PDF(Pubmed)
Abstract：
UNASSIGNED: An appropriate tunnel position, tunnel angle, and tunnel-graft angle are important factors for maintaining the stability and mechanical properties of a posterior cruciate ligament (PCL) graft.
UNASSIGNED: To evaluate the association between tunnel position, tunnel angle, graft signal intensity ratio (SIR), and graft thickness after remnant-preserving PCL reconstruction.
UNASSIGNED: Cross-sectional study; Level of evidence, 3.
UNASSIGNED: Included were patients who had undergone remnant-preserving single-bundle PCL reconstruction using a tibialis anterior allograft between March 2014 and September 2020 and who had minimum 12-month postoperative magnetic resonance imaging scans. Tunnel position and angle were evaluated via 3-dimensional computed tomography, and their association with graft SIR on both the femoral and the tibial sides was determined. Graft thickness and SIR at 3 areas of the graft were evaluated and compared, and their association with tunnel-graft angle was also determined.
UNASSIGNED: Overall, 50 knees (50 patients; 43 male, 7 female) were included. The mean time to postoperative magnetic resonance imaging was 25.8 ± 15.8 months. The mean SIR of the graft\'s midportion was higher compared with that of the proximal and distal portions (P = .028 and P < .001, respectively), and the SIR of the proximal portion was higher compared with that of the distal portion (P = .002). The femoral tunnel-graft angle was more acute than the tibial tunnel-graft angle (P = .004). A more anteriorly and distally located femoral tunnel led to a less acute femoral tunnel-graft angle (P = .005) and a decreased SIR of the proximal portion (P = .040), and a more laterally located tibial tunnel was associated with a less acute tibial tunnel-graft angle (P = .024) and a reduced SIR of the distal portion (P = .044). The mean thicknesses of the graft\'s midportion and distal portion were larger than that of the proximal portion (P < .001). The SIR of the graft\'s midportion was positively correlated with its thickness (r = 0.321; P = .023).
UNASSIGNED: The SIR of the proximal portion of the graft around the femoral tunnel was higher than that of the distal portion around the tibial tunnel. An anteriorly and distally positioned femoral tunnel and a laterally positioned tibial tunnel resulted in less acute tunnel-graft angles that were associated with decreased signal intensity.
UNASSIGNED: To evaluate the association between tunnel position, tunnel angle, graft signal intensity ratio (SIR), and graft thickness after remnant-preserving PCL reconstruction.
UNASSIGNED: Cross-sectional study; Level of evidence, 3.
UNASSIGNED: Included were patients who had undergone remnant-preserving single-bundle PCL reconstruction using a tibialis anterior allograft between March 2014 and September 2020 and who had minimum 12-month postoperative magnetic resonance imaging scans. Tunnel position and angle were evaluated via 3-dimensional computed tomography, and their association with graft SIR on both the femoral and the tibial sides was determined. Graft thickness and SIR at 3 areas of the graft were evaluated and compared, and their association with tunnel-graft angle was also determined.
UNASSIGNED: Overall, 50 knees (50 patients; 43 male, 7 female) were included. The mean time to postoperative magnetic resonance imaging was 25.8 ± 15.8 months. The mean SIR of the graft\'s midportion was higher compared with that of the proximal and distal portions (P = .028 and P < .001, respectively), and the SIR of the proximal portion was higher compared with that of the distal portion (P = .002). The femoral tunnel-graft angle was more acute than the tibial tunnel-graft angle (P = .004). A more anteriorly and distally located femoral tunnel led to a less acute femoral tunnel-graft angle (P = .005) and a decreased SIR of the proximal portion (P = .040), and a more laterally located tibial tunnel was associated with a less acute tibial tunnel-graft angle (P = .024) and a reduced SIR of the distal portion (P = .044). The mean thicknesses of the graft\'s midportion and distal portion were larger than that of the proximal portion (P < .001). The SIR of the graft\'s midportion was positively correlated with its thickness (r = 0.321; P = .023).
