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Intertunnel Relationships in Combined Anterior Cruciate Ligament and Posterolateral Corner Reconstruction : An In Vivo 3-Dimensional Anatomic Study

 Sung-Jae Kim  ;  Chong Bum Chang  ;  Chong Hyuk Choi  ;  Yon-Sik Yoo  ;  Sung-Hwan Kim  ;  Jae Han Ko  ;  Kwan Kyu Park 
 AMERICAN JOURNAL OF SPORTS MEDICINE, Vol.41(4) : 849-857, 2013 
Journal Title
Issue Date
Adult ; Anterior Cruciate Ligament Reconstruction* ; Humans ; Imaging, Three-Dimensional* ; Knee Injuries/surgery* ; Knee Joint/diagnostic imaging ; Knee Joint/surgery* ; Male ; Radiography ; Young Adult
intertunnel relationship ; combined anterior cruciate ligament and posterolateral corner reconstruction ; in vivo 3D anatomic study
BACKGROUND: Combined anterior cruciate ligament (ACL) and posterolateral corner (PLC) injuries are relatively common, and tunnel convergence could occur in combined ACL and PLC reconstruction. PURPOSE: This study sought to elucidate the ranges of angles and distances of lateral collateral ligament (LCL) and popliteus tendon (PT) femoral tunnels that do not violate the intercondylar notch distally and ACL tunnels proximally during combined ACL and PLC reconstruction. STUDY DESIGN: Descriptive laboratory study. METHODS: Three-dimensional anatomic knee models were developed using customized software from computed tomography images of 14 patients at 0°, 90°, and 120° of flexion. Single-bundle (SB) and double-bundle (DB) ACL tunnels using the transtibial method for anteromedial bundles and the anteromedial portal method for posterolateral bundles were created. The ranges of safe angles and distances were measured at 10° and 20° posterior, neutral (0°), and 10° and 20° anterior on the horizontal plane relative to the transepicondylar axis from the isometric LCL and PT femoral insertions. The SB ACL reconstruction using the accessory medial portal and LCL reconstruction using the anatomic footprint were also analyzed. RESULTS: Distal and proximal angles from insertions of the LCL and PT, not violating the intercondylar notch or the ACL tunnels, increased as the LCL or PT headed from a posterior to anterior direction. Safe distances from the LCL and PT femoral insertions were approximately over 35 mm distally and 30 mm proximally. For SB ACL reconstruction using the accessory medial portal, safe angles were larger proximally than those of SB ACL reconstruction using the transtibial technique. For LCL reconstruction using the anatomic footprint, proximal angles were significantly smaller than those of the isometric LCL. CONCLUSION: Considering the relationship between the LCL and PT tunnels and fixation strength, tunneling will be safe when the LCL and PT are positioned at an angle of approximately 20° anterior and 10° proximal to the transepicondylar axis. CLINICAL RELEVANCE: These results will help to reduce the incidence of tunnel convergence in combined ACL and PLC reconstructions.
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1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Sung Jae(김성재)
Kim, Sung Hwan(김성환) ORCID logo https://orcid.org/0000-0001-5743-6241
Park, Kwan Kyu(박관규) ORCID logo https://orcid.org/0000-0003-0514-3257
Choi, Chong Hyuk(최종혁) ORCID logo https://orcid.org/0000-0002-9080-4904
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