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- Document type:
- Article; Journal Article
- Author(s):
- Nagai, Kanto; Tashiro, Yasutaka; Herbst, Elmar; Gale, Tom; Wang, Joon Ho; Irrgang, James J; Anderst, William; Fu, Freddie H
- Title:
- Steeper posterior tibial slope correlates with greater tibial tunnel widening after anterior cruciate ligament reconstruction.
- Abstract:
- PURPOSE: To investigate the correlation between posterior tibial slope (PTS) and tibial tunnel widening after anterior cruciate ligament reconstruction (ACL-R). METHODS: Twenty-five patients underwent anatomic single-bundle ACL-R using quadriceps tendon autograft. Six months after surgery, each patient underwent high-resolution computed tomography (CT). Tibial tunnel aperture location was evaluated using a grid method. Medial and lateral PTS (°) was measured based on a previously described method. To evaluate tibial tunnel widening, cross-sectional area (CSA) of the tibial tunnel beneath the aperture was measured using CT axial slice. Nominal elliptical area was calculated using the diameter of a dilator during the surgery and the angle between the axial slice and the tunnel axis. Percentage of tunnel widening (%) was determined by dividing the CSA by the nominal area. Pearson correlation coefficient was used to explore the association between medial/lateral PTS and tibial tunnel widening (P < 0.05). RESULTS: Location of tibial tunnel aperture was 29.8 ± 6.3% in anterior-posterior direction, and 45.7 ± 2.1% in medial-lateral direction. Medial and lateral PTS were 3.7° ± 2.5° and 4.9° ± 2.4° respectively. Tibial tunnel widening was 97.2 ± 20.3%. Tibial tunnel widening was correlated with medial PTS (r = 0.558, P = 0.004) and lateral PTS (r = 0.431, P = 0.031). CONCLUSION: Steeper medial and lateral PTS correlated with greater tibial tunnel widening. The clinical relevance is that surgeons should be aware that PTS may affect tibial tunnel widening after ACL-R. Thus, subjects with steeper PTS may need to be more carefully followed to see if there is greater tibial tunnel widening, which might be important especially in revision ACL-R. LEVEL OF EVIDENCE: III.
- Journal title abbreviation:
- Knee Surg Sports Traumatol Arthrosc
- Year:
- 2018
- Journal volume:
- 26
- Journal issue:
- 12
- Pages contribution:
- 3717-3723
- Fulltext / DOI:
- doi:10.1007/s00167-018-5004-5
- Pubmed ID:
- http://view.ncbi.nlm.nih.gov/pubmed/29869200
- Print-ISSN:
- 0942-2056
- TUM Institution:
- Fachgebiet Sportorthopädie (Prof. Imhoff)
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