR, Etchepareborde S. Comparative anatomy of the proximal tibia in healthy Labrador Retrievers and Yorkshire Terriers. Vet Comp Orthop Traumatol. 2013;26(4):266-70. doi: 10.3415/VCOT-12-02-0018. Epub 2013 Apr 24.

  • Witte PG. Tibial anatomy in normal small breed dogs including anisometry of various extracapsular stabilizing suture attachment sites. Vet Comp Orthop Traumatol. 2015;28(5):331-8. doi: 10.3415/VCOT-14-12-0186. Epub 2015 Jul 21. PMID: 26195139.

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