UNASSIGNED: The SIR of the proximal portion of the graft around the femoral tunnel was higher than that of the distal portion around the tibial tunnel. An anteriorly and distally positioned femoral tunnel and a laterally positioned tibial tunnel resulted in less acute tunnel-graft angles that were associated with decreased signal intensity.
摘要：
■适当的隧道位置，隧道角度,和隧道移植物角度是维持后交叉韧带（PCL）移植物的稳定性和机械性能的重要因素。
■要评估隧道位置之间的关联，隧道角度,移植物信号强度比(SIR)，保留残余PCL重建后的移植物厚度。
■横断面研究；证据水平，3.
包括在2014年3月至2020年9月期间使用胫骨前同种异体移植物进行保留残余的单束PCL重建的患者，并且至少进行了12个月的术后磁共振成像扫描。通过三维计算机断层扫描评估隧道位置和角度，并确定了它们与股骨和胫骨侧移植物SIR的关联。评估并比较移植物3个区域的移植物厚度和SIR，并确定了它们与隧道移植物角度的关联。
■总的来说，50膝盖（50名患者；43名男性，包括7名女性）。术后磁共振成像的平均时间为25.8±15.8个月。与近端和远端相比，移植物中部的平均SIR较高（分别为P=0.028和P<.001），近端部分的SIR高于远端部分(P=0.002)。股骨隧道移植物角度比胫骨隧道移植物角度更尖锐（P=.004）。股骨隧道的前部和远端位置更多，导致股骨隧道移植物角度不那么尖锐（P=0.005），并且近端部分的SIR降低（P=0.040），和更横向定位的胫骨隧道与较不尖锐的胫骨隧道移植物角度（P=.024）和远端部分SIR降低（P=.044）相关。移植物中部和远端部分的平均厚度大于近端部分的平均厚度(P<.001)。移植物中部的SIR与其厚度呈正相关（r=0.321；P=0.023）。
■股骨隧道周围的移植物的近端部分的SIR高于胫骨隧道周围的远端部分的SIR。前部和远端定位的股骨隧道和侧向定位的胫骨隧道导致与信号强度降低相关的较不尖锐的隧道移植物角度。
■要评估隧道位置之间的关联，隧道角度,移植物信号强度比(SIR)，保留残余PCL重建后的移植物厚度。
■横断面研究；证据水平，3.
包括在2014年3月至2020年9月期间使用胫骨前同种异体移植物进行保留残余的单束PCL重建的患者，并且至少进行了12个月的术后磁共振成像扫描。通过三维计算机断层扫描评估隧道位置和角度，并确定了它们与股骨和胫骨侧移植物SIR的关联。评估并比较移植物3个区域的移植物厚度和SIR，并确定了它们与隧道移植物角度的关联。
■总的来说，50膝盖（50名患者；43名男性，包括7名女性）。术后磁共振成像的平均时间为25.8±15.8个月。与近端和远端相比，移植物中部的平均SIR较高（分别为P=0.028和P<.001），近端部分的SIR高于远端部分(P=0.002)。股骨隧道移植物角度比胫骨隧道移植物角度更尖锐（P=.004）。股骨隧道的前部和远端位置更多，导致股骨隧道移植物角度不那么尖锐（P=0.005），并且近端部分的SIR降低（P=0.040），和更横向定位的胫骨隧道与较不尖锐的胫骨隧道移植物角度（P=.024）和远端部分SIR降低（P=.044）相关。移植物中部和远端部分的平均厚度大于近端部分的平均厚度(P<.001)。移植物中部的SIR与其厚度呈正相关（r=0.321；P=0.023）。
■股骨隧道周围的移植物的近端部分的SIR高于胫骨隧道周围的远端部分的SIR。前部和远端定位的股骨隧道和侧向定位的胫骨隧道导致与信号强度降低相关的较不尖锐的隧道移植物角度。
