Rovesti Gian Luca, Katic Nikola, Dalpozzo Boris, Dondi Francesco, Dupré Gilles
Clinica veterinaria M. E. Miller, Cavriago, Italy.
Vet Surg. 2013 Jan;42(1):51-9. doi: 10.1111/j.1532-950X.2012.01079.x. Epub 2012 Dec 5.
To evaluate the influence of rotation of the tibial tuberosity (TT) in the sagittal plane and angulation of osteotomy in the frontal plane (FPA) on the displacement of patellar tendon (PT) insertion.
Ex vivo biomechanical study.
Canine tibiae (n = 36).
Nine groups of 4 tibiae each had a circular osteotomy of the TT at an FPA from -20° to +20° with increments of 5° for each group. The osteotomized TT was rotated by angles of rotation (AORs) of 10°, 20°, or 30° in the sagittal plane. The craniocaudal (CCD), distoproximal (DPD), and mediolateral (MLD) displacements of a marker located at the PT insertion on the TT were evaluated radiographically. Differences between groups were analyzed by Mann-Whitney U test and Friedman 2-way ANOVA.
There was a significant correlation between the AOR and CCD. A positive FPA resulted in a high CCD and lateral shift of the TT at every AOR. Performing an osteotomy at an FPA of 0° produced the maximum amount of DPD.
FPA and AOR during circular osteotomy of the TT influence the final displacement of the PT insertion in all 3 planes.
评估胫骨结节（TT）在矢状面的旋转及额状面截骨角度（FPA）对髌腱（PT）止点位移的影响。
体外生物力学研究。
犬胫骨（n = 36）。
9组，每组4根胫骨，TT行环形截骨，FPA为-20°至+20°，每组递增5°。截骨后的TT在矢状面旋转10°、20°或30°的旋转角度（AOR）。通过X线评估位于TT上PT止点处标志物的颅尾（CCD）、远近端（DPD）及内外侧（MLD）位移。组间差异采用曼-惠特尼U检验和弗里德曼双向方差分析。
AOR与CCD之间存在显著相关性。正的FPA导致在每个AOR时TT的CCD较高且向外侧移位。在FPA为0°时进行截骨产生的DPD量最大。
TT环形截骨时的FPA和AOR影响PT止点在所有三个平面的最终位移。
