Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.
Veterinary Administration, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
Vet Surg. 2022 May;51(4):688-696. doi: 10.1111/vsu.13796. Epub 2022 Mar 12.
To determine the influence of bone-tunnel anchoring technique on teno-osseous repair of the common calcanean tendon (CCT) in dogs.
Randomized, ex vivo, biomechanical.
Forty-two skeletally mature canine hindlimbs.
Canine hindlimbs were dissected to produce a model simulating avulsion of the CCT and accessory tendons from the calcaneus. Hindlimbs were randomized to 1 of 3 anchoring techniques (n = 14/group): a single transverse tunnel (TT), vertical tunnels (VT), or modified bone tunnels (MT) for teno-osseous repair in a 3-loop-pulley (3LP) pattern using 0 USP polypropylene. Yield, peak and failure loads, construct stiffness, loads to produce a 3 mm teno-osseous gap, and failure modes were compared between groups.
The only difference detected consisted of TT constructs yielding at loads 25% higher than MT constructs (P = .027).
Although yield loads were lower in MT constructs than other groups, the bone-tunnel anchoring techniques tested here did not appear to influence the biomechanical properties or gapping characteristics of teno-osseous repairs in this canine CCT avulsion model.
All drilling techniques and bone-tunnel orientations tested in the study reported here offer viable options to reattach the CCT to the calcaneus. Surgeons should evaluate how bone-tunnel orientation may affect placement of adjunctive fixation methods to stabilize the talocrural joint after primary CCT repair in dogs.
确定骨隧道锚固技术对犬跟腱联合腱（CCT）腱骨修复的影响。
随机、离体、生物力学。
42 只骨骼成熟的犬后肢。
解剖犬后肢，制作模拟 CCT 和副腱从跟骨撕脱的模型。将后肢随机分为 3 种锚固技术（n=14/组）：单横隧道（TT）、垂直隧道（VT）或改良骨隧道（MT），用于在 3 圈滑轮（3LP）模式下进行腱骨修复，使用 0 USP 聚丙烯。在各组之间比较屈服载荷、峰值和失效载荷、结构刚度、产生 3mm 腱骨间隙的载荷以及失效模式。
仅检测到 TT 组的屈服载荷比 MT 组高 25%（P=0.027）。
尽管 MT 组的屈服载荷低于其他组，但此处测试的骨隧道锚固技术似乎并未影响这种犬跟腱联合腱撕脱模型的腱骨修复的生物力学特性或间隙特征。
本研究报告的所有钻孔技术和骨隧道方向都为重新附着 CCT 到跟骨提供了可行的选择。在对犬的主要 CCT 修复后，外科医生应评估骨隧道方向如何影响辅助固定方法的放置，以稳定距下关节。
