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- Dokumenttyp:
- Article; Comparative Study; Journal Article; Randomized Controlled Trial
- Autor(en):
- Nagai, Kanto; Gale, Tom; Herbst, Elmar; Tashiro, Yasutaka; Irrgang, James J; Tashman, Scott; Fu, Freddie H; Anderst, William
- Titel:
- Knee hyperextension does not adversely affect dynamic in vivo kinematics after anterior cruciate ligament reconstruction.
- Abstract:
- PURPOSE: To evaluate the effect of knee hyperextension on dynamic in vivo kinematics after anterior cruciate ligament reconstruction (ACL-R). METHODS: Forty-two patients underwent unilateral ACL-R. Twenty-four months after surgery, subjects performed level walking and downhill running on a treadmill while dynamic stereo radiographs were acquired at 100 (walking) and 150 Hz (running). Tibiofemoral motion was determined using a validated model-based tracking process, and tibiofemoral translations/rotations were calculated. The range of tibiofemoral motions from 0 to 10% of the gait cycle (heel strike to early stance phase) and side-to-side difference (SSD) were calculated. Maximum knee extension angle of ACL-reconstructed knees during walking was defined as active knee extension angle in each subject. Correlations between maximum knee extension angle and tibiofemoral kinematics data were evaluated using Spearman's rho (P < 0.05). RESULTS: No significant correlation was observed between maximum knee extension angle and the range of anterior tibial translation during functional activities in the ACL-R knees. Maximum knee extension angle was weakly correlated with internal tibial rotation range in ACL-R knee during running (ρ = 0.376, P = 0.014); however, maximum extension angle was not correlated with SSD of internal tibial rotation. SSD of internal tibial rotation was -0.4° ± 1.9° (walking), -1.6° ± 3.1° (running), indicating ACL-R restored rotatory knee range of motion during functional movements. CONCLUSION: Knee hyperextension was not significantly correlated with greater SSD of anterior translation and internal rotation. The clinical relevance is that knee hyperextension does not adversely affect kinematic outcomes after ACL-R and that physiologic knee hyperextension can be restored after ACL-R when knee hyperextension is present. LEVEL OF EVIDENCE: III.
- Zeitschriftentitel:
- Knee Surg Sports Traumatol Arthrosc
- Jahr:
- 2018
- Band / Volume:
- 26
- Heft / Issue:
- 2
- Seitenangaben Beitrag:
- 448-454
- Volltext / DOI:
- doi:10.1007/s00167-017-4653-0
- PubMed:
- http://view.ncbi.nlm.nih.gov/pubmed/28712024
- Print-ISSN:
- 0942-2056
- TUM Einrichtung:
- Fachgebiet Sportorthopädie (Prof. Imhoff)
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