Purpose
To investigate (1) the correlation between lateral posterior tibial slope (PTS) and
clinical outcomes of lateral meniscus allograft transplantation (MAT) and (2) the
difference of lateral PTS between the extrusion and nonextrusion groups or between
the failure and nonfailure groups in lateral MAT.
Methods
Between January 2001 and February 2016, we retrospectively evaluated 61 patients (mean
age, 29.1 ± 12.2 years) who underwent postoperative magnetic resonance imaging (MRI)
and were followed for a minimum of 2 years after primary lateral MAT. The lateral
PTS and graft extrusion in the coronal and sagittal planes were assessed by using
MRI performed at 1 year postoperatively. Clinical scores and graft failure were evaluated
at the last follow-up visit. The correlation between lateral PTS and clinical outcomes
(clinical scores, graft extrusion) was analyzed. Lateral PTS was compared between
the extrusion and nonextrusion groups and between the failure and nonfailure groups.
Results
Mean lateral PTS on MRI was 6.6° ± 3.1° (range, 0.8° to 15.7°). A significant correlation
was not identified between lateral PTS and clinical outcomes (clinical scores, graft
extrusion in the coronal and sagittal planes). A significant difference in lateral
PTS was not identified between the extrusion and nonextrusion groups in the coronal
(6.2° ± 2.5° vs 7.0° ± 3.4°, P = .400) and sagittal (anterior horn, 6.5° ± 2.3° vs 6.7° ± 3.7°, P = .988; posterior horn, 6.8° ± 3.5° vs 6.5° ± 2.7°, P = .771) planes. Moreover, a significant difference was not identified between the
failure and nonfailure groups (7.5° ± 3.3° vs 6.4° ± 3.0°, P = .388).
Conclusions
A significant correlation between lateral PTS and clinical or radiologic outcomes
of lateral MAT was not identified.
Level of Evidence
Level IV, therapeutic case series with subgroup analysis.
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Article info
Publication history
Accepted:
May 23,
2019
Received:
January 25,
2019
Footnotes
The authors report that they have no conflicts of interest in the authorship and publication of this article. Full ICMJE author disclosure forms are available for this article online, as supplementary material.
Identification
Copyright
© 2019 by the Arthroscopy Association of North America
