Bilmont Alexis, Pink Jonathan, Clarke Stephen, Kowaleski Michael P
Willows Referral Service, Solihull, UK.
Cummings School of Veterinary Medicine, Tufts University, North Grafton, Massachusetts, USA.
Vet Surg. 2025 Jan;54(1):219-227. doi: 10.1111/vsu.14139. Epub 2024 Jul 15.
To measure truncated face and open face versions of the biological fixation (BFX) cup in a three-dimensional (3D) model simulating the ventrodorsal radiographic projection with different cup and pelvis positions.
Computer simulation.
Simulated ventrodorsal views were generated in silico using 3D models of a BFX cup and a medium-sized canine pelvis. Truncated face and open face versions of the BFX cup were defined and measured with various angles of cup version, cup inclination, and pelvic extension.
Truncated face version was different from and underestimated open face version by 12° to 22° (p < .001). Open face version varied with inclination while truncated face version was unaffected by inclination. Open face version was dependent on the degree of pelvic extension while truncated face version was unaffected.
Open face version differed from truncated face version. Changes in open face version were not consistently matched by a change in truncated face version.
The open face of the cup may be excessively retroverted without this being reflected by truncated face retroversion as seen on a ventrodorsal radiographic view. However, in this study, BFX cups placed with truncated face version and inclination in the normal range and an ALO of 45° yielded predictable open face version.
在模拟腹背位X线投影的三维（3D）模型中，测量不同髋臼杯和骨盆位置下生物固定（BFX）髋臼杯的截顶面和开口面版本。
计算机模拟。
使用BFX髋臼杯和中型犬骨盆的3D模型在计算机上生成模拟腹背位视图。定义并测量了BFX髋臼杯的截顶面和开口面版本，以及不同的髋臼杯版本角度、髋臼杯倾斜度和骨盆伸展度。
截顶面版本与开口面版本不同，且比开口面版本低12°至22°（p <.001）。开口面版本随倾斜度变化，而截顶面版本不受倾斜度影响。开口面版本取决于骨盆伸展程度，而截顶面版本不受影响。
开口面版本与截顶面版本不同。开口面版本的变化与截顶面版本的变化并不一致。
在腹背位X线视图上，髋臼杯的开口面可能过度后倾，而截顶面后倾情况并未反映这一点。然而，在本研究中，将BFX髋臼杯以截顶面版本和在正常范围内的倾斜度以及45°的髋臼外展角放置时，可得到可预测的开口面版本。
